## Windows Windows — Onscreen display areas in the target window system |

## Synopsis

    #include <gdk/gdk.h>

    struct              GdkWindow;
    enum                GdkWindowType;
    enum                GdkWindowClass;
    enum                GdkWindowHints;
                        GdkGeometry;
    enum                GdkGravity;
    enum                GdkWindowEdge;
    enum                GdkWindowTypeHint;
                        GdkWindowAttr;
    enum                GdkWindowAttributesType;
    GdkWindow*          gdk_window_new                      (GdkWindow *parent,
                                                             GdkWindowAttr *attributes,
                                                             gint attributes_mask);
    void                gdk_window_destroy                  (GdkWindow *window);
    #define             gdk_window_ref
    #define             gdk_window_unref
    GdkWindowType       gdk_window_get_window_type          (GdkWindow *window);
    GdkWindow*          gdk_window_at_pointer               (gint *win_x,
                                                             gint *win_y);
    void                gdk_window_show                     (GdkWindow *window);
    void                gdk_window_show_unraised            (GdkWindow *window);
    void                gdk_window_hide                     (GdkWindow *window);
    gboolean            gdk_window_is_visible               (GdkWindow *window);
    gboolean            gdk_window_is_viewable              (GdkWindow *window);
    GdkWindowState      gdk_window_get_state                (GdkWindow *window);
    void                gdk_window_withdraw                 (GdkWindow *window);
    void                gdk_window_iconify                  (GdkWindow *window);
    void                gdk_window_deiconify                (GdkWindow *window);
    void                gdk_window_stick                    (GdkWindow *window);
    void                gdk_window_unstick                  (GdkWindow *window);
    void                gdk_window_maximize                 (GdkWindow *window);
    void                gdk_window_unmaximize               (GdkWindow *window);
    void                gdk_window_fullscreen               (GdkWindow *window);
    void                gdk_window_unfullscreen             (GdkWindow *window);
    void                gdk_window_set_keep_above           (GdkWindow *window,
                                                             gboolean setting);
    void                gdk_window_set_keep_below           (GdkWindow *window,
                                                             gboolean setting);
    void                gdk_window_set_opacity              (GdkWindow *window,
                                                             gdouble opacity);
    void                gdk_window_set_composited           (GdkWindow *window,
                                                             gboolean composited);
    void                gdk_window_move                     (GdkWindow *window,
                                                             gint x,
                                                             gint y);
    void                gdk_window_resize                   (GdkWindow *window,
                                                             gint width,
                                                             gint height);
    void                gdk_window_move_resize              (GdkWindow *window,
                                                             gint x,
                                                             gint y,
                                                             gint width,
                                                             gint height);
    void                gdk_window_scroll                   (GdkWindow *window,
                                                             gint dx,
                                                             gint dy);
    void                gdk_window_move_region              (GdkWindow *window,
                                                             GdkRegion *region,
                                                             gint dx,
                                                             gint dy);
    void                gdk_window_reparent                 (GdkWindow *window,
                                                             GdkWindow *new_parent,
                                                             gint x,
                                                             gint y);
    void                gdk_window_clear                    (GdkWindow *window);
    void                gdk_window_clear_area               (GdkWindow *window,
                                                             gint x,
                                                             gint y,
                                                             gint width,
                                                             gint height);
    void                gdk_window_clear_area_e             (GdkWindow *window,
                                                             gint x,
                                                             gint y,
                                                             gint width,
                                                             gint height);
    #define             gdk_window_copy_area                (drawable,gc,x,y,source_drawable,source_x,source_y,width,height)
    void                gdk_window_raise                    (GdkWindow *window);
    void                gdk_window_lower                    (GdkWindow *window);
    void                gdk_window_focus                    (GdkWindow *window,
                                                             guint32 timestamp);
    void                gdk_window_register_dnd             (GdkWindow *window);
    void                gdk_window_begin_resize_drag        (GdkWindow *window,
                                                             GdkWindowEdge edge,
                                                             gint button,
                                                             gint root_x,
                                                             gint root_y,
                                                             guint32 timestamp);
    void                gdk_window_begin_move_drag          (GdkWindow *window,
                                                             gint button,
                                                             gint root_x,
                                                             gint root_y,
                                                             guint32 timestamp);
    void                gdk_window_constrain_size           (GdkGeometry *geometry,
                                                             guint flags,
                                                             gint width,
                                                             gint height,
                                                             gint *new_width,
                                                             gint *new_height);
    void                gdk_window_beep                     (GdkWindow *window);

    void                gdk_window_begin_paint_rect         (GdkWindow *window,
                                                             GdkRectangle *rectangle);
    void                gdk_window_begin_paint_region       (GdkWindow *window,
                                                             GdkRegion *region);
    void                gdk_window_end_paint                (GdkWindow *window);

    void                gdk_window_invalidate_rect          (GdkWindow *window,
                                                             GdkRectangle *rect,
                                                             gboolean invalidate_children);
    void                gdk_window_invalidate_region        (GdkWindow *window,
                                                             GdkRegion *region,
                                                             gboolean invalidate_children);
    void                gdk_window_invalidate_maybe_recurse (GdkWindow *window,
                                                             GdkRegion *region,
                                                             gboolean (*child_func) (GdkWindow *, gpointer),
                                                             gpointer user_data);
    GdkRegion*          gdk_window_get_update_area          (GdkWindow *window);
    void                gdk_window_freeze_updates           (GdkWindow *window);
    void                gdk_window_thaw_updates             (GdkWindow *window);
    void                gdk_window_process_all_updates      (void);
    void                gdk_window_process_updates          (GdkWindow *window,
                                                             gboolean update_children);
    void                gdk_window_set_debug_updates        (gboolean setting);
    void                gdk_window_get_internal_paint_info  (GdkWindow *window,
                                                             GdkDrawable **real_drawable,
                                                             gint *x_offset,
                                                             gint *y_offset);
    void                gdk_window_enable_synchronized_configure
                                                            (GdkWindow *window);
    void                gdk_window_configure_finished       (GdkWindow *window);

    void                gdk_window_set_user_data            (GdkWindow *window,
                                                             gpointer user_data);
    void                gdk_window_set_override_redirect    (GdkWindow *window,
                                                             gboolean override_redirect);
    void                gdk_window_set_accept_focus         (GdkWindow *window,
                                                             gboolean accept_focus);
    void                gdk_window_set_focus_on_map         (GdkWindow *window,
                                                             gboolean focus_on_map);
    void                gdk_window_add_filter               (GdkWindow *window,
                                                             GdkFilterFunc function,
                                                             gpointer data);
    void                gdk_window_remove_filter            (GdkWindow *window,
                                                             GdkFilterFunc function,
                                                             gpointer data);
    GdkFilterReturn     (*GdkFilterFunc)                    (GdkXEvent *xevent,
                                                             GdkEvent *event,
                                                             gpointer data);
    enum                GdkFilterReturn;
    typedef             GdkXEvent;
    void                gdk_window_shape_combine_mask       (GdkWindow *window,
                                                             GdkBitmap *mask,
                                                             gint x,
                                                             gint y);
    void                gdk_window_shape_combine_region     (GdkWindow *window,
                                                             GdkRegion *shape_region,
                                                             gint offset_x,
                                                             gint offset_y);
    void                gdk_window_set_child_shapes         (GdkWindow *window);
    void                gdk_window_merge_child_shapes       (GdkWindow *window);
    void                gdk_window_input_shape_combine_mask (GdkWindow *window,
                                                             GdkBitmap *mask,
                                                             gint x,
                                                             gint y);
    void                gdk_window_input_shape_combine_region
                                                            (GdkWindow *window,
                                                             GdkRegion *shape_region,
                                                             gint offset_x,
                                                             gint offset_y);
    void                gdk_window_set_child_input_shapes   (GdkWindow *window);
    void                gdk_window_merge_child_input_shapes (GdkWindow *window);
    gboolean            gdk_window_set_static_gravities     (GdkWindow *window,
                                                             gboolean use_static);
    void                gdk_window_set_hints                (GdkWindow *window,
                                                             gint x,
                                                             gint y,
                                                             gint min_width,
                                                             gint min_height,
                                                             gint max_width,
                                                             gint max_height,
                                                             gint flags);
    void                gdk_window_set_title                (GdkWindow *window,
                                                             const gchar *title);
    void                gdk_window_set_background           (GdkWindow *window,
                                                             const GdkColor *color);
    void                gdk_window_set_back_pixmap          (GdkWindow *window,
                                                             GdkPixmap *pixmap,
                                                             gboolean parent_relative);
    #define             GDK_PARENT_RELATIVE
    void                gdk_window_set_cursor               (GdkWindow *window,
                                                             GdkCursor *cursor);
    #define             gdk_window_set_colormap
    void                gdk_window_get_user_data            (GdkWindow *window,
                                                             gpointer *data);
    void                gdk_window_get_geometry             (GdkWindow *window,
                                                             gint *x,
                                                             gint *y,
                                                             gint *width,
                                                             gint *height,
                                                             gint *depth);
    void                gdk_window_set_geometry_hints       (GdkWindow *window,
                                                             GdkGeometry *geometry,
                                                             GdkWindowHints geom_mask);
    void                gdk_window_set_icon_list            (GdkWindow *window,
                                                             GList *pixbufs);
    void                gdk_window_set_modal_hint           (GdkWindow *window,
                                                             gboolean modal);
    void                gdk_window_set_type_hint            (GdkWindow *window,
                                                             GdkWindowTypeHint hint);
    GdkWindowTypeHint   gdk_window_get_type_hint            (GdkWindow *window);
    void                gdk_window_set_skip_taskbar_hint    (GdkWindow *window,
                                                             gboolean skips_taskbar);
    void                gdk_window_set_skip_pager_hint      (GdkWindow *window,
                                                             gboolean skips_pager);
    void                gdk_window_set_urgency_hint         (GdkWindow *window,
                                                             gboolean urgent);
    void                gdk_window_get_position             (GdkWindow *window,
                                                             gint *x,
                                                             gint *y);
    void                gdk_window_get_root_origin          (GdkWindow *window,
                                                             gint *x,
                                                             gint *y);
    void                gdk_window_get_frame_extents        (GdkWindow *window,
                                                             GdkRectangle *rect);
    #define             gdk_window_get_size
    #define             gdk_window_get_visual
    #define             gdk_window_get_colormap
    #define             gdk_window_get_type
    gint                gdk_window_get_origin               (GdkWindow *window,
                                                             gint *x,
                                                             gint *y);
    gboolean            gdk_window_get_deskrelative_origin  (GdkWindow *window,
                                                             gint *x,
                                                             gint *y);
    GdkWindow*          gdk_window_get_pointer              (GdkWindow *window,
                                                             gint *x,
                                                             gint *y,
                                                             GdkModifierType *mask);
    enum                GdkModifierType;
    GdkWindow*          gdk_window_get_parent               (GdkWindow *window);
    GdkWindow*          gdk_window_get_toplevel             (GdkWindow *window);
    GList*              gdk_window_get_children             (GdkWindow *window);
    GList*              gdk_window_peek_children            (GdkWindow *window);
    GdkEventMask        gdk_window_get_events               (GdkWindow *window);
    void                gdk_window_set_events               (GdkWindow *window,
                                                             GdkEventMask event_mask);
    void                gdk_window_set_icon                 (GdkWindow *window,
                                                             GdkWindow *icon_window,
                                                             GdkPixmap *pixmap,
                                                             GdkBitmap *mask);
    void                gdk_window_set_icon_name            (GdkWindow *window,
                                                             const gchar *name);
    void                gdk_window_set_transient_for        (GdkWindow *window,
                                                             GdkWindow *parent);
    void                gdk_window_set_role                 (GdkWindow *window,
                                                             const gchar *role);
    void                gdk_window_set_startup_id           (GdkWindow *window,
                                                             const gchar *startup_id);
    void                gdk_window_set_group                (GdkWindow *window,
                                                             GdkWindow *leader);
    GdkWindow*          gdk_window_get_group                (GdkWindow *window);
    void                gdk_window_set_decorations          (GdkWindow *window,
                                                             GdkWMDecoration decorations);
    gboolean            gdk_window_get_decorations          (GdkWindow *window,
                                                             GdkWMDecoration *decorations);
    enum                GdkWMDecoration;
    void                gdk_window_set_functions            (GdkWindow *window,
                                                             GdkWMFunction functions);
    enum                GdkWMFunction;
    GList*              gdk_window_get_toplevels            (void);
    GdkWindow*          gdk_get_default_root_window         (void);

                        GdkPointerHooks;
    GdkPointerHooks*    gdk_set_pointer_hooks               (const GdkPointerHooks *new_hooks);

## Object Hierarchy

      GObject
       +----GdkDrawable
             +----GdkWindow

## Description

A GdkWindow is a rectangular region on the screen. It's a low-level object, used to implement high-level objects such as GtkWidget and GtkWindow on the GTK+ level. A GtkWindow is a toplevel window, the thing a user might think of as a "window" with a titlebar and so on; a GtkWindow may contain many GdkWindow. For example, each GtkButton has a GdkWindow associated with it.

Example 7. Composited windows

    #include <gtk/gtk.h>

    /* The expose event handler for the event box.
     *
     * This function simply draws a transparency onto a widget on the area
     * for which it receives expose events.  This is intended to give the
     * event box a "transparent" background.
     *
     * In order for this to work properly, the widget must have an RGBA
     * colourmap.  The widget should also be set as app-paintable since it
     * doesn't make sense for GTK+ to draw a background if we are drawing it
     * (and because GTK+ might actually replace our transparency with its
     * default background colour).
     */
    static gboolean
    transparent_expose (GtkWidget      *widget,
                        GdkEventExpose *event)
    {
      cairo_t *cr;

      cr = gdk_cairo_create (widget->window);
      cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
      gdk_cairo_region (cr, event->region);
      cairo_fill (cr);
      cairo_destroy (cr);

      return FALSE;
    }

    /* The expose event handler for the window.
     *
     * This function performs the actual compositing of the event box onto
     * the already-existing background of the window at 50% normal opacity.
     *
     * In this case we do not want app-paintable to be set on the widget
     * since we want it to draw its own (red) background. Because of this,
     * however, we must ensure that we use g_signal_register_after so that
     * this handler is called after the red has been drawn. If it was
     * called before then GTK would just blindly paint over our work.
     *
     * Note: if the child window has children, then you need a cairo 1.16
     * feature to make this work correctly.
     */
    static gboolean
    window_expose_event (GtkWidget      *widget,
                         GdkEventExpose *event)
    {
      GdkRegion *region;
      GtkWidget *child;
      cairo_t *cr;

      /* get our child (in this case, the event box) */
      child = gtk_bin_get_child (GTK_BIN (widget));

      /* create a cairo context to draw to the window */
      cr = gdk_cairo_create (widget->window);

      /* the source data is the (composited) event box */
      gdk_cairo_set_source_pixmap (cr, child->window,
                                   child->allocation.x,
                                   child->allocation.y);

      /* draw no more than our expose event intersects our child */
      region = gdk_region_rectangle (&child->allocation);
      gdk_region_intersect (region, event->region);
      gdk_cairo_region (cr, region);
      cairo_clip (cr);

      /* composite, with a 50% opacity */
      cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
      cairo_paint_with_alpha (cr, 0.5);

      /* we're done */
      cairo_destroy (cr);

      return FALSE;
    }

    int
    main (int argc, char **argv)
    {
      GtkWidget *window, *event, *button;
      GdkScreen *screen;
      GdkColormap *rgba;
      GdkColor red;

      gtk_init (&argc, &argv);

      /* Make the widgets */
      button = gtk_button_new_with_label ("A Button");
      event = gtk_event_box_new ();
      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

      /* Put a red background on the window */
      gdk_color_parse ("red", &red);
      gtk_widget_modify_bg (window, GTK_STATE_NORMAL, &red);

      /* Set the colourmap for the event box.
       * Must be done before the event box is realised.
       */
      screen = gtk_widget_get_screen (event);
      rgba = gdk_screen_get_rgba_colormap (screen);
      gtk_widget_set_colormap (event, rgba);

      /* Set our event box to have a fully-transparent background
       * drawn on it. Currently there is no way to simply tell GTK+
       * that "transparency" is the background colour for a widget.
       */
      gtk_widget_set_app_paintable (GTK_WIDGET (event), TRUE);
      g_signal_connect (event, "expose-event",
                        G_CALLBACK (transparent_expose), NULL);

      /* Put them inside one another */
      gtk_container_set_border_width (GTK_CONTAINER (window), 10);
      gtk_container_add (GTK_CONTAINER (window), event);
      gtk_container_add (GTK_CONTAINER (event), button);

      /* Realise and show everything */
      gtk_widget_show_all (window);

      /* Set the event box GdkWindow to be composited.
       * Obviously must be performed after event box is realised.
       */
      gdk_window_set_composited (event->window, TRUE);

      /* Set up the compositing handler.
       * Note that we do _after_ so that the normal (red) background is drawn
       * by gtk before our compositing occurs.
       */
      g_signal_connect_after (window, "expose-event",
                              G_CALLBACK (window_expose_event), NULL);

      gtk_main (<!-- -->);

      return 0;
    }

In the example Example 7, “Composited windows”, a button is placed inside of an event box inside of a window. The event box is set as composited and therefore is no longer automatically drawn to the screen.

When the contents of the event box change, an expose event is generated on its parent window (which, in this case, belongs to the toplevel GtkWindow). The expose handler for this widget is responsible for merging the changes back on the screen in the way that it wishes.

In our case, we merge the contents with a 50% transparency. We also set the background colour of the window to red. The effect is that the background shows through the button.

## Details

### struct GdkWindow

    struct GdkWindow;

An opaque structure representing an onscreen drawable. Pointers to structures of type GdkPixmap, GdkBitmap, and GdkWindow, can often be used interchangeably. The type GdkDrawable refers generically to any of these types.

### enum GdkWindowType

    typedef enum
    {
      GDK_WINDOW_ROOT,
      GDK_WINDOW_TOPLEVEL,
      GDK_WINDOW_CHILD,
      GDK_WINDOW_DIALOG,
      GDK_WINDOW_TEMP,
      GDK_WINDOW_FOREIGN
    } GdkWindowType;

Describes the kind of window.

`GDK_WINDOW_ROOT` | root window; this window has no parent, covers the entire screen, and is created by the window system
`GDK_WINDOW_TOPLEVEL` | toplevel window (used to implement GtkWindow)
`GDK_WINDOW_CHILD` | child window (used to implement e.g. GtkEntry)
`GDK_WINDOW_DIALOG` | useless/deprecated compatibility type
`GDK_WINDOW_TEMP` | override redirect temporary window (used to implement GtkMenu)
`GDK_WINDOW_FOREIGN` | foreign window (see `gdk_window_foreign_new()`)

### enum GdkWindowClass

    typedef enum
    {
      GDK_INPUT_OUTPUT,
      GDK_INPUT_ONLY
    } GdkWindowClass;

`GDK_INPUT_OUTPUT` windows are the standard kind of window you might expect. `GDK_INPUT_ONLY` windows are invisible; they are used to trap events, but you can't draw on them.

`GDK_INPUT_OUTPUT` | window for graphics and events
`GDK_INPUT_ONLY` | window for events only

### enum GdkWindowHints

    typedef enum
    {
      GDK_HINT_POS	       = 1 << 0,
      GDK_HINT_MIN_SIZE    = 1 << 1,
      GDK_HINT_MAX_SIZE    = 1 << 2,
      GDK_HINT_BASE_SIZE   = 1 << 3,
      GDK_HINT_ASPECT      = 1 << 4,
      GDK_HINT_RESIZE_INC  = 1 << 5,
      GDK_HINT_WIN_GRAVITY = 1 << 6,
      GDK_HINT_USER_POS    = 1 << 7,
      GDK_HINT_USER_SIZE   = 1 << 8
    } GdkWindowHints;

Used to indicate which fields of a GdkGeometry struct should be paid attention to. Also, the presence/absence of `GDK_HINT_POS`, `GDK_HINT_USER_POS`, and `GDK_HINT_USER_SIZE` is significant, though they don't directly refer to GdkGeometry fields. `GDK_HINT_USER_POS` will be set automatically by GtkWindow if you call `gtk_window_move()`. `GDK_HINT_USER_POS` and `GDK_HINT_USER_SIZE` should be set if the user specified a size/position using a --geometry command-line argument; `gtk_window_parse_geometry()` automatically sets these flags.

`GDK_HINT_POS` | indicates that the program has positioned the window
`GDK_HINT_MIN_SIZE` | min size fields are set
`GDK_HINT_MAX_SIZE` | max size fields are set
`GDK_HINT_BASE_SIZE` | base size fields are set
`GDK_HINT_ASPECT` | aspect ratio fields are set
`GDK_HINT_RESIZE_INC` | resize increment fields are set
`GDK_HINT_WIN_GRAVITY` | window gravity field is set
`GDK_HINT_USER_POS` | indicates that the window's position was explicitly set by the user
`GDK_HINT_USER_SIZE` | indicates that the window's size was explicitly set by the user

### GdkGeometry

    typedef struct {
      gint min_width;
      gint min_height;
      gint max_width;
      gint max_height;
      gint base_width;
      gint base_height;
      gint width_inc;
      gint height_inc;
      gdouble min_aspect;
      gdouble max_aspect;
      GdkGravity win_gravity;
    } GdkGeometry;

The GdkGeometry struct gives the window manager information about a window's geometry constraints. Normally you would set these on the GTK+ level using `gtk_window_set_geometry_hints()`. GtkWindow then sets the hints on the GdkWindow it creates.

`gdk_window_set_geometry_hints()` expects the hints to be fully valid already and simply passes them to the window manager; in contrast, `gtk_window_set_geometry_hints()` performs some interpretation. For example, GtkWindow will apply the hints to the geometry widget instead of the toplevel window, if you set a geometry widget. Also, the `min_width`/`min_height`/`max_width`/`max_height` fields may be set to -1, and GtkWindow will substitute the size request of the window or geometry widget. If the minimum size hint is not provided, GtkWindow will use its requisition as the minimum size. If the minimum size is provided and a geometry widget is set, GtkWindow will take the minimum size as the minimum size of the geometry widget rather than the entire window. The base size is treated similarly.

The canonical use-case for `gtk_window_set_geometry_hints()` is to get a terminal widget to resize properly. Here, the terminal text area should be the geometry widget; GtkWindow will then automatically set the base size to the size of other widgets in the terminal window, such as the menubar and scrollbar. Then, the `width_inc` and `height_inc` fields should be set to the size of one character in the terminal. Finally, the base size should be set to the size of one character. The net effect is that the minimum size of the terminal will have a 1x1 character terminal area, and only terminal sizes on the "character grid" will be allowed.

Here's an example of how the terminal example would be implemented, assuming a terminal area widget called "terminal" and a toplevel window "toplevel":

    	GdkGeometry hints;

    	hints.base_width = terminal->char_width;
            hints.base_height = terminal->char_height;
            hints.min_width = terminal->char_width;
            hints.min_height = terminal->char_height;
            hints.width_inc = terminal->char_width;
            hints.height_inc = terminal->char_height;

    	gtk_window_set_geometry_hints (GTK_WINDOW (toplevel),
    				       GTK_WIDGET (terminal),
     				       &hints,
    				       GDK_HINT_RESIZE_INC |
                                           GDK_HINT_MIN_SIZE |
                                           GDK_HINT_BASE_SIZE);

The other useful fields are the `min_aspect` and `max_aspect` fields; these contain a width/height ratio as a floating point number. If a geometry widget is set, the aspect applies to the geometry widget rather than the entire window. The most common use of these hints is probably to set `min_aspect` and `max_aspect` to the same value, thus forcing the window to keep a constant aspect ratio.

gint `min_width`; | minimum width of window (or -1 to use requisition, with GtkWindow only)
gint `min_height`; | minimum height of window (or -1 to use requisition, with GtkWindow only)
gint `max_width`; | maximum width of window (or -1 to use requisition, with GtkWindow only)
gint `max_height`; | maximum height of window (or -1 to use requisition, with GtkWindow only)
gint `base_width`; | allowed window widths are `base_width` + `width_inc` * N where N is any integer (-1 allowed with GtkWindow)
gint `base_height`; | allowed window widths are `base_height` + `height_inc` * N where N is any integer (-1 allowed with GtkWindow)
gint `width_inc`; | width resize increment
gint `height_inc`; | height resize increment
gdouble `min_aspect`; | minimum width/height ratio
gdouble `max_aspect`; | maximum width/height ratio
GdkGravity `win_gravity`; | window gravity, see `gtk_window_set_gravity()`

### enum GdkGravity

    typedef enum
    {
      GDK_GRAVITY_NORTH_WEST = 1,
      GDK_GRAVITY_NORTH,
      GDK_GRAVITY_NORTH_EAST,
      GDK_GRAVITY_WEST,
      GDK_GRAVITY_CENTER,
      GDK_GRAVITY_EAST,
      GDK_GRAVITY_SOUTH_WEST,
      GDK_GRAVITY_SOUTH,
      GDK_GRAVITY_SOUTH_EAST,
      GDK_GRAVITY_STATIC
    } GdkGravity;

Defines the reference point of a window and the meaning of coordinates passed to `gtk_window_move()`. See `gtk_window_move()` and the "implementation notes" section of the Extended Window Manager Hints specification for more details.

`GDK_GRAVITY_NORTH_WEST` | the reference point is at the top left corner.
`GDK_GRAVITY_NORTH` | the reference point is in the middle of the top edge.
`GDK_GRAVITY_NORTH_EAST` | the reference point is at the top right corner.
`GDK_GRAVITY_WEST` | the reference point is at the middle of the left edge.
`GDK_GRAVITY_CENTER` | the reference point is at the center of the window.
`GDK_GRAVITY_EAST` | the reference point is at the middle of the right edge.
`GDK_GRAVITY_SOUTH_WEST` | the reference point is at the lower left corner.
`GDK_GRAVITY_SOUTH` | the reference point is at the middle of the lower edge.
`GDK_GRAVITY_SOUTH_EAST` | the reference point is at the lower right corner.
`GDK_GRAVITY_STATIC` | the reference point is at the top left corner of the window itself, ignoring window manager decorations.

### enum GdkWindowEdge

    typedef enum
    {
      GDK_WINDOW_EDGE_NORTH_WEST,
      GDK_WINDOW_EDGE_NORTH,
      GDK_WINDOW_EDGE_NORTH_EAST,
      GDK_WINDOW_EDGE_WEST,
      GDK_WINDOW_EDGE_EAST,
      GDK_WINDOW_EDGE_SOUTH_WEST,
      GDK_WINDOW_EDGE_SOUTH,
      GDK_WINDOW_EDGE_SOUTH_EAST
    } GdkWindowEdge;

Determines a window edge or corner.

`GDK_WINDOW_EDGE_NORTH_WEST` | the top left corner.
`GDK_WINDOW_EDGE_NORTH` | the top edge.
`GDK_WINDOW_EDGE_NORTH_EAST` | the top right corner.
`GDK_WINDOW_EDGE_WEST` | the left edge.
`GDK_WINDOW_EDGE_EAST` | the right edge.
`GDK_WINDOW_EDGE_SOUTH_WEST` | the lower left corner.
`GDK_WINDOW_EDGE_SOUTH` | the lower edge.
`GDK_WINDOW_EDGE_SOUTH_EAST` | the lower right corner.

### enum GdkWindowTypeHint

    typedef enum
    {
      GDK_WINDOW_TYPE_HINT_NORMAL,
      GDK_WINDOW_TYPE_HINT_DIALOG,
      GDK_WINDOW_TYPE_HINT_MENU,		/* Torn off menu */
      GDK_WINDOW_TYPE_HINT_TOOLBAR,
      GDK_WINDOW_TYPE_HINT_SPLASHSCREEN,
      GDK_WINDOW_TYPE_HINT_UTILITY,
      GDK_WINDOW_TYPE_HINT_DOCK,
      GDK_WINDOW_TYPE_HINT_DESKTOP,
      GDK_WINDOW_TYPE_HINT_DROPDOWN_MENU,	/* A drop down menu (from a menubar) */
      GDK_WINDOW_TYPE_HINT_POPUP_MENU,	/* A popup menu (from right-click) */
      GDK_WINDOW_TYPE_HINT_TOOLTIP,
      GDK_WINDOW_TYPE_HINT_NOTIFICATION,
      GDK_WINDOW_TYPE_HINT_COMBO,
      GDK_WINDOW_TYPE_HINT_DND
    } GdkWindowTypeHint;

These are hints for the window manager that indicate what type of function the window has. The window manager can use this when determining decoration and behaviour of the window. The hint must be set before mapping the window.

See the Extended Window Manager Hints specification for more details about window types.

`GDK_WINDOW_TYPE_HINT_NORMAL` | Normal toplevel window.
`GDK_WINDOW_TYPE_HINT_DIALOG` | Dialog window.
`GDK_WINDOW_TYPE_HINT_MENU` | Window used to implement a menu; GTK+ uses this hint only for torn-off menus, see GtkTearoffMenuItem.
`GDK_WINDOW_TYPE_HINT_TOOLBAR` | Window used to implement toolbars.
`GDK_WINDOW_TYPE_HINT_SPLASHSCREEN` | Window used to display a splash screen during application startup.
`GDK_WINDOW_TYPE_HINT_UTILITY` | Utility windows which are not detached toolbars or dialogs.
`GDK_WINDOW_TYPE_HINT_DOCK` | Used for creating dock or panel windows.
`GDK_WINDOW_TYPE_HINT_DESKTOP` | Used for creating the desktop background window.
`GDK_WINDOW_TYPE_HINT_DROPDOWN_MENU` | A menu that belongs to a menubar.
`GDK_WINDOW_TYPE_HINT_POPUP_MENU` | A menu that does not belong to a menubar, e.g. a context menu.
`GDK_WINDOW_TYPE_HINT_TOOLTIP` | A tooltip.
`GDK_WINDOW_TYPE_HINT_NOTIFICATION` | A notification - typically a "bubble" that belongs to a status icon.
`GDK_WINDOW_TYPE_HINT_COMBO` | A popup from a combo box.
`GDK_WINDOW_TYPE_HINT_DND` | A window that is used to implement a DND cursor.

### GdkWindowAttr

    typedef struct {
      gchar *title;
      gint event_mask;
      gint x, y;
      gint width;
      gint height;
      GdkWindowClass wclass;
      GdkVisual *visual;
      GdkColormap *colormap;
      GdkWindowType window_type;
      GdkCursor *cursor;
      gchar *wmclass_name;
      gchar *wmclass_class;
      gboolean override_redirect;
      GdkWindowTypeHint type_hint;
    } GdkWindowAttr;

Attributes to use for a newly-created window.

gchar *`title`; | title of the window (for toplevel windows)
gint `event_mask`; | event mask (see `gdk_window_set_events()`)
gint `x`; | X coordinate relative to parent window (see `gdk_window_move()`)
gint `y`; | Y coordinate relative to parent window (see `gdk_window_move()`)
gint `width`; | width of window
gint `height`; | height of window
GdkWindowClass `wclass`; | GDK_INPUT_OUTPUT (normal window) or GDK_INPUT_ONLY (invisible window that receives events)
GdkVisual *`visual`; | GdkVisual for window
GdkColormap *`colormap`; | GdkColormap for window
GdkWindowType `window_type`; | type of window
GdkCursor *`cursor`; | cursor for the window (see `gdk_window_set_cursor()`)
gchar *`wmclass_name`; | don't use (see `gtk_window_set_wmclass()`)
gchar *`wmclass_class`; | don't use (see `gtk_window_set_wmclass()`)
gboolean `override_redirect`; | `TRUE` to bypass the window manager
GdkWindowTypeHint `type_hint`; | a hint of the function of the window

### enum GdkWindowAttributesType

    typedef enum
    {
      GDK_WA_TITLE	   = 1 << 1,
      GDK_WA_X	   = 1 << 2,
      GDK_WA_Y	   = 1 << 3,
      GDK_WA_CURSOR	   = 1 << 4,
      GDK_WA_COLORMAP  = 1 << 5,
      GDK_WA_VISUAL	   = 1 << 6,
      GDK_WA_WMCLASS   = 1 << 7,
      GDK_WA_NOREDIR   = 1 << 8,
      GDK_WA_TYPE_HINT = 1 << 9
    } GdkWindowAttributesType;

Used to indicate which fields in the GdkWindowAttr struct should be honored. For example, if you filled in the "cursor" and "x" fields of GdkWindowAttr, pass "`GDK_WA_X` | `GDK_WA_CURSOR`" to `gdk_window_new()`. Fields in GdkWindowAttr not covered by a bit in this enum are required; for example, the `width`/`height`, `wclass`, and `window_type` fields are required, they have no corresponding flag in GdkWindowAttributesType.

`GDK_WA_TITLE` | Honor the title field
`GDK_WA_X` | Honor the X coordinate field
`GDK_WA_Y` | Honor the Y coordinate field
`GDK_WA_CURSOR` | Honor the cursor field
`GDK_WA_COLORMAP` | Honor the colormap field
`GDK_WA_VISUAL` | Honor the visual field
`GDK_WA_WMCLASS` | Honor the wmclass_class and wmclass_name fields
`GDK_WA_NOREDIR` | Honor the override_redirect field
`GDK_WA_TYPE_HINT` | Honor the type_hint field

### gdk_window_new ()

    GdkWindow*          gdk_window_new                      (GdkWindow *parent,
                                                             GdkWindowAttr *attributes,
                                                             gint attributes_mask);

Creates a new GdkWindow using the attributes from `attributes`. See GdkWindowAttr and GdkWindowAttributesType for more details. Note: to use this on displays other than the default display, `parent` must be specified.

`parent` : | a GdkWindow, or `NULL` to create the window as a child of the default root window for the default display.
`attributes` : | attributes of the new window
`attributes_mask` : | mask indicating which fields in `attributes` are valid
Returns : | the new GdkWindow

### gdk_window_destroy ()

    void                gdk_window_destroy                  (GdkWindow *window);

Destroys the window system resources associated with `window` and decrements `window`'s reference count. The window system resources for all children of `window` are also destroyed, but the children's reference counts are not decremented.

Note that a window will not be destroyed automatically when its reference count reaches zero. You must call this function yourself before that happens.

`window` : | a GdkWindow

### gdk_window_ref

    #define gdk_window_ref                 gdk_drawable_ref

### Warning

`gdk_window_ref` is deprecated and should not be used in newly-written code.

Deprecated equivalent of `g_object_ref()`

Returns : | the window

### gdk_window_unref

    #define gdk_window_unref               gdk_drawable_unref

### Warning

`gdk_window_unref` is deprecated and should not be used in newly-written code.

Deprecated equivalent of `g_object_unref()`

### gdk_window_get_window_type ()

    GdkWindowType       gdk_window_get_window_type          (GdkWindow *window);

Gets the type of the window. See GdkWindowType.

`window` : | a GdkWindow
Returns : | type of window

### gdk_window_at_pointer ()

    GdkWindow*          gdk_window_at_pointer               (gint *win_x,
                                                             gint *win_y);

Obtains the window underneath the mouse pointer, returning the location of that window in `win_x`, `win_y`. Returns `NULL` if the window under the mouse pointer is not known to GDK (if the window belongs to another application and a GdkWindow hasn't been created for it with `gdk_window_foreign_new()`)

NOTE: For multihead-aware widgets or applications use `gdk_display_get_window_at_pointer()` instead.

`win_x` : | return location for origin of the window under the pointer
`win_y` : | return location for origin of the window under the pointer
Returns : | window under the mouse pointer

### gdk_window_show ()

    void                gdk_window_show                     (GdkWindow *window);

Like `gdk_window_show_unraised()`, but also raises the window to the top of the window stack (moves the window to the front of the Z-order).

This function maps a window so it's visible onscreen. Its opposite is `gdk_window_hide()`.

When implementing a GtkWidget, you should call this function on the widget's GdkWindow as part of the "map" method.

`window` : | a GdkWindow

### gdk_window_show_unraised ()

    void                gdk_window_show_unraised            (GdkWindow *window);

Shows a GdkWindow onscreen, but does not modify its stacking order. In contrast, `gdk_window_show()` will raise the window to the top of the window stack.

On the X11 platform, in Xlib terms, this function calls `XMapWindow()` (it also updates some internal GDK state, which means that you can't really use `XMapWindow()` directly on a GDK window).

`window` : | a GdkWindow

### gdk_window_hide ()

    void                gdk_window_hide                     (GdkWindow *window);

For toplevel windows, withdraws them, so they will no longer be known to the window manager; for all windows, unmaps them, so they won't be displayed. Normally done automatically as part of `gtk_widget_hide()`.

`window` : | a GdkWindow

### gdk_window_is_visible ()

    gboolean            gdk_window_is_visible               (GdkWindow *window);

Checks whether the window has been mapped (with `gdk_window_show()` or `gdk_window_show_unraised()`).

`window` : | a GdkWindow
Returns : | `TRUE` if the window is mapped

### gdk_window_is_viewable ()

    gboolean            gdk_window_is_viewable              (GdkWindow *window);

Check if the window and all ancestors of the window are mapped. (This is not necessarily "viewable" in the X sense, since we only check as far as we have GDK window parents, not to the root window.)

`window` : | a GdkWindow
Returns : | `TRUE` if the window is viewable

### gdk_window_get_state ()

    GdkWindowState      gdk_window_get_state                (GdkWindow *window);

Gets the bitwise OR of the currently active window state flags, from the GdkWindowState enumeration.

`window` : | a GdkWindow
Returns : | window state bitfield

### gdk_window_withdraw ()

    void                gdk_window_withdraw                 (GdkWindow *window);

Withdraws a window (unmaps it and asks the window manager to forget about it). This function is not really useful as `gdk_window_hide()` automatically withdraws toplevel windows before hiding them.

`window` : | a toplevel GdkWindow

### gdk_window_iconify ()

    void                gdk_window_iconify                  (GdkWindow *window);

Asks to iconify (minimize) `window`. The window manager may choose to ignore the request, but normally will honor it. Using `gtk_window_iconify()` is preferred, if you have a GtkWindow widget.

This function only makes sense when `window` is a toplevel window.

`window` : | a toplevel GdkWindow

### gdk_window_deiconify ()

    void                gdk_window_deiconify                (GdkWindow *window);

Attempt to deiconify (unminimize) `window`. On X11 the window manager may choose to ignore the request to deiconify. When using GTK+, use `gtk_window_deiconify()` instead of the GdkWindow variant. Or better yet, you probably want to use `gtk_window_present()`, which raises the window, focuses it, unminimizes it, and puts it on the current desktop.

`window` : | a toplevel GdkWindow

### gdk_window_stick ()

    void                gdk_window_stick                    (GdkWindow *window);

"Pins" a window such that it's on all workspaces and does not scroll with viewports, for window managers that have scrollable viewports. (When using GtkWindow, `gtk_window_stick()` may be more useful.)

On the X11 platform, this function depends on window manager support, so may have no effect with many window managers. However, GDK will do the best it can to convince the window manager to stick the window. For window managers that don't support this operation, there's nothing you can do to force it to happen.

`window` : | a toplevel GdkWindow

### gdk_window_unstick ()

    void                gdk_window_unstick                  (GdkWindow *window);

Reverse operation for `gdk_window_stick()`; see `gdk_window_stick()`, and `gtk_window_unstick()`.

`window` : | a toplevel GdkWindow

### gdk_window_maximize ()

    void                gdk_window_maximize                 (GdkWindow *window);

Maximizes the window. If the window was already maximized, then this function does nothing.

On X11, asks the window manager to maximize `window`, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "maximized"; so you can't rely on the maximization actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

On Windows, reliably maximizes the window.

`window` : | a toplevel GdkWindow

### gdk_window_unmaximize ()

    void                gdk_window_unmaximize               (GdkWindow *window);

Unmaximizes the window. If the window wasn't maximized, then this function does nothing.

On X11, asks the window manager to unmaximize `window`, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "maximized"; so you can't rely on the unmaximization actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

On Windows, reliably unmaximizes the window.

`window` : | a toplevel GdkWindow

### gdk_window_fullscreen ()

    void                gdk_window_fullscreen               (GdkWindow *window);

Moves the window into fullscreen mode. This means the window covers the entire screen and is above any panels or task bars.

If the window was already fullscreen, then this function does nothing.

On X11, asks the window manager to put `window` in a fullscreen state, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "fullscreen"; so you can't rely on the fullscreenification actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

`window` : | a toplevel GdkWindow

Since 2.2

### gdk_window_unfullscreen ()

    void                gdk_window_unfullscreen             (GdkWindow *window);

Moves the window out of fullscreen mode. If the window was not fullscreen, does nothing.

On X11, asks the window manager to move `window` out of the fullscreen state, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "fullscreen"; so you can't rely on the unfullscreenification actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

`window` : | a toplevel GdkWindow

Since 2.2

### gdk_window_set_keep_above ()

    void                gdk_window_set_keep_above           (GdkWindow *window,
                                                             gboolean setting);

Set if `window` must be kept above other windows. If the window was already above, then this function does nothing.

On X11, asks the window manager to keep `window` above, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "keep above"; so you can't rely on the window being kept above. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

`window` : | a toplevel GdkWindow
`setting` : | whether to keep `window` above other windows

Since 2.4

### gdk_window_set_keep_below ()

    void                gdk_window_set_keep_below           (GdkWindow *window,
                                                             gboolean setting);

Set if `window` must be kept below other windows. If the window was already below, then this function does nothing.

On X11, asks the window manager to keep `window` below, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "keep below"; so you can't rely on the window being kept below. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

`window` : | a toplevel GdkWindow
`setting` : | whether to keep `window` below other windows

Since 2.4

### gdk_window_set_opacity ()

    void                gdk_window_set_opacity              (GdkWindow *window,
                                                             gdouble opacity);

Request the windowing system to make `window` partially transparent, with opacity 0 being fully transparent and 1 fully opaque. (Values of the opacity parameter are clamped to the [0,1] range.)

On X11, this works only on X screens with a compositing manager running.

For setting up per-pixel alpha, see `gdk_screen_get_rgba_colormap()`. For making non-toplevel windows translucent, see `gdk_window_set_composited()`.

`window` : | a top-level GdkWindow
`opacity` : | opacity

Since 2.12

### gdk_window_set_composited ()

    void                gdk_window_set_composited           (GdkWindow *window,
                                                             gboolean composited);

Sets a GdkWindow as composited, or unsets it. Composited windows do not automatically have their contents drawn to the screen. Drawing is redirected to an offscreen buffer and an expose event is emitted on the parent of the composited window. It is the responsibility of the parent's expose handler to manually merge the off-screen content onto the screen in whatever way it sees fit. See Example 7, “Composited windows” for an example.

It only makes sense for child windows to be composited; see `gdk_window_set_opacity()` if you need translucent toplevel windows.

An additional effect of this call is that the area of this window is no longer clipped from regions marked for invalidation on its parent. Draws done on the parent window are also no longer clipped by the child.

This call is only supported on some systems (currently, only X11 with new enough Xcomposite and Xdamage extensions). You must call `gdk_display_supports_composite()` to check if setting a window as composited is supported before attempting to do so.

`window` : | a GdkWindow
`composited` : | `TRUE` to set the window as composited

Since 2.12

### gdk_window_move ()

    void                gdk_window_move                     (GdkWindow *window,
                                                             gint x,
                                                             gint y);

Repositions a window relative to its parent window. For toplevel windows, window managers may ignore or modify the move; you should probably use `gtk_window_move()` on a GtkWindow widget anyway, instead of using GDK functions. For child windows, the move will reliably succeed.

If you're also planning to resize the window, use `gdk_window_move_resize()` to both move and resize simultaneously, for a nicer visual effect.

`window` : | a GdkWindow
`x` : | X coordinate relative to window's parent
`y` : | Y coordinate relative to window's parent

### gdk_window_resize ()

    void                gdk_window_resize                   (GdkWindow *window,
                                                             gint width,
                                                             gint height);

Resizes `window`; for toplevel windows, asks the window manager to resize the window. The window manager may not allow the resize. When using GTK+, use `gtk_window_resize()` instead of this low-level GDK function.

Windows may not be resized below 1x1.

If you're also planning to move the window, use `gdk_window_move_resize()` to both move and resize simultaneously, for a nicer visual effect.

`window` : | a GdkWindow
`width` : | new width of the window
`height` : | new height of the window

### gdk_window_move_resize ()

    void                gdk_window_move_resize              (GdkWindow *window,
                                                             gint x,
                                                             gint y,
                                                             gint width,
                                                             gint height);

Equivalent to calling `gdk_window_move()` and `gdk_window_resize()`, except that both operations are performed at once, avoiding strange visual effects. (i.e. the user may be able to see the window first move, then resize, if you don't use `gdk_window_move_resize()`.)

`window` : | a GdkWindow
`x` : | new X position relative to window's parent
`y` : | new Y position relative to window's parent
`width` : | new width
`height` : | new height

### gdk_window_scroll ()

    void                gdk_window_scroll                   (GdkWindow *window,
                                                             gint dx,
                                                             gint dy);

Scroll the contents of its window, both pixels and children, by the given amount. Portions of the window that the scroll operation brings in from offscreen areas are invalidated.

`window` : | a GdkWindow
`dx` : | Amount to scroll in the X direction
`dy` : | Amount to scroll in the Y direction

### gdk_window_move_region ()

    void                gdk_window_move_region              (GdkWindow *window,
                                                             GdkRegion *region,
                                                             gint dx,
                                                             gint dy);

Move the part of `window` indicated by `region` by `dy` pixels in the Y direction and `dx` pixels in the X direction. The portions of `region` that not covered by the new position of `region` are invalidated.

Child windows are not moved.

`window` : | a GdkWindow
`region` : | The GdkRegion to move
`dx` : | Amount to move in the X direction
`dy` : | Amount to move in the Y direction

Since 2.8

### gdk_window_reparent ()

    void                gdk_window_reparent                 (GdkWindow *window,
                                                             GdkWindow *new_parent,
                                                             gint x,
                                                             gint y);

Reparents `window` into the given `new_parent`. The window being reparented will be unmapped as a side effect.

`window` : | a GdkWindow
`new_parent` : | new parent to move `window` into
`x` : | X location inside the new parent
`y` : | Y location inside the new parent

### gdk_window_clear ()

    void                gdk_window_clear                    (GdkWindow *window);

Clears an entire `window` to the background color or background pixmap.

`window` : | a GdkWindow

### gdk_window_clear_area ()

    void                gdk_window_clear_area               (GdkWindow *window,
                                                             gint x,
                                                             gint y,
                                                             gint width,
                                                             gint height);

Clears an area of `window` to the background color or background pixmap.

`window` : | a GdkWindow
`x` : | x coordinate of rectangle to clear
`y` : | y coordinate of rectangle to clear
`width` : | width of rectangle to clear
`height` : | height of rectangle to clear

### gdk_window_clear_area_e ()

    void                gdk_window_clear_area_e             (GdkWindow *window,
                                                             gint x,
                                                             gint y,
                                                             gint width,
                                                             gint height);

Like `gdk_window_clear_area()`, but also generates an expose event for the cleared area.

This function has a stupid name because it dates back to the mists time, pre-GDK-1.0.

`window` : | a GdkWindow
`x` : | x coordinate of rectangle to clear
`y` : | y coordinate of rectangle to clear
`width` : | width of rectangle to clear
`height` : | height of rectangle to clear

### gdk_window_copy_area()

    #define             gdk_window_copy_area(drawable,gc,x,y,source_drawable,source_x,source_y,width,height)

### Warning

`gdk_window_copy_area` is deprecated and should not be used in newly-written code.

Deprecated equivalent to `gdk_draw_drawable()`, see that function for docs

`drawable` : | a GdkDrawable
`gc` : | a GdkGC sharing the drawable's visual and colormap
`x` : | X position in `drawable` where the rectangle should be drawn
`y` : | Y position in `drawable` where the rectangle should be drawn
`source_drawable` : | the source GdkDrawable, which may be the same as `drawable`
`source_x` : | X position in `src` of rectangle to draw
`source_y` : | Y position in `src` of rectangle to draw
`width` : | width of rectangle to draw, or -1 for entire `src` width
`height` : | height of rectangle to draw, or -1 for entire `src` height

### gdk_window_raise ()

    void                gdk_window_raise                    (GdkWindow *window);

Raises `window` to the top of the Z-order (stacking order), so that other windows with the same parent window appear below `window`. This is true whether or not the windows are visible.

If `window` is a toplevel, the window manager may choose to deny the request to move the window in the Z-order, `gdk_window_raise()` only requests the restack, does not guarantee it.

`window` : | a GdkWindow

### gdk_window_lower ()

    void                gdk_window_lower                    (GdkWindow *window);

Lowers `window` to the bottom of the Z-order (stacking order), so that other windows with the same parent window appear above `window`. This is true whether or not the other windows are visible.

If `window` is a toplevel, the window manager may choose to deny the request to move the window in the Z-order, `gdk_window_lower()` only requests the restack, does not guarantee it.

Note that `gdk_window_show()` raises the window again, so don't call this function before `gdk_window_show()`. (Try `gdk_window_show_unraised()`.)

`window` : | a GdkWindow

### gdk_window_focus ()

    void                gdk_window_focus                    (GdkWindow *window,
                                                             guint32 timestamp);

Sets keyboard focus to `window`. In most cases, `gtk_window_present()` should be used on a GtkWindow, rather than calling this function.

`window` : | a GdkWindow
`timestamp` : | timestamp of the event triggering the window focus

### gdk_window_register_dnd ()

    void                gdk_window_register_dnd             (GdkWindow *window);

Registers a window as a potential drop destination.

`window` : | a GdkWindow.

### gdk_window_begin_resize_drag ()

    void                gdk_window_begin_resize_drag        (GdkWindow *window,
                                                             GdkWindowEdge edge,
                                                             gint button,
                                                             gint root_x,
                                                             gint root_y,
                                                             guint32 timestamp);

Begins a window resize operation (for a toplevel window). You might use this function to implement a "window resize grip," for example; in fact GtkStatusbar uses it. The function works best with window managers that support the Extended Window Manager Hints, but has a fallback implementation for other window managers.

`window` : | a toplevel GdkWindow
`edge` : | the edge or corner from which the drag is started
`button` : | the button being used to drag
`root_x` : | root window X coordinate of mouse click that began the drag
`root_y` : | root window Y coordinate of mouse click that began the drag
`timestamp` : | timestamp of mouse click that began the drag (use `gdk_event_get_time()`)

### gdk_window_begin_move_drag ()

    void                gdk_window_begin_move_drag          (GdkWindow *window,
                                                             gint button,
                                                             gint root_x,
                                                             gint root_y,
                                                             guint32 timestamp);

Begins a window move operation (for a toplevel window). You might use this function to implement a "window move grip," for example. The function works best with window managers that support the Extended Window Manager Hints, but has a fallback implementation for other window managers.

`window` : | a toplevel GdkWindow
`button` : | the button being used to drag
`root_x` : | root window X coordinate of mouse click that began the drag
`root_y` : | root window Y coordinate of mouse click that began the drag
`timestamp` : | timestamp of mouse click that began the drag

### gdk_window_constrain_size ()

    void                gdk_window_constrain_size           (GdkGeometry *geometry,
                                                             guint flags,
                                                             gint width,
                                                             gint height,
                                                             gint *new_width,
                                                             gint *new_height);

Constrains a desired width and height according to a set of geometry hints (such as minimum and maximum size).

`geometry` : | a GdkGeometry structure
`flags` : | a mask indicating what portions of `geometry` are set
`width` : | desired width of window
`height` : | desired height of the window
`new_width` : | location to store resulting width
`new_height` : | location to store resulting height

### gdk_window_beep ()

    void                gdk_window_beep                     (GdkWindow *window);

Emits a short beep associated to `window` in the appropriate display, if supported. Otherwise, emits a short beep on the display just as `gdk_display_beep()`.

`window` : | a toplevel GdkWindow

Since 2.12

### gdk_window_begin_paint_rect ()

    void                gdk_window_begin_paint_rect         (GdkWindow *window,
                                                             GdkRectangle *rectangle);

A convenience wrapper around `gdk_window_begin_paint_region()` which creates a rectangular region for you. See `gdk_window_begin_paint_region()` for details.

`window` : | a GdkWindow
`rectangle` : | rectangle you intend to draw to

### gdk_window_begin_paint_region ()

    void                gdk_window_begin_paint_region       (GdkWindow *window,
                                                             GdkRegion *region);

Indicates that you are beginning the process of redrawing `region`. A backing store (offscreen buffer) large enough to contain `region` will be created. The backing store will be initialized with the background color or background pixmap for `window`. Then, all drawing operations performed on `window` will be diverted to the backing store. When you call `gdk_window_end_paint()`, the backing store will be copied to `window`, making it visible onscreen. Only the part of `window` contained in `region` will be modified; that is, drawing operations are clipped to `region`.

The net result of all this is to remove flicker, because the user sees the finished product appear all at once when you call `gdk_window_end_paint()`. If you draw to `window` directly without calling `gdk_window_begin_paint_region()`, the user may see flicker as individual drawing operations are performed in sequence. The clipping and background-initializing features of `gdk_window_begin_paint_region()` are conveniences for the programmer, so you can avoid doing that work yourself.

When using GTK+, the widget system automatically places calls to `gdk_window_begin_paint_region()` and `gdk_window_end_paint()` around emissions of the expose_event signal. That is, if you're writing an expose event handler, you can assume that the exposed area in GdkEventExpose has already been cleared to the window background, is already set as the clip region, and already has a backing store. Therefore in most cases, application code need not call `gdk_window_begin_paint_region()`. (You can disable the automatic calls around expose events on a widget-by-widget basis by calling `gtk_widget_set_double_buffered()`.)

If you call this function multiple times before calling the matching `gdk_window_end_paint()`, the backing stores are pushed onto a stack. `gdk_window_end_paint()` copies the topmost backing store onscreen, subtracts the topmost region from all other regions in the stack, and pops the stack. All drawing operations affect only the topmost backing store in the stack. One matching call to `gdk_window_end_paint()` is required for each call to `gdk_window_begin_paint_region()`.

`window` : | a GdkWindow
`region` : | region you intend to draw to

### gdk_window_end_paint ()

    void                gdk_window_end_paint                (GdkWindow *window);

Indicates that the backing store created by the most recent call to `gdk_window_begin_paint_region()` should be copied onscreen and deleted, leaving the next-most-recent backing store or no backing store at all as the active paint region. See `gdk_window_begin_paint_region()` for full details. It is an error to call this function without a matching `gdk_window_begin_paint_region()` first.

`window` : | a GdkWindow

### gdk_window_invalidate_rect ()

    void                gdk_window_invalidate_rect          (GdkWindow *window,
                                                             GdkRectangle *rect,
                                                             gboolean invalidate_children);

A convenience wrapper around `gdk_window_invalidate_region()` which invalidates a rectangular region. See `gdk_window_invalidate_region()` for details.

`window` : | a GdkWindow
`rect` : | rectangle to invalidate or `NULL` to invalidate the whole window
`invalidate_children` : | whether to also invalidate child windows

### gdk_window_invalidate_region ()

    void                gdk_window_invalidate_region        (GdkWindow *window,
                                                             GdkRegion *region,
                                                             gboolean invalidate_children);

Adds `region` to the update area for `window`. The update area is the region that needs to be redrawn, or "dirty region." The call `gdk_window_process_updates()` sends one or more expose events to the window, which together cover the entire update area. An application would normally redraw the contents of `window` in response to those expose events.

GDK will call `gdk_window_process_all_updates()` on your behalf whenever your program returns to the main loop and becomes idle, so normally there's no need to do that manually, you just need to invalidate regions that you know should be redrawn.

The `invalidate_children` parameter controls whether the region of each child window that intersects `region` will also be invalidated. If `FALSE`, then the update area for child windows will remain unaffected. See gdk_window_invalidate_maybe_recurse if you need fine grained control over which children are invalidated.

`window` : | a GdkWindow
`region` : | a GdkRegion
`invalidate_children` : | `TRUE` to also invalidate child windows

### gdk_window_invalidate_maybe_recurse ()

    void                gdk_window_invalidate_maybe_recurse (GdkWindow *window,
                                                             GdkRegion *region,
                                                             gboolean (*child_func) (GdkWindow *, gpointer),
                                                             gpointer user_data);

Adds `region` to the update area for `window`. The update area is the region that needs to be redrawn, or "dirty region." The call `gdk_window_process_updates()` sends one or more expose events to the window, which together cover the entire update area. An application would normally redraw the contents of `window` in response to those expose events.

GDK will call `gdk_window_process_all_updates()` on your behalf whenever your program returns to the main loop and becomes idle, so normally there's no need to do that manually, you just need to invalidate regions that you know should be redrawn.

The `child_func` parameter controls whether the region of each child window that intersects `region` will also be invalidated. Only children for which `child_func` returns TRUE will have the area invalidated.

`window` : | a GdkWindow
`region` : | a GdkRegion
`child_func` : | function to use to decide if to recurse to a child, `NULL` means never recurse.
`user_data` : | data passed to `child_func`

### gdk_window_get_update_area ()

    GdkRegion*          gdk_window_get_update_area          (GdkWindow *window);

Transfers ownership of the update area from `window` to the caller of the function. That is, after calling this function, `window` will no longer have an invalid/dirty region; the update area is removed from `window` and handed to you. If a window has no update area, `gdk_window_get_update_area()` returns `NULL`. You are responsible for calling `gdk_region_destroy()` on the returned region if it's non-`NULL`.

`window` : | a GdkWindow
Returns : | the update area for `window`

### gdk_window_freeze_updates ()

    void                gdk_window_freeze_updates           (GdkWindow *window);

Temporarily freezes a window such that it won't receive expose events. The window will begin receiving expose events again when `gdk_window_thaw_updates()` is called. If `gdk_window_freeze_updates()` has been called more than once, `gdk_window_thaw_updates()` must be called an equal number of times to begin processing exposes.

`window` : | a GdkWindow

### gdk_window_thaw_updates ()

    void                gdk_window_thaw_updates             (GdkWindow *window);

Thaws a window frozen with `gdk_window_freeze_updates()`.

`window` : | a GdkWindow

### gdk_window_process_all_updates ()

    void                gdk_window_process_all_updates      (void);

Calls `gdk_window_process_updates()` for all windows (see GdkWindow) in the application.

### gdk_window_process_updates ()

    void                gdk_window_process_updates          (GdkWindow *window,
                                                             gboolean update_children);

Sends one or more expose events to `window`. The areas in each expose event will cover the entire update area for the window (see `gdk_window_invalidate_region()` for details). Normally GDK calls `gdk_window_process_all_updates()` on your behalf, so there's no need to call this function unless you want to force expose events to be delivered immediately and synchronously (vs. the usual case, where GDK delivers them in an idle handler). Occasionally this is useful to produce nicer scrolling behavior, for example.

`window` : | a GdkWindow
`update_children` : | whether to also process updates for child windows

### gdk_window_set_debug_updates ()

    void                gdk_window_set_debug_updates        (gboolean setting);

With update debugging enabled, calls to `gdk_window_invalidate_region()` clear the invalidated region of the screen to a noticeable color, and GDK pauses for a short time before sending exposes to windows during `gdk_window_process_updates()`. The net effect is that you can see the invalid region for each window and watch redraws as they occur. This allows you to diagnose inefficiencies in your application.

In essence, because the GDK rendering model prevents all flicker, if you are redrawing the same region 400 times you may never notice, aside from noticing a speed problem. Enabling update debugging causes GTK to flicker slowly and noticeably, so you can see exactly what's being redrawn when, in what order.

The --gtk-debug=updates command line option passed to GTK+ programs enables this debug option at application startup time. That's usually more useful than calling `gdk_window_set_debug_updates()` yourself, though you might want to use this function to enable updates sometime after application startup time.

`setting` : | `TRUE` to turn on update debugging

### gdk_window_get_internal_paint_info ()

    void                gdk_window_get_internal_paint_info  (GdkWindow *window,
                                                             GdkDrawable **real_drawable,
                                                             gint *x_offset,
                                                             gint *y_offset);

If you bypass the GDK layer and use windowing system primitives to draw directly onto a GdkWindow, then you need to deal with two details: there may be an offset between GDK coordinates and windowing system coordinates, and GDK may have redirected drawing to a offscreen pixmap as the result of a `gdk_window_begin_paint_region()` calls. This function allows retrieving the information you need to compensate for these effects.

This function exposes details of the GDK implementation, and is thus likely to change in future releases of GDK.

`window` : | a GdkWindow
`real_drawable` : | location to store the drawable to which drawing should be done.
`x_offset` : | location to store the X offset between coordinates in `window`, and the underlying window system primitive coordinates for *`real_drawable`.
`y_offset` : | location to store the Y offset between coordinates in `window`, and the underlying window system primitive coordinates for *`real_drawable`.

### gdk_window_enable_synchronized_configure ()

    void                gdk_window_enable_synchronized_configure
                                                            (GdkWindow *window);

Indicates that the application will cooperate with the window system in synchronizing the window repaint with the window manager during resizing operations. After an application calls this function, it must call `gdk_window_configure_finished()` every time it has finished all processing associated with a set of Configure events. Toplevel GTK+ windows automatically use this protocol.

On X, calling this function makes `window` participate in the _NET_WM_SYNC_REQUEST window manager protocol.

`window` : | a toplevel GdkWindow

Since 2.6

### gdk_window_configure_finished ()

    void                gdk_window_configure_finished       (GdkWindow *window);

Signal to the window system that the application has finished handling Configure events it has received. Window Managers can use this to better synchronize the frame repaint with the application. GTK+ applications will automatically call this function when appropriate.

This function can only be called if `gdk_window_enable_synchronized_configure()` was called previously.

`window` : | a toplevel GdkWindow

Since 2.6

### gdk_window_set_user_data ()

    void                gdk_window_set_user_data            (GdkWindow *window,
                                                             gpointer user_data);

For most purposes this function is deprecated in favor of `g_object_set_data()`. However, for historical reasons GTK+ stores the GtkWidget that owns a GdkWindow as user data on the GdkWindow. So, custom widget implementations should use this function for that. If GTK+ receives an event for a GdkWindow, and the user data for the window is non-`NULL`, GTK+ will assume the user data is a GtkWidget, and forward the event to that widget.

`window` : | a GdkWindow
`user_data` : | user data

### gdk_window_set_override_redirect ()

    void                gdk_window_set_override_redirect    (GdkWindow *window,
                                                             gboolean override_redirect);

An override redirect window is not under the control of the window manager. This means it won't have a titlebar, won't be minimizable, etc. - it will be entirely under the control of the application. The window manager can't see the override redirect window at all.

Override redirect should only be used for short-lived temporary windows, such as popup menus. GtkMenu uses an override redirect window in its implementation, for example.

`window` : | a toplevel GdkWindow
`override_redirect` : | `TRUE` if window should be override redirect

### gdk_window_set_accept_focus ()

    void                gdk_window_set_accept_focus         (GdkWindow *window,
                                                             gboolean accept_focus);

Setting `accept_focus` to `FALSE` hints the desktop environment that the window doesn't want to receive input focus.

On X, it is the responsibility of the window manager to interpret this hint. ICCCM-compliant window manager usually respect it.

`window` : | a toplevel GdkWindow
`accept_focus` : | `TRUE` if the window should receive input focus

Since 2.4

### gdk_window_set_focus_on_map ()

    void                gdk_window_set_focus_on_map         (GdkWindow *window,
                                                             gboolean focus_on_map);

Setting `focus_on_map` to `FALSE` hints the desktop environment that the window doesn't want to receive input focus when it is mapped. focus_on_map should be turned off for windows that aren't triggered interactively (such as popups from network activity).

On X, it is the responsibility of the window manager to interpret this hint. Window managers following the freedesktop.org window manager extension specification should respect it.

`window` : | a toplevel GdkWindow
`focus_on_map` : | `TRUE` if the window should receive input focus when mapped

Since 2.6

### gdk_window_add_filter ()

    void                gdk_window_add_filter               (GdkWindow *window,
                                                             GdkFilterFunc function,
                                                             gpointer data);

Adds an event filter to `window`, allowing you to intercept events before they reach GDK. This is a low-level operation and makes it easy to break GDK and/or GTK+, so you have to know what you're doing. Pass `NULL` for `window` to get all events for all windows, instead of events for a specific window.

See `gdk_display_add_client_message_filter()` if you are interested in X ClientMessage events.

`window` : | a GdkWindow
`function` : | filter callback
`data` : | data to pass to filter callback

### gdk_window_remove_filter ()

    void                gdk_window_remove_filter            (GdkWindow *window,
                                                             GdkFilterFunc function,
                                                             gpointer data);

Remove a filter previously added with `gdk_window_add_filter()`.

`window` : | a GdkWindow
`function` : | previously-added filter function
`data` : | user data for previously-added filter function

### GdkFilterFunc ()

    GdkFilterReturn     (*GdkFilterFunc)                    (GdkXEvent *xevent,
                                                             GdkEvent *event,
                                                             gpointer data);

Specifies the type of function used to filter native events before they are converted to GDK events.

When a filter is called, `event` is unpopulated, except for `event->window`. The filter may translate the native event to a GDK event and store the result in `event`, or handle it without translation. If the filter translates the event and processing should continue, it should return `GDK_FILTER_TRANSLATE`.

`xevent` : | the native event to filter.
`event` : | the GDK event to which the X event will be translated.
`data` : | user data set when the filter was installed.
Returns : | a GdkFilterReturn value.

### enum GdkFilterReturn

    typedef enum {
      GDK_FILTER_CONTINUE,	  /* Event not handled, continue processesing */
      GDK_FILTER_TRANSLATE,	  /* Native event translated into a GDK event and
                                 stored in the "event" structure that was
                                 passed in */
      GDK_FILTER_REMOVE	  /* Terminate processing, removing event */
    } GdkFilterReturn;

Specifies the result of applying a GdkFilterFunc to a native event.

`GDK_FILTER_CONTINUE` | event not handled, continue processing.
`GDK_FILTER_TRANSLATE` | native event translated into a GDK event and stored in the `event` structure that was passed in.
`GDK_FILTER_REMOVE` | event handled, terminate processing.

### GdkXEvent

    typedef void GdkXEvent;	  /* Can be cast to window system specific

Used to represent native events (XEvents for the X11 backend, MSGs for Win32).

### gdk_window_shape_combine_mask ()

    void                gdk_window_shape_combine_mask       (GdkWindow *window,
                                                             GdkBitmap *mask,
                                                             gint x,
                                                             gint y);

Applies a shape mask to `window`. Pixels in `window` corresponding to set bits in the `mask` will be visible; pixels in `window` corresponding to unset bits in the `mask` will be transparent. This gives a non-rectangular window.

If `mask` is `NULL`, the shape mask will be unset, and the `x`/`y` parameters are not used.

On the X11 platform, this uses an X server extension which is widely available on most common platforms, but not available on very old X servers, and occasionally the implementation will be buggy. On servers without the shape extension, this function will do nothing.

On the Win32 platform the functionality is always present.

This function works on both toplevel and child windows.

`window` : | a GdkWindow
`mask` : | shape mask
`x` : | X position of shape mask with respect to `window`
`y` : | Y position of shape mask with respect to `window`

### gdk_window_shape_combine_region ()

    void                gdk_window_shape_combine_region     (GdkWindow *window,
                                                             GdkRegion *shape_region,
                                                             gint offset_x,
                                                             gint offset_y);

Makes pixels in `window` outside `shape_region` be transparent, so that the window may be nonrectangular. See also `gdk_window_shape_combine_mask()` to use a bitmap as the mask.

If `shape_region` is `NULL`, the shape will be unset, so the whole window will be opaque again. `offset_x` and `offset_y` are ignored if `shape_region` is `NULL`.

On the X11 platform, this uses an X server extension which is widely available on most common platforms, but not available on very old X servers, and occasionally the implementation will be buggy. On servers without the shape extension, this function will do nothing.

On the Win32 platform, this functionality is always present.

This function works on both toplevel and child windows.

`window` : | a GdkWindow
`shape_region` : | region of window to be non-transparent
`offset_x` : | X position of `shape_region` in `window` coordinates
`offset_y` : | Y position of `shape_region` in `window` coordinates

### gdk_window_set_child_shapes ()

    void                gdk_window_set_child_shapes         (GdkWindow *window);

Sets the shape mask of `window` to the union of shape masks for all children of `window`, ignoring the shape mask of `window` itself. Contrast with `gdk_window_merge_child_shapes()` which includes the shape mask of `window` in the masks to be merged.

`window` : | a GdkWindow

### gdk_window_merge_child_shapes ()

    void                gdk_window_merge_child_shapes       (GdkWindow *window);

Merges the shape masks for any child windows into the shape mask for `window`. i.e. the union of all masks for `window` and its children will become the new mask for `window`. See `gdk_window_shape_combine_mask()`.

This function is distinct from `gdk_window_set_child_shapes()` because it includes `window`'s shape mask in the set of shapes to be merged.

`window` : | a GdkWindow

### gdk_window_input_shape_combine_mask ()

    void                gdk_window_input_shape_combine_mask (GdkWindow *window,
                                                             GdkBitmap *mask,
                                                             gint x,
                                                             gint y);

Like `gdk_window_shape_combine_mask()`, but the shape applies only to event handling. Mouse events which happen while the pointer position corresponds to an unset bit in the mask will be passed on the window below `window`.

An input shape is typically used with RGBA windows. The alpha channel of the window defines which pixels are invisible and allows for nicely antialiased borders, and the input shape controls where the window is "clickable".

On the X11 platform, this requires version 1.1 of the shape extension.

On the Win32 platform, this functionality is not present and the function does nothing.

`window` : | a GdkWindow
`mask` : | shape mask
`x` : | X position of shape mask with respect to `window`
`y` : | Y position of shape mask with respect to `window`

Since 2.10

### gdk_window_input_shape_combine_region ()

    void                gdk_window_input_shape_combine_region
                                                            (GdkWindow *window,
                                                             GdkRegion *shape_region,
                                                             gint offset_x,
                                                             gint offset_y);

Like `gdk_window_shape_combine_region()`, but the shape applies only to event handling. Mouse events which happen while the pointer position corresponds to an unset bit in the mask will be passed on the window below `window`.

An input shape is typically used with RGBA windows. The alpha channel of the window defines which pixels are invisible and allows for nicely antialiased borders, and the input shape controls where the window is "clickable".

On the X11 platform, this requires version 1.1 of the shape extension.

On the Win32 platform, this functionality is not present and the function does nothing.

`window` : | a GdkWindow
`shape_region` : | region of window to be non-transparent
`offset_x` : | X position of `shape_region` in `window` coordinates
`offset_y` : | Y position of `shape_region` in `window` coordinates

Since 2.10

### gdk_window_set_child_input_shapes ()

    void                gdk_window_set_child_input_shapes   (GdkWindow *window);

Sets the input shape mask of `window` to the union of input shape masks for all children of `window`, ignoring the input shape mask of `window` itself. Contrast with `gdk_window_merge_child_input_shapes()` which includes the input shape mask of `window` in the masks to be merged.

`window` : | a GdkWindow

Since 2.10

### gdk_window_merge_child_input_shapes ()

    void                gdk_window_merge_child_input_shapes (GdkWindow *window);

Merges the input shape masks for any child windows into the input shape mask for `window`. i.e. the union of all input masks for `window` and its children will become the new input mask for `window`. See `gdk_window_input_shape_combine_mask()`.

This function is distinct from `gdk_window_set_child_input_shapes()` because it includes `window`'s input shape mask in the set of shapes to be merged.

`window` : | a GdkWindow

Since 2.10

### gdk_window_set_static_gravities ()

    gboolean            gdk_window_set_static_gravities     (GdkWindow *window,
                                                             gboolean use_static);

Set the bit gravity of the given window to static, and flag it so all children get static subwindow gravity. This is used if you are implementing scary features that involve deep knowledge of the windowing system. Don't worry about it unless you have to.

`window` : | a GdkWindow
`use_static` : | `TRUE` to turn on static gravity
Returns : | `TRUE` if the server supports static gravity

### gdk_window_set_hints ()

    void                gdk_window_set_hints                (GdkWindow *window,
                                                             gint x,
                                                             gint y,
                                                             gint min_width,
                                                             gint min_height,
                                                             gint max_width,
                                                             gint max_height,
                                                             gint flags);

### Warning

`gdk_window_set_hints` is deprecated and should not be used in newly-written code.

This function is broken and useless and you should ignore it. If using GTK+, use functions such as `gtk_window_resize()`, `gtk_window_set_size_request()`, `gtk_window_move()`, `gtk_window_parse_geometry()`, and `gtk_window_set_geometry_hints()`, depending on what you're trying to do.

If using GDK directly, use `gdk_window_set_geometry_hints()`.

`window` : | a GdkWindow
`x` : | ignored field, does not matter
`y` : | ignored field, does not matter
`min_width` : | minimum width hint
`min_height` : | minimum height hint
`max_width` : | max width hint
`max_height` : | max height hint
`flags` : | logical OR of GDK_HINT_POS, GDK_HINT_MIN_SIZE, and/or GDK_HINT_MAX_SIZE

### gdk_window_set_title ()

    void                gdk_window_set_title                (GdkWindow *window,
                                                             const gchar *title);

Sets the title of a toplevel window, to be displayed in the titlebar. If you haven't explicitly set the icon name for the window (using `gdk_window_set_icon_name()`), the icon name will be set to `title` as well. `title` must be in UTF-8 encoding (as with all user-readable strings in GDK/GTK+). `title` may not be `NULL`.

`window` : | a toplevel GdkWindow
`title` : | title of `window`

### gdk_window_set_background ()

    void                gdk_window_set_background           (GdkWindow *window,
                                                             const GdkColor *color);

Sets the background color of `window`. (However, when using GTK+, set the background of a widget with `gtk_widget_modify_bg()` - if you're an application - or `gtk_style_set_background()` - if you're implementing a custom widget.)

The `color` must be allocated; `gdk_rgb_find_color()` is the best way to allocate a color.

See also `gdk_window_set_back_pixmap()`.

`window` : | a GdkWindow
`color` : | an allocated GdkColor

### gdk_window_set_back_pixmap ()

    void                gdk_window_set_back_pixmap          (GdkWindow *window,
                                                             GdkPixmap *pixmap,
                                                             gboolean parent_relative);

Sets the background pixmap of `window`. May also be used to set a background of "None" on `window`, by setting a background pixmap of `NULL`. A background pixmap will be tiled, positioning the first tile at the origin of `window`, or if `parent_relative` is `TRUE`, the tiling will be done based on the origin of the parent window (useful to align tiles in a parent with tiles in a child).

A background pixmap of `NULL` means that the window will have no background. A window with no background will never have its background filled by the windowing system, instead the window will contain whatever pixels were already in the corresponding area of the display.

The windowing system will normally fill a window with its background when the window is obscured then exposed, and when you call `gdk_window_clear()`.

`window` : | a GdkWindow
`pixmap` : | a GdkPixmap, or `NULL`
`parent_relative` : | whether the tiling origin is at the origin of `window`'s parent

### GDK_PARENT_RELATIVE

    #define GDK_PARENT_RELATIVE  1L

A special value for `GdkPixmap*` variables, indicating that the background pixmap for a window should be inherited from the parent window.

### gdk_window_set_cursor ()

    void                gdk_window_set_cursor               (GdkWindow *window,
                                                             GdkCursor *cursor);

Sets the mouse pointer for a GdkWindow. Use `gdk_cursor_new()` or `gdk_cursor_new_from_pixmap()` to create the cursor. To make the cursor invisible, use `gdk_cursor_new_from_pixmap()` to create a cursor with no pixels in it. Passing `NULL` for the `cursor` argument to `gdk_window_set_cursor()` means that `window` will use the cursor of its parent window. Most windows should use this default.

`window` : | a GdkWindow
`cursor` : | a cursor

### gdk_window_set_colormap

    #define gdk_window_set_colormap        gdk_drawable_set_colormap

### Warning

`gdk_window_set_colormap` is deprecated and should not be used in newly-written code.

Deprecated equivalent to `gdk_drawable_set_colormap()`

### gdk_window_get_user_data ()

    void                gdk_window_get_user_data            (GdkWindow *window,
                                                             gpointer *data);

Retrieves the user data for `window`, which is normally the widget that `window` belongs to. See `gdk_window_set_user_data()`.

`window` : | a GdkWindow
`data` : | return location for user data

### gdk_window_get_geometry ()

    void                gdk_window_get_geometry             (GdkWindow *window,
                                                             gint *x,
                                                             gint *y,
                                                             gint *width,
                                                             gint *height,
                                                             gint *depth);

Any of the return location arguments to this function may be `NULL`, if you aren't interested in getting the value of that field.

The X and Y coordinates returned are relative to the parent window of `window`, which for toplevels usually means relative to the window decorations (titlebar, etc.) rather than relative to the root window (screen-size background window).

On the X11 platform, the geometry is obtained from the X server, so reflects the latest position of `window`; this may be out-of-sync with the position of `window` delivered in the most-recently-processed GdkEventConfigure. `gdk_window_get_position()` in contrast gets the position from the most recent configure event.

### Note

If `window` is not a toplevel, it is much better to call `gdk_window_get_position()` and `gdk_drawable_get_size()` instead, because it avoids the roundtrip to the X server and because `gdk_drawable_get_size()` supports the full 32-bit coordinate space, whereas `gdk_window_get_geometry()` is restricted to the 16-bit coordinates of X11.

`window` : | a GdkWindow
`x` : | return location for X coordinate of window (relative to its parent)
`y` : | return location for Y coordinate of window (relative to its parent)
`width` : | return location for width of window
`height` : | return location for height of window
`depth` : | return location for bit depth of window

### gdk_window_set_geometry_hints ()

    void                gdk_window_set_geometry_hints       (GdkWindow *window,
                                                             GdkGeometry *geometry,
                                                             GdkWindowHints geom_mask);

Sets the geometry hints for `window`. Hints flagged in `geom_mask` are set, hints not flagged in `geom_mask` are unset. To unset all hints, use a `geom_mask` of 0 and a `geometry` of `NULL`.

This function provides hints to the windowing system about acceptable sizes for a toplevel window. The purpose of this is to constrain user resizing, but the windowing system will typically (but is not required to) also constrain the current size of the window to the provided values and constrain programatic resizing via `gdk_window_resize()` or `gdk_window_move_resize()`.

Note that on X11, this effect has no effect on windows of type `GDK_WINDOW_TEMP` or windows where override redirect has been turned on via `gdk_window_set_override_redirect()` since these windows are not resizable by the user.

Since you can't count on the windowing system doing the constraints for programmatic resizes, you should generally call `gdk_window_constrain_size()` yourself to determine appropriate sizes.

`window` : | a toplevel GdkWindow
`geometry` : | geometry hints
`geom_mask` : | bitmask indicating fields of `geometry` to pay attention to

### gdk_window_set_icon_list ()

    void                gdk_window_set_icon_list            (GdkWindow *window,
                                                             GList *pixbufs);

Sets a list of icons for the window. One of these will be used to represent the window when it has been iconified. The icon is usually shown in an icon box or some sort of task bar. Which icon size is shown depends on the window manager. The window manager can scale the icon but setting several size icons can give better image quality since the window manager may only need to scale the icon by a small amount or not at all.

`window` : | The GdkWindow toplevel window to set the icon of.
`pixbufs` : | A list of pixbufs, of different sizes.

### gdk_window_set_modal_hint ()

    void                gdk_window_set_modal_hint           (GdkWindow *window,
                                                             gboolean modal);

The application can use this hint to tell the window manager that a certain window has modal behaviour. The window manager can use this information to handle modal windows in a special way.

You should only use this on windows for which you have previously called `gdk_window_set_transient_for()`

`window` : | A toplevel GdkWindow
`modal` : | `TRUE` if the window is modal, `FALSE` otherwise.

### gdk_window_set_type_hint ()

    void                gdk_window_set_type_hint            (GdkWindow *window,
                                                             GdkWindowTypeHint hint);

The application can use this call to provide a hint to the window manager about the functionality of a window. The window manager can use this information when determining the decoration and behaviour of the window.

The hint must be set before the window is mapped.

`window` : | A toplevel GdkWindow
`hint` : | A hint of the function this window will have

### gdk_window_get_type_hint ()

    GdkWindowTypeHint   gdk_window_get_type_hint            (GdkWindow *window);

This function returns the type hint set for a window.

`window` : | A toplevel GdkWindow
Returns : | The type hint set for `window`

Since 2.10

### gdk_window_set_skip_taskbar_hint ()

    void                gdk_window_set_skip_taskbar_hint    (GdkWindow *window,
                                                             gboolean skips_taskbar);

Toggles whether a window should appear in a task list or window list. If a window's semantic type as specified with `gdk_window_set_type_hint()` already fully describes the window, this function should not be called in addition, instead you should allow the window to be treated according to standard policy for its semantic type.

`window` : | a toplevel GdkWindow
`skips_taskbar` : | `TRUE` to skip the taskbar

Since 2.2

### gdk_window_set_skip_pager_hint ()

    void                gdk_window_set_skip_pager_hint      (GdkWindow *window,
                                                             gboolean skips_pager);

Toggles whether a window should appear in a pager (workspace switcher, or other desktop utility program that displays a small thumbnail representation of the windows on the desktop). If a window's semantic type as specified with `gdk_window_set_type_hint()` already fully describes the window, this function should not be called in addition, instead you should allow the window to be treated according to standard policy for its semantic type.

`window` : | a toplevel GdkWindow
`skips_pager` : | `TRUE` to skip the pager

Since 2.2

### gdk_window_set_urgency_hint ()

    void                gdk_window_set_urgency_hint         (GdkWindow *window,
                                                             gboolean urgent);

Toggles whether a window needs the user's urgent attention.

`window` : | a toplevel GdkWindow
`urgent` : | `TRUE` if the window is urgent

Since 2.8

### gdk_window_get_position ()

    void                gdk_window_get_position             (GdkWindow *window,
                                                             gint *x,
                                                             gint *y);

Obtains the position of the window as reported in the most-recently-processed GdkEventConfigure. Contrast with `gdk_window_get_geometry()` which queries the X server for the current window position, regardless of which events have been received or processed.

The position coordinates are relative to the window's parent window.

`window` : | a GdkWindow
`x` : | X coordinate of window
`y` : | Y coordinate of window

### gdk_window_get_root_origin ()

    void                gdk_window_get_root_origin          (GdkWindow *window,
                                                             gint *x,
                                                             gint *y);

Obtains the top-left corner of the window manager frame in root window coordinates.

`window` : | a toplevel GdkWindow
`x` : | return location for X position of window frame
`y` : | return location for Y position of window frame

### gdk_window_get_frame_extents ()

    void                gdk_window_get_frame_extents        (GdkWindow *window,
                                                             GdkRectangle *rect);

Obtains the bounding box of the window, including window manager titlebar/borders if any. The frame position is given in root window coordinates. To get the position of the window itself (rather than the frame) in root window coordinates, use `gdk_window_get_origin()`.

`window` : | a GdkWindow
`rect` : | rectangle to fill with bounding box of the window frame

### gdk_window_get_size

    #define gdk_window_get_size            gdk_drawable_get_size

### Warning

`gdk_window_get_size` is deprecated and should not be used in newly-written code.

Deprecated equivalent of `gdk_drawable_get_size()`.

### gdk_window_get_visual

    #define gdk_window_get_visual          gdk_drawable_get_visual

### Warning

`gdk_window_get_visual` is deprecated and should not be used in newly-written code.

Deprecated equivalent of `gdk_drawable_get_visual()`.

Returns : | the GdkVisual of the window

### gdk_window_get_colormap

    #define gdk_window_get_colormap        gdk_drawable_get_colormap

### Warning

`gdk_window_get_colormap` is deprecated and should not be used in newly-written code.

Deprecated equivalent of `gdk_drawable_get_colormap()`.

Returns : | colormap for the window

### gdk_window_get_type

    #define gdk_window_get_type            gdk_window_get_window_type

### Warning

`gdk_window_get_type` is deprecated and should not be used in newly-written code.

Deprecated equivalent of `gdk_drawable_get_type()`.

Returns : | type of drawable

### gdk_window_get_origin ()

    gint                gdk_window_get_origin               (GdkWindow *window,
                                                             gint *x,
                                                             gint *y);

Obtains the position of a window in root window coordinates. (Compare with `gdk_window_get_position()` and `gdk_window_get_geometry()` which return the position of a window relative to its parent window.)

`window` : | a GdkWindow
`x` : | return location for X coordinate
`y` : | return location for Y coordinate
Returns : | not meaningful, ignore

### gdk_window_get_deskrelative_origin ()

    gboolean            gdk_window_get_deskrelative_origin  (GdkWindow *window,
                                                             gint *x,
                                                             gint *y);

### Warning

`gdk_window_get_deskrelative_origin` is deprecated and should not be used in newly-written code.

This gets the origin of a GdkWindow relative to an Enlightenment-window-manager desktop. As long as you don't assume that the user's desktop/workspace covers the entire root window (i.e. you don't assume that the desktop begins at root window coordinate 0,0) this function is not necessary. It's deprecated for that reason.

`window` : | a toplevel GdkWindow
`x` : | return location for X coordinate
`y` : | return location for Y coordinate
Returns : | not meaningful

### gdk_window_get_pointer ()

    GdkWindow*          gdk_window_get_pointer              (GdkWindow *window,
                                                             gint *x,
                                                             gint *y,
                                                             GdkModifierType *mask);

Obtains the current pointer position and modifier state. The position is given in coordinates relative to the upper left corner of `window`.

`window` : | a GdkWindow
`x` : | return location for X coordinate of pointer or `NULL` to not return the X coordinate
`y` : | return location for Y coordinate of pointer or `NULL` to not return the Y coordinate
`mask` : | return location for modifier mask or `NULL` to not return the modifier mask
Returns : | the window containing the pointer (as with `gdk_window_at_pointer()`), or `NULL` if the window containing the pointer isn't known to GDK

### enum GdkModifierType

    typedef enum
    {
      GDK_SHIFT_MASK    = 1 << 0,
      GDK_LOCK_MASK	    = 1 << 1,
      GDK_CONTROL_MASK  = 1 << 2,
      GDK_MOD1_MASK	    = 1 << 3,
      GDK_MOD2_MASK	    = 1 << 4,
      GDK_MOD3_MASK	    = 1 << 5,
      GDK_MOD4_MASK	    = 1 << 6,
      GDK_MOD5_MASK	    = 1 << 7,
      GDK_BUTTON1_MASK  = 1 << 8,
      GDK_BUTTON2_MASK  = 1 << 9,
      GDK_BUTTON3_MASK  = 1 << 10,
      GDK_BUTTON4_MASK  = 1 << 11,
      GDK_BUTTON5_MASK  = 1 << 12,

      /* The next few modifiers are used by XKB, so we skip to the end.
       * Bits 15 - 25 are currently unused. Bit 29 is used internally.
       */

      GDK_SUPER_MASK    = 1 << 26,
      GDK_HYPER_MASK    = 1 << 27,
      GDK_META_MASK     = 1 << 28,

      GDK_RELEASE_MASK  = 1 << 30,

      GDK_MODIFIER_MASK = 0x5c001fff
    } GdkModifierType;

A set of bit-flags to indicate the state of modifier keys and mouse buttons in various event types. Typical modifier keys are Shift, Control, Meta, Super, Hyper, Alt, Compose, Apple, CapsLock or ShiftLock.

Like the X Window System, GDK supports 8 modifier keys and 5 mouse buttons.

Since 2.10, GDK recognizes which of the Meta, Super or Hyper keys are mapped to Mod2 - Mod5, and indicates this by setting `GDK_SUPER_MASK`, `GDK_HYPER_MASK` or `GDK_META_MASK` in the state field of key events.

`GDK_SHIFT_MASK` | the Shift key.
`GDK_LOCK_MASK` | a Lock key (depending on the modifier mapping of the X server this may either be CapsLock or ShiftLock).
`GDK_CONTROL_MASK` | the Control key.
`GDK_MOD1_MASK` | the fourth modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier, but normally it is the Alt key).
`GDK_MOD2_MASK` | the fifth modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier).
`GDK_MOD3_MASK` | the sixth modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier).
`GDK_MOD4_MASK` | the seventh modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier).
`GDK_MOD5_MASK` | the eighth modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier).
`GDK_BUTTON1_MASK` | the first mouse button.
`GDK_BUTTON2_MASK` | the second mouse button.
`GDK_BUTTON3_MASK` | the third mouse button.
`GDK_BUTTON4_MASK` | the fourth mouse button.
`GDK_BUTTON5_MASK` | the fifth mouse button.
`GDK_SUPER_MASK` | the Super modifier. Since 2.10
`GDK_HYPER_MASK` | the Hyper modifier. Since 2.10
`GDK_META_MASK` | the Meta modifier. Since 2.10
`GDK_RELEASE_MASK` | not used in GDK itself. GTK+ uses it to differentiate between (keyval, modifiers) pairs from key press and release events.
`GDK_MODIFIER_MASK` | a mask covering all modifier types.

### gdk_window_get_parent ()

    GdkWindow*          gdk_window_get_parent               (GdkWindow *window);

Obtains the parent of `window`, as known to GDK. Does not query the X server; thus this returns the parent as passed to `gdk_window_new()`, not the actual parent. This should never matter unless you're using Xlib calls mixed with GDK calls on the X11 platform. It may also matter for toplevel windows, because the window manager may choose to reparent them.

`window` : | a GdkWindow
Returns : | parent of `window`

### gdk_window_get_toplevel ()

    GdkWindow*          gdk_window_get_toplevel             (GdkWindow *window);

Gets the toplevel window that's an ancestor of `window`.

`window` : | a GdkWindow
Returns : | the toplevel window containing `window`

### gdk_window_get_children ()

    GList*              gdk_window_get_children             (GdkWindow *window);

Gets the list of children of `window` known to GDK. This function only returns children created via GDK, so for example it's useless when used with the root window; it only returns windows an application created itself.

The returned list must be freed, but the elements in the list need not be.

`window` : | a GdkWindow
Returns : | list of child windows inside `window`

### gdk_window_peek_children ()

    GList*              gdk_window_peek_children            (GdkWindow *window);

Like `gdk_window_get_children()`, but does not copy the list of children, so the list does not need to be freed.

`window` : | a GdkWindow
Returns : | a reference to the list of child windows in `window`

### gdk_window_get_events ()

    GdkEventMask        gdk_window_get_events               (GdkWindow *window);

Gets the event mask for `window`. See `gdk_window_set_events()`.

`window` : | a GdkWindow
Returns : | event mask for `window`

### gdk_window_set_events ()

    void                gdk_window_set_events               (GdkWindow *window,
                                                             GdkEventMask event_mask);

The event mask for a window determines which events will be reported for that window. For example, an event mask including GDK_BUTTON_PRESS_MASK means the window should report button press events. The event mask is the bitwise OR of values from the GdkEventMask enumeration.

`window` : | a GdkWindow
`event_mask` : | event mask for `window`

### gdk_window_set_icon ()

    void                gdk_window_set_icon                 (GdkWindow *window,
                                                             GdkWindow *icon_window,
                                                             GdkPixmap *pixmap,
                                                             GdkBitmap *mask);

Sets the icon of `window` as a pixmap or window. If using GTK+, investigate `gtk_window_set_default_icon_list()` first, and then `gtk_window_set_icon_list()` and `gtk_window_set_icon()`. If those don't meet your needs, look at `gdk_window_set_icon_list()`. Only if all those are too high-level do you want to fall back to `gdk_window_set_icon()`.

`window` : | a toplevel GdkWindow
`icon_window` : | a GdkWindow to use for the icon, or `NULL` to unset
`pixmap` : | a GdkPixmap to use as the icon, or `NULL` to unset
`mask` : | a 1-bit pixmap (GdkBitmap) to use as mask for `pixmap`, or `NULL` to have none

### gdk_window_set_icon_name ()

    void                gdk_window_set_icon_name            (GdkWindow *window,
                                                             const gchar *name);

Windows may have a name used while minimized, distinct from the name they display in their titlebar. Most of the time this is a bad idea from a user interface standpoint. But you can set such a name with this function, if you like.

`window` : | a toplevel GdkWindow
`name` : | name of window while iconified (minimized)

### gdk_window_set_transient_for ()

    void                gdk_window_set_transient_for        (GdkWindow *window,
                                                             GdkWindow *parent);

Indicates to the window manager that `window` is a transient dialog associated with the application window `parent`. This allows the window manager to do things like center `window` on `parent` and keep `window` above `parent`.

See `gtk_window_set_transient_for()` if you're using GtkWindow or GtkDialog.

`window` : | a toplevel GdkWindow
`parent` : | another toplevel GdkWindow

### gdk_window_set_role ()

    void                gdk_window_set_role                 (GdkWindow *window,
                                                             const gchar *role);

When using GTK+, typically you should use `gtk_window_set_role()` instead of this low-level function.

The window manager and session manager use a window's role to distinguish it from other kinds of window in the same application. When an application is restarted after being saved in a previous session, all windows with the same title and role are treated as interchangeable. So if you have two windows with the same title that should be distinguished for session management purposes, you should set the role on those windows. It doesn't matter what string you use for the role, as long as you have a different role for each non-interchangeable kind of window.

`window` : | a toplevel GdkWindow
`role` : | a string indicating its role

### gdk_window_set_startup_id ()

    void                gdk_window_set_startup_id           (GdkWindow *window,
                                                             const gchar *startup_id);

When using GTK+, typically you should use `gtk_window_set_startup_id()` instead of this low-level function.

`window` : | a toplevel GdkWindow
`startup_id` : | a string with startup-notification identifier

Since 2.12

### gdk_window_set_group ()

    void                gdk_window_set_group                (GdkWindow *window,
                                                             GdkWindow *leader);

Sets the group leader window for `window`. By default, GDK sets the group leader for all toplevel windows to a global window implicitly created by GDK. With this function you can override this default.

The group leader window allows the window manager to distinguish all windows that belong to a single application. It may for example allow users to minimize/unminimize all windows belonging to an application at once. You should only set a non-default group window if your application pretends to be multiple applications.

`window` : | a toplevel GdkWindow
`leader` : | group leader window, or `NULL` to restore the default group leader window

### gdk_window_get_group ()

    GdkWindow*          gdk_window_get_group                (GdkWindow *window);

Returns the group leader window for `window`. See `gdk_window_set_group()`.

`window` : | a toplevel GdkWindow
Returns : | the group leader window for `window`

Since 2.4

### gdk_window_set_decorations ()

    void                gdk_window_set_decorations          (GdkWindow *window,
                                                             GdkWMDecoration decorations);

"Decorations" are the features the window manager adds to a toplevel GdkWindow. This function sets the traditional Motif window manager hints that tell the window manager which decorations you would like your window to have. Usually you should use `gtk_window_set_decorated()` on a GtkWindow instead of using the GDK function directly.

The `decorations` argument is the logical OR of the fields in the GdkWMDecoration enumeration. If GDK_DECOR_ALL is included in the mask, the other bits indicate which decorations should be turned off. If GDK_DECOR_ALL is not included, then the other bits indicate which decorations should be turned on.

Most window managers honor a decorations hint of 0 to disable all decorations, but very few honor all possible combinations of bits.

`window` : | a toplevel GdkWindow
`decorations` : | decoration hint mask

### gdk_window_get_decorations ()

    gboolean            gdk_window_get_decorations          (GdkWindow *window,
                                                             GdkWMDecoration *decorations);

Returns the decorations set on the GdkWindow with gdk_window_set_decorations

`window` : | The toplevel GdkWindow to get the decorations from
`decorations` : | The window decorations will be written here
Returns : | TRUE if the window has decorations set, FALSE otherwise.

### enum GdkWMDecoration

    typedef enum
    {
      GDK_DECOR_ALL		= 1 << 0,
      GDK_DECOR_BORDER	= 1 << 1,
      GDK_DECOR_RESIZEH	= 1 << 2,
      GDK_DECOR_TITLE	= 1 << 3,
      GDK_DECOR_MENU	= 1 << 4,
      GDK_DECOR_MINIMIZE	= 1 << 5,
      GDK_DECOR_MAXIMIZE	= 1 << 6
    } GdkWMDecoration;

These are hints originally defined by the Motif toolkit. The window manager can use them when determining how to decorate the window. The hint must be set before mapping the window.

`GDK_DECOR_ALL` | all decorations should be applied.
`GDK_DECOR_BORDER` | a frame should be drawn around the window.
`GDK_DECOR_RESIZEH` | the frame should have resize handles.
`GDK_DECOR_TITLE` | a titlebar should be placed above the window.
`GDK_DECOR_MENU` | a button for opening a menu should be included.
`GDK_DECOR_MINIMIZE` | a minimize button should be included.
`GDK_DECOR_MAXIMIZE` | a maximize button should be included.

### gdk_window_set_functions ()

    void                gdk_window_set_functions            (GdkWindow *window,
                                                             GdkWMFunction functions);

Sets hints about the window management functions to make available via buttons on the window frame.

On the X backend, this function sets the traditional Motif window manager hint for this purpose. However, few window managers do anything reliable or interesting with this hint. Many ignore it entirely.

The `functions` argument is the logical OR of values from the GdkWMFunction enumeration. If the bitmask includes GDK_FUNC_ALL, then the other bits indicate which functions to disable; if it doesn't include GDK_FUNC_ALL, it indicates which functions to enable.

`window` : | a toplevel GdkWindow
`functions` : | bitmask of operations to allow on `window`

### enum GdkWMFunction

    typedef enum
    {
      GDK_FUNC_ALL		= 1 << 0,
      GDK_FUNC_RESIZE	= 1 << 1,
      GDK_FUNC_MOVE		= 1 << 2,
      GDK_FUNC_MINIMIZE	= 1 << 3,
      GDK_FUNC_MAXIMIZE	= 1 << 4,
      GDK_FUNC_CLOSE	= 1 << 5
    } GdkWMFunction;

These are hints originally defined by the Motif toolkit. The window manager can use them when determining the functions to offer for the window. The hint must be set before mapping the window.

`GDK_FUNC_ALL` | all functions should be offered.
`GDK_FUNC_RESIZE` | the window should be resizable.
`GDK_FUNC_MOVE` | the window should be movable.
`GDK_FUNC_MINIMIZE` | the window should be minimizable.
`GDK_FUNC_MAXIMIZE` | the window should be maximizable.
`GDK_FUNC_CLOSE` | the window should be closable.

### gdk_window_get_toplevels ()

    GList*              gdk_window_get_toplevels            (void);

Obtains a list of all toplevel windows known to GDK on the default screen (see `gdk_screen_get_toplevel_windows()`). A toplevel window is a child of the root window (see `gdk_get_default_root_window()`).

The returned list should be freed with `g_list_free()`, but its elements need not be freed.

Returns : | list of toplevel windows, free with `g_list_free()`

### gdk_get_default_root_window ()

    GdkWindow*          gdk_get_default_root_window         (void);

Obtains the root window (parent all other windows are inside) for the default display and screen.

Returns : | the default root window

### GdkPointerHooks

    typedef struct {
      GdkWindow* (*get_pointer)       (GdkWindow	   *window,
    			           gint	           *x,
    			           gint   	   *y,
    			           GdkModifierType *mask);
      GdkWindow* (*window_at_pointer) (GdkScreen       *screen, /* unused */
                                       gint            *win_x,
                                       gint            *win_y);
    } GdkPointerHooks;

A table of pointers to functions for getting quantities related to the current pointer position. GDK has one global table of this type, which can be set using `gdk_set_pointer_hooks()`.

This is only useful for such low-level tools as an event recorder. Applications should never have any reason to use this facility

`get_pointer` () | Obtains the current pointer position and modifier state. The position is given in coordinates relative to the window containing the pointer, which is returned in `window`.
`window_at_pointer` () | Obtains the window underneath the mouse pointer, returning the location of that window in `win_x`, `win_y`. Returns `NULL` if the window under the mouse pointer is not known to GDK (for example, belongs to another application).

### gdk_set_pointer_hooks ()

    GdkPointerHooks*    gdk_set_pointer_hooks               (const GdkPointerHooks *new_hooks);

This function allows for hooking into the operation of getting the current location of the pointer. This is only useful for such low-level tools as an event recorder. Applications should never have any reason to use this facility.

This function is not multihead safe. For multihead operation, see `gdk_display_set_pointer_hooks()`.

`new_hooks` : | a table of pointers to functions for getting quantities related to the current pointer position, or `NULL` to restore the default table.
Returns : | the previous pointer hook table