## GtkTreeViewColumn

GtkTreeViewColumn — A visible column in a GtkTreeView widget

## Synopsis

    #include <gtk/gtk.h>

    enum        GtkTreeViewColumnSizing;
    void        (*GtkTreeCellDataFunc)          (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell,
                                                 GtkTreeModel *tree_model,
                                                 GtkTreeIter *iter,
                                                 gpointer data);
                GtkTreeViewColumn;
    GtkTreeViewColumn* gtk_tree_view_column_new (void);
    GtkTreeViewColumn* gtk_tree_view_column_new_with_attributes
                                                (const gchar *title,
                                                 GtkCellRenderer *cell,
                                                 ...);
    void        gtk_tree_view_column_pack_start (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell,
                                                 gboolean expand);
    void        gtk_tree_view_column_pack_end   (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell,
                                                 gboolean expand);
    void        gtk_tree_view_column_clear      (GtkTreeViewColumn *tree_column);
    GList*      gtk_tree_view_column_get_cell_renderers
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_add_attribute
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell_renderer,
                                                 const gchar *attribute,
                                                 gint column);
    void        gtk_tree_view_column_set_attributes
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell_renderer,
                                                 ...);
    void        gtk_tree_view_column_set_cell_data_func
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell_renderer,
                                                 GtkTreeCellDataFunc func,
                                                 gpointer func_data,
                                                 GtkDestroyNotify destroy);
    void        gtk_tree_view_column_clear_attributes
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell_renderer);
    void        gtk_tree_view_column_set_spacing
                                                (GtkTreeViewColumn *tree_column,
                                                 gint spacing);
    gint        gtk_tree_view_column_get_spacing
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_visible
                                                (GtkTreeViewColumn *tree_column,
                                                 gboolean visible);
    gboolean    gtk_tree_view_column_get_visible
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_resizable
                                                (GtkTreeViewColumn *tree_column,
                                                 gboolean resizable);
    gboolean    gtk_tree_view_column_get_resizable
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_sizing (GtkTreeViewColumn *tree_column,
                                                 GtkTreeViewColumnSizing type);
    GtkTreeViewColumnSizing gtk_tree_view_column_get_sizing
                                                (GtkTreeViewColumn *tree_column);
    gint        gtk_tree_view_column_get_width  (GtkTreeViewColumn *tree_column);
    gint        gtk_tree_view_column_get_fixed_width
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_fixed_width
                                                (GtkTreeViewColumn *tree_column,
                                                 gint fixed_width);
    void        gtk_tree_view_column_set_min_width
                                                (GtkTreeViewColumn *tree_column,
                                                 gint min_width);
    gint        gtk_tree_view_column_get_min_width
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_max_width
                                                (GtkTreeViewColumn *tree_column,
                                                 gint max_width);
    gint        gtk_tree_view_column_get_max_width
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_clicked    (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_title  (GtkTreeViewColumn *tree_column,
                                                 const gchar *title);
    const gchar* gtk_tree_view_column_get_title (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_expand (GtkTreeViewColumn *tree_column,
                                                 gboolean expand);
    gboolean    gtk_tree_view_column_get_expand (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_clickable
                                                (GtkTreeViewColumn *tree_column,
                                                 gboolean clickable);
    gboolean    gtk_tree_view_column_get_clickable
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_widget (GtkTreeViewColumn *tree_column,
                                                 GtkWidget *widget);
    GtkWidget*  gtk_tree_view_column_get_widget (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_alignment
                                                (GtkTreeViewColumn *tree_column,
                                                 gfloat xalign);
    gfloat      gtk_tree_view_column_get_alignment
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_reorderable
                                                (GtkTreeViewColumn *tree_column,
                                                 gboolean reorderable);
    gboolean    gtk_tree_view_column_get_reorderable
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_sort_column_id
                                                (GtkTreeViewColumn *tree_column,
                                                 gint sort_column_id);
    gint        gtk_tree_view_column_get_sort_column_id
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_sort_indicator
                                                (GtkTreeViewColumn *tree_column,
                                                 gboolean setting);
    gboolean    gtk_tree_view_column_get_sort_indicator
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_set_sort_order
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkSortType order);
    GtkSortType gtk_tree_view_column_get_sort_order
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_cell_set_cell_data
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkTreeModel *tree_model,
                                                 GtkTreeIter *iter,
                                                 gboolean is_expander,
                                                 gboolean is_expanded);
    void        gtk_tree_view_column_cell_get_size
                                                (GtkTreeViewColumn *tree_column,
                                                 GdkRectangle *cell_area,
                                                 gint *x_offset,
                                                 gint *y_offset,
                                                 gint *width,
                                                 gint *height);
    gboolean    gtk_tree_view_column_cell_get_position
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell_renderer,
                                                 gint *start_pos,
                                                 gint *width);
    gboolean    gtk_tree_view_column_cell_is_visible
                                                (GtkTreeViewColumn *tree_column);
    void        gtk_tree_view_column_focus_cell (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell);
    void        gtk_tree_view_column_queue_resize
                                                (GtkTreeViewColumn *tree_column);

## Object Hierarchy

      GObject
       +----GtkObject
             +----GtkTreeViewColumn

## Implemented Interfaces

GtkTreeViewColumn implements GtkCellLayout.

## Properties

      "alignment"            gfloat                : Read / Write
      "clickable"            gboolean              : Read / Write
      "expand"               gboolean              : Read / Write
      "fixed-width"          gint                  : Read / Write
      "max-width"            gint                  : Read / Write
      "min-width"            gint                  : Read / Write
      "reorderable"          gboolean              : Read / Write
      "resizable"            gboolean              : Read / Write
      "sizing"               GtkTreeViewColumnSizing  : Read / Write
      "sort-indicator"       gboolean              : Read / Write
      "sort-order"           GtkSortType           : Read / Write
      "spacing"              gint                  : Read / Write
      "title"                gchararray            : Read / Write
      "visible"              gboolean              : Read / Write
      "widget"               GtkWidget             : Read / Write
      "width"                gint                  : Read

## Signals

    "clicked"   void        user_function      (GtkTreeViewColumn *treeviewcolumn,
                                                gpointer user_data);

## Description

The GtkTreeViewColumn object represents a visible column in a GtkTreeView widget. It allows to set properties of the column header, and functions as a holding pen for the cell renderers which determine how the data in the column is displayed.

Please refer to the tree widget conceptual overview for an overview of all the objects and data types related to the tree widget and how they work together.

## Details

### enum GtkTreeViewColumnSizing

    typedef enum
    {
      GTK_TREE_VIEW_COLUMN_GROW_ONLY,
      GTK_TREE_VIEW_COLUMN_AUTOSIZE,
      GTK_TREE_VIEW_COLUMN_FIXED
    } GtkTreeViewColumnSizing;

The sizing method the column uses to determine its width. Please note that `GTK_TREE_VIEW_COLUMN_AUTOSIZE` are inefficient for large views, and can make columns appear choppy.

`GTK_TREE_VIEW_COLUMN_GROW_ONLY` | Columns only get bigger in reaction to changes in the model
`GTK_TREE_VIEW_COLUMN_AUTOSIZE` | Columns resize to be the optimal size everytime the model changes.
`GTK_TREE_VIEW_COLUMN_FIXED` | Columns are a fixed numbers of pixels wide.

### GtkTreeCellDataFunc ()

    void        (*GtkTreeCellDataFunc)          (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell,
                                                 GtkTreeModel *tree_model,
                                                 GtkTreeIter *iter,
                                                 gpointer data);

A function to set the properties of a cell instead of just using the straight mapping between the cell and the model. This is useful for customizing the cell renderer. For example, a function might get an integer from the `tree_model`, and render it to the "text" attribute of "cell" by converting it to its written equivilent. This is set by calling `gtk_tree_view_column_set_cell_data_func()`

`tree_column` : | A GtkTreeColumn
`cell` : | The GtkCellRenderer that is being rendered by `tree_column`
`tree_model` : | The GtkTreeModel being rendered
`iter` : | A GtkTreeIter of the current row rendered
`data` : | user data

### GtkTreeViewColumn

    typedef struct _GtkTreeViewColumn GtkTreeViewColumn;

### gtk_tree_view_column_new ()

    GtkTreeViewColumn* gtk_tree_view_column_new (void);

Creates a new GtkTreeViewColumn.

Returns : | A newly created GtkTreeViewColumn.

### gtk_tree_view_column_new_with_attributes ()

    GtkTreeViewColumn* gtk_tree_view_column_new_with_attributes
                                                (const gchar *title,
                                                 GtkCellRenderer *cell,
                                                 ...);

Creates a new GtkTreeViewColumn with a number of default values. This is equivalent to calling `gtk_tree_view_column_set_title()`, `gtk_tree_view_column_pack_start()`, and `gtk_tree_view_column_set_attributes()` on the newly created GtkTreeViewColumn.

Here's a simple example:

     enum { TEXT_COLUMN, COLOR_COLUMN, N_COLUMNS };
     ...
     {
       GtkTreeViewColumn *column;
       GtkCellRenderer   *renderer = gtk_cell_renderer_text_new ();

       column = gtk_tree_view_column_new_with_attributes ("Title",
                                                          renderer,
                                                          "text", TEXT_COLUMN,
                                                          "foreground", COLOR_COLUMN,
                                                          NULL);
     }

`title` : | The title to set the header to.
`cell` : | The GtkCellRenderer.
`...` : | A `NULL`-terminated list of attributes.
Returns : | A newly created GtkTreeViewColumn.

### gtk_tree_view_column_pack_start ()

    void        gtk_tree_view_column_pack_start (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell,
                                                 gboolean expand);

Packs the `cell` into the beginning of the column. If `expand` is `FALSE`, then the `cell` is allocated no more space than it needs. Any unused space is divided evenly between cells for which `expand` is `TRUE`.

`tree_column` : | A GtkTreeViewColumn.
`cell` : | The GtkCellRenderer.
`expand` : | `TRUE` if `cell` is to be given extra space allocated to `tree_column`.

### gtk_tree_view_column_pack_end ()

    void        gtk_tree_view_column_pack_end   (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell,
                                                 gboolean expand);

Adds the `cell` to end of the column. If `expand` is `FALSE`, then the `cell` is allocated no more space than it needs. Any unused space is divided evenly between cells for which `expand` is `TRUE`.

`tree_column` : | A GtkTreeViewColumn.
`cell` : | The GtkCellRenderer.
`expand` : | `TRUE` if `cell` is to be given extra space allocated to `tree_column`.

### gtk_tree_view_column_clear ()

    void        gtk_tree_view_column_clear      (GtkTreeViewColumn *tree_column);

Unsets all the mappings on all renderers on the `tree_column`.

`tree_column` : | A GtkTreeViewColumn

### gtk_tree_view_column_get_cell_renderers ()

    GList*      gtk_tree_view_column_get_cell_renderers
                                                (GtkTreeViewColumn *tree_column);

Returns a newly-allocated GList of all the cell renderers in the column, in no particular order. The list must be freed with `g_list_free()`.

`tree_column` : | A GtkTreeViewColumn
Returns : | A list of GtkCellRenderers

### gtk_tree_view_column_add_attribute ()

    void        gtk_tree_view_column_add_attribute
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell_renderer,
                                                 const gchar *attribute,
                                                 gint column);

Adds an attribute mapping to the list in `tree_column`. The `column` is the column of the model to get a value from, and the `attribute` is the parameter on `cell_renderer` to be set from the value. So for example if column 2 of the model contains strings, you could have the "text" attribute of a GtkCellRendererText get its values from column 2.

`tree_column` : | A GtkTreeViewColumn.
`cell_renderer` : | the GtkCellRenderer to set attributes on
`attribute` : | An attribute on the renderer
`column` : | The column position on the model to get the attribute from.

### gtk_tree_view_column_set_attributes ()

    void        gtk_tree_view_column_set_attributes
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell_renderer,
                                                 ...);

Sets the attributes in the list as the attributes of `tree_column`. The attributes should be in attribute/column order, as in `gtk_tree_view_column_add_attribute()`. All existing attributes are removed, and replaced with the new attributes.

`tree_column` : | A GtkTreeViewColumn.
`cell_renderer` : | the GtkCellRenderer we're setting the attributes of
`...` : | A `NULL`-terminated list of attributes.

### gtk_tree_view_column_set_cell_data_func ()

    void        gtk_tree_view_column_set_cell_data_func
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell_renderer,
                                                 GtkTreeCellDataFunc func,
                                                 gpointer func_data,
                                                 GtkDestroyNotify destroy);

Sets the GtkTreeViewColumnFunc to use for the column. This function is used instead of the standard attributes mapping for setting the column value, and should set the value of `tree_column`'s cell renderer as appropriate. `func` may be `NULL` to remove an older one.

`tree_column` : | A GtkTreeViewColumn
`cell_renderer` : | A GtkCellRenderer
`func` : | The GtkTreeViewColumnFunc to use.
`func_data` : | The user data for `func`.
`destroy` : | The destroy notification for `func_data`

### gtk_tree_view_column_clear_attributes ()

    void        gtk_tree_view_column_clear_attributes
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell_renderer);

Clears all existing attributes previously set with `gtk_tree_view_column_set_attributes()`.

`tree_column` : | a GtkTreeViewColumn
`cell_renderer` : | a GtkCellRenderer to clear the attribute mapping on.

### gtk_tree_view_column_set_spacing ()

    void        gtk_tree_view_column_set_spacing
                                                (GtkTreeViewColumn *tree_column,
                                                 gint spacing);

Sets the spacing field of `tree_column`, which is the number of pixels to place between cell renderers packed into it.

`tree_column` : | A GtkTreeViewColumn.
`spacing` : | distance between cell renderers in pixels.

### gtk_tree_view_column_get_spacing ()

    gint        gtk_tree_view_column_get_spacing
                                                (GtkTreeViewColumn *tree_column);

Returns the spacing of `tree_column`.

`tree_column` : | A GtkTreeViewColumn.
Returns : | the spacing of `tree_column`.

### gtk_tree_view_column_set_visible ()

    void        gtk_tree_view_column_set_visible
                                                (GtkTreeViewColumn *tree_column,
                                                 gboolean visible);

Sets the visibility of `tree_column`.

`tree_column` : | A GtkTreeViewColumn.
`visible` : | `TRUE` if the `tree_column` is visible.

### gtk_tree_view_column_get_visible ()

    gboolean    gtk_tree_view_column_get_visible
                                                (GtkTreeViewColumn *tree_column);

Returns `TRUE` if `tree_column` is visible.

`tree_column` : | A GtkTreeViewColumn.
Returns : | whether the column is visible or not. If it is visible, then the tree will show the column.

### gtk_tree_view_column_set_resizable ()

    void        gtk_tree_view_column_set_resizable
                                                (GtkTreeViewColumn *tree_column,
                                                 gboolean resizable);

If `resizable` is `TRUE`, then the user can explicitly resize the column by grabbing the outer edge of the column button. If resizable is `TRUE` and sizing mode of the column is GTK_TREE_VIEW_COLUMN_AUTOSIZE, then the sizing mode is changed to GTK_TREE_VIEW_COLUMN_GROW_ONLY.

`tree_column` : | A GtkTreeViewColumn
`resizable` : | `TRUE`, if the column can be resized

### gtk_tree_view_column_get_resizable ()

    gboolean    gtk_tree_view_column_get_resizable
                                                (GtkTreeViewColumn *tree_column);

Returns `TRUE` if the `tree_column` can be resized by the end user.

`tree_column` : | A GtkTreeViewColumn
Returns : | `TRUE`, if the `tree_column` can be resized.

### gtk_tree_view_column_set_sizing ()

    void        gtk_tree_view_column_set_sizing (GtkTreeViewColumn *tree_column,
                                                 GtkTreeViewColumnSizing type);

Sets the growth behavior of `tree_column` to `type`.

`tree_column` : | A GtkTreeViewColumn.
`type` : | The GtkTreeViewColumnSizing.

### gtk_tree_view_column_get_sizing ()

    GtkTreeViewColumnSizing gtk_tree_view_column_get_sizing
                                                (GtkTreeViewColumn *tree_column);

Returns the current type of `tree_column`.

`tree_column` : | A GtkTreeViewColumn.
Returns : | The type of `tree_column`.

### gtk_tree_view_column_get_width ()

    gint        gtk_tree_view_column_get_width  (GtkTreeViewColumn *tree_column);

Returns the current size of `tree_column` in pixels.

`tree_column` : | A GtkTreeViewColumn.
Returns : | The current width of `tree_column`.

### gtk_tree_view_column_get_fixed_width ()

    gint        gtk_tree_view_column_get_fixed_width
                                                (GtkTreeViewColumn *tree_column);

Gets the fixed width of the column. This value is only meaning may not be the actual width of the column on the screen, just what is requested.

`tree_column` : | a GtkTreeViewColumn
Returns : | the fixed width of the column

### gtk_tree_view_column_set_fixed_width ()

    void        gtk_tree_view_column_set_fixed_width
                                                (GtkTreeViewColumn *tree_column,
                                                 gint fixed_width);

Sets the size of the column in pixels. This is meaningful only if the sizing type is GTK_TREE_VIEW_COLUMN_FIXED. The size of the column is clamped to the min/max width for the column. Please note that the min/max width of the column doesn't actually affect the "fixed_width" property of the widget, just the actual size when displayed.

`tree_column` : | A GtkTreeViewColumn.
`fixed_width` : | The size to set `tree_column` to. Must be greater than 0.

### gtk_tree_view_column_set_min_width ()

    void        gtk_tree_view_column_set_min_width
                                                (GtkTreeViewColumn *tree_column,
                                                 gint min_width);

Sets the minimum width of the `tree_column`. If `min_width` is -1, then the minimum width is unset.

`tree_column` : | A GtkTreeViewColumn.
`min_width` : | The minimum width of the column in pixels, or -1.

### gtk_tree_view_column_get_min_width ()

    gint        gtk_tree_view_column_get_min_width
                                                (GtkTreeViewColumn *tree_column);

Returns the minimum width in pixels of the `tree_column`, or -1 if no minimum width is set.

`tree_column` : | A GtkTreeViewColumn.
Returns : | The minimum width of the `tree_column`.

### gtk_tree_view_column_set_max_width ()

    void        gtk_tree_view_column_set_max_width
                                                (GtkTreeViewColumn *tree_column,
                                                 gint max_width);

Sets the maximum width of the `tree_column`. If `max_width` is -1, then the maximum width is unset. Note, the column can actually be wider than max width if it's the last column in a view. In this case, the column expands to fill any extra space.

`tree_column` : | A GtkTreeViewColumn.
`max_width` : | The maximum width of the column in pixels, or -1.

### gtk_tree_view_column_get_max_width ()

    gint        gtk_tree_view_column_get_max_width
                                                (GtkTreeViewColumn *tree_column);

Returns the maximum width in pixels of the `tree_column`, or -1 if no maximum width is set.

`tree_column` : | A GtkTreeViewColumn.
Returns : | The maximum width of the `tree_column`.

### gtk_tree_view_column_clicked ()

    void        gtk_tree_view_column_clicked    (GtkTreeViewColumn *tree_column);

Emits the "clicked" signal on the column. This function will only work if `tree_column` is clickable.

`tree_column` : | a GtkTreeViewColumn

### gtk_tree_view_column_set_title ()

    void        gtk_tree_view_column_set_title  (GtkTreeViewColumn *tree_column,
                                                 const gchar *title);

Sets the title of the `tree_column`. If a custom widget has been set, then this value is ignored.

`tree_column` : | A GtkTreeViewColumn.
`title` : | The title of the `tree_column`.

### gtk_tree_view_column_get_title ()

    const gchar* gtk_tree_view_column_get_title (GtkTreeViewColumn *tree_column);

Returns the title of the widget.

`tree_column` : | A GtkTreeViewColumn.
Returns : | the title of the column. This string should not be modified or freed.

### gtk_tree_view_column_set_expand ()

    void        gtk_tree_view_column_set_expand (GtkTreeViewColumn *tree_column,
                                                 gboolean expand);

Sets the column to take available extra space. This space is shared equally amongst all columns that have the expand set to `TRUE`. If no column has this option set, then the last column gets all extra space. By default, every column is created with this `FALSE`.

`tree_column` : | A GtkTreeViewColumn
`expand` : | `TRUE` if the column should take available extra space, `FALSE` if not

Since 2.4

### gtk_tree_view_column_get_expand ()

    gboolean    gtk_tree_view_column_get_expand (GtkTreeViewColumn *tree_column);

Return `TRUE` if the column expands to take any available space.

`tree_column` : | a GtkTreeViewColumn
Returns : | `TRUE`, if the column expands

Since 2.4

### gtk_tree_view_column_set_clickable ()

    void        gtk_tree_view_column_set_clickable
                                                (GtkTreeViewColumn *tree_column,
                                                 gboolean clickable);

Sets the header to be active if `active` is `TRUE`. When the header is active, then it can take keyboard focus, and can be clicked.

`tree_column` : | A GtkTreeViewColumn.
`clickable` : | `TRUE` if the header is active.

### gtk_tree_view_column_get_clickable ()

    gboolean    gtk_tree_view_column_get_clickable
                                                (GtkTreeViewColumn *tree_column);

Returns `TRUE` if the user can click on the header for the column.

`tree_column` : | a GtkTreeViewColumn
Returns : | `TRUE` if user can click the column header.

### gtk_tree_view_column_set_widget ()

    void        gtk_tree_view_column_set_widget (GtkTreeViewColumn *tree_column,
                                                 GtkWidget *widget);

Sets the widget in the header to be `widget`. If widget is `NULL`, then the header button is set with a GtkLabel set to the title of `tree_column`.

`tree_column` : | A GtkTreeViewColumn.
`widget` : | A child GtkWidget, or `NULL`.

### gtk_tree_view_column_get_widget ()

    GtkWidget*  gtk_tree_view_column_get_widget (GtkTreeViewColumn *tree_column);

Returns the GtkWidget in the button on the column header. If a custom widget has not been set then `NULL` is returned.

`tree_column` : | A GtkTreeViewColumn.
Returns : | The GtkWidget in the column header, or `NULL`

### gtk_tree_view_column_set_alignment ()

    void        gtk_tree_view_column_set_alignment
                                                (GtkTreeViewColumn *tree_column,
                                                 gfloat xalign);

Sets the alignment of the title or custom widget inside the column header. The alignment determines its location inside the button -- 0.0 for left, 0.5 for center, 1.0 for right.

`tree_column` : | A GtkTreeViewColumn.
`xalign` : | The alignment, which is between [0.0 and 1.0] inclusive.

### gtk_tree_view_column_get_alignment ()

    gfloat      gtk_tree_view_column_get_alignment
                                                (GtkTreeViewColumn *tree_column);

Returns the current x alignment of `tree_column`. This value can range between 0.0 and 1.0.

`tree_column` : | A GtkTreeViewColumn.
Returns : | The current alignent of `tree_column`.

### gtk_tree_view_column_set_reorderable ()

    void        gtk_tree_view_column_set_reorderable
                                                (GtkTreeViewColumn *tree_column,
                                                 gboolean reorderable);

If `reorderable` is `TRUE`, then the column can be reordered by the end user dragging the header.

`tree_column` : | A GtkTreeViewColumn
`reorderable` : | `TRUE`, if the column can be reordered.

### gtk_tree_view_column_get_reorderable ()

    gboolean    gtk_tree_view_column_get_reorderable
                                                (GtkTreeViewColumn *tree_column);

Returns `TRUE` if the `tree_column` can be reordered by the user.

`tree_column` : | A GtkTreeViewColumn
Returns : | `TRUE` if the `tree_column` can be reordered by the user.

### gtk_tree_view_column_set_sort_column_id ()

    void        gtk_tree_view_column_set_sort_column_id
                                                (GtkTreeViewColumn *tree_column,
                                                 gint sort_column_id);

Sets the logical `sort_column_id` that this column sorts on when this column is selected for sorting. Doing so makes the column header clickable.

`tree_column` : | a GtkTreeViewColumn
`sort_column_id` : | The `sort_column_id` of the model to sort on.

### gtk_tree_view_column_get_sort_column_id ()

    gint        gtk_tree_view_column_get_sort_column_id
                                                (GtkTreeViewColumn *tree_column);

Gets the logical `sort_column_id` that the model sorts on when this column is selected for sorting. See `gtk_tree_view_column_set_sort_column_id()`.

`tree_column` : | a GtkTreeViewColumn
Returns : | the current `sort_column_id` for this column, or -1 if this column can't be used for sorting.

### gtk_tree_view_column_set_sort_indicator ()

    void        gtk_tree_view_column_set_sort_indicator
                                                (GtkTreeViewColumn *tree_column,
                                                 gboolean setting);

Call this function with a `setting` of `TRUE` to display an arrow in the header button indicating the column is sorted. Call `gtk_tree_view_column_set_sort_order()` to change the direction of the arrow.

`tree_column` : | a GtkTreeViewColumn
`setting` : | `TRUE` to display an indicator that the column is sorted

### gtk_tree_view_column_get_sort_indicator ()

    gboolean    gtk_tree_view_column_get_sort_indicator
                                                (GtkTreeViewColumn *tree_column);

Gets the value set by `gtk_tree_view_column_set_sort_indicator()`.

`tree_column` : | a GtkTreeViewColumn
Returns : | whether the sort indicator arrow is displayed

### gtk_tree_view_column_set_sort_order ()

    void        gtk_tree_view_column_set_sort_order
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkSortType order);

Changes the appearance of the sort indicator.

This does not actually sort the model. Use `gtk_tree_view_column_set_sort_column_id()` if you want automatic sorting support. This function is primarily for custom sorting behavior, and should be used in conjunction with `gtk_tree_sortable_set_sort_column()` to do that. For custom models, the mechanism will vary.

The sort indicator changes direction to indicate normal sort or reverse sort. Note that you must have the sort indicator enabled to see anything when calling this function; see `gtk_tree_view_column_set_sort_indicator()`.

`tree_column` : | a GtkTreeViewColumn
`order` : | sort order that the sort indicator should indicate

### gtk_tree_view_column_get_sort_order ()

    GtkSortType gtk_tree_view_column_get_sort_order
                                                (GtkTreeViewColumn *tree_column);

Gets the value set by `gtk_tree_view_column_set_sort_order()`.

`tree_column` : | a GtkTreeViewColumn
Returns : | the sort order the sort indicator is indicating

### gtk_tree_view_column_cell_set_cell_data ()

    void        gtk_tree_view_column_cell_set_cell_data
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkTreeModel *tree_model,
                                                 GtkTreeIter *iter,
                                                 gboolean is_expander,
                                                 gboolean is_expanded);

Sets the cell renderer based on the `tree_model` and `iter`. That is, for every attribute mapping in `tree_column`, it will get a value from the set column on the `iter`, and use that value to set the attribute on the cell renderer. This is used primarily by the GtkTreeView.

`tree_column` : | A GtkTreeViewColumn.
`tree_model` : | The GtkTreeModel to to get the cell renderers attributes from.
`iter` : | The GtkTreeIter to to get the cell renderer's attributes from.
`is_expander` : | `TRUE`, if the row has children
`is_expanded` : | `TRUE`, if the row has visible children

### gtk_tree_view_column_cell_get_size ()

    void        gtk_tree_view_column_cell_get_size
                                                (GtkTreeViewColumn *tree_column,
                                                 GdkRectangle *cell_area,
                                                 gint *x_offset,
                                                 gint *y_offset,
                                                 gint *width,
                                                 gint *height);

Obtains the width and height needed to render the column. This is used primarily by the GtkTreeView.

`tree_column` : | A GtkTreeViewColumn.
`cell_area` : | The area a cell in the column will be allocated, or `NULL`
`x_offset` : | location to return x offset of a cell relative to `cell_area`, or `NULL`
`y_offset` : | location to return y offset of a cell relative to `cell_area`, or `NULL`
`width` : | location to return width needed to render a cell, or `NULL`
`height` : | location to return height needed to render a cell, or `NULL`

### gtk_tree_view_column_cell_get_position ()

    gboolean    gtk_tree_view_column_cell_get_position
                                                (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell_renderer,
                                                 gint *start_pos,
                                                 gint *width);

Obtains the horizontal position and size of a cell in a column. If the cell is not found in the column, `start_pos` and `width` are not changed and `FALSE` is returned.

`tree_column` : | a GtkTreeViewColumn
`cell_renderer` : | a GtkCellRenderer
`start_pos` : | return location for the horizontal position of `cell` within `tree_column`, may be `NULL`
`width` : | return location for the width of `cell`, may be `NULL`
Returns : | `TRUE` if `cell` belongs to `tree_column`.

### gtk_tree_view_column_cell_is_visible ()

    gboolean    gtk_tree_view_column_cell_is_visible
                                                (GtkTreeViewColumn *tree_column);

Returns `TRUE` if any of the cells packed into the `tree_column` are visible. For this to be meaningful, you must first initialize the cells with `gtk_tree_view_column_cell_set_cell_data()`

`tree_column` : | A GtkTreeViewColumn
Returns : | `TRUE`, if any of the cells packed into the `tree_column` are currently visible

### gtk_tree_view_column_focus_cell ()

    void        gtk_tree_view_column_focus_cell (GtkTreeViewColumn *tree_column,
                                                 GtkCellRenderer *cell);

Sets the current keyboard focus to be at `cell`, if the column contains 2 or more editable and activatable cells.

`tree_column` : | A GtkTreeViewColumn
`cell` : | A GtkCellRenderer

Since 2.2

### gtk_tree_view_column_queue_resize ()

    void        gtk_tree_view_column_queue_resize
                                                (GtkTreeViewColumn *tree_column);

Flags the column, and the cell renderers added to this column, to have their sizes renegotiated.

`tree_column` : | A GtkTreeViewColumn

Since 2.8

## Property Details

### The "`alignment`" property

      "alignment"            gfloat                : Read / Write

X Alignment of the column header text or widget.

Allowed values: [0,1]

Default value: 0

### The "`clickable`" property

      "clickable"            gboolean              : Read / Write

Whether the header can be clicked.

Default value: FALSE

### The "`expand`" property

      "expand"               gboolean              : Read / Write

Column gets share of extra width allocated to the widget.

Default value: FALSE

### The "`fixed-width`" property

      "fixed-width"          gint                  : Read / Write

Current fixed width of the column.

Allowed values: >= 1

Default value: 1

### The "`max-width`" property

      "max-width"            gint                  : Read / Write

Maximum allowed width of the column.

Allowed values: >= -1

Default value: -1

### The "`min-width`" property

      "min-width"            gint                  : Read / Write

Minimum allowed width of the column.

Allowed values: >= -1

Default value: -1

### The "`reorderable`" property

      "reorderable"          gboolean              : Read / Write

Whether the column can be reordered around the headers.

Default value: FALSE

### The "`resizable`" property

      "resizable"            gboolean              : Read / Write

Column is user-resizable.

Default value: FALSE

### The "`sizing`" property

      "sizing"               GtkTreeViewColumnSizing  : Read / Write

Resize mode of the column.

Default value: GTK_TREE_VIEW_COLUMN_GROW_ONLY

### The "`sort-indicator`" property

      "sort-indicator"       gboolean              : Read / Write

Whether to show a sort indicator.

Default value: FALSE

### The "`sort-order`" property

      "sort-order"           GtkSortType           : Read / Write

Sort direction the sort indicator should indicate.

Default value: GTK_SORT_ASCENDING

### The "`spacing`" property

      "spacing"              gint                  : Read / Write

Space which is inserted between cells.

Allowed values: >= 0

Default value: 0

### The "`title`" property

      "title"                gchararray            : Read / Write

Title to appear in column header.

Default value: ""

### The "`visible`" property

      "visible"              gboolean              : Read / Write

Whether to display the column.

Default value: TRUE

### The "`widget`" property

      "widget"               GtkWidget             : Read / Write

Widget to put in column header button instead of column title.

### The "`width`" property

      "width"                gint                  : Read

Current width of the column.

Allowed values: >= 0

Default value: 0

## Signal Details

### The "clicked" signal

    void        user_function                  (GtkTreeViewColumn *treeviewcolumn,
                                                gpointer user_data);

`treeviewcolumn` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

## See Also

GtkTreeView, GtkTreeSelection, GtkTreeDnd, GtkTreeMode, GtkTreeSortable, GtkTreeModelSort, GtkListStore, GtkTreeStore, GtkCellRenderer, GtkCellEditable, GtkCellRendererPixbuf, GtkCellRendererText, GtkCellRendererToggle