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# Package Gtk.Ctree

This widget is similar to GtkClist but it displays a tree with expandable nodes instead of a simple list. Gtk_Tree is a more flexible tree widget (it can have arbitrary widgets in the tree cells), but it is less efficient and is limited to 32768 pixels.

- Gtk.Ctree Widget Hierarchy
- Gtk.Ctree Signals
- Gtk.Ctree Types
- Gtk.Ctree Subprograms

## Widget Hierarchy

    Gtk_Object                    (see section Package Gtk.Object)
       \___ Gtk_Widget            (see section Package Gtk.Widget)
          \___ Gtk_Container      (see section Package Gtk.Container)
             \___ Gtk_Clist       (see section Package Gtk.Clist)
                \___ Gtk_Ctree    (see section Package Gtk.Ctree)

## Signals

- "tree_collapse" procedure Handler (Ctree : access Gtk_Clist_Record'Class;
  Node : Gtk_Ctree_Node);
  Emitted when the subtree associated with a Node is collapsed.
- "tree_expand" procedure Handler (Ctree : access Gtk_Clist_Record'Class;
  Node : Gtk_Ctree_Node);
  Emitted when the subtree associated with a Node is expanded.
- "tree_move" procedure Handler (Ctree : access Gtk_Clist_Record'Class;
  Node : Gtk_Ctree_Node);
  New_Parent : Gtk_Ctree_Node);
  New_Sibling : Gtk_Ctree_Node);
  Emitted when a Node is moved (e.g its parent and/or its sibling changed).
- "tree_select_row" procedure Handler (Ctree : access Gtk_Ctree_Record'Class;
  Node : Gtk_Ctree_Node;
  Column : Gint);
  Emitted to request the selection of a node. Column is the column number where the user clicked.
- "tree_unselect_row" procedure Handler (Ctree : access Gtk_Ctree_Record'Class;
  Node : Gtk_Ctree_Node;
  Column : Gint);
  Emitted to request the unselection of a node.

## Types

    type Gcompare_Func is access function
        (A, B : in Data_Type) return Boolean;
| Function used to compare data types in the functions Find_[All] By_Row_Data_Custom.
    type Gtk_Ctree_Compare_Drag_Func is access function
        (Ctree        : in Gtk_Ctree;
         Source_Node  : in Gtk_Ctree_Node;
         New_Parent   : in Gtk_Ctree_Node;
         New_Sibling  : in Gtk_Ctree_Node) return Boolean;
| Function type used in Set_Drag_Compare_Func.
    type Gtk_Ctree_Func is access procedure
        (Ctree : access Gtk_Ctree_Record'Class;
         Node  : in     Gtk_Ctree_Node;
         Data  : in     Data_Type_Access);
| Function used by Post/Pre_Recursive functions below.
    type Gtk_Ctree_Node is new Gdk.C_Proxy;
| This type represents a node inside a Ctree.
    type Gtk_Ctree_Row is new Gtk.Clist.Gtk_Clist_Row;
| Similar to Clist_Row, but for a Ctree.

## Subprograms

### Creation, insertion, deletion
Elements inside a Gtk_Ctree are not ordered from the top to the bottom as is the case for Gtk_Clist. Instead, they are put in the ctree by indicating where in the tree they should be placed. The position of an element (called a node) is defined by a parent node and a sibling node. The node will be attached in the parent subtree, on top of the sibling node.
    procedure Gtk_New
      (Widget             : out    Gtk_Ctree;
       Columns            : in     Gint;
       Tree_Column        : in     Gint := 0);
| Create a ctree with Columns columns. Tree_Column indicates in which column the tree will be displayed.
    procedure Gtk_New
      (Widget             : out    Gtk_Ctree;
       Titles             : in     Chars_Ptr_Array;
       Tree_Column        : in     Gint := 0);
| Create a ctree with Titles'Length columns. Titles gives the title of each column. Tree_Column indicates in which column the tree will be displayed.
    function Get_Type              return Gtk.Gtk_Type;
| Return the internal value associated with a Gtk_Ctree.
    function Insert_Node
      (Ctree              : access Gtk_Ctree_Record;
       Parent             : in     Gtk_Ctree_Node;
       Sibling            : in     Gtk_Ctree_Node;
       Text               : in     Chars_Ptr_Array;
       Spacing            : in     Guint8;
       Pixmap_Closed      : in     Gdk.Pixmap.Gdk_Pixmap;
       Mask_Closed        : in     Gdk.Bitmap.Gdk_Bitmap;
       Pixmap_Opened      : in     Gdk.Pixmap.Gdk_Pixmap;
       Mask_Opened        : in     Gdk.Bitmap.Gdk_Bitmap;
       Is_Leaf            : in     Boolean;
       Expanded           : in     Boolean)
       return Gtk_Ctree_Node;
| Insert a new node in the Ctree. Parent is the parent node. If null, the new node is part of the root. The new node will be inserted right on top of Sibling. If Sibling is null, then it will be the first node in the subtree. Text contains the text for each cell of the node. Note that Insert_Node expects the length of the Text parameter to be equal to the number of columns of the Ctree. Spacing is the number of pixels between the lines of the tree and the text in the same column. If Is_Leaf is True, then the node won't contain any subtree. If False, the newly created node can be used as the Parent for further node creation. In this case, Expanded indicates whether the subtree associated with this node should be initially visible. In addition to the "+" or "-" sign indicating whether the subtree is expanded or not, it is possible to put a pixmap giving this information. Pixmap_Closed and Mask_Closed represent the image and the mask used when the subtree is closed; similarly, Pixmap_Opened and Mask_Opened represent the image and the mask used when the subtree is opened.
    procedure Remove_Node
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node);
| Remove Node from Ctree.
### Tree, Node and Row basic manipulation
    function Get_Tree_Column
      (Widget             : access Gtk.Ctree.Gtk_Ctree_Record'Class)
       return Gint;
| Return the Tree_Column attribute of a given Node. Tree_Column indicates in which column the tree will be displayed.
    function Get_Node_List
      (Ctree              : access Gtk_Ctree_Record)
       return Node_List.Glist;
| Return the list of nodes associated with a given Ctree. Note: you need to extract the nodes with Node_List.Get_Gpointer.
    function Get_Row_List
      (Ctree              : access Gtk_Ctree_Record)
       return Row_List.Glist;
| Return the list of rows associated with a given Ctree.
    function Get_Selection
      (Ctree              : access Gtk_Ctree_Record)
       return Node_List.Glist;
| Return the list of nodes currently selected. Extract the nodes with Node_List.Get_Data
    function Node_Get_Row
      (Node               : in     Gtk_Ctree_Node)
       return Gtk_Ctree_Row;
| Return the row of a given Node.
    function Row_Get_Children
      (Row                : in     Gtk_Ctree_Row)
       return Gtk_Ctree_Node;
| Return the children node of a given Row.
    function Row_Get_Expanded
      (Row                : in     Gtk_Ctree_Row)
       return Boolean;
| Return the expanded attribute of a given Row. Note that Expanded can also be retrieved via Get_Node_Info, this function is just a quick accessor.
    function Row_Get_Is_Leaf
      (Row                : in     Gtk_Ctree_Row)
       return Boolean;
| Return the leaf attribute of a given Row. Note that Is_Leaf can also be retrieved via Get_Node_Info, this function is just a quick accessor.
    function Row_Get_Parent
      (Row                : in     Gtk_Ctree_Row)
       return Gtk_Ctree_Node;
| Return the parent node of a given Row.
    function Row_Get_Sibling
      (Row                : in     Gtk_Ctree_Row)
       return Gtk_Ctree_Node;
| Return the sibling node of a given Row.
    function Is_Created
      (Node               : in     Gtk_Ctree_Node)
       return Boolean;
| Return True if Node is different from Null_Ctree_Node
### Querying / finding tree information
    function Is_Viewable
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node)
       return Boolean;
| Return True if Node is viewable. A Node is viewable if all the trees and subtrees containing it are expanded.
    function Last
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node)
       return Gtk_Ctree_Node;
| Return the last node of a given subtree. Starting at Node, this function will recursively look for the last sibling of the last child. Return an empty node is Node is empty.
    function Find_Node_Ptr
      (Ctree              : access Gtk_Ctree_Record;
       Ctree_Row          : in     Gtk_Ctree_Row)
       return Gtk_Ctree_Node;
| Return the node corresponding to a given row.
    function Node_Nth
      (Ctree              : access Gtk_Ctree_Record;
       Row                : in     Guint)
       return Gtk_Ctree_Node;
| Return the Node corresponding to the nth row of a given Ctree.
    function Find
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Child              : in     Gtk_Ctree_Node)
       return Boolean;
| Recursively search for a given Child in a given subtree. the subtree is determined by Node. If Node is empty, the search will occur on the whole tree. Return True if Child is found, False otherwise.
    function Is_Ancestor
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Child              : in     Gtk_Ctree_Node)
       return Boolean;
| Indicate whether Node is an ancestor of Child. It is assumed that Node is not empty.
    function Is_Hot_Spot
      (Ctree              : access Gtk_Ctree_Record;
       X                  : in     Gint;
       Y                  : in     Gint)
       return Boolean;
| Return True if the Ctree is centered on (x,y)
### Tree signals: move, expand, collapse, (un)select
    procedure Move
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       New_Parent         : in     Gtk_Ctree_Node;
       New_Sibling        : in     Gtk_Ctree_Node);
| Move a node in a Ctree. After its creation, a node can be moved. New_Parent points to the new parent node that will contain Node. If null, Node will be attached to the root. New_Sibling indicates under which node Node will be inserted. If New_Sibling is null, the new node will be the lowest in its branch.
    procedure Expand
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node);
| Expand the first level of the subtree associated with Node.
    procedure Expand_Recursive
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node := null);
| Expand the whole subtree associated with Node.
    procedure Expand_To_Depth
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node := null;
       Depth              : in     Gint);
| Expand the subtree associated with Node and its descendants until Depth levels of subtrees have been reached.
    procedure Collapse
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node);
| Collapse the first level of the subtree associated with Node.
    procedure Collapse_Recursive
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node := null);
| Collapse the whole subtree associated with Node.
    procedure Collapse_To_Depth
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node := null;
       Depth              : in     Gint);
| Collapse the subtree associated with Node and its descendants until Depth levels of subtrees have been reached.
    procedure Toggle_Expansion
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node);
| Change the state of the Ctree from expanded to collapsed and the other way around on one level.
    procedure Toggle_Expansion_Recursive
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node);
| Change the state of the Ctree from expanded to collapsed and the other way around for the whole subtree.
    procedure Gtk_Select
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node);
| Select a specified Node, and only this one.
    procedure Select_Recursive
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node := null);
| Select a specified Node, and its whole subtree.
    procedure Unselect
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node);
| Unselect a specified Node, and only this one.
    procedure Unselect_Recursive
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node := null);
| Unselect a specified Node, and its whole subtree.
    procedure Real_Select_Recursive
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node := null;
       Do_Select          : in     Boolean);
| Similar to Select_Recursive or Unselect_Recursive. If Do_Select is True, equivalent to Select_Recursive. If Do_Select is False, equivalent to Unselect_Recursive.
### Analogs of Gtk_Clist functions
    procedure Node_Set_Text
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Column             : in     Gint;
       Text               : in     String);
| Set the cell's text, replacing its current contents. This changes the type of the cell to Cell_Text. The pixmap (if any) will no longer be displayed.
    function Node_Get_Text
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Column             : in     Gint)
       return String;
| Return the text contained in cell. An empty string is returned if Column is invalid or if the Cell did not contain any text (only a pixmap)
    procedure Node_Set_Pixmap
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Column             : in     Gint;
       Pixmap             : in     Gdk.Pixmap.Gdk_Pixmap;
       Mask               : in     Gdk.Bitmap.Gdk_Bitmap);
| Set the cell's pixmap, replacing its current contents. The type of the cell becomes Cell_Pixmap, and the text is no longer displayed.
    procedure Node_Get_Pixmap
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Column             : in     Gint;
       Pixmap             : out    Gdk.Pixmap.Gdk_Pixmap;
       Mask               : out    Gdk.Bitmap.Gdk_Bitmap;
       Success            : out    Boolean);
| Return the Pixmap contained in a cell. The type of the cell should be Cell_Pixmap. The result is meaningful only if Success is True. If the Cell did not contain a pixmap, Success is set to False.
    procedure Node_Set_Pixtext
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Column             : in     Gint;
       Text               : in     String;
       Spacing            : in     Guint8;
       Pixmap             : in     Gdk.Pixmap.Gdk_Pixmap;
       Mask               : in     Gdk.Bitmap.Gdk_Bitmap);
| Set both the Text and the Pixmap for the cell. Replace its current contents. The type of the cell becomes Cell_Pixtext, and both the text and the pixmap are displayed.
    procedure Node_Get_Pixtext
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Column             : in     Gint;
       Text               : out    Interfaces.C.Strings.chars_ptr;
       Spacing            : out    Guint8;
       Pixmap             : out    Gdk.Pixmap.Gdk_Pixmap;
       Mask               : out    Gdk.Bitmap.Gdk_Bitmap;
       Success            : out    Boolean);
| Return the Text and the Pixmap for the cell. The result is not meaningful if Success is False.
    procedure Node_Set_Shift
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Column             : in     Gint;
       Vertical           : in     Gint;
       Horizontal         : in     Gint);
| Set a horizontal and vertical shift for drawing the content of the cell. Both shifts can be either positive or negative. This is particularly useful for indenting items in a columns.
    procedure Set_Node_Info
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Text               : in     String;
       Spacing            : in     Guint8;
       Pixmap_Closed      : in     Gdk.Pixmap.Gdk_Pixmap;
       Mask_Closed        : in     Gdk.Bitmap.Gdk_Bitmap;
       Pixmap_Opened      : in     Gdk.Pixmap.Gdk_Pixmap;
       Mask_Opened        : in     Gdk.Bitmap.Gdk_Bitmap;
       Is_Leaf            : in     Boolean;
       Expanded           : in     Boolean);
| Set all the info related to a specific Node.
    procedure Get_Node_Info
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Text               : out    Interfaces.C.Strings.chars_ptr;
       Spacing            : out    Guint8;
       Pixmap_Closed      : out    Gdk.Pixmap.Gdk_Pixmap;
       Mask_Closed        : out    Gdk.Bitmap.Gdk_Bitmap;
       Pixmap_Opened      : out    Gdk.Pixmap.Gdk_Pixmap;
       Mask_Opened        : out    Gdk.Bitmap.Gdk_Bitmap;
       Is_Leaf            : out    Boolean;
       Expanded           : out    Boolean;
       Success            : out    Boolean);
| Return all the info related to a specific Node.
    procedure Node_Set_Selectable
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Selectable         : in     Boolean := True);
| Indicate whether the Node can be selected or not. The default value is True.
    function Node_Get_Selectable
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node)
       return Boolean;
| Return the selectable status of the Node.
    procedure Node_Set_Row_Style
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Style              : in     Gtk.Style.Gtk_Style);
| Set the default style for the cells in the Node. This can be overridden for each cell with Node_Set_Cell_Style.
    function Node_Get_Row_Style
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node)
       return Gtk.Style.Gtk_Style;
| Return the default style used for the Node.
    procedure Node_Set_Cell_Style
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Column             : in     Gint;
       Style              : in     Gtk.Style.Gtk_Style);
| Set the style (font, color, ...) used for the cell. This overrides the Node's style.
    function Node_Get_Cell_Style
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Column             : in     Gint)
       return Gtk.Style.Gtk_Style;
| Return the style of the cell.
    procedure Node_Set_Foreground
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Color              : in     Gdk.Color.Gdk_Color);
| Set the foreground color for the Node. The color must already be allocated. If no such Node exists in the tree, nothing is done.
    procedure Node_Set_Background
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Color              : in     Gdk.Color.Gdk_Color);
| Set the background color for the Node. The color must already be allocated. If no such Node exists in the tree, nothing is done.
    function Node_Get_Cell_Type
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Column             : in     Gint)
       return Gtk_Cell_Type;
| Return the type of the cell at Node/Column. This indicates which of the functions Node_Get_Text. Node_Get_Pixmap, etc. should be used with this cell.
    procedure Node_Moveto
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node;
       Column             : in     Gint;
       Row_Align          : in     Gfloat := 0.5;
       Col_Align          : in     Gfloat := 0.5);
| Make a Node visible. Column indicates which column of the Node should be visible, if not all columns can be displayed. Row_Align and Col_Align are parameters between 0.0 and 1.0, and specify how the Node and the Column will be centered in the Ctree window. 0.0 means a Node on the top, and a Column on the left.
    function Node_Is_Visible
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node)
       return Gtk_Visibility;
| Indicate the visibility of a Node. Return Visibility_None if the Node is not visible in the Ctree window; Visibility_Partial if the Node is partially visible; Visibility_Full if the Node is entirely visible. This function ignores the fact that Node is in an expanded or collapsed subtree.
### Ctree specific functions
    procedure Set_Indent
      (Ctree              : access Gtk_Ctree_Record;
       Indent             : in     Gint := 20);
| Change the indentation of the Ctree. Each different level of a subtree is indented by a number of pixels. By default, the indentation is 20 pixels, and can be changed using this procedure.
    function Get_Indent
      (Widget             : access Gtk.Ctree.Gtk_Ctree_Record'Class)
       return Gint;
| Return the indentation of a Ctree.
    procedure Set_Spacing
      (Ctree              : access Gtk_Ctree_Record;
       Spacing            : in     Gint := 5);
| Set the spacing between the tree's icon and the additional pixmap. The additional pixmap indicates whether the subtree is opened or closed. The default value is 5 pixels.
    function Get_Spacing
      (Widget             : access Gtk.Ctree.Gtk_Ctree_Record'Class)
       return Gint;
| Return the spacing between the tree's icon and the additional pixmap.
    procedure Set_Show_Stub
      (Ctree              : access Gtk_Ctree_Record;
       Show_Stub          : in     Boolean);
| Set the Show_Stub attribute of Ctree.
    function Get_Show_Stub
      (Ctree              : access Gtk_Ctree_Record)
       return Boolean;
| Return the Show_Stub attribute of Ctree.
    procedure Set_Line_Style
      (Ctree              : access Gtk_Ctree_Record;
       Line_Style         : in     Gtk_Ctree_Line_Style
                           := Ctree_Lines_Solid);
| Change the style of the lines representing the tree of a given Ctree. By default, solid lines are used. See the description of Gtk_Ctree_Line_Style for more details of the possible values.
    function Get_Line_Style
      (Ctree              : access Gtk_Ctree_Record)
       return Gtk_Ctree_Line_Style;
| return the style of the lines representing the tree of a given Ctree.
    procedure Set_Expander_Style
      (Ctree              : access Gtk_Ctree_Record;
       Expander_Style     : in     Gtk_Ctree_Expander_Style
                           := Ctree_Expander_Square);
| Set the way a given Ctree can be expanded. To expand a subtree, you can either double-click on a node, or click on the "+/-" icon. This icon is by default included in a square pixmap. This procedure can change the form of this pixmap. See the description of Gtk_Ctree_Expander_Style for more details.
    function Get_Expander_Style
      (Ctree              : access Gtk_Ctree_Record)
       return Gtk_Ctree_Expander_Style;
| Return the way a given Ctree can be expanded.
    procedure Set_Drag_Compare_Func
      (Ctree              : access Gtk_Ctree_Record;
       Cmp_Func           : in     Gtk_Ctree_Compare_Drag_Func);
| Set the drag compare function of a given Ctree. This function is used when the Ctree receives a dragged data.
### Tree sorting functions
    procedure Sort_Node
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node);
| Sort the nodes of a given Ctree. This procedure only sorts the first level of the tree.
    procedure Sort_Recursive
      (Ctree              : access Gtk_Ctree_Record;
       Node               : in     Gtk_Ctree_Node := null);
| Sort the nodes of a given Ctree recursively. This procedure sorts the whole tree and subtrees associated with Ctree. Set Node to null if you want to sort the whole tree starting from its root.
### Row_Data handling
    procedure Node_Set_Row_Data
      (Ctree              : access Gtk_Ctree_Record'Class;
       Node               : in     Gtk_Ctree_Node;
       Data               : in     Data_Type);
| Associate a Data with a Node.
    function Node_Get_Row_Data
      (Ctree              : access Gtk_Ctree_Record'Class;
       Node               : in     Gtk_Ctree_Node)
       return Data_Type;
| Retrieve a data associated with a Node. Error Handling: Gtkada.Types.Data_Error is raised when trying to retrieve the data from a Node for which no data has been set (using Node_Set_Row_Data).
    function Find_By_Row_Data
      (Ctree              : access Gtk_Ctree_Record'Class;
       Node               : in     Gtk_Ctree_Node;
       Data               : in     Data_Type)
       return Gtk_Ctree_Node;
| Find the first node containing a specified Data. Node is the starting point of the search. If null, the search will start from the root. Return the first Node whose associated data is Data, null if none can be found.
    function Find_All_By_Row_Data
      (Ctree              : access Gtk_Ctree_Record'Class;
       Node               : in     Gtk_Ctree_Node;
       Data               : in     Data_Type)
       return Node_List.Glist;
| Find all nodes containing a specified Data. Node is the starting point of the search. If null, the search will start from the root.
    function Find_By_Row_Data_Custom
      (Ctree              : access Gtk_Ctree_Record'Class;
       Node               : in     Gtk_Ctree_Node;
       Data               : in     Data_Type;
       Func               : in     Gcompare_Func)
       return Gtk_Ctree_Node;
| Find the first node containing a specified Data. Similar to Find_By_Row_Data but Func is used to allow a more flexible (user defined) method to compare two nodes.
    function Find_All_By_Row_Data_Custom
      (Ctree              : access Gtk_Ctree_Record'Class;
       Node               : in     Gtk_Ctree_Node;
       Data               : in     Data_Type;
       Func               : in     Gcompare_Func)
       return Node_List.Glist;
| Find all the nodes containing a specified Data. Similar to Find_All_By_Row_Data but Func is used to allow a more flexible (user defined) method to compare two nodes.
    procedure Post_Recursive
      (Ctree              : access Gtk_Ctree_Record'Class;
       Node               : in     Gtk_Ctree_Node;
       Func               : in     Gtk_Ctree_Func;
       Data               : in     Data_Type_Access);
| Apply Func to each node of a subtree. Node designates the root of the subtree. Data will be passed as a parameter to Func. This procedure will first apply Func to the children nodes.
    procedure Post_Recursive_To_Depth
      (Ctree              : access Gtk_Ctree_Record'Class;
       Node               : in     Gtk_Ctree_Node;
       Depth              : in     Gint;
       Func               : in     Gtk_Ctree_Func;
       Data               : in     Data_Type_Access);
| Apply Func to each node of a subtree until a specified Depth. Node designates the root of the subtree. Data will be passed as a parameter to Func. This function is similar to Post_Recursive except that it stop at a specified subtree depth.
    procedure Pre_Recursive
      (Ctree              : access Gtk_Ctree_Record'Class;
       Node               : in     Gtk_Ctree_Node;
       Func               : in     Gtk_Ctree_Func;
       Data               : in     Data_Type_Access);
| Apply Func to each node of a subtree. Similar to Post_Recursive but will apply Func to the parent before applying it to its children.
    procedure Pre_Recursive_To_Depth
      (Ctree              : access Gtk_Ctree_Record'Class;
       Node               : in     Gtk_Ctree_Node;
       Depth              : in     Gint;
       Func               : in     Gtk_Ctree_Func;
       Data               : in     Data_Type_Access);
| Apply Func to each node of a subtree until a specific Depth. Similar to Post_Recursive_To_Depth but will apply Func to the parent before applying it to its children.

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