## GtkTree

GtkTree — A tree widget

## Functions

#define | GTK_IS_ROOT_TREE ()
#define | GTK_TREE_ROOT_TREE ()
#define | GTK_TREE_SELECTION_OLD ()
GtkWidget * | gtk_tree_new ()
void | gtk_tree_append ()
void | gtk_tree_prepend ()
void | gtk_tree_insert ()
void | gtk_tree_remove_items ()
void | gtk_tree_clear_items ()
void | gtk_tree_select_item ()
void | gtk_tree_unselect_item ()
void | gtk_tree_select_child ()
void | gtk_tree_unselect_child ()
gint | gtk_tree_child_position ()
void | gtk_tree_set_selection_mode ()
void | gtk_tree_set_view_mode ()
void | gtk_tree_set_view_lines ()
void | gtk_tree_remove_item ()

## Signals

void | select-child | Run First
void | selection-changed | Run First
void | unselect-child | Run First

## Types and Values

struct | GtkTree
enum | GtkTreeViewMode

## Object Hierarchy

        GObject
        ╰── GInitiallyUnowned
            ╰── GtkObject
                ╰── GtkWidget
                    ╰── GtkContainer
                        ╰── GtkTree

## Implemented Interfaces

GtkTree implements AtkImplementorIface and GtkBuildable.

## Includes

    #include <gtk/gtk.h>

## Description

GtkTree is deprecated and unsupported. It is known to be buggy. To use it, you must define the symbol `GTK_ENABLE_BROKEN` prior to including the GTK+ header files. Use GtkTreeView instead.

The GtkTree widget is a container that shows users a list of items, in a tree format complete with branches and leafnodes. Branches can be expanded to show their child items, or collapsed to hide them.

## Functions

### GTK_IS_ROOT_TREE()

    #define GTK_IS_ROOT_TREE(obj)   ((GtkObject*) GTK_TREE(obj)->root_tree == (GtkObject*)obj)

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

A macro that returns a boolean value which indicates if `obj` is a root tree or not.

#### Parameters

obj | A pointer to the GtkTree. `obj` will accept any pointer, but if the pointer does not point to a GtkTree, the results are undefined. |

### GTK_TREE_ROOT_TREE()

    #define GTK_TREE_ROOT_TREE(obj) (GTK_TREE(obj)->root_tree ? GTK_TREE(obj)->root_tree : GTK_TREE(obj))

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

A macro that returns the root tree of `obj`.

If `obj` is already a root tree, `obj` is cast to GtkTree and returned.

#### Parameters

obj | A pointer to the GtkTree. `obj` will accept any pointer, but if the pointer does not point to a GtkTree, the results are undefined. |

### GTK_TREE_SELECTION_OLD()

    #define GTK_TREE_SELECTION_OLD(obj) (GTK_TREE_ROOT_TREE(obj)->selection)

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

### gtk_tree_new ()

    GtkWidget *
    gtk_tree_new (void);

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

Creates a new GtkTree.

#### Returns

A pointer to the newly allocated widget.

### gtk_tree_append ()

    void
    gtk_tree_append (GtkTree *tree,
                     GtkWidget *tree_item);

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

Adds the GtkTreeItem in `tree_item` to the end of the items in `tree`.

#### Parameters

tree | A pointer to a GtkTree. |
tree_item | A pointer to the GtkWidget that is to be appended to the tree. |

### gtk_tree_prepend ()

    void
    gtk_tree_prepend (GtkTree *tree,
                      GtkWidget *tree_item);

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

Adds the GtkTreeItem in `tree_item` to the start of the items in `tree`.

#### Parameters

tree | A pointer to a GtkTree. |
tree_item | A pointer to the GtkWidget that is to be prepended to the tree. |

### gtk_tree_insert ()

    void
    gtk_tree_insert (GtkTree *tree,
                     GtkWidget *tree_item,
                     gint position);

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

Adds the GtkTreeItem in `tree_item` to the list of items in `tree` at the position indicated by `position`.

#### Parameters

tree | A pointer to a GtkTree. |
tree_item | A pointer to the GtkWidget that is to be added to the tree. |
position | A gint that indicates the position in the tree, that the `tree_item` is to be added at. |

### gtk_tree_remove_items ()

    void
    gtk_tree_remove_items (GtkTree *tree,
                           GList *items);

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

Removes a list of items from the GtkTree in `tree`.

If only one item is to be removed from the GtkTree, `gtk_container_remove()` can be used instead.

Removing an item from a GtkTree dereferences the item, and thus usually destroys the item and any subtrees it may contain. If the item is not to be destroyed, use `g_object_ref()` before removing it.

#### Parameters

tree | A pointer to a GtkTree. |
items | A pointer to a GList that contains the items to be removed. |

### gtk_tree_clear_items ()

    void
    gtk_tree_clear_items (GtkTree *tree,
                          gint start,
                          gint end);

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

Removes the items at positions between `start` and `end` from the GtkTree `tree`.

Removing an item from a GtkTree dereferences the item, and thus usually destroys the item and any subtrees it may contain. If the item is not to be destroyed, use `g_object_ref()` before removing it.

#### Parameters

tree | A pointer to a GtkTree. |
start | A gint. |
end | A gint. |

### gtk_tree_select_item ()

    void
    gtk_tree_select_item (GtkTree *tree,
                          gint item);

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

Emits the select_item signal for the child at position `item`, and thus selects it (unless it is unselected in a signal handler).

#### Parameters

tree | A pointer to a GtkTree. |
item | A gint. |

### gtk_tree_unselect_item ()

    void
    gtk_tree_unselect_item (GtkTree *tree,
                            gint item);

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

Emits the unselect_item for the child at position `item`, and thus unselects it.

#### Parameters

tree | A pointer to a GtkTree. |
item | A gint. |

### gtk_tree_select_child ()

    void
    gtk_tree_select_child (GtkTree *tree,
                           GtkWidget *tree_item);

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

Emits the select_item signal for the child `tree_item`, and thus selects it (unless it is unselected in a signal handler).

#### Parameters

tree | A pointer to a GtkTree. |
tree_item | A pointer to the GtkWidget that is to be selected. |

### gtk_tree_unselect_child ()

    void
    gtk_tree_unselect_child (GtkTree *tree,
                             GtkWidget *tree_item);

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

Emits the unselect_item signal for the child `tree_item`, and thus unselects it.

#### Parameters

tree | A pointer to a GtkTree. |
tree_item | A pointer to the GtkWidget that is to be selected. |

### gtk_tree_child_position ()

    gint
    gtk_tree_child_position (GtkTree *tree,
                             GtkWidget *child);

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

Returns the position of `child` in the GtkTree `tree`.

If `child` is not a child of `tree`, then -1 is returned.

#### Parameters

tree | A pointer to a GtkTree. |
child | A pointer to a GtkWidget. |

#### Returns

A gint.

### gtk_tree_set_selection_mode ()

    void
    gtk_tree_set_selection_mode (GtkTree *tree,
                                 GtkSelectionMode mode);

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

Sets the selection mode for the GtkTree `tree`.

`mode` can be one of

- `GTK_SELECTION_SINGLE` for when only one item can be selected at a time.

- `GTK_SELECTION_BROWSE` for when one item must be selected.

- `GTK_SELECTION_MULTIPLE` for when many items can be selected at once.

- `GTK_SELECTION_EXTENDED` Reserved for later use.

The selection mode is only defined for a root tree, as the root tree "owns" the selection.

The default mode is `GTK_SELECTION_SINGLE`.

#### Parameters

tree | A pointer to a GtkTree. |
mode | A GtkSelectionMode. |

### gtk_tree_set_view_mode ()

    void
    gtk_tree_set_view_mode (GtkTree *tree,
                            GtkTreeViewMode mode);

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

Sets the 'viewmode' for the GtkTree in `tree`. The 'viewmode' defines how the tree looks when an item is selected.

`mode` can be one of:

- `GTK_TREE_VIEW_LINE` : When an item is selected the entire GtkTreeItem is highlighted.

- `GTK_TREE_VIEW_ITEM` : When an item is selected only the selected item's child widget is highlighted.

The default mode is `GTK_TREE_VIEW_LINE`.

#### Parameters

tree | A pointer to a GtkTree. |
mode | A GtkTreeViewMode. |

### gtk_tree_set_view_lines ()

    void
    gtk_tree_set_view_lines (GtkTree *tree,
                             gboolean flag);

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

Sets whether or not the connecting lines between branches and children are drawn.

#### Parameters

tree | A pointer to a GtkTree. |
flag | A guint, indicating `TRUE`, or `FALSE`. |

### gtk_tree_remove_item ()

    void
    gtk_tree_remove_item (GtkTree *tree,
                          GtkWidget *child);

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

Removes the item `child` from the GtkTree `tree`.

#### Parameters

tree | A pointer to a GtkTree. |
child | A pointer to the GtkWidget that is to be removed from the tree. |

## Types and Values

### struct GtkTree

    struct GtkTree;

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

    struct _GtkTree
    {
      GtkContainer container;
      GList *children;
      GtkTree* root_tree; /* owner of selection list */
      GtkWidget* tree_owner;
      GList *selection;
      guint level;
      guint indent_value;
      guint current_indent;
      guint selection_mode : 2;
      guint view_mode : 1;
      guint view_line : 1;
    };

### enum GtkTreeViewMode

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

#### Members

GTK_TREE_VIEW_LINE |  |
GTK_TREE_VIEW_ITEM |  |

## Signal Details

### The `“select-child”` signal

    void
    user_function (GtkTree   *tree,
                   GtkWidget *widget,
                   gpointer   user_data)

This signal is emitted by `tree` whenever `widget` is about to be selected.

#### Parameters

tree | the object which received the signal. |
widget | The child that is about to be selected. |
user_data | user data set when the signal handler was connected. |

Flags: Run First

### The `“selection-changed”` signal

    void
    user_function (GtkTree *tree,
                   gpointer user_data)

This signal is emitted by the root tree whenever the selection changes.

#### Parameters

tree | the object which received the signal. |
user_data | user data set when the signal handler was connected. |

Flags: Run First

### The `“unselect-child”` signal

    void
    user_function (GtkTree   *tree,
                   GtkWidget *widget,
                   gpointer   user_data)

This signal is emitted by `tree` whenever `widget` is about to be unselected.

#### Parameters

tree | the object which received the signal. |
widget | The child that is about to be unselected. |
user_data | user data set when the signal handler was connected. |

Flags: Run First

## See Also

GtkTreeList for the items to put into a GtkTree.

GtkScrolledWindow for details on how to scroll around a GtkTree.