### Class

# Gtk TreeStore

#### Description [src]

    class Gtk.TreeStore : GObject.Object {
      parent: GObject,
      priv: GtkTreeStorePrivate*
    }

A tree-like data structure that can be used with the GtkTreeView

The `GtkTreeStore` object is a list model for use with a `GtkTreeView` widget. It implements the `GtkTreeModel` interface, and consequently, can use all of the methods available there. It also implements the `GtkTreeSortable` interface so it can be sorted by the view. Finally, it also implements the tree [drag and drop][gtk3-GtkTreeView-drag-and-drop] interfaces.

# GtkTreeStore as GtkBuildable

The GtkTreeStore implementation of the `GtkBuildable` interface allows to specify the model columns with a element that may contain multiple elements, each specifying one model column. The “type” attribute specifies the data type for the column.

An example of a UI Definition fragment for a tree store: “`

“`.

#### Hierarchy

#### Ancestors

- GObject

#### Implements

- GtkBuildable
- GtkTreeDragDest
- GtkTreeDragSource
- GtkTreeModel
- GtkTreeSortable

#### Constructors

###### gtk_tree_store_new

Creates a new tree store as with `n_columns` columns each of the types passed in. Note that only types derived from standard GObject fundamental types are supported.

###### gtk_tree_store_newv

Non vararg creation function. Used primarily by language bindings.

#### Instance methods

###### gtk_tree_store_append

Appends a new row to `tree_store`. If `parent` is non-`NULL`, then it will append the new row after the last child of `parent`, otherwise it will append a row to the top level. `iter` will be changed to point to this new row. The row will be empty after this function is called. To fill in values, you need to call gtk_tree_store_set() or gtk_tree_store_set_value().

###### gtk_tree_store_clear

Removes all rows from `tree_store`.

###### gtk_tree_store_insert

Creates a new row at `position`. If parent is non-`NULL`, then the row will be made a child of `parent`. Otherwise, the row will be created at the toplevel. If `position` is -1 or is larger than the number of rows at that level, then the new row will be inserted to the end of the list. `iter` will be changed to point to this new row. The row will be empty after this function is called. To fill in values, you need to call gtk_tree_store_set() or gtk_tree_store_set_value().

###### gtk_tree_store_insert_after

Inserts a new row after `sibling`. If `sibling` is `NULL`, then the row will be prepended to `parent` ’s children. If `parent` and `sibling` are `NULL`, then the row will be prepended to the toplevel. If both `sibling` and `parent` are set, then `parent` must be the parent of `sibling`. When `sibling` is set, `parent` is optional.

###### gtk_tree_store_insert_before

Inserts a new row before `sibling`. If `sibling` is `NULL`, then the row will be appended to `parent` ’s children. If `parent` and `sibling` are `NULL`, then the row will be appended to the toplevel. If both `sibling` and `parent` are set, then `parent` must be the parent of `sibling`. When `sibling` is set, `parent` is optional.

###### gtk_tree_store_insert_with_values

Creates a new row at `position`. `iter` will be changed to point to this new row. If `position` is -1, or larger than the number of rows on the list, then the new row will be appended to the list. The row will be filled with the values given to this function.

###### gtk_tree_store_insert_with_valuesv

A variant of gtk_tree_store_insert_with_values() which takes the columns and values as two arrays, instead of varargs. This function is mainly intended for language bindings.

###### gtk_tree_store_is_ancestor

Returns `TRUE` if `iter` is an ancestor of `descendant`. That is, `iter` is the parent (or grandparent or great-grandparent) of `descendant`.

###### gtk_tree_store_iter_depth

Returns the depth of `iter`. This will be 0 for anything on the root level, 1 for anything down a level, etc.

###### gtk_tree_store_iter_is_valid

purposes.

###### gtk_tree_store_move_after

Moves `iter` in `tree_store` to the position after `position`. `iter` and `position` should be in the same level. Note that this function only works with unsorted stores. If `position` is `NULL`, `iter` will be moved to the start of the level.

###### gtk_tree_store_move_before

Moves `iter` in `tree_store` to the position before `position`. `iter` and `position` should be in the same level. Note that this function only works with unsorted stores. If `position` is `NULL`, `iter` will be moved to the end of the level.

###### gtk_tree_store_prepend

Prepends a new row to `tree_store`. If `parent` is non-`NULL`, then it will prepend the new row before the first child of `parent`, otherwise it will prepend a row to the top level. `iter` will be changed to point to this new row. The row will be empty after this function is called. To fill in values, you need to call gtk_tree_store_set() or gtk_tree_store_set_value().

###### gtk_tree_store_remove

Removes `iter` from `tree_store`. After being removed, `iter` is set to the next valid row at that level, or invalidated if it previously pointed to the last one.

###### gtk_tree_store_reorder

Reorders the children of `parent` in `tree_store` to follow the order indicated by `new_order`. Note that this function only works with unsorted stores.

###### gtk_tree_store_set

Sets the value of one or more cells in the row referenced by `iter`. The variable argument list should contain integer column numbers, each column number followed by the value to be set. The list is terminated by a -1. For example, to set column 0 with type `G_TYPE_STRING` to “Foo”, you would write `gtk_tree_store_set (store, iter, 0, "Foo", -1)`.

###### gtk_tree_store_set_column_types

This function is meant primarily for `GObjects` that inherit from `GtkTreeStore`, and should only be used when constructing a new `GtkTreeStore`. It will not function after a row has been added, or a method on the `GtkTreeModel` interface is called.

###### gtk_tree_store_set_valist

See gtk_tree_store_set(); this version takes a va_list for use by language bindings.

###### gtk_tree_store_set_value

Sets the data in the cell specified by `iter` and `column`. The type of `value` must be convertible to the type of the column.

###### gtk_tree_store_set_valuesv

A variant of gtk_tree_store_set_valist() which takes the columns and values as two arrays, instead of varargs. This function is mainly intended for language bindings or in case the number of columns to change is not known until run-time.

###### gtk_tree_store_swap

Swaps `a` and `b` in the same level of `tree_store`. Note that this function only works with unsorted stores.

##### Methods inherited from GtkBuildable (1)

###### gtk_buildable_get_buildable_id

Gets the ID of the `buildable` object.

##### Methods inherited from GtkTreeDragDest (2)

###### gtk_tree_drag_dest_drag_data_received

Asks the `GtkTreeDragDest` to insert a row before the path `dest`, deriving the contents of the row from `value`. If `dest` is outside the tree so that inserting before it is impossible, `FALSE` will be returned. Also, `FALSE` may be returned if the new row is not created for some model-specific reason. Should robustly handle a `dest` no longer found in the model!.

###### gtk_tree_drag_dest_row_drop_possible

Determines whether a drop is possible before the given `dest_path`, at the same depth as `dest_path`. i.e., can we drop the data in `value` at that location. `dest_path` does not have to exist; the return value will almost certainly be `FALSE` if the parent of `dest_path` doesn’t exist, though.

##### Methods inherited from GtkTreeDragSource (3)

###### gtk_tree_drag_source_drag_data_delete

Asks the `GtkTreeDragSource` to delete the row at `path`, because it was moved somewhere else via drag-and-drop. Returns `FALSE` if the deletion fails because `path` no longer exists, or for some model-specific reason. Should robustly handle a `path` no longer found in the model!.

###### gtk_tree_drag_source_drag_data_get

Asks the `GtkTreeDragSource` to return a `GdkContentProvider` representing the row at `path`. Should robustly handle a `path` no longer found in the model!.

###### gtk_tree_drag_source_row_draggable

Asks the `GtkTreeDragSource` whether a particular row can be used as the source of a DND operation. If the source doesn’t implement this interface, the row is assumed draggable.

##### Methods inherited from GtkTreeModel (28)

##### Methods inherited from GtkTreeSortable (6)

###### gtk_tree_sortable_get_sort_column_id

Fills in `sort_column_id` and `order` with the current sort column and the order. It returns `TRUE` unless the `sort_column_id` is `GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID` or `GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID`.

###### gtk_tree_sortable_has_default_sort_func

Returns `TRUE` if the model has a default sort function. This is used primarily by GtkTreeViewColumns in order to determine if a model can go back to the default state, or not.

###### gtk_tree_sortable_set_default_sort_func

Sets the default comparison function used when sorting to be `sort_func`. If the current sort column id of `sortable` is `GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID`, then the model will sort using this function.

###### gtk_tree_sortable_set_sort_column_id

Sets the current sort column to be `sort_column_id`. The `sortable` will resort itself to reflect this change, after emitting a `GtkTreeSortable::sort-column-changed` signal. `sort_column_id` may either be a regular column id, or one of the following special values:.

###### gtk_tree_sortable_set_sort_func

Sets the comparison function used when sorting to be `sort_func`. If the current sort column id of `sortable` is the same as `sort_column_id`, then the model will sort using this function.

###### gtk_tree_sortable_sort_column_changed

Emits a `GtkTreeSortable::sort-column-changed` signal on `sortable`.

#### Class structure

    struct GtkTreeStoreClass {
      GObjectClass parent_class;

    }

###### Class members

`parent_class` |
    GObjectClass
| No description available.