GtkTreeSelection
GtkTreeSelection — The selection object for GtkTreeView
Functions
gboolean | (*GtkTreeSelectionFunc) () |
void | (*GtkTreeSelectionForeachFunc) () |
void | gtk_tree_selection_set_mode () |
GtkSelectionMode | gtk_tree_selection_get_mode () |
void | gtk_tree_selection_set_select_function () |
GtkTreeSelectionFunc | gtk_tree_selection_get_select_function () |
gpointer | gtk_tree_selection_get_user_data () |
GtkTreeView * | gtk_tree_selection_get_tree_view () |
gboolean | gtk_tree_selection_get_selected () |
void | gtk_tree_selection_selected_foreach () |
GList * | gtk_tree_selection_get_selected_rows () |
gint | gtk_tree_selection_count_selected_rows () |
void | gtk_tree_selection_select_path () |
void | gtk_tree_selection_unselect_path () |
gboolean | gtk_tree_selection_path_is_selected () |
void | gtk_tree_selection_select_iter () |
void | gtk_tree_selection_unselect_iter () |
gboolean | gtk_tree_selection_iter_is_selected () |
void | gtk_tree_selection_select_all () |
void | gtk_tree_selection_unselect_all () |
void | gtk_tree_selection_select_range () |
void | gtk_tree_selection_unselect_range () |
Properties
GtkSelectionMode | mode | Read / Write |
Signals
void | changed | Run First |
Types and Values
Object Hierarchy
GObject ╰── GtkTreeSelection
Includes
#include <gtk/gtk.h>
Description
The GtkTreeSelection object is a helper object to manage the selection for a GtkTreeView widget. The GtkTreeSelection object is automatically created when a new GtkTreeView widget is created, and cannot exist independently of this widget. The primary reason the GtkTreeSelection objects exists is for cleanliness of code and API. That is, there is no conceptual reason all these functions could not be methods on the GtkTreeView widget instead of a separate function.
The GtkTreeSelection object is gotten from a GtkTreeView by calling gtk_tree_view_get_selection()
. It can be manipulated to check the selection status of the tree, as well as select and deselect individual rows. Selection is done completely view side. As a result, multiple views of the same model can have completely different selections. Additionally, you cannot change the selection of a row on the model that is not currently displayed by the view without expanding its parents first.
One of the important things to remember when monitoring the selection of a view is that the “changed” signal is mostly a hint. That is, it may only emit one signal when a range of rows is selected. Additionally, it may on occasion emit a “changed” signal when nothing has happened (mostly as a result of programmers calling select_row on an already selected row).
Functions
GtkTreeSelectionFunc ()
gboolean (*GtkTreeSelectionFunc) (GtkTreeSelection *selection
,GtkTreeModel *model
,GtkTreePath *path
,gboolean path_currently_selected
,gpointer data
);
A function used by gtk_tree_selection_set_select_function()
to filter whether or not a row may be selected. It is called whenever a row's state might change. A return value of TRUE
indicates to selection
that it is okay to change the selection.
Parameters
selection | ||
model | A GtkTreeModel being viewed | |
path | The GtkTreePath of the row in question | |
path_currently_selected |
| |
data | user data. | [closure] |
Returns
TRUE
, if the selection state of the row can be toggled
GtkTreeSelectionForeachFunc ()
void (*GtkTreeSelectionForeachFunc) (GtkTreeModel *model
,GtkTreePath *path
,GtkTreeIter *iter
,gpointer data
);
A function used by gtk_tree_selection_selected_foreach()
to map all selected rows. It will be called on every selected row in the view.
Parameters
model | The GtkTreeModel being viewed | |
path | The GtkTreePath of a selected row | |
iter | A GtkTreeIter pointing to a selected row | |
data | user data. | [closure] |
gtk_tree_selection_set_mode ()
void gtk_tree_selection_set_mode (GtkTreeSelection *selection
,GtkSelectionMode type
);
Sets the selection mode of the selection
. If the previous type was GTK_SELECTION_MULTIPLE, then the anchor is kept selected, if it was previously selected.
Parameters
selection | ||
type | The selection mode |
gtk_tree_selection_get_mode ()
GtkSelectionMode
gtk_tree_selection_get_mode (GtkTreeSelection *selection
);
Gets the selection mode for selection
. See gtk_tree_selection_set_mode()
.
Parameters
selection |
Returns
the current selection mode
gtk_tree_selection_set_select_function ()
void gtk_tree_selection_set_select_function (GtkTreeSelection *selection
,GtkTreeSelectionFunc func
,gpointer data
,GDestroyNotify destroy
);
Sets the selection function.
If set, this function is called before any node is selected or unselected, giving some control over which nodes are selected. The select function should return TRUE
if the state of the node may be toggled, and FALSE
if the state of the node should be left unchanged.
Parameters
selection | ||
func | The selection function. May be | [nullable] |
data | The selection function’s data. May be | |
destroy | The destroy function for user data. May be |
gtk_tree_selection_get_select_function ()
GtkTreeSelectionFunc
gtk_tree_selection_get_select_function
(GtkTreeSelection *selection
);
Returns the current selection function.
[skip]
Parameters
selection |
Returns
The function.
Since: 2.14
gtk_tree_selection_get_user_data ()
gpointer
gtk_tree_selection_get_user_data (GtkTreeSelection *selection
);
Returns the user data for the selection function.
[skip]
Parameters
selection |
Returns
The user data.
gtk_tree_selection_get_tree_view ()
GtkTreeView *
gtk_tree_selection_get_tree_view (GtkTreeSelection *selection
);
Returns the tree view associated with selection
.
Parameters
selection |
gtk_tree_selection_get_selected ()
gboolean gtk_tree_selection_get_selected (GtkTreeSelection *selection
,GtkTreeModel **model
,GtkTreeIter *iter
);
Sets iter
to the currently selected node if selection
is set to GTK_SELECTION_SINGLE or GTK_SELECTION_BROWSE. iter
may be NULL if you just want to test if selection
has any selected nodes. model
is filled with the current model as a convenience. This function will not work if you use selection
is GTK_SELECTION_MULTIPLE.
Parameters
selection | ||
model | A pointer to set to the GtkTreeModel, or NULL. | [out][allow-none][transfer none] |
iter | The GtkTreeIter, or NULL. | [out][allow-none] |
Returns
TRUE, if there is a selected node.
gtk_tree_selection_selected_foreach ()
void gtk_tree_selection_selected_foreach (GtkTreeSelection *selection
,GtkTreeSelectionForeachFunc func
,gpointer data
);
Calls a function for each selected node. Note that you cannot modify the tree or selection from within this function. As a result, gtk_tree_selection_get_selected_rows()
might be more useful.
Parameters
selection | ||
func | The function to call for each selected node. | [scope call] |
data | user data to pass to the function. |
gtk_tree_selection_get_selected_rows ()
GList * gtk_tree_selection_get_selected_rows (GtkTreeSelection *selection
,GtkTreeModel **model
);
Creates a list of path of all selected rows. Additionally, if you are planning on modifying the model after calling this function, you may want to convert the returned list into a list of GtkTreeRowReferences. To do this, you can use gtk_tree_row_reference_new()
.
To free the return value, use:
g_list_free_full (list, (GDestroyNotify) gtk_tree_path_free);
Parameters
selection | ||
model | A pointer to set to the GtkTreeModel, or | [out][allow-none][transfer none] |
Returns
A GList containing a GtkTreePath for each selected row.
[element-type GtkTreePath][transfer full]
Since: 2.2
gtk_tree_selection_count_selected_rows ()
gint
gtk_tree_selection_count_selected_rows
(GtkTreeSelection *selection
);
Returns the number of rows that have been selected in tree
.
Parameters
selection |
Returns
The number of rows selected.
Since: 2.2
gtk_tree_selection_select_path ()
void gtk_tree_selection_select_path (GtkTreeSelection *selection
,GtkTreePath *path
);
Select the row at path
.
Parameters
selection | ||
path | The GtkTreePath to be selected. |
gtk_tree_selection_unselect_path ()
void gtk_tree_selection_unselect_path (GtkTreeSelection *selection
,GtkTreePath *path
);
Unselects the row at path
.
Parameters
selection | ||
path | The GtkTreePath to be unselected. |
gtk_tree_selection_path_is_selected ()
gboolean gtk_tree_selection_path_is_selected (GtkTreeSelection *selection
,GtkTreePath *path
);
Returns TRUE
if the row pointed to by path
is currently selected. If path
does not point to a valid location, FALSE
is returned
Parameters
selection | ||
path | A GtkTreePath to check selection on. |
Returns
TRUE
if path
is selected.
gtk_tree_selection_select_iter ()
void gtk_tree_selection_select_iter (GtkTreeSelection *selection
,GtkTreeIter *iter
);
Selects the specified iterator.
Parameters
selection | ||
iter | The GtkTreeIter to be selected. |
gtk_tree_selection_unselect_iter ()
void gtk_tree_selection_unselect_iter (GtkTreeSelection *selection
,GtkTreeIter *iter
);
Unselects the specified iterator.
Parameters
selection | ||
iter | The GtkTreeIter to be unselected. |
gtk_tree_selection_iter_is_selected ()
gboolean gtk_tree_selection_iter_is_selected (GtkTreeSelection *selection
,GtkTreeIter *iter
);
Returns TRUE
if the row at iter
is currently selected.
Parameters
selection | ||
iter | A valid GtkTreeIter |
Returns
TRUE
, if iter
is selected
gtk_tree_selection_select_all ()
void
gtk_tree_selection_select_all (GtkTreeSelection *selection
);
Selects all the nodes. selection
must be set to GTK_SELECTION_MULTIPLE mode.
Parameters
selection |
gtk_tree_selection_unselect_all ()
void
gtk_tree_selection_unselect_all (GtkTreeSelection *selection
);
Unselects all the nodes.
Parameters
selection |
gtk_tree_selection_select_range ()
void gtk_tree_selection_select_range (GtkTreeSelection *selection
,GtkTreePath *start_path
,GtkTreePath *end_path
);
Selects a range of nodes, determined by start_path
and end_path
inclusive. selection
must be set to GTK_SELECTION_MULTIPLE mode.
Parameters
selection | ||
start_path | The initial node of the range. | |
end_path | The final node of the range. |
gtk_tree_selection_unselect_range ()
void gtk_tree_selection_unselect_range (GtkTreeSelection *selection
,GtkTreePath *start_path
,GtkTreePath *end_path
);
Unselects a range of nodes, determined by start_path
and end_path
inclusive.
Parameters
selection | ||
start_path | The initial node of the range. | |
end_path | The initial node of the range. |
Since: 2.2
Types and Values
GtkTreeSelection
typedef struct _GtkTreeSelection GtkTreeSelection;
GtkTreeSelectionClass
typedef struct { GObjectClass parent_class; void (* changed) (GtkTreeSelection *selection); } GtkTreeSelectionClass;
Members
| Signal emitted whenever the selection has (possibly) changed. |
Property Details
The “mode”
property
“mode” GtkSelectionMode
Selection mode. See gtk_tree_selection_set_mode()
for more information on this property.
Owner: GtkTreeSelection
Flags: Read / Write
Default value: GTK_SELECTION_SINGLE
Since: 3.2
Signal Details
The “changed”
signal
void user_function (GtkTreeSelection *treeselection, gpointer user_data)
Emitted whenever the selection has (possibly) changed. Please note that this signal is mostly a hint. It may only be emitted once when a range of rows are selected, and it may occasionally be emitted when nothing has happened.
Parameters
treeselection | the object which received the signal. | |
user_data | user data set when the signal handler was connected. |
Flags: Run First
© 2005–2020 The GNOME Project
Licensed under the GNU Lesser General Public License version 2.1 or later.
https://developer.gnome.org/gtk3/3.24/GtkTreeSelection.html