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gtk2/gtk/gtktreeselection.c
Benjamin Otte 3112679a5e treeview: Signal selection changes to the accessible 
And another signal gone.
2011-12-16 04:53:15 +01:00

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/* gtktreeselection.h
* Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include "gtktreeselection.h"
#include "gtktreeprivate.h"
#include "gtkrbtree.h"
#include "gtkmarshalers.h"
#include "gtkintl.h"
#include "gtktypebuiltins.h"
#include "a11y/gtktreeviewaccessible.h"
/**
* SECTION:gtktreeselection
* @Short_description: The selection object for GtkTreeView
* @Title: GtkTreeSelection
* @See_also: #GtkTreeView, #GtkTreeViewColumn, #GtkTreeDnd, #GtkTreeMode,
* #GtkTreeSortable, #GtkTreeModelSort, #GtkListStore, #GtkTreeStore,
* #GtkCellRenderer, #GtkCellEditable, #GtkCellRendererPixbuf,
* #GtkCellRendererText, #GtkCellRendererToggle
*
* 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 independentally 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 #GtkTreeSelection::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 #GtkTreeSelection::changed signal
* when nothing has happened (mostly as a result of programmers calling
* select_row on an already selected row).
*/
struct _GtkTreeSelectionPrivate
{
GtkTreeView *tree_view;
GtkSelectionMode type;
GtkTreeSelectionFunc user_func;
gpointer user_data;
GDestroyNotify destroy;
};
static void gtk_tree_selection_finalize (GObject *object);
static gint gtk_tree_selection_real_select_all (GtkTreeSelection *selection);
static gint gtk_tree_selection_real_unselect_all (GtkTreeSelection *selection);
static gint gtk_tree_selection_real_select_node (GtkTreeSelection *selection,
GtkRBTree *tree,
GtkRBNode *node,
gboolean select);
static void gtk_tree_selection_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_tree_selection_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
enum
{
PROP_0,
PROP_MODE,
N_PROPERTIES
};
enum
{
CHANGED,
LAST_SIGNAL
};
static GParamSpec *properties[N_PROPERTIES];
static guint tree_selection_signals [LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GtkTreeSelection, gtk_tree_selection, G_TYPE_OBJECT)
static void
gtk_tree_selection_class_init (GtkTreeSelectionClass *class)
{
GObjectClass *object_class;
object_class = (GObjectClass*) class;
object_class->finalize = gtk_tree_selection_finalize;
object_class->set_property = gtk_tree_selection_set_property;
object_class->get_property = gtk_tree_selection_get_property;
class->changed = NULL;
/* Properties */
/**
* GtkTreeSelection:mode:
*
* Selection mode.
* See gtk_tree_selection_set_mode() for more information on this property.
*
* Since: 3.2
*/
properties[PROP_MODE] = g_param_spec_enum ("mode",
P_("Mode"),
P_("Selection mode"),
GTK_TYPE_SELECTION_MODE,
GTK_SELECTION_SINGLE,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS);
/* Install all properties */
g_object_class_install_properties (object_class, N_PROPERTIES, properties);
/* Signals */
/**
* GtkTreeSelection::changed:
* @treeselection: the object which received the signal.
*
* 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.
*/
tree_selection_signals[CHANGED] =
g_signal_new (I_("changed"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkTreeSelectionClass, changed),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
g_type_class_add_private (class, sizeof (GtkTreeSelectionPrivate));
}
static void
gtk_tree_selection_init (GtkTreeSelection *selection)
{
GtkTreeSelectionPrivate *priv;
selection->priv = G_TYPE_INSTANCE_GET_PRIVATE (selection,
GTK_TYPE_TREE_SELECTION,
GtkTreeSelectionPrivate);
priv = selection->priv;
priv->type = GTK_SELECTION_SINGLE;
}
static void
gtk_tree_selection_finalize (GObject *object)
{
GtkTreeSelection *selection = GTK_TREE_SELECTION (object);
GtkTreeSelectionPrivate *priv = selection->priv;
if (priv->destroy)
priv->destroy (priv->user_data);
/* chain parent_class' handler */
G_OBJECT_CLASS (gtk_tree_selection_parent_class)->finalize (object);
}
static void
gtk_tree_selection_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
g_return_if_fail (GTK_IS_TREE_SELECTION (object));
switch (prop_id)
{
case PROP_MODE:
gtk_tree_selection_set_mode (GTK_TREE_SELECTION (object), g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_tree_selection_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
g_return_if_fail (GTK_IS_TREE_SELECTION (object));
switch (prop_id)
{
case PROP_MODE:
g_value_set_enum (value, gtk_tree_selection_get_mode (GTK_TREE_SELECTION (object)));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* _gtk_tree_selection_new:
*
* Creates a new #GtkTreeSelection object. This function should not be invoked,
* as each #GtkTreeView will create its own #GtkTreeSelection.
*
* Return value: A newly created #GtkTreeSelection object.
**/
GtkTreeSelection*
_gtk_tree_selection_new (void)
{
GtkTreeSelection *selection;
selection = g_object_new (GTK_TYPE_TREE_SELECTION, NULL);
return selection;
}
/**
* _gtk_tree_selection_new_with_tree_view:
* @tree_view: The #GtkTreeView.
*
* Creates a new #GtkTreeSelection object. This function should not be invoked,
* as each #GtkTreeView will create its own #GtkTreeSelection.
*
* Return value: A newly created #GtkTreeSelection object.
**/
GtkTreeSelection*
_gtk_tree_selection_new_with_tree_view (GtkTreeView *tree_view)
{
GtkTreeSelection *selection;
g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), NULL);
selection = _gtk_tree_selection_new ();
_gtk_tree_selection_set_tree_view (selection, tree_view);
return selection;
}
/**
* _gtk_tree_selection_set_tree_view:
* @selection: A #GtkTreeSelection.
* @tree_view: The #GtkTreeView.
*
* Sets the #GtkTreeView of @selection. This function should not be invoked, as
* it is used internally by #GtkTreeView.
**/
void
_gtk_tree_selection_set_tree_view (GtkTreeSelection *selection,
GtkTreeView *tree_view)
{
GtkTreeSelectionPrivate *priv;
g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
if (tree_view != NULL)
g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
priv = selection->priv;
priv->tree_view = tree_view;
}
/**
* gtk_tree_selection_set_mode:
* @selection: A #GtkTreeSelection.
* @type: The selection mode
*
* 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.
**/
void
gtk_tree_selection_set_mode (GtkTreeSelection *selection,
GtkSelectionMode type)
{
GtkTreeSelectionPrivate *priv;
GtkTreeSelectionFunc tmp_func;
g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
priv = selection->priv;
if (priv->type == type)
return;
if (type == GTK_SELECTION_NONE)
{
/* We do this so that we unconditionally unset all rows
*/
tmp_func = priv->user_func;
priv->user_func = NULL;
gtk_tree_selection_unselect_all (selection);
priv->user_func = tmp_func;
_gtk_tree_view_set_anchor_path (priv->tree_view, NULL);
}
else if (type == GTK_SELECTION_SINGLE ||
type == GTK_SELECTION_BROWSE)
{
GtkRBTree *tree = NULL;
GtkRBNode *node = NULL;
gint selected = FALSE;
GtkTreePath *anchor_path = NULL;
anchor_path = _gtk_tree_view_get_anchor_path (priv->tree_view);
if (anchor_path)
{
_gtk_tree_view_find_node (priv->tree_view,
anchor_path,
&tree,
&node);
if (node && GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
selected = TRUE;
}
/* We do this so that we unconditionally unset all rows
*/
tmp_func = priv->user_func;
priv->user_func = NULL;
gtk_tree_selection_unselect_all (selection);
priv->user_func = tmp_func;
if (node && selected)
_gtk_tree_selection_internal_select_node (selection,
node,
tree,
anchor_path,
0,
FALSE);
if (anchor_path)
gtk_tree_path_free (anchor_path);
}
priv->type = type;
g_object_notify_by_pspec (G_OBJECT (selection), properties[PROP_MODE]);
}
/**
* gtk_tree_selection_get_mode:
* @selection: a #GtkTreeSelection
*
* Gets the selection mode for @selection. See
* gtk_tree_selection_set_mode().
*
* Return value: the current selection mode
**/
GtkSelectionMode
gtk_tree_selection_get_mode (GtkTreeSelection *selection)
{
g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), GTK_SELECTION_SINGLE);
return selection->priv->type;
}
/**
* gtk_tree_selection_set_select_function:
* @selection: A #GtkTreeSelection.
* @func: The selection function. May be %NULL
* @data: The selection function's data. May be %NULL
* @destroy: The destroy function for user data. May be %NULL
*
* 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.
*/
void
gtk_tree_selection_set_select_function (GtkTreeSelection *selection,
GtkTreeSelectionFunc func,
gpointer data,
GDestroyNotify destroy)
{
GtkTreeSelectionPrivate *priv;
g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
priv = selection->priv;
if (priv->destroy)
priv->destroy (priv->user_data);
priv->user_func = func;
priv->user_data = data;
priv->destroy = destroy;
}
/**
* gtk_tree_selection_get_select_function: (skip)
* @selection: A #GtkTreeSelection.
*
* Returns the current selection function.
*
* Return value: The function.
*
* Since: 2.14
**/
GtkTreeSelectionFunc
gtk_tree_selection_get_select_function (GtkTreeSelection *selection)
{
g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), NULL);
return selection->priv->user_func;
}
/**
* gtk_tree_selection_get_user_data: (skip)
* @selection: A #GtkTreeSelection.
*
* Returns the user data for the selection function.
*
* Return value: The user data.
**/
gpointer
gtk_tree_selection_get_user_data (GtkTreeSelection *selection)
{
g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), NULL);
return selection->priv->user_data;
}
/**
* gtk_tree_selection_get_tree_view:
* @selection: A #GtkTreeSelection
*
* Returns the tree view associated with @selection.
*
* Return value: (transfer none): A #GtkTreeView
**/
GtkTreeView *
gtk_tree_selection_get_tree_view (GtkTreeSelection *selection)
{
g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), NULL);
return selection->priv->tree_view;
}
/**
* gtk_tree_selection_get_selected:
* @selection: A #GtkTreeSelection.
* @model: (out) (allow-none) (transfer none): A pointer to set to the #GtkTreeModel, or NULL.
* @iter: (out) (allow-none): The #GtkTreeIter, or NULL.
*
* 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.
*
* Return value: TRUE, if there is a selected node.
**/
gboolean
gtk_tree_selection_get_selected (GtkTreeSelection *selection,
GtkTreeModel **model,
GtkTreeIter *iter)
{
GtkTreeSelectionPrivate *priv;
GtkRBTree *tree;
GtkRBNode *node;
GtkTreePath *anchor_path;
gboolean retval;
gboolean found_node;
g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), FALSE);
priv = selection->priv;
g_return_val_if_fail (priv->type != GTK_SELECTION_MULTIPLE, FALSE);
g_return_val_if_fail (priv->tree_view != NULL, FALSE);
/* Clear the iter */
if (iter)
memset (iter, 0, sizeof (GtkTreeIter));
if (model)
*model = gtk_tree_view_get_model (priv->tree_view);
anchor_path = _gtk_tree_view_get_anchor_path (priv->tree_view);
if (anchor_path == NULL)
return FALSE;
retval = FALSE;
found_node = !_gtk_tree_view_find_node (priv->tree_view,
anchor_path,
&tree,
&node);
if (found_node && GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
{
/* we only want to return the anchor if it exists in the rbtree and
* is selected.
*/
if (iter == NULL)
retval = TRUE;
else
retval = gtk_tree_model_get_iter (gtk_tree_view_get_model (priv->tree_view),
iter,
anchor_path);
}
else
{
/* We don't want to return the anchor if it isn't actually selected.
*/
retval = FALSE;
}
gtk_tree_path_free (anchor_path);
return retval;
}
/**
* gtk_tree_selection_get_selected_rows:
* @selection: A #GtkTreeSelection.
* @model: (out) (allow-none) (transfer none): A pointer to set to the #GtkTreeModel, or %NULL.
*
* 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 #GtkTreeRowReference<!-- -->s.
* 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);
* ]|
*
* Return value: (element-type GtkTreePath) (transfer full): A #GList containing a #GtkTreePath for each selected row.
*
* Since: 2.2
**/
GList *
gtk_tree_selection_get_selected_rows (GtkTreeSelection *selection,
GtkTreeModel **model)
{
GtkTreeSelectionPrivate *priv;
GList *list = NULL;
GtkRBTree *tree = NULL;
GtkRBNode *node = NULL;
GtkTreePath *path;
g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), NULL);
priv = selection->priv;
g_return_val_if_fail (priv->tree_view != NULL, NULL);
if (model)
*model = gtk_tree_view_get_model (priv->tree_view);
tree = _gtk_tree_view_get_rbtree (priv->tree_view);
if (tree == NULL || tree->root == NULL)
return NULL;
if (priv->type == GTK_SELECTION_NONE)
return NULL;
else if (priv->type != GTK_SELECTION_MULTIPLE)
{
GtkTreeIter iter;
if (gtk_tree_selection_get_selected (selection, NULL, &iter))
{
GtkTreePath *path;
path = gtk_tree_model_get_path (gtk_tree_view_get_model (priv->tree_view), &iter);
list = g_list_append (list, path);
return list;
}
return NULL;
}
node = _gtk_rbtree_first (tree);
path = gtk_tree_path_new_first ();
do
{
if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
list = g_list_prepend (list, gtk_tree_path_copy (path));
if (node->children)
{
tree = node->children;
node = _gtk_rbtree_first (tree);
gtk_tree_path_append_index (path, 0);
}
else
{
gboolean done = FALSE;
do
{
node = _gtk_rbtree_next (tree, node);
if (node != NULL)
{
done = TRUE;
gtk_tree_path_next (path);
}
else
{
node = tree->parent_node;
tree = tree->parent_tree;
if (!tree)
{
gtk_tree_path_free (path);
goto done;
}
gtk_tree_path_up (path);
}
}
while (!done);
}
}
while (TRUE);
gtk_tree_path_free (path);
done:
return g_list_reverse (list);
}
static void
gtk_tree_selection_count_selected_rows_helper (GtkRBTree *tree,
GtkRBNode *node,
gpointer data)
{
gint *count = (gint *)data;
if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
(*count)++;
if (node->children)
_gtk_rbtree_traverse (node->children, node->children->root,
G_PRE_ORDER,
gtk_tree_selection_count_selected_rows_helper, data);
}
/**
* gtk_tree_selection_count_selected_rows:
* @selection: A #GtkTreeSelection.
*
* Returns the number of rows that have been selected in @tree.
*
* Return value: The number of rows selected.
*
* Since: 2.2
**/
gint
gtk_tree_selection_count_selected_rows (GtkTreeSelection *selection)
{
GtkTreeSelectionPrivate *priv;
gint count = 0;
GtkRBTree *tree;
g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), 0);
priv = selection->priv;
g_return_val_if_fail (priv->tree_view != NULL, 0);
tree = _gtk_tree_view_get_rbtree (priv->tree_view);
if (tree == NULL || tree->root == NULL)
return 0;
if (priv->type == GTK_SELECTION_SINGLE ||
priv->type == GTK_SELECTION_BROWSE)
{
if (gtk_tree_selection_get_selected (selection, NULL, NULL))
return 1;
else
return 0;
}
_gtk_rbtree_traverse (tree, tree->root,
G_PRE_ORDER,
gtk_tree_selection_count_selected_rows_helper,
&count);
return count;
}
/* gtk_tree_selection_selected_foreach helper */
static void
model_changed (gpointer data)
{
gboolean *stop = (gboolean *)data;
*stop = TRUE;
}
/**
* gtk_tree_selection_selected_foreach:
* @selection: A #GtkTreeSelection.
* @func: (scope call): The function to call for each selected node.
* @data: user data to pass to the function.
*
* 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.
**/
void
gtk_tree_selection_selected_foreach (GtkTreeSelection *selection,
GtkTreeSelectionForeachFunc func,
gpointer data)
{
GtkTreeSelectionPrivate *priv;
GtkTreePath *path;
GtkRBTree *tree;
GtkRBNode *node;
GtkTreeIter iter;
GtkTreeModel *model;
gulong inserted_id, deleted_id, reordered_id, changed_id;
gboolean stop = FALSE;
g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
priv = selection->priv;
g_return_if_fail (priv->tree_view != NULL);
tree = _gtk_tree_view_get_rbtree (priv->tree_view);
if (func == NULL || tree == NULL || tree->root == NULL)
return;
model = gtk_tree_view_get_model (priv->tree_view);
if (priv->type == GTK_SELECTION_SINGLE ||
priv->type == GTK_SELECTION_BROWSE)
{
path = _gtk_tree_view_get_anchor_path (priv->tree_view);
if (path)
{
gtk_tree_model_get_iter (model, &iter, path);
(* func) (model, path, &iter, data);
gtk_tree_path_free (path);
}
return;
}
node = _gtk_rbtree_first (tree);
g_object_ref (model);
/* connect to signals to monitor changes in treemodel */
inserted_id = g_signal_connect_swapped (model, "row-inserted",
G_CALLBACK (model_changed),
&stop);
deleted_id = g_signal_connect_swapped (model, "row-deleted",
G_CALLBACK (model_changed),
&stop);
reordered_id = g_signal_connect_swapped (model, "rows-reordered",
G_CALLBACK (model_changed),
&stop);
changed_id = g_signal_connect_swapped (priv->tree_view, "notify::model",
G_CALLBACK (model_changed),
&stop);
/* find the node internally */
path = gtk_tree_path_new_first ();
do
{
if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
{
gtk_tree_model_get_iter (model, &iter, path);
(* func) (model, path, &iter, data);
}
if (stop)
goto out;
if (node->children)
{
tree = node->children;
node = _gtk_rbtree_first (tree);
gtk_tree_path_append_index (path, 0);
}
else
{
gboolean done = FALSE;
do
{
node = _gtk_rbtree_next (tree, node);
if (node != NULL)
{
done = TRUE;
gtk_tree_path_next (path);
}
else
{
node = tree->parent_node;
tree = tree->parent_tree;
if (tree == NULL)
{
/* we've run out of tree */
/* We're done with this function */
goto out;
}
gtk_tree_path_up (path);
}
}
while (!done);
}
}
while (TRUE);
out:
if (path)
gtk_tree_path_free (path);
g_signal_handler_disconnect (model, inserted_id);
g_signal_handler_disconnect (model, deleted_id);
g_signal_handler_disconnect (model, reordered_id);
g_signal_handler_disconnect (priv->tree_view, changed_id);
g_object_unref (model);
/* check if we have to spew a scary message */
if (stop)
g_warning ("The model has been modified from within gtk_tree_selection_selected_foreach.\n"
"This function is for observing the selections of the tree only. If\n"
"you are trying to get all selected items from the tree, try using\n"
"gtk_tree_selection_get_selected_rows instead.\n");
}
/**
* gtk_tree_selection_select_path:
* @selection: A #GtkTreeSelection.
* @path: The #GtkTreePath to be selected.
*
* Select the row at @path.
**/
void
gtk_tree_selection_select_path (GtkTreeSelection *selection,
GtkTreePath *path)
{
GtkTreeSelectionPrivate *priv;
GtkRBNode *node;
GtkRBTree *tree;
gboolean ret;
GtkTreeSelectMode mode = 0;
g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
priv = selection->priv;
g_return_if_fail (priv->tree_view != NULL);
g_return_if_fail (path != NULL);
ret = _gtk_tree_view_find_node (priv->tree_view,
path,
&tree,
&node);
if (node == NULL || GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED) ||
ret == TRUE)
return;
if (priv->type == GTK_SELECTION_MULTIPLE)
mode = GTK_TREE_SELECT_MODE_TOGGLE;
_gtk_tree_selection_internal_select_node (selection,
node,
tree,
path,
mode,
FALSE);
}
/**
* gtk_tree_selection_unselect_path:
* @selection: A #GtkTreeSelection.
* @path: The #GtkTreePath to be unselected.
*
* Unselects the row at @path.
**/
void
gtk_tree_selection_unselect_path (GtkTreeSelection *selection,
GtkTreePath *path)
{
GtkTreeSelectionPrivate *priv;
GtkRBNode *node;
GtkRBTree *tree;
gboolean ret;
g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
priv = selection->priv;
g_return_if_fail (priv->tree_view != NULL);
g_return_if_fail (path != NULL);
ret = _gtk_tree_view_find_node (priv->tree_view,
path,
&tree,
&node);
if (node == NULL || !GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED) ||
ret == TRUE)
return;
_gtk_tree_selection_internal_select_node (selection,
node,
tree,
path,
GTK_TREE_SELECT_MODE_TOGGLE,
TRUE);
}
/**
* gtk_tree_selection_select_iter:
* @selection: A #GtkTreeSelection.
* @iter: The #GtkTreeIter to be selected.
*
* Selects the specified iterator.
**/
void
gtk_tree_selection_select_iter (GtkTreeSelection *selection,
GtkTreeIter *iter)
{
GtkTreeSelectionPrivate *priv;
GtkTreePath *path;
GtkTreeModel *model;
g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
priv = selection->priv;
g_return_if_fail (priv->tree_view != NULL);
model = gtk_tree_view_get_model (priv->tree_view);
g_return_if_fail (model != NULL);
g_return_if_fail (iter != NULL);
path = gtk_tree_model_get_path (model, iter);
if (path == NULL)
return;
gtk_tree_selection_select_path (selection, path);
gtk_tree_path_free (path);
}
/**
* gtk_tree_selection_unselect_iter:
* @selection: A #GtkTreeSelection.
* @iter: The #GtkTreeIter to be unselected.
*
* Unselects the specified iterator.
**/
void
gtk_tree_selection_unselect_iter (GtkTreeSelection *selection,
GtkTreeIter *iter)
{
GtkTreeSelectionPrivate *priv;
GtkTreePath *path;
GtkTreeModel *model;
g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
priv = selection->priv;
g_return_if_fail (priv->tree_view != NULL);
model = gtk_tree_view_get_model (priv->tree_view);
g_return_if_fail (model != NULL);
g_return_if_fail (iter != NULL);
path = gtk_tree_model_get_path (model, iter);
if (path == NULL)
return;
gtk_tree_selection_unselect_path (selection, path);
gtk_tree_path_free (path);
}
/**
* gtk_tree_selection_path_is_selected:
* @selection: A #GtkTreeSelection.
* @path: A #GtkTreePath to check selection on.
*
* Returns %TRUE if the row pointed to by @path is currently selected. If @path
* does not point to a valid location, %FALSE is returned
*
* Return value: %TRUE if @path is selected.
**/
gboolean
gtk_tree_selection_path_is_selected (GtkTreeSelection *selection,
GtkTreePath *path)
{
GtkTreeSelectionPrivate *priv;
GtkRBNode *node;
GtkRBTree *tree;
gboolean ret;
g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), FALSE);
priv = selection->priv;
g_return_val_if_fail (path != NULL, FALSE);
g_return_val_if_fail (priv->tree_view != NULL, FALSE);
if (gtk_tree_view_get_model (priv->tree_view) == NULL)
return FALSE;
ret = _gtk_tree_view_find_node (priv->tree_view,
path,
&tree,
&node);
if ((node == NULL) || !GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED) ||
ret == TRUE)
return FALSE;
return TRUE;
}
/**
* gtk_tree_selection_iter_is_selected:
* @selection: A #GtkTreeSelection
* @iter: A valid #GtkTreeIter
*
* Returns %TRUE if the row at @iter is currently selected.
*
* Return value: %TRUE, if @iter is selected
**/
gboolean
gtk_tree_selection_iter_is_selected (GtkTreeSelection *selection,
GtkTreeIter *iter)
{
GtkTreeSelectionPrivate *priv;
GtkTreePath *path;
GtkTreeModel *model;
gboolean retval;
g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), FALSE);
priv = selection->priv;
g_return_val_if_fail (iter != NULL, FALSE);
g_return_val_if_fail (priv->tree_view != NULL, FALSE);
model = gtk_tree_view_get_model (priv->tree_view);
g_return_val_if_fail (model != NULL, FALSE);
path = gtk_tree_model_get_path (model, iter);
if (path == NULL)
return FALSE;
retval = gtk_tree_selection_path_is_selected (selection, path);
gtk_tree_path_free (path);
return retval;
}
/* Wish I was in python, right now... */
struct _TempTuple {
GtkTreeSelection *selection;
gint dirty;
};
static void
select_all_helper (GtkRBTree *tree,
GtkRBNode *node,
gpointer data)
{
struct _TempTuple *tuple = data;
if (node->children)
_gtk_rbtree_traverse (node->children,
node->children->root,
G_PRE_ORDER,
select_all_helper,
data);
if (!GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
{
tuple->dirty = gtk_tree_selection_real_select_node (tuple->selection, tree, node, TRUE) || tuple->dirty;
}
}
/* We have a real_{un,}select_all function that doesn't emit the signal, so we
* can use it in other places without fear of the signal being emitted.
*/
static gint
gtk_tree_selection_real_select_all (GtkTreeSelection *selection)
{
GtkTreeSelectionPrivate *priv = selection->priv;
struct _TempTuple *tuple;
GtkRBTree *tree;
tree = _gtk_tree_view_get_rbtree (priv->tree_view);
if (tree == NULL)
return FALSE;
/* Mark all nodes selected */
tuple = g_new (struct _TempTuple, 1);
tuple->selection = selection;
tuple->dirty = FALSE;
_gtk_rbtree_traverse (tree, tree->root,
G_PRE_ORDER,
select_all_helper,
tuple);
if (tuple->dirty)
{
g_free (tuple);
return TRUE;
}
g_free (tuple);
return FALSE;
}
/**
* gtk_tree_selection_select_all:
* @selection: A #GtkTreeSelection.
*
* Selects all the nodes. @selection must be set to #GTK_SELECTION_MULTIPLE
* mode.
**/
void
gtk_tree_selection_select_all (GtkTreeSelection *selection)
{
GtkTreeSelectionPrivate *priv;
g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
priv = selection->priv;
g_return_if_fail (priv->tree_view != NULL);
if (_gtk_tree_view_get_rbtree (priv->tree_view) == NULL ||
gtk_tree_view_get_model (priv->tree_view) == NULL)
return;
g_return_if_fail (priv->type == GTK_SELECTION_MULTIPLE);
if (gtk_tree_selection_real_select_all (selection))
g_signal_emit (selection, tree_selection_signals[CHANGED], 0);
}
static void
unselect_all_helper (GtkRBTree *tree,
GtkRBNode *node,
gpointer data)
{
struct _TempTuple *tuple = data;
if (node->children)
_gtk_rbtree_traverse (node->children,
node->children->root,
G_PRE_ORDER,
unselect_all_helper,
data);
if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
{
tuple->dirty = gtk_tree_selection_real_select_node (tuple->selection, tree, node, FALSE) || tuple->dirty;
}
}
static gboolean
gtk_tree_selection_real_unselect_all (GtkTreeSelection *selection)
{
GtkTreeSelectionPrivate *priv = selection->priv;
struct _TempTuple *tuple;
if (priv->type == GTK_SELECTION_SINGLE ||
priv->type == GTK_SELECTION_BROWSE)
{
GtkRBTree *tree = NULL;
GtkRBNode *node = NULL;
GtkTreePath *anchor_path;
anchor_path = _gtk_tree_view_get_anchor_path (priv->tree_view);
if (anchor_path == NULL)
return FALSE;
_gtk_tree_view_find_node (priv->tree_view,
anchor_path,
&tree,
&node);
gtk_tree_path_free (anchor_path);
if (tree == NULL)
return FALSE;
if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
{
if (gtk_tree_selection_real_select_node (selection, tree, node, FALSE))
{
_gtk_tree_view_set_anchor_path (priv->tree_view, NULL);
return TRUE;
}
}
return FALSE;
}
else
{
GtkRBTree *tree;
tuple = g_new (struct _TempTuple, 1);
tuple->selection = selection;
tuple->dirty = FALSE;
tree = _gtk_tree_view_get_rbtree (priv->tree_view);
_gtk_rbtree_traverse (tree, tree->root,
G_PRE_ORDER,
unselect_all_helper,
tuple);
if (tuple->dirty)
{
g_free (tuple);
return TRUE;
}
g_free (tuple);
return FALSE;
}
}
/**
* gtk_tree_selection_unselect_all:
* @selection: A #GtkTreeSelection.
*
* Unselects all the nodes.
**/
void
gtk_tree_selection_unselect_all (GtkTreeSelection *selection)
{
GtkTreeSelectionPrivate *priv;
g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
priv = selection->priv;
g_return_if_fail (priv->tree_view != NULL);
if (_gtk_tree_view_get_rbtree (priv->tree_view) == NULL ||
gtk_tree_view_get_model (priv->tree_view) == NULL)
return;
if (gtk_tree_selection_real_unselect_all (selection))
g_signal_emit (selection, tree_selection_signals[CHANGED], 0);
}
enum
{
RANGE_SELECT,
RANGE_UNSELECT
};
static gint
gtk_tree_selection_real_modify_range (GtkTreeSelection *selection,
gint mode,
GtkTreePath *start_path,
GtkTreePath *end_path)
{
GtkTreeSelectionPrivate *priv = selection->priv;
GtkRBNode *start_node, *end_node;
GtkRBTree *start_tree, *end_tree;
GtkTreePath *anchor_path = NULL;
gboolean dirty = FALSE;
switch (gtk_tree_path_compare (start_path, end_path))
{
case 1:
_gtk_tree_view_find_node (priv->tree_view,
end_path,
&start_tree,
&start_node);
_gtk_tree_view_find_node (priv->tree_view,
start_path,
&end_tree,
&end_node);
anchor_path = start_path;
break;
case 0:
_gtk_tree_view_find_node (priv->tree_view,
start_path,
&start_tree,
&start_node);
end_tree = start_tree;
end_node = start_node;
anchor_path = start_path;
break;
case -1:
_gtk_tree_view_find_node (priv->tree_view,
start_path,
&start_tree,
&start_node);
_gtk_tree_view_find_node (priv->tree_view,
end_path,
&end_tree,
&end_node);
anchor_path = start_path;
break;
}
g_return_val_if_fail (start_node != NULL, FALSE);
g_return_val_if_fail (end_node != NULL, FALSE);
if (anchor_path)
_gtk_tree_view_set_anchor_path (priv->tree_view, anchor_path);
do
{
dirty |= gtk_tree_selection_real_select_node (selection, start_tree, start_node, (mode == RANGE_SELECT)?TRUE:FALSE);
if (start_node == end_node)
break;
if (start_node->children)
{
start_tree = start_node->children;
start_node = _gtk_rbtree_first (start_tree);
}
else
{
_gtk_rbtree_next_full (start_tree, start_node, &start_tree, &start_node);
if (start_tree == NULL)
{
/* we just ran out of tree. That means someone passed in bogus values.
*/
return dirty;
}
}
}
while (TRUE);
return dirty;
}
/**
* gtk_tree_selection_select_range:
* @selection: A #GtkTreeSelection.
* @start_path: The initial node of the range.
* @end_path: The final node of the range.
*
* Selects a range of nodes, determined by @start_path and @end_path inclusive.
* @selection must be set to #GTK_SELECTION_MULTIPLE mode.
**/
void
gtk_tree_selection_select_range (GtkTreeSelection *selection,
GtkTreePath *start_path,
GtkTreePath *end_path)
{
GtkTreeSelectionPrivate *priv;
g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
priv = selection->priv;
g_return_if_fail (priv->tree_view != NULL);
g_return_if_fail (priv->type == GTK_SELECTION_MULTIPLE);
g_return_if_fail (gtk_tree_view_get_model (priv->tree_view) != NULL);
if (gtk_tree_selection_real_modify_range (selection, RANGE_SELECT, start_path, end_path))
g_signal_emit (selection, tree_selection_signals[CHANGED], 0);
}
/**
* gtk_tree_selection_unselect_range:
* @selection: A #GtkTreeSelection.
* @start_path: The initial node of the range.
* @end_path: The initial node of the range.
*
* Unselects a range of nodes, determined by @start_path and @end_path
* inclusive.
*
* Since: 2.2
**/
void
gtk_tree_selection_unselect_range (GtkTreeSelection *selection,
GtkTreePath *start_path,
GtkTreePath *end_path)
{
GtkTreeSelectionPrivate *priv;
g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
priv = selection->priv;
g_return_if_fail (priv->tree_view != NULL);
g_return_if_fail (gtk_tree_view_get_model (priv->tree_view) != NULL);
if (gtk_tree_selection_real_modify_range (selection, RANGE_UNSELECT, start_path, end_path))
g_signal_emit (selection, tree_selection_signals[CHANGED], 0);
}
gboolean
_gtk_tree_selection_row_is_selectable (GtkTreeSelection *selection,
GtkRBNode *node,
GtkTreePath *path)
{
GtkTreeSelectionPrivate *priv = selection->priv;
GtkTreeIter iter;
GtkTreeModel *model;
GtkTreeViewRowSeparatorFunc separator_func;
gpointer separator_data;
gboolean sensitive = FALSE;
model = gtk_tree_view_get_model (priv->tree_view);
_gtk_tree_view_get_row_separator_func (priv->tree_view,
&separator_func, &separator_data);
if (!gtk_tree_model_get_iter (model, &iter, path))
sensitive = TRUE;
if (!sensitive && separator_func)
{
/* never allow separators to be selected */
if ((* separator_func) (model, &iter, separator_data))
return FALSE;
}
if (priv->user_func)
return (*priv->user_func) (selection, model, path,
GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED),
priv->user_data);
else
return TRUE;
}
/* Called internally by gtktreeview.c It handles actually selecting the tree.
*/
/*
* docs about the 'override_browse_mode', we set this flag when we want to
* unset select the node and override the select browse mode behaviour (that is
* 'one node should *always* be selected').
*/
void
_gtk_tree_selection_internal_select_node (GtkTreeSelection *selection,
GtkRBNode *node,
GtkRBTree *tree,
GtkTreePath *path,
GtkTreeSelectMode mode,
gboolean override_browse_mode)
{
GtkTreeSelectionPrivate *priv = selection->priv;
gint flags;
gint dirty = FALSE;
GtkTreePath *anchor_path = NULL;
if (priv->type == GTK_SELECTION_NONE)
return;
anchor_path = _gtk_tree_view_get_anchor_path (priv->tree_view);
if (priv->type == GTK_SELECTION_SINGLE ||
priv->type == GTK_SELECTION_BROWSE)
{
/* just unselect */
if (priv->type == GTK_SELECTION_BROWSE && override_browse_mode)
{
dirty = gtk_tree_selection_real_unselect_all (selection);
}
/* Did we try to select the same node again? */
else if (priv->type == GTK_SELECTION_SINGLE &&
anchor_path && gtk_tree_path_compare (path, anchor_path) == 0)
{
if ((mode & GTK_TREE_SELECT_MODE_TOGGLE) == GTK_TREE_SELECT_MODE_TOGGLE)
{
dirty = gtk_tree_selection_real_unselect_all (selection);
}
}
else
{
if (anchor_path)
{
/* We only want to select the new node if we can unselect the old one,
* and we can select the new one. */
dirty = _gtk_tree_selection_row_is_selectable (selection, node, path);
/* if dirty is FALSE, we weren't able to select the new one, otherwise, we try to
* unselect the new one
*/
if (dirty)
dirty = gtk_tree_selection_real_unselect_all (selection);
/* if dirty is TRUE at this point, we successfully unselected the
* old one, and can then select the new one */
if (dirty)
{
_gtk_tree_view_set_anchor_path (priv->tree_view, NULL);
if (gtk_tree_selection_real_select_node (selection, tree, node, TRUE))
_gtk_tree_view_set_anchor_path (priv->tree_view, path);
}
}
else
{
if (gtk_tree_selection_real_select_node (selection, tree, node, TRUE))
{
dirty = TRUE;
_gtk_tree_view_set_anchor_path (priv->tree_view, path);
}
}
}
}
else if (priv->type == GTK_SELECTION_MULTIPLE)
{
if ((mode & GTK_TREE_SELECT_MODE_EXTEND) == GTK_TREE_SELECT_MODE_EXTEND
&& (anchor_path == NULL))
{
_gtk_tree_view_set_anchor_path (priv->tree_view, path);
dirty = gtk_tree_selection_real_select_node (selection, tree, node, TRUE);
}
else if ((mode & (GTK_TREE_SELECT_MODE_EXTEND | GTK_TREE_SELECT_MODE_TOGGLE)) == (GTK_TREE_SELECT_MODE_EXTEND | GTK_TREE_SELECT_MODE_TOGGLE))
{
gtk_tree_selection_select_range (selection,
anchor_path,
path);
}
else if ((mode & GTK_TREE_SELECT_MODE_TOGGLE) == GTK_TREE_SELECT_MODE_TOGGLE)
{
flags = node->flags;
_gtk_tree_view_set_anchor_path (priv->tree_view, path);
if ((flags & GTK_RBNODE_IS_SELECTED) == GTK_RBNODE_IS_SELECTED)
dirty |= gtk_tree_selection_real_select_node (selection, tree, node, FALSE);
else
dirty |= gtk_tree_selection_real_select_node (selection, tree, node, TRUE);
}
else if ((mode & GTK_TREE_SELECT_MODE_EXTEND) == GTK_TREE_SELECT_MODE_EXTEND)
{
dirty = gtk_tree_selection_real_unselect_all (selection);
dirty |= gtk_tree_selection_real_modify_range (selection,
RANGE_SELECT,
anchor_path,
path);
}
else
{
dirty = gtk_tree_selection_real_unselect_all (selection);
_gtk_tree_view_set_anchor_path (priv->tree_view, path);
dirty |= gtk_tree_selection_real_select_node (selection, tree, node, TRUE);
}
}
if (anchor_path)
gtk_tree_path_free (anchor_path);
if (dirty)
g_signal_emit (selection, tree_selection_signals[CHANGED], 0);
}
void
_gtk_tree_selection_emit_changed (GtkTreeSelection *selection)
{
g_signal_emit (selection, tree_selection_signals[CHANGED], 0);
}
/* NOTE: Any {un,}selection ever done _MUST_ be done through this function!
*/
static gint
gtk_tree_selection_real_select_node (GtkTreeSelection *selection,
GtkRBTree *tree,
GtkRBNode *node,
gboolean select)
{
GtkTreeSelectionPrivate *priv = selection->priv;
gboolean toggle = FALSE;
GtkTreePath *path = NULL;
select = !! select;
if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED) != select)
{
path = _gtk_tree_path_new_from_rbtree (tree, node);
toggle = _gtk_tree_selection_row_is_selectable (selection, node, path);
gtk_tree_path_free (path);
}
if (toggle)
{
if (!GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
{
GTK_RBNODE_SET_FLAG (node, GTK_RBNODE_IS_SELECTED);
_gtk_tree_view_accessible_add_state (priv->tree_view, tree, node, GTK_CELL_RENDERER_SELECTED);
}
else
{
GTK_RBNODE_UNSET_FLAG (node, GTK_RBNODE_IS_SELECTED);
_gtk_tree_view_accessible_remove_state (priv->tree_view, tree, node, GTK_CELL_RENDERER_SELECTED);
}
_gtk_tree_view_queue_draw_node (priv->tree_view, tree, node, NULL);
return TRUE;
}
return FALSE;
}
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