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gtk2/gtk/gtktreemenu.c
Timm Bäder 56a58655fe Remove unnecessary gtk_widget_show calls
2017-01-22 14:38:21 +01:00

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/* gtktreemenu.c
*
* Copyright (C) 2010 Openismus GmbH
*
* Authors:
* Tristan Van Berkom <tristanvb@openismus.com>
*
* Based on some GtkComboBox menu code by Kristian Rietveld <kris@gtk.org>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
/*
* SECTION:gtktreemenu
* @Short_Description: A GtkMenu automatically created from a #GtkTreeModel
* @Title: GtkTreeMenu
*
* The #GtkTreeMenu is used to display a drop-down menu allowing selection
* of every row in the model and is used by the #GtkComboBox for its drop-down
* menu.
*/
#include "config.h"
#include "gtkintl.h"
#include "gtktreemenu.h"
#include "gtkmarshalers.h"
#include "gtkmenuitem.h"
#include "gtkseparatormenuitem.h"
#include "gtkcellareabox.h"
#include "gtkcellareacontext.h"
#include "gtkcelllayout.h"
#include "gtkcellview.h"
#include "gtkmenushellprivate.h"
#include "gtkprivate.h"
#undef GDK_DEPRECATED
#undef GDK_DEPRECATED_FOR
#define GDK_DEPRECATED
#define GDK_DEPRECATED_FOR(f)
/* GObjectClass */
static void gtk_tree_menu_constructed (GObject *object);
static void gtk_tree_menu_dispose (GObject *object);
static void gtk_tree_menu_finalize (GObject *object);
static void gtk_tree_menu_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_tree_menu_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
/* GtkWidgetClass */
static void gtk_tree_menu_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline);
/* GtkCellLayoutIface */
static void gtk_tree_menu_cell_layout_init (GtkCellLayoutIface *iface);
static GtkCellArea *gtk_tree_menu_cell_layout_get_area (GtkCellLayout *layout);
/* TreeModel/DrawingArea callbacks and building menus/submenus */
static inline void rebuild_menu (GtkTreeMenu *menu);
static gboolean menu_occupied (GtkTreeMenu *menu,
guint left_attach,
guint right_attach,
guint top_attach,
guint bottom_attach);
static void relayout_item (GtkTreeMenu *menu,
GtkWidget *item,
GtkTreeIter *iter,
GtkWidget *prev);
static void gtk_tree_menu_populate (GtkTreeMenu *menu);
static GtkWidget *gtk_tree_menu_create_item (GtkTreeMenu *menu,
GtkTreeIter *iter,
gboolean header_item);
static void gtk_tree_menu_create_submenu (GtkTreeMenu *menu,
GtkWidget *item,
GtkTreePath *path);
static void gtk_tree_menu_set_area (GtkTreeMenu *menu,
GtkCellArea *area);
static GtkWidget *gtk_tree_menu_get_path_item (GtkTreeMenu *menu,
GtkTreePath *path);
static gboolean gtk_tree_menu_path_in_menu (GtkTreeMenu *menu,
GtkTreePath *path,
gboolean *header_item);
static void row_inserted_cb (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeIter *iter,
GtkTreeMenu *menu);
static void row_deleted_cb (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeMenu *menu);
static void row_reordered_cb (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeIter *iter,
gint *new_order,
GtkTreeMenu *menu);
static void row_changed_cb (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeIter *iter,
GtkTreeMenu *menu);
static void context_size_changed_cb (GtkCellAreaContext *context,
GParamSpec *pspec,
GtkWidget *menu);
static void area_apply_attributes_cb (GtkCellArea *area,
GtkTreeModel *tree_model,
GtkTreeIter *iter,
gboolean is_expander,
gboolean is_expanded,
GtkTreeMenu *menu);
static void item_activated_cb (GtkMenuItem *item,
GtkTreeMenu *menu);
static void submenu_activated_cb (GtkTreeMenu *submenu,
const gchar *path,
GtkTreeMenu *menu);
static void gtk_tree_menu_set_model_internal (GtkTreeMenu *menu,
GtkTreeModel *model);
struct _GtkTreeMenuPrivate
{
/* TreeModel and parent for this menu */
GtkTreeModel *model;
GtkTreeRowReference *root;
/* CellArea and context for this menu */
GtkCellArea *area;
GtkCellAreaContext *context;
/* Signals */
gulong size_changed_id;
gulong apply_attributes_id;
gulong row_inserted_id;
gulong row_deleted_id;
gulong row_reordered_id;
gulong row_changed_id;
/* Grid menu mode */
gint wrap_width;
gint row_span_col;
gint col_span_col;
/* Flags */
guint32 menu_with_header : 1;
/* Row separators */
GtkTreeViewRowSeparatorFunc row_separator_func;
gpointer row_separator_data;
GDestroyNotify row_separator_destroy;
};
enum {
PROP_0,
PROP_MODEL,
PROP_ROOT,
PROP_CELL_AREA,
PROP_WRAP_WIDTH,
PROP_ROW_SPAN_COL,
PROP_COL_SPAN_COL
};
enum {
SIGNAL_MENU_ACTIVATE,
N_SIGNALS
};
static guint tree_menu_signals[N_SIGNALS] = { 0 };
static GQuark tree_menu_path_quark = 0;
G_DEFINE_TYPE_WITH_CODE (GtkTreeMenu, _gtk_tree_menu, GTK_TYPE_MENU,
G_ADD_PRIVATE (GtkTreeMenu)
G_IMPLEMENT_INTERFACE (GTK_TYPE_CELL_LAYOUT,
gtk_tree_menu_cell_layout_init));
static void
_gtk_tree_menu_init (GtkTreeMenu *menu)
{
menu->priv = _gtk_tree_menu_get_instance_private (menu);
menu->priv->row_span_col = -1;
menu->priv->col_span_col = -1;
gtk_menu_set_reserve_toggle_size (GTK_MENU (menu), FALSE);
}
static void
_gtk_tree_menu_class_init (GtkTreeMenuClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
tree_menu_path_quark = g_quark_from_static_string ("gtk-tree-menu-path");
object_class->constructed = gtk_tree_menu_constructed;
object_class->dispose = gtk_tree_menu_dispose;
object_class->finalize = gtk_tree_menu_finalize;
object_class->set_property = gtk_tree_menu_set_property;
object_class->get_property = gtk_tree_menu_get_property;
widget_class->measure = gtk_tree_menu_measure;
/*
* GtkTreeMenu::menu-activate:
* @menu: a #GtkTreeMenu
* @path: the #GtkTreePath string for the item which was activated
* @user_data: the user data
*
* This signal is emitted to notify that a menu item in the #GtkTreeMenu
* was activated and provides the path string from the #GtkTreeModel
* to specify which row was selected.
*
* Since: 3.0
*/
tree_menu_signals[SIGNAL_MENU_ACTIVATE] =
g_signal_new (I_("menu-activate"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
0, /* No class closure here */
NULL, NULL,
NULL,
G_TYPE_NONE, 1, G_TYPE_STRING);
/*
* GtkTreeMenu:model:
*
* The #GtkTreeModel from which the menu is constructed.
*
* Since: 3.0
*/
g_object_class_install_property (object_class,
PROP_MODEL,
g_param_spec_object ("model",
P_("TreeMenu model"),
P_("The model for the tree menu"),
GTK_TYPE_TREE_MODEL,
GTK_PARAM_READWRITE));
/*
* GtkTreeMenu:root:
*
* The #GtkTreePath that is the root for this menu, or %NULL.
*
* The #GtkTreeMenu recursively creates submenus for #GtkTreeModel
* rows that have children and the "root" for each menu is provided
* by the parent menu.
*
* If you dont provide a root for the #GtkTreeMenu then the whole
* model will be added to the menu. Specifying a root allows you
* to build a menu for a given #GtkTreePath and its children.
*
* Since: 3.0
*/
g_object_class_install_property (object_class,
PROP_ROOT,
g_param_spec_boxed ("root",
P_("TreeMenu root row"),
P_("The TreeMenu will display children of the "
"specified root"),
GTK_TYPE_TREE_PATH,
GTK_PARAM_READWRITE));
/*
* GtkTreeMenu:cell-area:
*
* The #GtkCellArea used to render cells in the menu items.
*
* You can provide a different cell area at object construction
* time, otherwise the #GtkTreeMenu will use a #GtkCellAreaBox.
*
* Since: 3.0
*/
g_object_class_install_property (object_class,
PROP_CELL_AREA,
g_param_spec_object ("cell-area",
P_("Cell Area"),
P_("The GtkCellArea used to layout cells"),
GTK_TYPE_CELL_AREA,
GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
/*
* GtkTreeMenu:wrap-width:
*
* If wrap-width is set to a positive value, the list will be
* displayed in multiple columns, the number of columns is
* determined by wrap-width.
*
* Since: 3.0
*/
g_object_class_install_property (object_class,
PROP_WRAP_WIDTH,
g_param_spec_int ("wrap-width",
P_("Wrap Width"),
P_("Wrap width for laying out items in a grid"),
0,
G_MAXINT,
0,
GTK_PARAM_READWRITE));
/*
* GtkTreeMenu:row-span-column:
*
* If this is set to a non-negative value, it must be the index of a column
* of type %G_TYPE_INT in the model.
*
* The values of that column are used to determine how many rows a value in
* the list will span. Therefore, the values in the model column pointed to
* by this property must be greater than zero and not larger than wrap-width.
*
* Since: 3.0
*/
g_object_class_install_property (object_class,
PROP_ROW_SPAN_COL,
g_param_spec_int ("row-span-column",
P_("Row span column"),
P_("TreeModel column containing the row span values"),
-1,
G_MAXINT,
-1,
GTK_PARAM_READWRITE));
/*
* GtkTreeMenu:column-span-column:
*
* If this is set to a non-negative value, it must be the index of a column
* of type %G_TYPE_INT in the model.
*
* The values of that column are used to determine how many columns a value
* in the list will span.
*
* Since: 3.0
*/
g_object_class_install_property (object_class,
PROP_COL_SPAN_COL,
g_param_spec_int ("column-span-column",
P_("Column span column"),
P_("TreeModel column containing the column span values"),
-1,
G_MAXINT,
-1,
GTK_PARAM_READWRITE));
}
/****************************************************************
* GObjectClass *
****************************************************************/
static void
gtk_tree_menu_constructed (GObject *object)
{
GtkTreeMenu *menu = GTK_TREE_MENU (object);
GtkTreeMenuPrivate *priv = menu->priv;
G_OBJECT_CLASS (_gtk_tree_menu_parent_class)->constructed (object);
if (!priv->area)
{
GtkCellArea *area = gtk_cell_area_box_new ();
gtk_tree_menu_set_area (menu, area);
}
priv->context = gtk_cell_area_create_context (priv->area);
priv->size_changed_id =
g_signal_connect (priv->context, "notify",
G_CALLBACK (context_size_changed_cb), menu);
}
static void
gtk_tree_menu_dispose (GObject *object)
{
GtkTreeMenu *menu;
GtkTreeMenuPrivate *priv;
menu = GTK_TREE_MENU (object);
priv = menu->priv;
_gtk_tree_menu_set_model (menu, NULL);
gtk_tree_menu_set_area (menu, NULL);
if (priv->context)
{
/* Disconnect signals */
g_signal_handler_disconnect (priv->context, priv->size_changed_id);
g_object_unref (priv->context);
priv->context = NULL;
priv->size_changed_id = 0;
}
G_OBJECT_CLASS (_gtk_tree_menu_parent_class)->dispose (object);
}
static void
gtk_tree_menu_finalize (GObject *object)
{
GtkTreeMenu *menu;
GtkTreeMenuPrivate *priv;
menu = GTK_TREE_MENU (object);
priv = menu->priv;
_gtk_tree_menu_set_row_separator_func (menu, NULL, NULL, NULL);
if (priv->root)
gtk_tree_row_reference_free (priv->root);
G_OBJECT_CLASS (_gtk_tree_menu_parent_class)->finalize (object);
}
static void
gtk_tree_menu_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkTreeMenu *menu = GTK_TREE_MENU (object);
switch (prop_id)
{
case PROP_MODEL:
_gtk_tree_menu_set_model (menu, g_value_get_object (value));
break;
case PROP_ROOT:
_gtk_tree_menu_set_root (menu, g_value_get_boxed (value));
break;
case PROP_CELL_AREA:
/* Construct-only, can only be assigned once */
gtk_tree_menu_set_area (menu, (GtkCellArea *)g_value_get_object (value));
break;
case PROP_WRAP_WIDTH:
_gtk_tree_menu_set_wrap_width (menu, g_value_get_int (value));
break;
case PROP_ROW_SPAN_COL:
_gtk_tree_menu_set_row_span_column (menu, g_value_get_int (value));
break;
case PROP_COL_SPAN_COL:
_gtk_tree_menu_set_column_span_column (menu, g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_tree_menu_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkTreeMenu *menu = GTK_TREE_MENU (object);
GtkTreeMenuPrivate *priv = menu->priv;
switch (prop_id)
{
case PROP_MODEL:
g_value_set_object (value, priv->model);
break;
case PROP_ROOT:
g_value_set_boxed (value, priv->root);
break;
case PROP_CELL_AREA:
g_value_set_object (value, priv->area);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/****************************************************************
* GtkWidgetClass *
****************************************************************/
/* We tell all the menu items to reserve space for the submenu
* indicator if there is at least one submenu, this way we ensure
* that every internal cell area gets allocated the
* same width (and requested height for the same appropriate width).
*/
static void
sync_reserve_submenu_size (GtkTreeMenu *menu)
{
GList *children, *l;
gboolean has_submenu = FALSE;
children = gtk_container_get_children (GTK_CONTAINER (menu));
for (l = children; l; l = l->next)
{
GtkMenuItem *item = l->data;
if (gtk_menu_item_get_submenu (item) != NULL)
{
has_submenu = TRUE;
break;
}
}
for (l = children; l; l = l->next)
{
GtkMenuItem *item = l->data;
gtk_menu_item_set_reserve_indicator (item, has_submenu);
}
g_list_free (children);
}
static void
gtk_tree_menu_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkTreeMenu *menu = GTK_TREE_MENU (widget);
GtkTreeMenuPrivate *priv = menu->priv;
/* We leave the requesting work up to the cellviews which operate in the same
* context, reserving space for the submenu indicator if any of the items have
* submenus ensures that every cellview will receive the same allocated width.
*
* Since GtkMenu does hieght-for-width correctly, we know that the width of
* every cell will be requested before the height-for-widths are requested.
*/
g_signal_handler_block (priv->context, priv->size_changed_id);
sync_reserve_submenu_size (menu);
GTK_WIDGET_CLASS (_gtk_tree_menu_parent_class)->measure (widget,
orientation,
for_size,
minimum, natural,
minimum_baseline, natural_baseline);
g_signal_handler_unblock (priv->context, priv->size_changed_id);
}
/****************************************************************
* GtkCellLayoutIface *
****************************************************************/
static void
gtk_tree_menu_cell_layout_init (GtkCellLayoutIface *iface)
{
iface->get_area = gtk_tree_menu_cell_layout_get_area;
}
static GtkCellArea *
gtk_tree_menu_cell_layout_get_area (GtkCellLayout *layout)
{
GtkTreeMenu *menu = GTK_TREE_MENU (layout);
GtkTreeMenuPrivate *priv = menu->priv;
return priv->area;
}
/****************************************************************
* TreeModel callbacks/populating menus *
****************************************************************/
static GtkWidget *
gtk_tree_menu_get_path_item (GtkTreeMenu *menu,
GtkTreePath *search)
{
GtkWidget *item = NULL;
GList *children, *l;
children = gtk_container_get_children (GTK_CONTAINER (menu));
for (l = children; item == NULL && l != NULL; l = l->next)
{
GtkWidget *child = l->data;
GtkTreePath *path = NULL;
if (GTK_IS_SEPARATOR_MENU_ITEM (child))
{
GtkTreeRowReference *row =
g_object_get_qdata (G_OBJECT (child), tree_menu_path_quark);
if (row)
{
path = gtk_tree_row_reference_get_path (row);
if (!path)
/* Return any first child where its row-reference became invalid,
* this is because row-references get null paths before we recieve
* the "row-deleted" signal.
*/
item = child;
}
}
else
{
GtkWidget *view = gtk_bin_get_child (GTK_BIN (child));
/* It's always a cellview */
if (GTK_IS_CELL_VIEW (view))
path = gtk_cell_view_get_displayed_row (GTK_CELL_VIEW (view));
if (!path)
/* Return any first child where its row-reference became invalid,
* this is because row-references get null paths before we recieve
* the "row-deleted" signal.
*/
item = child;
}
if (path)
{
if (gtk_tree_path_compare (search, path) == 0)
item = child;
gtk_tree_path_free (path);
}
}
g_list_free (children);
return item;
}
static gboolean
gtk_tree_menu_path_in_menu (GtkTreeMenu *menu,
GtkTreePath *path,
gboolean *header_item)
{
GtkTreeMenuPrivate *priv = menu->priv;
gboolean in_menu = FALSE;
gboolean is_header = FALSE;
/* Check if the is in root of the model */
if (gtk_tree_path_get_depth (path) == 1 && !priv->root)
in_menu = TRUE;
/* If we are a submenu, compare the parent path */
else if (priv->root)
{
GtkTreePath *root_path = gtk_tree_row_reference_get_path (priv->root);
GtkTreePath *search_path = gtk_tree_path_copy (path);
if (root_path)
{
if (priv->menu_with_header &&
gtk_tree_path_compare (root_path, search_path) == 0)
{
in_menu = TRUE;
is_header = TRUE;
}
else if (gtk_tree_path_get_depth (search_path) > 1)
{
gtk_tree_path_up (search_path);
if (gtk_tree_path_compare (root_path, search_path) == 0)
in_menu = TRUE;
}
}
gtk_tree_path_free (root_path);
gtk_tree_path_free (search_path);
}
if (header_item)
*header_item = is_header;
return in_menu;
}
static GtkWidget *
gtk_tree_menu_path_needs_submenu (GtkTreeMenu *menu,
GtkTreePath *search)
{
GtkWidget *item = NULL;
GList *children, *l;
GtkTreePath *parent_path;
if (gtk_tree_path_get_depth (search) <= 1)
return NULL;
parent_path = gtk_tree_path_copy (search);
gtk_tree_path_up (parent_path);
children = gtk_container_get_children (GTK_CONTAINER (menu));
for (l = children; item == NULL && l != NULL; l = l->next)
{
GtkWidget *child = l->data;
GtkTreePath *path = NULL;
/* Separators dont get submenus, if it already has a submenu then let
* the submenu handle inserted rows */
if (!GTK_IS_SEPARATOR_MENU_ITEM (child) &&
!gtk_menu_item_get_submenu (GTK_MENU_ITEM (child)))
{
GtkWidget *view = gtk_bin_get_child (GTK_BIN (child));
/* It's always a cellview */
if (GTK_IS_CELL_VIEW (view))
path = gtk_cell_view_get_displayed_row (GTK_CELL_VIEW (view));
}
if (path)
{
if (gtk_tree_path_compare (parent_path, path) == 0)
item = child;
gtk_tree_path_free (path);
}
}
g_list_free (children);
gtk_tree_path_free (parent_path);
return item;
}
static GtkWidget *
find_empty_submenu (GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv = menu->priv;
GList *children, *l;
GtkWidget *submenu = NULL;
children = gtk_container_get_children (GTK_CONTAINER (menu));
for (l = children; submenu == NULL && l != NULL; l = l->next)
{
GtkWidget *child = l->data;
GtkTreePath *path = NULL;
GtkTreeIter iter;
/* Separators dont get submenus, if it already has a submenu then let
* the submenu handle inserted rows */
if (!GTK_IS_SEPARATOR_MENU_ITEM (child))
{
GtkWidget *view = gtk_bin_get_child (GTK_BIN (child));
/* It's always a cellview */
if (GTK_IS_CELL_VIEW (view))
path = gtk_cell_view_get_displayed_row (GTK_CELL_VIEW (view));
}
if (path)
{
if (gtk_tree_model_get_iter (priv->model, &iter, path) &&
!gtk_tree_model_iter_has_child (priv->model, &iter))
submenu = gtk_menu_item_get_submenu (GTK_MENU_ITEM (child));
gtk_tree_path_free (path);
}
}
g_list_free (children);
return submenu;
}
static void
row_inserted_cb (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeIter *iter,
GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv = menu->priv;
gint *indices, index, depth;
GtkWidget *item;
/* If the iter should be in this menu then go ahead and insert it */
if (gtk_tree_menu_path_in_menu (menu, path, NULL))
{
if (priv->wrap_width > 0)
rebuild_menu (menu);
else
{
/* Get the index of the path for this depth */
indices = gtk_tree_path_get_indices (path);
depth = gtk_tree_path_get_depth (path);
index = indices[depth -1];
/* Menus with a header include a menuitem for its root node
* and a separator menu item */
if (priv->menu_with_header)
index += 2;
item = gtk_tree_menu_create_item (menu, iter, FALSE);
gtk_menu_shell_insert (GTK_MENU_SHELL (menu), item, index);
/* Resize everything */
gtk_cell_area_context_reset (menu->priv->context);
}
}
else
{
/* Create submenus for iters if we need to */
item = gtk_tree_menu_path_needs_submenu (menu, path);
if (item)
{
GtkTreePath *item_path = gtk_tree_path_copy (path);
gtk_tree_path_up (item_path);
gtk_tree_menu_create_submenu (menu, item, item_path);
gtk_tree_path_free (item_path);
}
}
}
static void
row_deleted_cb (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv = menu->priv;
GtkWidget *item;
/* If it's the header item we leave it to the parent menu
* to remove us from its menu
*/
item = gtk_tree_menu_get_path_item (menu, path);
if (item)
{
if (priv->wrap_width > 0)
rebuild_menu (menu);
else
{
/* Get rid of the deleted item */
gtk_widget_destroy (item);
/* Resize everything */
gtk_cell_area_context_reset (menu->priv->context);
}
}
else
{
/* It's up to the parent menu to destroy a child menu that becomes empty
* since the topmost menu belongs to the user and is allowed to have no contents */
GtkWidget *submenu = find_empty_submenu (menu);
if (submenu)
gtk_widget_destroy (submenu);
}
}
static void
row_reordered_cb (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeIter *iter,
gint *new_order,
GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv = menu->priv;
gboolean this_menu = FALSE;
if (gtk_tree_path_get_depth (path) == 0 && !priv->root)
this_menu = TRUE;
else if (priv->root)
{
GtkTreePath *root_path =
gtk_tree_row_reference_get_path (priv->root);
if (gtk_tree_path_compare (root_path, path) == 0)
this_menu = TRUE;
gtk_tree_path_free (root_path);
}
if (this_menu)
rebuild_menu (menu);
}
static gint
menu_item_position (GtkTreeMenu *menu,
GtkWidget *item)
{
GList *children, *l;
gint position;
children = gtk_container_get_children (GTK_CONTAINER (menu));
for (position = 0, l = children; l; position++, l = l->next)
{
GtkWidget *iitem = l->data;
if (item == iitem)
break;
}
g_list_free (children);
return position;
}
static void
row_changed_cb (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeIter *iter,
GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv = menu->priv;
gboolean is_separator = FALSE;
GtkWidget *item;
item = gtk_tree_menu_get_path_item (menu, path);
if (priv->root)
{
GtkTreePath *root_path =
gtk_tree_row_reference_get_path (priv->root);
if (root_path && gtk_tree_path_compare (root_path, path) == 0)
{
if (item)
{
/* Destroy the header item and then the following separator */
gtk_widget_destroy (item);
gtk_widget_destroy (GTK_MENU_SHELL (menu)->priv->children->data);
priv->menu_with_header = FALSE;
}
gtk_tree_path_free (root_path);
}
}
if (item)
{
if (priv->wrap_width > 0)
/* Ugly, we need to rebuild the menu here if
* the row-span/row-column values change
*/
rebuild_menu (menu);
else
{
if (priv->row_separator_func)
is_separator =
priv->row_separator_func (model, iter,
priv->row_separator_data);
if (is_separator != GTK_IS_SEPARATOR_MENU_ITEM (item))
{
gint position = menu_item_position (menu, item);
gtk_widget_destroy (item);
item = gtk_tree_menu_create_item (menu, iter, FALSE);
gtk_menu_shell_insert (GTK_MENU_SHELL (menu), item, position);
}
}
}
}
static void
context_size_changed_cb (GtkCellAreaContext *context,
GParamSpec *pspec,
GtkWidget *menu)
{
if (!strcmp (pspec->name, "minimum-width") ||
!strcmp (pspec->name, "natural-width") ||
!strcmp (pspec->name, "minimum-height") ||
!strcmp (pspec->name, "natural-height"))
gtk_widget_queue_resize (menu);
}
static gboolean
area_is_sensitive (GtkCellArea *area)
{
GList *cells, *list;
gboolean sensitive = FALSE;
cells = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (area));
for (list = cells; list; list = list->next)
{
g_object_get (list->data, "sensitive", &sensitive, NULL);
if (sensitive)
break;
}
g_list_free (cells);
return sensitive;
}
static void
area_apply_attributes_cb (GtkCellArea *area,
GtkTreeModel *tree_model,
GtkTreeIter *iter,
gboolean is_expander,
gboolean is_expanded,
GtkTreeMenu *menu)
{
/* If the menu for this iter has a submenu */
GtkTreeMenuPrivate *priv = menu->priv;
GtkTreePath *path;
GtkWidget *item;
gboolean is_header;
gboolean sensitive;
path = gtk_tree_model_get_path (tree_model, iter);
if (gtk_tree_menu_path_in_menu (menu, path, &is_header))
{
item = gtk_tree_menu_get_path_item (menu, path);
/* If there is no submenu, go ahead and update item sensitivity,
* items with submenus are always sensitive */
if (item && !gtk_menu_item_get_submenu (GTK_MENU_ITEM (item)))
{
sensitive = area_is_sensitive (priv->area);
gtk_widget_set_sensitive (item, sensitive);
if (is_header)
{
/* For header items we need to set the sensitivity
* of the following separator item
*/
if (GTK_MENU_SHELL (menu)->priv->children &&
GTK_MENU_SHELL (menu)->priv->children->next)
{
GtkWidget *separator =
GTK_MENU_SHELL (menu)->priv->children->next->data;
gtk_widget_set_sensitive (separator, sensitive);
}
}
}
}
gtk_tree_path_free (path);
}
static void
gtk_tree_menu_set_area (GtkTreeMenu *menu,
GtkCellArea *area)
{
GtkTreeMenuPrivate *priv = menu->priv;
if (priv->area)
{
g_signal_handler_disconnect (priv->area,
priv->apply_attributes_id);
priv->apply_attributes_id = 0;
g_object_unref (priv->area);
}
priv->area = area;
if (priv->area)
{
g_object_ref_sink (priv->area);
priv->apply_attributes_id =
g_signal_connect (priv->area, "apply-attributes",
G_CALLBACK (area_apply_attributes_cb), menu);
}
}
static gboolean
menu_occupied (GtkTreeMenu *menu,
guint left_attach,
guint right_attach,
guint top_attach,
guint bottom_attach)
{
GList *i;
for (i = GTK_MENU_SHELL (menu)->priv->children; i; i = i->next)
{
guint l, r, b, t;
gtk_container_child_get (GTK_CONTAINER (menu),
i->data,
"left-attach", &l,
"right-attach", &r,
"bottom-attach", &b,
"top-attach", &t,
NULL);
/* look if this item intersects with the given coordinates */
if (right_attach > l && left_attach < r && bottom_attach > t && top_attach < b)
return TRUE;
}
return FALSE;
}
static void
relayout_item (GtkTreeMenu *menu,
GtkWidget *item,
GtkTreeIter *iter,
GtkWidget *prev)
{
GtkTreeMenuPrivate *priv = menu->priv;
gint current_col = 0, current_row = 0;
gint rows = 1, cols = 1;
if (priv->col_span_col == -1 &&
priv->row_span_col == -1 &&
prev)
{
gtk_container_child_get (GTK_CONTAINER (menu), prev,
"right-attach", &current_col,
"top-attach", &current_row,
NULL);
if (current_col + cols > priv->wrap_width)
{
current_col = 0;
current_row++;
}
}
else
{
if (priv->col_span_col != -1)
gtk_tree_model_get (priv->model, iter,
priv->col_span_col, &cols,
-1);
if (priv->row_span_col != -1)
gtk_tree_model_get (priv->model, iter,
priv->row_span_col, &rows,
-1);
while (1)
{
if (current_col + cols > priv->wrap_width)
{
current_col = 0;
current_row++;
}
if (!menu_occupied (menu,
current_col, current_col + cols,
current_row, current_row + rows))
break;
current_col++;
}
}
/* set attach props */
gtk_menu_attach (GTK_MENU (menu), item,
current_col, current_col + cols,
current_row, current_row + rows);
}
static void
gtk_tree_menu_create_submenu (GtkTreeMenu *menu,
GtkWidget *item,
GtkTreePath *path)
{
GtkTreeMenuPrivate *priv = menu->priv;
GtkWidget *view;
GtkWidget *submenu;
view = gtk_bin_get_child (GTK_BIN (item));
gtk_cell_view_set_draw_sensitive (GTK_CELL_VIEW (view), TRUE);
submenu = _gtk_tree_menu_new_with_area (priv->area);
_gtk_tree_menu_set_row_separator_func (GTK_TREE_MENU (submenu),
priv->row_separator_func,
priv->row_separator_data,
priv->row_separator_destroy);
_gtk_tree_menu_set_wrap_width (GTK_TREE_MENU (submenu), priv->wrap_width);
_gtk_tree_menu_set_row_span_column (GTK_TREE_MENU (submenu), priv->row_span_col);
_gtk_tree_menu_set_column_span_column (GTK_TREE_MENU (submenu), priv->col_span_col);
gtk_tree_menu_set_model_internal (GTK_TREE_MENU (submenu), priv->model);
_gtk_tree_menu_set_root (GTK_TREE_MENU (submenu), path);
gtk_menu_item_set_submenu (GTK_MENU_ITEM (item), submenu);
g_signal_connect (submenu, "menu-activate",
G_CALLBACK (submenu_activated_cb), menu);
}
static GtkWidget *
gtk_tree_menu_create_item (GtkTreeMenu *menu,
GtkTreeIter *iter,
gboolean header_item)
{
GtkTreeMenuPrivate *priv = menu->priv;
GtkWidget *item, *view;
GtkTreePath *path;
gboolean is_separator = FALSE;
path = gtk_tree_model_get_path (priv->model, iter);
if (priv->row_separator_func)
is_separator =
priv->row_separator_func (priv->model, iter,
priv->row_separator_data);
if (is_separator)
{
item = gtk_separator_menu_item_new ();
g_object_set_qdata_full (G_OBJECT (item),
tree_menu_path_quark,
gtk_tree_row_reference_new (priv->model, path),
(GDestroyNotify)gtk_tree_row_reference_free);
}
else
{
view = gtk_cell_view_new_with_context (priv->area, priv->context);
item = gtk_menu_item_new ();
gtk_cell_view_set_model (GTK_CELL_VIEW (view), priv->model);
gtk_cell_view_set_displayed_row (GTK_CELL_VIEW (view), path);
gtk_container_add (GTK_CONTAINER (item), view);
g_signal_connect (item, "activate", G_CALLBACK (item_activated_cb), menu);
/* Add a GtkTreeMenu submenu to render the children of this row */
if (header_item == FALSE &&
gtk_tree_model_iter_has_child (priv->model, iter))
gtk_tree_menu_create_submenu (menu, item, path);
}
gtk_tree_path_free (path);
return item;
}
static inline void
rebuild_menu (GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv = menu->priv;
/* Destroy all the menu items */
gtk_container_foreach (GTK_CONTAINER (menu),
(GtkCallback) gtk_widget_destroy, NULL);
/* Populate */
if (priv->model)
gtk_tree_menu_populate (menu);
}
static void
gtk_tree_menu_populate (GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv = menu->priv;
GtkTreePath *path = NULL;
GtkTreeIter parent;
GtkTreeIter iter;
gboolean valid = FALSE;
GtkWidget *menu_item, *prev = NULL;
if (!priv->model)
return;
if (priv->root)
path = gtk_tree_row_reference_get_path (priv->root);
if (path)
{
if (gtk_tree_model_get_iter (priv->model, &parent, path))
valid = gtk_tree_model_iter_children (priv->model, &iter, &parent);
gtk_tree_path_free (path);
}
else
{
valid = gtk_tree_model_iter_children (priv->model, &iter, NULL);
}
/* Create a menu item for every row at the current depth, add a GtkTreeMenu
* submenu for iters/items that have children */
while (valid)
{
menu_item = gtk_tree_menu_create_item (menu, &iter, FALSE);
gtk_menu_shell_append (GTK_MENU_SHELL (menu), menu_item);
if (priv->wrap_width > 0)
relayout_item (menu, menu_item, &iter, prev);
prev = menu_item;
valid = gtk_tree_model_iter_next (priv->model, &iter);
}
}
static void
item_activated_cb (GtkMenuItem *item,
GtkTreeMenu *menu)
{
GtkCellView *view;
GtkTreePath *path;
gchar *path_str;
/* Only activate leafs, not parents */
if (!gtk_menu_item_get_submenu (item))
{
view = GTK_CELL_VIEW (gtk_bin_get_child (GTK_BIN (item)));
path = gtk_cell_view_get_displayed_row (view);
path_str = gtk_tree_path_to_string (path);
g_signal_emit (menu, tree_menu_signals[SIGNAL_MENU_ACTIVATE], 0, path_str);
g_free (path_str);
gtk_tree_path_free (path);
}
}
static void
submenu_activated_cb (GtkTreeMenu *submenu,
const gchar *path,
GtkTreeMenu *menu)
{
g_signal_emit (menu, tree_menu_signals[SIGNAL_MENU_ACTIVATE], 0, path);
}
/* Sets the model without rebuilding the menu, prevents
* infinite recursion while building submenus (we wait
* until the root is set and then build the menu) */
static void
gtk_tree_menu_set_model_internal (GtkTreeMenu *menu,
GtkTreeModel *model)
{
GtkTreeMenuPrivate *priv;
priv = menu->priv;
if (priv->model != model)
{
if (priv->model)
{
/* Disconnect signals */
g_signal_handler_disconnect (priv->model,
priv->row_inserted_id);
g_signal_handler_disconnect (priv->model,
priv->row_deleted_id);
g_signal_handler_disconnect (priv->model,
priv->row_reordered_id);
g_signal_handler_disconnect (priv->model,
priv->row_changed_id);
priv->row_inserted_id = 0;
priv->row_deleted_id = 0;
priv->row_reordered_id = 0;
priv->row_changed_id = 0;
g_object_unref (priv->model);
}
priv->model = model;
if (priv->model)
{
g_object_ref (priv->model);
/* Connect signals */
priv->row_inserted_id = g_signal_connect (priv->model, "row-inserted",
G_CALLBACK (row_inserted_cb), menu);
priv->row_deleted_id = g_signal_connect (priv->model, "row-deleted",
G_CALLBACK (row_deleted_cb), menu);
priv->row_reordered_id = g_signal_connect (priv->model, "rows-reordered",
G_CALLBACK (row_reordered_cb), menu);
priv->row_changed_id = g_signal_connect (priv->model, "row-changed",
G_CALLBACK (row_changed_cb), menu);
}
}
}
/****************************************************************
* API *
****************************************************************/
/**
* _gtk_tree_menu_new:
*
* Creates a new #GtkTreeMenu.
*
* Returns: A newly created #GtkTreeMenu with no model or root.
*
* Since: 3.0
*/
GtkWidget *
_gtk_tree_menu_new (void)
{
return (GtkWidget *)g_object_new (GTK_TYPE_TREE_MENU, NULL);
}
/*
* _gtk_tree_menu_new_with_area:
* @area: the #GtkCellArea to use to render cells in the menu
*
* Creates a new #GtkTreeMenu using @area to render its cells.
*
* Returns: A newly created #GtkTreeMenu with no model or root.
*
* Since: 3.0
*/
GtkWidget *
_gtk_tree_menu_new_with_area (GtkCellArea *area)
{
return (GtkWidget *)g_object_new (GTK_TYPE_TREE_MENU,
"cell-area", area,
NULL);
}
/*
* _gtk_tree_menu_new_full:
* @area: (allow-none): the #GtkCellArea to use to render cells in the menu, or %NULL.
* @model: (allow-none): the #GtkTreeModel to build the menu heirarchy from, or %NULL.
* @root: (allow-none): the #GtkTreePath indicating the root row for this menu, or %NULL.
*
* Creates a new #GtkTreeMenu hierarchy from the provided @model and @root using @area to render its cells.
*
* Returns: A newly created #GtkTreeMenu.
*
* Since: 3.0
*/
GtkWidget *
_gtk_tree_menu_new_full (GtkCellArea *area,
GtkTreeModel *model,
GtkTreePath *root)
{
return (GtkWidget *)g_object_new (GTK_TYPE_TREE_MENU,
"cell-area", area,
"model", model,
"root", root,
NULL);
}
/*
* _gtk_tree_menu_set_model:
* @menu: a #GtkTreeMenu
* @model: (allow-none): the #GtkTreeModel to build the menu hierarchy from, or %NULL.
*
* Sets @model to be used to build the menu heirarhcy.
*
* Since: 3.0
*/
void
_gtk_tree_menu_set_model (GtkTreeMenu *menu,
GtkTreeModel *model)
{
g_return_if_fail (GTK_IS_TREE_MENU (menu));
g_return_if_fail (model == NULL || GTK_IS_TREE_MODEL (model));
gtk_tree_menu_set_model_internal (menu, model);
rebuild_menu (menu);
}
/*
* _gtk_tree_menu_get_model:
* @menu: a #GtkTreeMenu
*
* Gets the @model currently used for the menu heirarhcy.
*
* Returns: (transfer none): the #GtkTreeModel which is used
* for @menu’s hierarchy.
*
* Since: 3.0
*/
GtkTreeModel *
_gtk_tree_menu_get_model (GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv;
g_return_val_if_fail (GTK_IS_TREE_MENU (menu), NULL);
priv = menu->priv;
return priv->model;
}
/*
* _gtk_tree_menu_set_root:
* @menu: a #GtkTreeMenu
* @path: (allow-none): the #GtkTreePath which is the root of @menu, or %NULL.
*
* Sets the root of a @menu’s hierarchy to be @path. @menu must already
* have a model set and @path must point to a valid path inside the model.
*
* Since: 3.0
*/
void
_gtk_tree_menu_set_root (GtkTreeMenu *menu,
GtkTreePath *path)
{
GtkTreeMenuPrivate *priv;
g_return_if_fail (GTK_IS_TREE_MENU (menu));
g_return_if_fail (menu->priv->model != NULL || path == NULL);
priv = menu->priv;
if (priv->root)
gtk_tree_row_reference_free (priv->root);
if (path)
priv->root = gtk_tree_row_reference_new (priv->model, path);
else
priv->root = NULL;
rebuild_menu (menu);
}
/*
* _gtk_tree_menu_get_root:
* @menu: a #GtkTreeMenu
*
* Gets the @root path for @menu’s hierarchy, or returns %NULL if @menu
* has no model or is building a heirarchy for the entire model. *
*
* Returns: (transfer full) (allow-none): A newly created #GtkTreePath
* pointing to the root of @menu which must be freed with gtk_tree_path_free().
*
* Since: 3.0
*/
GtkTreePath *
_gtk_tree_menu_get_root (GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv;
g_return_val_if_fail (GTK_IS_TREE_MENU (menu), NULL);
priv = menu->priv;
if (priv->root)
return gtk_tree_row_reference_get_path (priv->root);
return NULL;
}
/*
* _gtk_tree_menu_get_wrap_width:
* @menu: a #GtkTreeMenu
*
* Gets the wrap width which is used to determine the number of columns
* for @menu. If the wrap width is larger than 1, @menu is in table mode.
*
* Returns: the wrap width.
*
* Since: 3.0
*/
gint
_gtk_tree_menu_get_wrap_width (GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv;
g_return_val_if_fail (GTK_IS_TREE_MENU (menu), FALSE);
priv = menu->priv;
return priv->wrap_width;
}
/*
* _gtk_tree_menu_set_wrap_width:
* @menu: a #GtkTreeMenu
* @width: the wrap width
*
* Sets the wrap width which is used to determine the number of columns
* for @menu. If the wrap width is larger than 1, @menu is in table mode.
*
* Since: 3.0
*/
void
_gtk_tree_menu_set_wrap_width (GtkTreeMenu *menu,
gint width)
{
GtkTreeMenuPrivate *priv;
g_return_if_fail (GTK_IS_TREE_MENU (menu));
g_return_if_fail (width >= 0);
priv = menu->priv;
if (priv->wrap_width != width)
{
priv->wrap_width = width;
rebuild_menu (menu);
g_object_notify (G_OBJECT (menu), "wrap-width");
}
}
/*
* _gtk_tree_menu_get_row_span_column:
* @menu: a #GtkTreeMenu
*
* Gets the column with row span information for @menu.
* The row span column contains integers which indicate how many rows
* a menu item should span.
*
* Returns: the column in @menu’s model containing row span information, or -1.
*
* Since: 3.0
*/
gint
_gtk_tree_menu_get_row_span_column (GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv;
g_return_val_if_fail (GTK_IS_TREE_MENU (menu), FALSE);
priv = menu->priv;
return priv->row_span_col;
}
/*
* _gtk_tree_menu_set_row_span_column:
* @menu: a #GtkTreeMenu
* @row_span: the column in the model to fetch the row span for a given menu item.
*
* Sets the column with row span information for @menu to be @row_span.
* The row span column contains integers which indicate how many rows
* a menu item should span.
*
* Since: 3.0
*/
void
_gtk_tree_menu_set_row_span_column (GtkTreeMenu *menu,
gint row_span)
{
GtkTreeMenuPrivate *priv;
g_return_if_fail (GTK_IS_TREE_MENU (menu));
priv = menu->priv;
if (priv->row_span_col != row_span)
{
priv->row_span_col = row_span;
if (priv->wrap_width > 0)
rebuild_menu (menu);
g_object_notify (G_OBJECT (menu), "row-span-column");
}
}
/*
* _gtk_tree_menu_get_column_span_column:
* @menu: a #GtkTreeMenu
*
* Gets the column with column span information for @menu.
* The column span column contains integers which indicate how many columns
* a menu item should span.
*
* Returns: the column in @menu’s model containing column span information, or -1.
*
* Since: 3.0
*/
gint
_gtk_tree_menu_get_column_span_column (GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv;
g_return_val_if_fail (GTK_IS_TREE_MENU (menu), FALSE);
priv = menu->priv;
return priv->col_span_col;
}
/*
* _gtk_tree_menu_set_column_span_column:
* @menu: a #GtkTreeMenu
* @column_span: the column in the model to fetch the column span for a given menu item.
*
* Sets the column with column span information for @menu to be @column_span.
* The column span column contains integers which indicate how many columns
* a menu item should span.
*
* Since: 3.0
*/
void
_gtk_tree_menu_set_column_span_column (GtkTreeMenu *menu,
gint column_span)
{
GtkTreeMenuPrivate *priv;
g_return_if_fail (GTK_IS_TREE_MENU (menu));
priv = menu->priv;
if (priv->col_span_col != column_span)
{
priv->col_span_col = column_span;
if (priv->wrap_width > 0)
rebuild_menu (menu);
g_object_notify (G_OBJECT (menu), "column-span-column");
}
}
/*
* _gtk_tree_menu_get_row_separator_func:
* @menu: a #GtkTreeMenu
*
* Gets the current #GtkTreeViewRowSeparatorFunc separator function.
*
* Returns: the current row separator function.
*
* Since: 3.0
*/
GtkTreeViewRowSeparatorFunc
_gtk_tree_menu_get_row_separator_func (GtkTreeMenu *menu)
{
GtkTreeMenuPrivate *priv;
g_return_val_if_fail (GTK_IS_TREE_MENU (menu), NULL);
priv = menu->priv;
return priv->row_separator_func;
}
/*
* _gtk_tree_menu_set_row_separator_func:
* @menu: a #GtkTreeMenu
* @func: (allow-none): a #GtkTreeViewRowSeparatorFunc, or %NULL to unset the separator function.
* @data: (allow-none): user data to pass to @func, or %NULL
* @destroy: (allow-none): destroy notifier for @data, or %NULL
*
* Sets the row separator function, which is used to determine
* whether a row should be drawn as a separator. If the row separator
* function is %NULL, no separators are drawn. This is the default value.
*
* Since: 3.0
*/
void
_gtk_tree_menu_set_row_separator_func (GtkTreeMenu *menu,
GtkTreeViewRowSeparatorFunc func,
gpointer data,
GDestroyNotify destroy)
{
GtkTreeMenuPrivate *priv;
g_return_if_fail (GTK_IS_TREE_MENU (menu));
priv = menu->priv;
if (priv->row_separator_destroy)
priv->row_separator_destroy (priv->row_separator_data);
priv->row_separator_func = func;
priv->row_separator_data = data;
priv->row_separator_destroy = destroy;
rebuild_menu (menu);
}
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