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gtk2/gtk/gtkmenu.c
Lars Uebernickel d30d56452c GtkWidget: Add gtk_widget_insert_action_group() 
This allows adding a GActionGroup with a given name at an arbitrary
point in the widget tree.

This patch also adds an internal _get_action_muxer() API.  Calling this
will create a GActionMuxer associated with the widget.  The parent of
the muxer will be the muxer of the widget's conceptual parent.  For
non-menus, that is the normal parent.  For menus, it is the attach
widget.

In this way, we end up with a hierarchy of GActionMuxer that largely
reflects the hierarchy of GtkWidget, but only in places that the action
context has been requested.  These muxers are the ones on which the
inserted actions groups are installed.

A following patch will add a user of this API.
2012-08-20 13:09:04 -04:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
/**
* SECTION:gtkmenu
* @Short_description: A menu widget
* @Title: GtkMenu
*
* A #GtkMenu is a #GtkMenuShell that implements a drop down menu
* consisting of a list of #GtkMenuItem objects which can be navigated
* and activated by the user to perform application functions.
*
* A #GtkMenu is most commonly dropped down by activating a
* #GtkMenuItem in a #GtkMenuBar or popped up by activating a
* #GtkMenuItem in another #GtkMenu.
*
* A #GtkMenu can also be popped up by activating a #GtkComboBox.
* Other composite widgets such as the #GtkNotebook can pop up a
* #GtkMenu as well.
*
* Applications can display a #GtkMenu as a popup menu by calling the
* gtk_menu_popup() function. The example below shows how an application
* can pop up a menu when the 3rd mouse button is pressed.
*
* <example>
* <title>Connecting the popup signal handler.</title>
* <programlisting>
* /<!---->* connect our handler which will popup the menu *<!---->/
* g_signal_connect_swapped (window, "button_press_event",
* G_CALLBACK (my_popup_handler), menu);
* </programlisting>
* </example>
*
* <example>
* <title>Signal handler which displays a popup menu.</title>
* <programlisting>
* static gint
* my_popup_handler (GtkWidget *widget, GdkEvent *event)
* {
* GtkMenu *menu;
* GdkEventButton *event_button;
*
* g_return_val_if_fail (widget != NULL, FALSE);
* g_return_val_if_fail (GTK_IS_MENU (widget), FALSE);
* g_return_val_if_fail (event != NULL, FALSE);
*
* /<!---->* The "widget" is the menu that was supplied when
* * g_signal_connect_swapped() was called.
* *<!---->/
* menu = GTK_MENU (widget);
*
* if (event->type == GDK_BUTTON_PRESS)
* {
* event_button = (GdkEventButton *) event;
* if (event_button->button == GDK_BUTTON_SECONDARY)
* {
* gtk_menu_popup (menu, NULL, NULL, NULL, NULL,
* event_button->button, event_button->time);
* return TRUE;
* }
* }
*
* return FALSE;
* }
* </programlisting>
* </example>
*/
#include "config.h"
#include <string.h>
#include <gobject/gvaluecollector.h>
#include "gtkaccellabel.h"
#include "gtkaccelmap.h"
#include "gtkadjustment.h"
#include "gtkbindings.h"
#include "gtkcheckmenuitem.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkmenuprivate.h"
#include "gtkmenuitemprivate.h"
#include "gtkmenushellprivate.h"
#include "gtkwindow.h"
#include "gtkbox.h"
#include "gtkscrollbar.h"
#include "gtksettings.h"
#include "gtkprivate.h"
#include "gtkwidgetpath.h"
#include "gtkwidgetprivate.h"
#include "gtkdnd.h"
#include "gtkintl.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetprivate.h"
#include "deprecated/gtktearoffmenuitem.h"
#include "a11y/gtkmenuaccessible.h"
#define NAVIGATION_REGION_OVERSHOOT 50 /* How much the navigation region
* extends below the submenu
*/
#define MENU_SCROLL_STEP1 8
#define MENU_SCROLL_STEP2 15
#define MENU_SCROLL_FAST_ZONE 8
#define MENU_SCROLL_TIMEOUT1 50
#define MENU_SCROLL_TIMEOUT2 20
#define ATTACH_INFO_KEY "gtk-menu-child-attach-info-key"
#define ATTACHED_MENUS "gtk-attached-menus"
typedef struct _GtkMenuAttachData GtkMenuAttachData;
typedef struct _GtkMenuPopdownData GtkMenuPopdownData;
struct _GtkMenuAttachData
{
GtkWidget *attach_widget;
GtkMenuDetachFunc detacher;
};
struct _GtkMenuPopdownData
{
GtkMenu *menu;
GdkDevice *device;
};
typedef struct
{
gint left_attach;
gint right_attach;
gint top_attach;
gint bottom_attach;
gint effective_left_attach;
gint effective_right_attach;
gint effective_top_attach;
gint effective_bottom_attach;
} AttachInfo;
enum {
MOVE_SCROLL,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_ACTIVE,
PROP_ACCEL_GROUP,
PROP_ACCEL_PATH,
PROP_ATTACH_WIDGET,
PROP_TEAROFF_STATE,
PROP_TEAROFF_TITLE,
PROP_MONITOR,
PROP_RESERVE_TOGGLE_SIZE
};
enum {
CHILD_PROP_0,
CHILD_PROP_LEFT_ATTACH,
CHILD_PROP_RIGHT_ATTACH,
CHILD_PROP_TOP_ATTACH,
CHILD_PROP_BOTTOM_ATTACH
};
static void gtk_menu_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_menu_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_menu_set_child_property(GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_menu_get_child_property(GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gtk_menu_destroy (GtkWidget *widget);
static void gtk_menu_realize (GtkWidget *widget);
static void gtk_menu_unrealize (GtkWidget *widget);
static void gtk_menu_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_menu_show (GtkWidget *widget);
static gboolean gtk_menu_draw (GtkWidget *widget,
cairo_t *cr);
static gboolean gtk_menu_key_press (GtkWidget *widget,
GdkEventKey *event);
static gboolean gtk_menu_scroll (GtkWidget *widget,
GdkEventScroll *event);
static gboolean gtk_menu_button_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_menu_button_release (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_menu_motion_notify (GtkWidget *widget,
GdkEventMotion *event);
static gboolean gtk_menu_enter_notify (GtkWidget *widget,
GdkEventCrossing *event);
static gboolean gtk_menu_leave_notify (GtkWidget *widget,
GdkEventCrossing *event);
static void gtk_menu_scroll_to (GtkMenu *menu,
gint offset);
static void gtk_menu_grab_notify (GtkWidget *widget,
gboolean was_grabbed);
static gboolean gtk_menu_captured_event (GtkWidget *widget,
GdkEvent *event);
static void gtk_menu_stop_scrolling (GtkMenu *menu);
static void gtk_menu_remove_scroll_timeout (GtkMenu *menu);
static gboolean gtk_menu_scroll_timeout (gpointer data);
static void gtk_menu_scroll_item_visible (GtkMenuShell *menu_shell,
GtkWidget *menu_item);
static void gtk_menu_select_item (GtkMenuShell *menu_shell,
GtkWidget *menu_item);
static void gtk_menu_real_insert (GtkMenuShell *menu_shell,
GtkWidget *child,
gint position);
static void gtk_menu_scrollbar_changed (GtkAdjustment *adjustment,
GtkMenu *menu);
static void gtk_menu_handle_scrolling (GtkMenu *menu,
gint event_x,
gint event_y,
gboolean enter,
gboolean motion);
static void gtk_menu_set_tearoff_hints (GtkMenu *menu,
gint width);
static void gtk_menu_style_updated (GtkWidget *widget);
static gboolean gtk_menu_focus (GtkWidget *widget,
GtkDirectionType direction);
static gint gtk_menu_get_popup_delay (GtkMenuShell *menu_shell);
static void gtk_menu_move_current (GtkMenuShell *menu_shell,
GtkMenuDirectionType direction);
static void gtk_menu_real_move_scroll (GtkMenu *menu,
GtkScrollType type);
static void gtk_menu_stop_navigating_submenu (GtkMenu *menu);
static gboolean gtk_menu_stop_navigating_submenu_cb (gpointer user_data);
static gboolean gtk_menu_navigating_submenu (GtkMenu *menu,
gint event_x,
gint event_y);
static void gtk_menu_set_submenu_navigation_region (GtkMenu *menu,
GtkMenuItem *menu_item,
GdkEventCrossing *event);
static void gtk_menu_deactivate (GtkMenuShell *menu_shell);
static void gtk_menu_show_all (GtkWidget *widget);
static void gtk_menu_position (GtkMenu *menu,
gboolean set_scroll_offset);
static void gtk_menu_reparent (GtkMenu *menu,
GtkWidget *new_parent,
gboolean unrealize);
static void gtk_menu_remove (GtkContainer *menu,
GtkWidget *widget);
static void gtk_menu_update_title (GtkMenu *menu);
static void menu_grab_transfer_window_destroy (GtkMenu *menu);
static GdkWindow *menu_grab_transfer_window_get (GtkMenu *menu);
static gboolean gtk_menu_real_can_activate_accel (GtkWidget *widget,
guint signal_id);
static void _gtk_menu_refresh_accel_paths (GtkMenu *menu,
gboolean group_changed);
static void gtk_menu_get_preferred_width (GtkWidget *widget,
gint *minimum_size,
gint *natural_size);
static void gtk_menu_get_preferred_height (GtkWidget *widget,
gint *minimum_size,
gint *natural_size);
static void gtk_menu_get_preferred_height_for_width (GtkWidget *widget,
gint for_size,
gint *minimum_size,
gint *natural_size);
static const gchar attach_data_key[] = "gtk-menu-attach-data";
static guint menu_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GtkMenu, gtk_menu, GTK_TYPE_MENU_SHELL)
static void
menu_queue_resize (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
priv->have_layout = FALSE;
gtk_widget_queue_resize (GTK_WIDGET (menu));
}
static void
attach_info_free (AttachInfo *info)
{
g_slice_free (AttachInfo, info);
}
static AttachInfo *
get_attach_info (GtkWidget *child)
{
GObject *object = G_OBJECT (child);
AttachInfo *ai = g_object_get_data (object, ATTACH_INFO_KEY);
if (!ai)
{
ai = g_slice_new0 (AttachInfo);
g_object_set_data_full (object, I_(ATTACH_INFO_KEY), ai,
(GDestroyNotify) attach_info_free);
}
return ai;
}
static gboolean
is_grid_attached (AttachInfo *ai)
{
return (ai->left_attach >= 0 &&
ai->right_attach >= 0 &&
ai->top_attach >= 0 &&
ai->bottom_attach >= 0);
}
static void
menu_ensure_layout (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
if (!priv->have_layout)
{
GtkMenuShell *menu_shell = GTK_MENU_SHELL (menu);
GList *l;
gchar *row_occupied;
gint current_row;
gint max_right_attach;
gint max_bottom_attach;
/* Find extents of gridded portion
*/
max_right_attach = 1;
max_bottom_attach = 0;
for (l = menu_shell->priv->children; l; l = l->next)
{
GtkWidget *child = l->data;
AttachInfo *ai = get_attach_info (child);
if (is_grid_attached (ai))
{
max_bottom_attach = MAX (max_bottom_attach, ai->bottom_attach);
max_right_attach = MAX (max_right_attach, ai->right_attach);
}
}
/* Find empty rows */
row_occupied = g_malloc0 (max_bottom_attach);
for (l = menu_shell->priv->children; l; l = l->next)
{
GtkWidget *child = l->data;
AttachInfo *ai = get_attach_info (child);
if (is_grid_attached (ai))
{
gint i;
for (i = ai->top_attach; i < ai->bottom_attach; i++)
row_occupied[i] = TRUE;
}
}
/* Lay non-grid-items out in those rows
*/
current_row = 0;
for (l = menu_shell->priv->children; l; l = l->next)
{
GtkWidget *child = l->data;
AttachInfo *ai = get_attach_info (child);
if (!is_grid_attached (ai))
{
while (current_row < max_bottom_attach && row_occupied[current_row])
current_row++;
ai->effective_left_attach = 0;
ai->effective_right_attach = max_right_attach;
ai->effective_top_attach = current_row;
ai->effective_bottom_attach = current_row + 1;
current_row++;
}
else
{
ai->effective_left_attach = ai->left_attach;
ai->effective_right_attach = ai->right_attach;
ai->effective_top_attach = ai->top_attach;
ai->effective_bottom_attach = ai->bottom_attach;
}
}
g_free (row_occupied);
priv->n_rows = MAX (current_row, max_bottom_attach);
priv->n_columns = max_right_attach;
priv->have_layout = TRUE;
}
}
static gint
gtk_menu_get_n_columns (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
menu_ensure_layout (menu);
return priv->n_columns;
}
static gint
gtk_menu_get_n_rows (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
menu_ensure_layout (menu);
return priv->n_rows;
}
static void
get_effective_child_attach (GtkWidget *child,
int *l,
int *r,
int *t,
int *b)
{
GtkMenu *menu = GTK_MENU (gtk_widget_get_parent (child));
AttachInfo *ai;
menu_ensure_layout (menu);
ai = get_attach_info (child);
if (l)
*l = ai->effective_left_attach;
if (r)
*r = ai->effective_right_attach;
if (t)
*t = ai->effective_top_attach;
if (b)
*b = ai->effective_bottom_attach;
}
static void
gtk_menu_class_init (GtkMenuClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class);
GtkMenuShellClass *menu_shell_class = GTK_MENU_SHELL_CLASS (class);
GtkBindingSet *binding_set;
gobject_class->set_property = gtk_menu_set_property;
gobject_class->get_property = gtk_menu_get_property;
widget_class->destroy = gtk_menu_destroy;
widget_class->realize = gtk_menu_realize;
widget_class->unrealize = gtk_menu_unrealize;
widget_class->size_allocate = gtk_menu_size_allocate;
widget_class->show = gtk_menu_show;
widget_class->draw = gtk_menu_draw;
widget_class->scroll_event = gtk_menu_scroll;
widget_class->key_press_event = gtk_menu_key_press;
widget_class->button_press_event = gtk_menu_button_press;
widget_class->button_release_event = gtk_menu_button_release;
widget_class->motion_notify_event = gtk_menu_motion_notify;
widget_class->show_all = gtk_menu_show_all;
widget_class->enter_notify_event = gtk_menu_enter_notify;
widget_class->leave_notify_event = gtk_menu_leave_notify;
widget_class->style_updated = gtk_menu_style_updated;
widget_class->focus = gtk_menu_focus;
widget_class->can_activate_accel = gtk_menu_real_can_activate_accel;
widget_class->grab_notify = gtk_menu_grab_notify;
widget_class->get_preferred_width = gtk_menu_get_preferred_width;
widget_class->get_preferred_height = gtk_menu_get_preferred_height;
widget_class->get_preferred_height_for_width = gtk_menu_get_preferred_height_for_width;
container_class->remove = gtk_menu_remove;
container_class->get_child_property = gtk_menu_get_child_property;
container_class->set_child_property = gtk_menu_set_child_property;
menu_shell_class->submenu_placement = GTK_LEFT_RIGHT;
menu_shell_class->deactivate = gtk_menu_deactivate;
menu_shell_class->select_item = gtk_menu_select_item;
menu_shell_class->insert = gtk_menu_real_insert;
menu_shell_class->get_popup_delay = gtk_menu_get_popup_delay;
menu_shell_class->move_current = gtk_menu_move_current;
/**
* GtkMenu::move-scroll:
* @menu: a #GtkMenu
* @scroll_type: a #GtkScrollType
*/
menu_signals[MOVE_SCROLL] =
g_signal_new_class_handler (I_("move-scroll"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gtk_menu_real_move_scroll),
NULL, NULL,
_gtk_marshal_VOID__ENUM,
G_TYPE_NONE, 1,
GTK_TYPE_SCROLL_TYPE);
/**
* GtkMenu:active:
*
* The index of the currently selected menu item, or -1 if no
* menu item is selected.
*
* Since: 2.14
**/
g_object_class_install_property (gobject_class,
PROP_ACTIVE,
g_param_spec_int ("active",
P_("Active"),
P_("The currently selected menu item"),
-1, G_MAXINT, -1,
GTK_PARAM_READWRITE));
/**
* GtkMenu:accel-group:
*
* The accel group holding accelerators for the menu.
*
* Since: 2.14
**/
g_object_class_install_property (gobject_class,
PROP_ACCEL_GROUP,
g_param_spec_object ("accel-group",
P_("Accel Group"),
P_("The accel group holding accelerators for the menu"),
GTK_TYPE_ACCEL_GROUP,
GTK_PARAM_READWRITE));
/**
* GtkMenu:accel-path:
*
* An accel path used to conveniently construct accel paths of child items.
*
* Since: 2.14
**/
g_object_class_install_property (gobject_class,
PROP_ACCEL_PATH,
g_param_spec_string ("accel-path",
P_("Accel Path"),
P_("An accel path used to conveniently construct accel paths of child items"),
NULL,
GTK_PARAM_READWRITE));
/**
* GtkMenu:attach-widget:
*
* The widget the menu is attached to. Setting this property attaches
* the menu without a #GtkMenuDetachFunc. If you need to use a detacher,
* use gtk_menu_attach_to_widget() directly.
*
* Since: 2.14
**/
g_object_class_install_property (gobject_class,
PROP_ATTACH_WIDGET,
g_param_spec_object ("attach-widget",
P_("Attach Widget"),
P_("The widget the menu is attached to"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_TEAROFF_TITLE,
g_param_spec_string ("tearoff-title",
P_("Tearoff Title"),
P_("A title that may be displayed by the window manager when this menu is torn-off"),
NULL,
GTK_PARAM_READWRITE));
/**
* GtkMenu:tearoff-state:
*
* A boolean that indicates whether the menu is torn-off.
*
* Since: 2.6
**/
g_object_class_install_property (gobject_class,
PROP_TEAROFF_STATE,
g_param_spec_boolean ("tearoff-state",
P_("Tearoff State"),
P_("A boolean that indicates whether the menu is torn-off"),
FALSE,
GTK_PARAM_READWRITE));
/**
* GtkMenu:monitor:
*
* The monitor the menu will be popped up on.
*
* Since: 2.14
**/
g_object_class_install_property (gobject_class,
PROP_MONITOR,
g_param_spec_int ("monitor",
P_("Monitor"),
P_("The monitor the menu will be popped up on"),
-1, G_MAXINT, -1,
GTK_PARAM_READWRITE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("vertical-padding",
P_("Vertical Padding"),
P_("Extra space at the top and bottom of the menu"),
0,
G_MAXINT,
1,
GTK_PARAM_READABLE));
/**
* GtkMenu:reserve-toggle-size:
*
* A boolean that indicates whether the menu reserves space for
* toggles and icons, regardless of their actual presence.
*
* This property should only be changed from its default value
* for special-purposes such as tabular menus. Regular menus that
* are connected to a menu bar or context menus should reserve
* toggle space for consistency.
*
* Since: 2.18
*/
g_object_class_install_property (gobject_class,
PROP_RESERVE_TOGGLE_SIZE,
g_param_spec_boolean ("reserve-toggle-size",
P_("Reserve Toggle Size"),
P_("A boolean that indicates whether the menu reserves space for toggles and icons"),
TRUE,
GTK_PARAM_READWRITE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("horizontal-padding",
P_("Horizontal Padding"),
P_("Extra space at the left and right edges of the menu"),
0,
G_MAXINT,
0,
GTK_PARAM_READABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("vertical-offset",
P_("Vertical Offset"),
P_("When the menu is a submenu, position it this number of pixels offset vertically"),
G_MININT,
G_MAXINT,
0,
GTK_PARAM_READABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("horizontal-offset",
P_("Horizontal Offset"),
P_("When the menu is a submenu, position it this number of pixels offset horizontally"),
G_MININT,
G_MAXINT,
-2,
GTK_PARAM_READABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_boolean ("double-arrows",
P_("Double Arrows"),
P_("When scrolling, always show both arrows."),
TRUE,
GTK_PARAM_READABLE));
/**
* GtkMenu:arrow-placement:
*
* Indicates where scroll arrows should be placed.
*
* Since: 2.16
**/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_enum ("arrow-placement",
P_("Arrow Placement"),
P_("Indicates where scroll arrows should be placed"),
GTK_TYPE_ARROW_PLACEMENT,
GTK_ARROWS_BOTH,
GTK_PARAM_READABLE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_LEFT_ATTACH,
g_param_spec_int ("left-attach",
P_("Left Attach"),
P_("The column number to attach the left side of the child to"),
-1, INT_MAX, -1,
GTK_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_RIGHT_ATTACH,
g_param_spec_int ("right-attach",
P_("Right Attach"),
P_("The column number to attach the right side of the child to"),
-1, INT_MAX, -1,
GTK_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_TOP_ATTACH,
g_param_spec_int ("top-attach",
P_("Top Attach"),
P_("The row number to attach the top of the child to"),
-1, INT_MAX, -1,
GTK_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_BOTTOM_ATTACH,
g_param_spec_int ("bottom-attach",
P_("Bottom Attach"),
P_("The row number to attach the bottom of the child to"),
-1, INT_MAX, -1,
GTK_PARAM_READWRITE));
/**
* GtkMenu:arrow-scaling:
*
* Arbitrary constant to scale down the size of the scroll arrow.
*
* Since: 2.16
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_float ("arrow-scaling",
P_("Arrow Scaling"),
P_("Arbitrary constant to scale down the size of the scroll arrow"),
0.0, 1.0, 0.7,
GTK_PARAM_READABLE));
binding_set = gtk_binding_set_by_class (class);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Up, 0,
I_("move-current"), 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PREV);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Up, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PREV);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Down, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_NEXT);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Down, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_NEXT);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Left, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PARENT);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Left, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PARENT);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Right, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_CHILD);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Right, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_CHILD);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Home, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_START);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Home, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_START);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_End, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_END);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_End, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_END);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Page_Up, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_PAGE_UP);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Page_Up, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_PAGE_UP);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Page_Down, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_PAGE_DOWN);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Page_Down, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_PAGE_DOWN);
g_type_class_add_private (gobject_class, sizeof (GtkMenuPrivate));
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_MENU_ACCESSIBLE);
}
static void
gtk_menu_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkMenu *menu = GTK_MENU (object);
switch (prop_id)
{
case PROP_ACTIVE:
gtk_menu_set_active (menu, g_value_get_int (value));
break;
case PROP_ACCEL_GROUP:
gtk_menu_set_accel_group (menu, g_value_get_object (value));
break;
case PROP_ACCEL_PATH:
gtk_menu_set_accel_path (menu, g_value_get_string (value));
break;
case PROP_ATTACH_WIDGET:
{
GtkWidget *widget;
widget = gtk_menu_get_attach_widget (menu);
if (widget)
gtk_menu_detach (menu);
widget = (GtkWidget*) g_value_get_object (value);
if (widget)
gtk_menu_attach_to_widget (menu, widget, NULL);
}
break;
case PROP_TEAROFF_STATE:
gtk_menu_set_tearoff_state (menu, g_value_get_boolean (value));
break;
case PROP_TEAROFF_TITLE:
gtk_menu_set_title (menu, g_value_get_string (value));
break;
case PROP_MONITOR:
gtk_menu_set_monitor (menu, g_value_get_int (value));
break;
case PROP_RESERVE_TOGGLE_SIZE:
gtk_menu_set_reserve_toggle_size (menu, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_menu_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkMenu *menu = GTK_MENU (object);
switch (prop_id)
{
case PROP_ACTIVE:
g_value_set_int (value, g_list_index (GTK_MENU_SHELL (menu)->priv->children, gtk_menu_get_active (menu)));
break;
case PROP_ACCEL_GROUP:
g_value_set_object (value, gtk_menu_get_accel_group (menu));
break;
case PROP_ACCEL_PATH:
g_value_set_string (value, gtk_menu_get_accel_path (menu));
break;
case PROP_ATTACH_WIDGET:
g_value_set_object (value, gtk_menu_get_attach_widget (menu));
break;
case PROP_TEAROFF_STATE:
g_value_set_boolean (value, gtk_menu_get_tearoff_state (menu));
break;
case PROP_TEAROFF_TITLE:
g_value_set_string (value, gtk_menu_get_title (menu));
break;
case PROP_MONITOR:
g_value_set_int (value, gtk_menu_get_monitor (menu));
break;
case PROP_RESERVE_TOGGLE_SIZE:
g_value_set_boolean (value, gtk_menu_get_reserve_toggle_size (menu));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_menu_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkMenu *menu = GTK_MENU (container);
AttachInfo *ai = get_attach_info (child);
switch (property_id)
{
case CHILD_PROP_LEFT_ATTACH:
ai->left_attach = g_value_get_int (value);
break;
case CHILD_PROP_RIGHT_ATTACH:
ai->right_attach = g_value_get_int (value);
break;
case CHILD_PROP_TOP_ATTACH:
ai->top_attach = g_value_get_int (value);
break;
case CHILD_PROP_BOTTOM_ATTACH:
ai->bottom_attach = g_value_get_int (value);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
return;
}
menu_queue_resize (menu);
}
static void
gtk_menu_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
AttachInfo *ai = get_attach_info (child);
switch (property_id)
{
case CHILD_PROP_LEFT_ATTACH:
g_value_set_int (value, ai->left_attach);
break;
case CHILD_PROP_RIGHT_ATTACH:
g_value_set_int (value, ai->right_attach);
break;
case CHILD_PROP_TOP_ATTACH:
g_value_set_int (value, ai->top_attach);
break;
case CHILD_PROP_BOTTOM_ATTACH:
g_value_set_int (value, ai->bottom_attach);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
return;
}
}
static gboolean
gtk_menu_window_event (GtkWidget *window,
GdkEvent *event,
GtkWidget *menu)
{
gboolean handled = FALSE;
g_object_ref (window);
g_object_ref (menu);
switch (event->type)
{
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
handled = gtk_widget_event (menu, event);
break;
case GDK_WINDOW_STATE:
/* Window for the menu has been closed by the display server or by GDK.
* Update the internal state as if the user had clicked outside the
* menu
*/
if (event->window_state.new_window_state & GDK_WINDOW_STATE_WITHDRAWN &&
event->window_state.changed_mask & GDK_WINDOW_STATE_WITHDRAWN)
gtk_menu_shell_deactivate (GTK_MENU_SHELL(menu));
break;
default:
break;
}
g_object_unref (window);
g_object_unref (menu);
return handled;
}
static void
gtk_menu_init (GtkMenu *menu)
{
GtkMenuPrivate *priv;
GtkStyleContext *context;
priv = G_TYPE_INSTANCE_GET_PRIVATE (menu, GTK_TYPE_MENU, GtkMenuPrivate);
menu->priv = priv;
priv->toplevel = g_object_connect (g_object_new (GTK_TYPE_WINDOW,
"type", GTK_WINDOW_POPUP,
"child", menu,
NULL),
"signal::event", gtk_menu_window_event, menu,
"signal::destroy", gtk_widget_destroyed, &priv->toplevel,
NULL);
gtk_window_set_resizable (GTK_WINDOW (priv->toplevel), FALSE);
gtk_window_set_mnemonic_modifier (GTK_WINDOW (priv->toplevel), 0);
/* Refloat the menu, so that reference counting for the menu isn't
* affected by it being a child of the toplevel
*/
g_object_force_floating (G_OBJECT (menu));
priv->needs_destruction_ref = TRUE;
priv->monitor_num = -1;
priv->drag_start_y = -1;
context = gtk_widget_get_style_context (GTK_WIDGET (menu));
gtk_style_context_add_class (context, GTK_STYLE_CLASS_MENU);
_gtk_widget_set_captured_event_handler (GTK_WIDGET (menu), gtk_menu_captured_event);
}
static void
gtk_menu_destroy (GtkWidget *widget)
{
GtkMenu *menu = GTK_MENU (widget);
GtkMenuPrivate *priv = menu->priv;
GtkMenuAttachData *data;
gtk_menu_remove_scroll_timeout (menu);
data = g_object_get_data (G_OBJECT (widget), attach_data_key);
if (data)
gtk_menu_detach (menu);
gtk_menu_stop_navigating_submenu (menu);
if (priv->old_active_menu_item)
g_clear_object (&priv->old_active_menu_item);
/* Add back the reference count for being a child */
if (priv->needs_destruction_ref)
{
priv->needs_destruction_ref = FALSE;
g_object_ref (widget);
}
if (priv->accel_group)
g_clear_object (&priv->accel_group);
if (priv->toplevel)
gtk_widget_destroy (priv->toplevel);
if (priv->tearoff_window)
gtk_widget_destroy (priv->tearoff_window);
if (priv->heights)
{
g_free (priv->heights);
priv->heights = NULL;
}
if (priv->title)
{
g_free (priv->title);
priv->title = NULL;
}
if (priv->position_func_data_destroy)
{
priv->position_func_data_destroy (priv->position_func_data);
priv->position_func_data = NULL;
priv->position_func_data_destroy = NULL;
}
GTK_WIDGET_CLASS (gtk_menu_parent_class)->destroy (widget);
}
static void
menu_change_screen (GtkMenu *menu,
GdkScreen *new_screen)
{
GtkMenuPrivate *priv = menu->priv;
if (gtk_widget_has_screen (GTK_WIDGET (menu)))
{
if (new_screen == gtk_widget_get_screen (GTK_WIDGET (menu)))
return;
}
if (priv->torn_off)
{
gtk_window_set_screen (GTK_WINDOW (priv->tearoff_window), new_screen);
gtk_menu_position (menu, TRUE);
}
gtk_window_set_screen (GTK_WINDOW (priv->toplevel), new_screen);
priv->monitor_num = -1;
}
static void
attach_widget_screen_changed (GtkWidget *attach_widget,
GdkScreen *previous_screen,
GtkMenu *menu)
{
if (gtk_widget_has_screen (attach_widget) &&
!g_object_get_data (G_OBJECT (menu), "gtk-menu-explicit-screen"))
menu_change_screen (menu, gtk_widget_get_screen (attach_widget));
}
/**
* gtk_menu_attach_to_widget:
* @menu: a #GtkMenu
* @attach_widget: the #GtkWidget that the menu will be attached to
* @detacher: (scope async)(allow-none): the user supplied callback function
* that will be called when the menu calls gtk_menu_detach()
*
* Attaches the menu to the widget and provides a callback function
* that will be invoked when the menu calls gtk_menu_detach() during
* its destruction.
*/
void
gtk_menu_attach_to_widget (GtkMenu *menu,
GtkWidget *attach_widget,
GtkMenuDetachFunc detacher)
{
GtkMenuAttachData *data;
GList *list;
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (GTK_IS_WIDGET (attach_widget));
/* keep this function in sync with gtk_widget_set_parent() */
data = g_object_get_data (G_OBJECT (menu), attach_data_key);
if (data)
{
g_warning ("gtk_menu_attach_to_widget(): menu already attached to %s",
g_type_name (G_TYPE_FROM_INSTANCE (data->attach_widget)));
return;
}
g_object_ref_sink (menu);
data = g_slice_new (GtkMenuAttachData);
data->attach_widget = attach_widget;
g_signal_connect (attach_widget, "screen-changed",
G_CALLBACK (attach_widget_screen_changed), menu);
attach_widget_screen_changed (attach_widget, NULL, menu);
data->detacher = detacher;
g_object_set_data (G_OBJECT (menu), I_(attach_data_key), data);
list = g_object_steal_data (G_OBJECT (attach_widget), ATTACHED_MENUS);
if (!g_list_find (list, menu))
list = g_list_prepend (list, menu);
g_object_set_data_full (G_OBJECT (attach_widget), I_(ATTACHED_MENUS), list,
(GDestroyNotify) g_list_free);
if (gtk_widget_get_state_flags (GTK_WIDGET (menu)) != 0)
gtk_widget_set_state_flags (GTK_WIDGET (menu), 0, TRUE);
/* Attach the widget to the toplevel window. */
gtk_window_set_attached_to (GTK_WINDOW (menu->priv->toplevel), attach_widget);
_gtk_widget_update_parent_muxer (GTK_WIDGET (menu));
/* Fallback title for menu comes from attach widget */
gtk_menu_update_title (menu);
g_object_notify (G_OBJECT (menu), "attach-widget");
}
/**
* gtk_menu_get_attach_widget:
* @menu: a #GtkMenu
*
* Returns the #GtkWidget that the menu is attached to.
*
* Returns: (transfer none): the #GtkWidget that the menu is attached to
*/
GtkWidget*
gtk_menu_get_attach_widget (GtkMenu *menu)
{
GtkMenuAttachData *data;
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
data = g_object_get_data (G_OBJECT (menu), attach_data_key);
if (data)
return data->attach_widget;
return NULL;
}
/**
* gtk_menu_detach:
* @menu: a #GtkMenu
*
* Detaches the menu from the widget to which it had been attached.
* This function will call the callback function, @detacher, provided
* when the gtk_menu_attach_to_widget() function was called.
*/
void
gtk_menu_detach (GtkMenu *menu)
{
GtkMenuAttachData *data;
GList *list;
g_return_if_fail (GTK_IS_MENU (menu));
/* keep this function in sync with gtk_widget_unparent() */
data = g_object_get_data (G_OBJECT (menu), attach_data_key);
if (!data)
{
g_warning ("gtk_menu_detach(): menu is not attached");
return;
}
g_object_set_data (G_OBJECT (menu), I_(attach_data_key), NULL);
/* Detach the toplevel window. */
gtk_window_set_attached_to (GTK_WINDOW (menu->priv->toplevel), NULL);
g_signal_handlers_disconnect_by_func (data->attach_widget,
(gpointer) attach_widget_screen_changed,
menu);
if (data->detacher)
data->detacher (data->attach_widget, menu);
list = g_object_steal_data (G_OBJECT (data->attach_widget), ATTACHED_MENUS);
list = g_list_remove (list, menu);
if (list)
g_object_set_data_full (G_OBJECT (data->attach_widget), I_(ATTACHED_MENUS), list,
(GDestroyNotify) g_list_free);
else
g_object_set_data (G_OBJECT (data->attach_widget), I_(ATTACHED_MENUS), NULL);
if (gtk_widget_get_realized (GTK_WIDGET (menu)))
gtk_widget_unrealize (GTK_WIDGET (menu));
g_slice_free (GtkMenuAttachData, data);
_gtk_widget_update_parent_muxer (GTK_WIDGET (menu));
/* Fallback title for menu comes from attach widget */
gtk_menu_update_title (menu);
g_object_notify (G_OBJECT (menu), "attach-widget");
g_object_unref (menu);
}
static void
gtk_menu_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkMenu *menu = GTK_MENU (container);
GtkMenuPrivate *priv = menu->priv;
/* Clear out old_active_menu_item if it matches the item we are removing */
if (priv->old_active_menu_item == widget)
g_clear_object (&priv->old_active_menu_item);
GTK_CONTAINER_CLASS (gtk_menu_parent_class)->remove (container, widget);
g_object_set_data (G_OBJECT (widget), I_(ATTACH_INFO_KEY), NULL);
menu_queue_resize (menu);
}
/**
* gtk_menu_new:
*
* Creates a new #GtkMenu
*
* Returns: a new #GtkMenu
*/
GtkWidget*
gtk_menu_new (void)
{
return g_object_new (GTK_TYPE_MENU, NULL);
}
static void
gtk_menu_real_insert (GtkMenuShell *menu_shell,
GtkWidget *child,
gint position)
{
GtkMenu *menu = GTK_MENU (menu_shell);
GtkMenuPrivate *priv = menu->priv;
AttachInfo *ai = get_attach_info (child);
ai->left_attach = -1;
ai->right_attach = -1;
ai->top_attach = -1;
ai->bottom_attach = -1;
if (gtk_widget_get_realized (GTK_WIDGET (menu_shell)))
gtk_widget_set_parent_window (child, priv->bin_window);
GTK_MENU_SHELL_CLASS (gtk_menu_parent_class)->insert (menu_shell, child, position);
menu_queue_resize (menu);
}
static void
gtk_menu_tearoff_bg_copy (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
gint width, height;
if (priv->torn_off)
{
GdkWindow *window;
cairo_surface_t *surface;
cairo_pattern_t *pattern;
cairo_t *cr;
priv->tearoff_active = FALSE;
priv->saved_scroll_offset = priv->scroll_offset;
window = gtk_widget_get_window (priv->tearoff_window);
width = gdk_window_get_width (window);
height = gdk_window_get_height (window);
surface = gdk_window_create_similar_surface (window,
CAIRO_CONTENT_COLOR,
width,
height);
cr = cairo_create (surface);
gdk_cairo_set_source_window (cr, window, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
gtk_widget_set_size_request (priv->tearoff_window, width, height);
pattern = cairo_pattern_create_for_surface (surface);
gdk_window_set_background_pattern (window, pattern);
cairo_pattern_destroy (pattern);
cairo_surface_destroy (surface);
}
}
static gboolean
popup_grab_on_window (GdkWindow *window,
GdkDevice *keyboard,
GdkDevice *pointer,
guint32 activate_time)
{
if (keyboard &&
gdk_device_grab (keyboard, window,
GDK_OWNERSHIP_WINDOW, TRUE,
GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
NULL, activate_time) != GDK_GRAB_SUCCESS)
return FALSE;
if (pointer &&
gdk_device_grab (pointer, window,
GDK_OWNERSHIP_WINDOW, TRUE,
GDK_SMOOTH_SCROLL_MASK |
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK |
GDK_POINTER_MOTION_MASK,
NULL, activate_time) != GDK_GRAB_SUCCESS)
{
if (keyboard)
gdk_device_ungrab (keyboard, activate_time);
return FALSE;
}
return TRUE;
}
/**
* gtk_menu_popup_for_device:
* @menu: a #GtkMenu
* @device: (allow-none): a #GdkDevice
* @parent_menu_shell: (allow-none): the menu shell containing the triggering
* menu item, or %NULL
* @parent_menu_item: (allow-none): the menu item whose activation triggered
* the popup, or %NULL
* @func: (allow-none): a user supplied function used to position the menu,
* or %NULL
* @data: (allow-none): user supplied data to be passed to @func
* @destroy: (allow-none): destroy notify for @data
* @button: the mouse button which was pressed to initiate the event
* @activate_time: the time at which the activation event occurred
*
* Displays a menu and makes it available for selection.
*
* Applications can use this function to display context-sensitive menus,
* and will typically supply %NULL for the @parent_menu_shell,
* @parent_menu_item, @func, @data and @destroy parameters. The default
* menu positioning function will position the menu at the current position
* of @device (or its corresponding pointer).
*
* The @button parameter should be the mouse button pressed to initiate
* the menu popup. If the menu popup was initiated by something other than
* a mouse button press, such as a mouse button release or a keypress,
* @button should be 0.
*
* The @activate_time parameter is used to conflict-resolve initiation of
* concurrent requests for mouse/keyboard grab requests. To function
* properly, this needs to be the time stamp of the user event (such as
* a mouse click or key press) that caused the initiation of the popup.
* Only if no such event is available, gtk_get_current_event_time() can
* be used instead.
*
* Since: 3.0
*/
void
gtk_menu_popup_for_device (GtkMenu *menu,
GdkDevice *device,
GtkWidget *parent_menu_shell,
GtkWidget *parent_menu_item,
GtkMenuPositionFunc func,
gpointer data,
GDestroyNotify destroy,
guint button,
guint32 activate_time)
{
GtkMenuPrivate *priv = menu->priv;
GtkWidget *widget;
GtkWidget *xgrab_shell;
GtkWidget *parent;
GdkEvent *current_event;
GtkMenuShell *menu_shell;
gboolean grab_keyboard;
GtkWidget *parent_toplevel;
GdkDevice *keyboard, *pointer, *source_device = NULL;
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (device == NULL || GDK_IS_DEVICE (device));
if (device == NULL)
device = gtk_get_current_event_device ();
if (device == NULL)
{
GdkDisplay *display;
GdkDeviceManager *device_manager;
GList *devices;
display = gtk_widget_get_display (GTK_WIDGET (menu));
device_manager = gdk_display_get_device_manager (display);
devices = gdk_device_manager_list_devices (device_manager, GDK_DEVICE_TYPE_MASTER);
device = devices->data;
g_list_free (devices);
}
widget = GTK_WIDGET (menu);
menu_shell = GTK_MENU_SHELL (menu);
if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
{
keyboard = device;
pointer = gdk_device_get_associated_device (device);
}
else
{
pointer = device;
keyboard = gdk_device_get_associated_device (device);
}
menu_shell->priv->parent_menu_shell = parent_menu_shell;
priv->seen_item_enter = FALSE;
/* Find the last viewable ancestor, and make an X grab on it
*/
parent = GTK_WIDGET (menu);
xgrab_shell = NULL;
while (parent)
{
gboolean viewable = TRUE;
GtkWidget *tmp = parent;
while (tmp)
{
if (!gtk_widget_get_mapped (tmp))
{
viewable = FALSE;
break;
}
tmp = gtk_widget_get_parent (tmp);
}
if (viewable)
xgrab_shell = parent;
parent = GTK_MENU_SHELL (parent)->priv->parent_menu_shell;
}
/* We want to receive events generated when we map the menu;
* unfortunately, since there is probably already an implicit
* grab in place from the button that the user used to pop up
* the menu, we won't receive then -- in particular, the EnterNotify
* when the menu pops up under the pointer.
*
* If we are grabbing on a parent menu shell, no problem; just grab
* on that menu shell first before popping up the window with
* owner_events = TRUE.
*
* When grabbing on the menu itself, things get more convoluted --
* we do an explicit grab on a specially created window with
* owner_events = TRUE, which we override further down with a
* grab on the menu. (We can't grab on the menu until it is mapped;
* we probably could just leave the grab on the other window,
* with a little reorganization of the code in gtkmenu*).
*/
grab_keyboard = gtk_menu_shell_get_take_focus (menu_shell);
gtk_window_set_accept_focus (GTK_WINDOW (priv->toplevel), grab_keyboard);
if (!grab_keyboard)
keyboard = NULL;
if (xgrab_shell && xgrab_shell != widget)
{
if (popup_grab_on_window (gtk_widget_get_window (xgrab_shell), keyboard, pointer, activate_time))
{
_gtk_menu_shell_set_grab_device (GTK_MENU_SHELL (xgrab_shell), pointer);
GTK_MENU_SHELL (xgrab_shell)->priv->have_xgrab = TRUE;
}
}
else
{
GdkWindow *transfer_window;
xgrab_shell = widget;
transfer_window = menu_grab_transfer_window_get (menu);
if (popup_grab_on_window (transfer_window, keyboard, pointer, activate_time))
{
_gtk_menu_shell_set_grab_device (GTK_MENU_SHELL (xgrab_shell), pointer);
GTK_MENU_SHELL (xgrab_shell)->priv->have_xgrab = TRUE;
}
}
if (!GTK_MENU_SHELL (xgrab_shell)->priv->have_xgrab)
{
/* We failed to make our pointer/keyboard grab.
* Rather than leaving the user with a stuck up window,
* we just abort here. Presumably the user will try again.
*/
menu_shell->priv->parent_menu_shell = NULL;
menu_grab_transfer_window_destroy (menu);
return;
}
_gtk_menu_shell_set_grab_device (GTK_MENU_SHELL (menu), pointer);
menu_shell->priv->active = TRUE;
menu_shell->priv->button = button;
/* If we are popping up the menu from something other than, a button
* press then, as a heuristic, we ignore enter events for the menu
* until we get a MOTION_NOTIFY.
*/
current_event = gtk_get_current_event ();
if (current_event)
{
if ((current_event->type != GDK_BUTTON_PRESS) &&
(current_event->type != GDK_ENTER_NOTIFY))
menu_shell->priv->ignore_enter = TRUE;
source_device = gdk_event_get_source_device (current_event);
gdk_event_free (current_event);
}
else
menu_shell->priv->ignore_enter = TRUE;
if (priv->torn_off)
{
gtk_menu_tearoff_bg_copy (menu);
gtk_menu_reparent (menu, priv->toplevel, FALSE);
}
parent_toplevel = NULL;
if (parent_menu_shell)
parent_toplevel = gtk_widget_get_toplevel (parent_menu_shell);
else if (!g_object_get_data (G_OBJECT (menu), "gtk-menu-explicit-screen"))
{
GtkWidget *attach_widget = gtk_menu_get_attach_widget (menu);
if (attach_widget)
parent_toplevel = gtk_widget_get_toplevel (attach_widget);
}
/* Set transient for to get the right window group and parent */
if (GTK_IS_WINDOW (parent_toplevel))
gtk_window_set_transient_for (GTK_WINDOW (priv->toplevel),
GTK_WINDOW (parent_toplevel));
priv->parent_menu_item = parent_menu_item;
priv->position_func = func;
priv->position_func_data = data;
priv->position_func_data_destroy = destroy;
menu_shell->priv->activate_time = activate_time;
/* We need to show the menu here rather in the init function
* because code expects to be able to tell if the menu is onscreen
* by looking at gtk_widget_get_visible (menu)
*/
gtk_widget_show (GTK_WIDGET (menu));
/* Position the menu, possibly changing the size request
*/
gtk_menu_position (menu, TRUE);
/* Compute the size of the toplevel and realize it so we
* can scroll correctly.
*/
if (!gtk_widget_get_realized (GTK_WIDGET (menu)))
{
GtkRequisition tmp_request;
GtkAllocation tmp_allocation = { 0, };
/* Instead of trusting the menu position function to queue a
* resize when the menu goes out of bounds, invalidate the cached
* size here.
*/
gtk_widget_queue_resize (GTK_WIDGET (menu));
gtk_widget_get_preferred_size (priv->toplevel, &tmp_request, NULL);
tmp_allocation.width = tmp_request.width;
tmp_allocation.height = tmp_request.height;
gtk_widget_size_allocate (priv->toplevel, &tmp_allocation);
gtk_widget_realize (priv->toplevel);
}
gtk_menu_scroll_to (menu, priv->scroll_offset);
/* if no item is selected, select the first one */
if (!menu_shell->priv->active_menu_item &&
source_device && gdk_device_get_source (source_device) == GDK_SOURCE_TOUCHSCREEN)
gtk_menu_shell_select_first (menu_shell, TRUE);
/* Once everything is set up correctly, map the toplevel */
gtk_widget_show (priv->toplevel);
if (xgrab_shell == widget)
popup_grab_on_window (gtk_widget_get_window (widget), keyboard, pointer, activate_time); /* Should always succeed */
gtk_device_grab_add (GTK_WIDGET (menu), pointer, TRUE);
if (parent_menu_shell)
{
gboolean keyboard_mode;
keyboard_mode = _gtk_menu_shell_get_keyboard_mode (GTK_MENU_SHELL (parent_menu_shell));
_gtk_menu_shell_set_keyboard_mode (menu_shell, keyboard_mode);
}
else if (menu_shell->priv->button == 0) /* a keynav-activated context menu */
_gtk_menu_shell_set_keyboard_mode (menu_shell, TRUE);
_gtk_menu_shell_update_mnemonics (menu_shell);
}
/**
* gtk_menu_popup:
* @menu: a #GtkMenu
* @parent_menu_shell: (allow-none): the menu shell containing the
* triggering menu item, or %NULL
* @parent_menu_item: (allow-none): the menu item whose activation
* triggered the popup, or %NULL
* @func: (scope async) (allow-none): a user supplied function used to position
* the menu, or %NULL
* @data: user supplied data to be passed to @func.
* @button: the mouse button which was pressed to initiate the event.
* @activate_time: the time at which the activation event occurred.
*
* Displays a menu and makes it available for selection.
*
* Applications can use this function to display context-sensitive
* menus, and will typically supply %NULL for the @parent_menu_shell,
* @parent_menu_item, @func and @data parameters. The default menu
* positioning function will position the menu at the current mouse
* cursor position.
*
* The @button parameter should be the mouse button pressed to initiate
* the menu popup. If the menu popup was initiated by something other
* than a mouse button press, such as a mouse button release or a keypress,
* @button should be 0.
*
* The @activate_time parameter is used to conflict-resolve initiation
* of concurrent requests for mouse/keyboard grab requests. To function
* properly, this needs to be the timestamp of the user event (such as
* a mouse click or key press) that caused the initiation of the popup.
* Only if no such event is available, gtk_get_current_event_time() can
* be used instead.
*/
void
gtk_menu_popup (GtkMenu *menu,
GtkWidget *parent_menu_shell,
GtkWidget *parent_menu_item,
GtkMenuPositionFunc func,
gpointer data,
guint button,
guint32 activate_time)
{
g_return_if_fail (GTK_IS_MENU (menu));
gtk_menu_popup_for_device (menu,
NULL,
parent_menu_shell,
parent_menu_item,
func, data, NULL,
button, activate_time);
}
/**
* gtk_menu_popdown:
* @menu: a #GtkMenu
*
* Removes the menu from the screen.
*/
void
gtk_menu_popdown (GtkMenu *menu)
{
GtkMenuPrivate *priv;
GtkMenuShell *menu_shell;
GdkDevice *pointer;
g_return_if_fail (GTK_IS_MENU (menu));
menu_shell = GTK_MENU_SHELL (menu);
priv = menu->priv;
menu_shell->priv->parent_menu_shell = NULL;
menu_shell->priv->active = FALSE;
menu_shell->priv->ignore_enter = FALSE;
priv->have_position = FALSE;
gtk_menu_stop_scrolling (menu);
gtk_menu_stop_navigating_submenu (menu);
if (menu_shell->priv->active_menu_item)
{
if (priv->old_active_menu_item)
g_object_unref (priv->old_active_menu_item);
priv->old_active_menu_item = menu_shell->priv->active_menu_item;
g_object_ref (priv->old_active_menu_item);
}
gtk_menu_shell_deselect (menu_shell);
/* The X Grab, if present, will automatically be removed
* when we hide the window
*/
if (priv->toplevel)
{
gtk_widget_hide (priv->toplevel);
gtk_window_set_transient_for (GTK_WINDOW (priv->toplevel), NULL);
}
pointer = _gtk_menu_shell_get_grab_device (menu_shell);
if (priv->torn_off)
{
gtk_widget_set_size_request (priv->tearoff_window, -1, -1);
if (gtk_bin_get_child (GTK_BIN (priv->toplevel)))
{
gtk_menu_reparent (menu, priv->tearoff_hbox, TRUE);
}
else
{
/* We popped up the menu from the tearoff, so we need to
* release the grab - we aren't actually hiding the menu.
*/
if (menu_shell->priv->have_xgrab && pointer)
{
GdkDevice *keyboard;
gdk_device_ungrab (pointer, GDK_CURRENT_TIME);
keyboard = gdk_device_get_associated_device (pointer);
if (keyboard)
gdk_device_ungrab (keyboard, GDK_CURRENT_TIME);
}
}
/* gtk_menu_popdown is called each time a menu item is selected from
* a torn off menu. Only scroll back to the saved position if the
* non-tearoff menu was popped down.
*/
if (!priv->tearoff_active)
gtk_menu_scroll_to (menu, priv->saved_scroll_offset);
priv->tearoff_active = TRUE;
}
else
gtk_widget_hide (GTK_WIDGET (menu));
menu_shell->priv->have_xgrab = FALSE;
if (pointer)
gtk_device_grab_remove (GTK_WIDGET (menu), pointer);
_gtk_menu_shell_set_grab_device (menu_shell, NULL);
menu_grab_transfer_window_destroy (menu);
}
/**
* gtk_menu_get_active:
* @menu: a #GtkMenu
*
* Returns the selected menu item from the menu. This is used by the
* #GtkComboBox.
*
* Returns: (transfer none): the #GtkMenuItem that was last selected
* in the menu. If a selection has not yet been made, the
* first menu item is selected.
*/
GtkWidget*
gtk_menu_get_active (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
GtkWidget *child;
GList *children;
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
if (!priv->old_active_menu_item)
{
child = NULL;
children = GTK_MENU_SHELL (menu)->priv->children;
while (children)
{
child = children->data;
children = children->next;
if (gtk_bin_get_child (GTK_BIN (child)))
break;
child = NULL;
}
priv->old_active_menu_item = child;
if (priv->old_active_menu_item)
g_object_ref (priv->old_active_menu_item);
}
return priv->old_active_menu_item;
}
/**
* gtk_menu_set_active:
* @menu: a #GtkMenu
* @index: the index of the menu item to select. Iindex values are
* from 0 to n-1
*
* Selects the specified menu item within the menu. This is used by
* the #GtkComboBox and should not be used by anyone else.
*/
void
gtk_menu_set_active (GtkMenu *menu,
guint index)
{
GtkMenuPrivate *priv = menu->priv;
GtkWidget *child;
GList *tmp_list;
g_return_if_fail (GTK_IS_MENU (menu));
tmp_list = g_list_nth (GTK_MENU_SHELL (menu)->priv->children, index);
if (tmp_list)
{
child = tmp_list->data;
if (gtk_bin_get_child (GTK_BIN (child)))
{
if (priv->old_active_menu_item)
g_object_unref (priv->old_active_menu_item);
priv->old_active_menu_item = child;
g_object_ref (priv->old_active_menu_item);
}
}
}
/**
* gtk_menu_set_accel_group:
* @menu: a #GtkMenu
* @accel_group: (allow-none): the #GtkAccelGroup to be associated
* with the menu.
*
* Set the #GtkAccelGroup which holds global accelerators for the
* menu. This accelerator group needs to also be added to all windows
* that this menu is being used in with gtk_window_add_accel_group(),
* in order for those windows to support all the accelerators
* contained in this group.
*/
void
gtk_menu_set_accel_group (GtkMenu *menu,
GtkAccelGroup *accel_group)
{
GtkMenuPrivate *priv = menu->priv;
g_return_if_fail (GTK_IS_MENU (menu));
if (priv->accel_group != accel_group)
{
if (priv->accel_group)
g_object_unref (priv->accel_group);
priv->accel_group = accel_group;
if (priv->accel_group)
g_object_ref (priv->accel_group);
_gtk_menu_refresh_accel_paths (menu, TRUE);
}
}
/**
* gtk_menu_get_accel_group:
* @menu: a #GtkMenu
*
* Gets the #GtkAccelGroup which holds global accelerators for the
* menu. See gtk_menu_set_accel_group().
*
* Returns: (transfer none): the #GtkAccelGroup associated with the menu
*/
GtkAccelGroup*
gtk_menu_get_accel_group (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
return menu->priv->accel_group;
}
static gboolean
gtk_menu_real_can_activate_accel (GtkWidget *widget,
guint signal_id)
{
/* Menu items chain here to figure whether they can activate their
* accelerators. Unlike ordinary widgets, menus allow accel
* activation even if invisible since that's the usual case for
* submenus/popup-menus. however, the state of the attach widget
* affects the "activeness" of the menu.
*/
GtkWidget *awidget = gtk_menu_get_attach_widget (GTK_MENU (widget));
if (awidget)
return gtk_widget_can_activate_accel (awidget, signal_id);
else
return gtk_widget_is_sensitive (widget);
}
/**
* gtk_menu_set_accel_path:
* @menu: a valid #GtkMenu
* @accel_path: (allow-none): a valid accelerator path
*
* Sets an accelerator path for this menu from which accelerator paths
* for its immediate children, its menu items, can be constructed.
* The main purpose of this function is to spare the programmer the
* inconvenience of having to call gtk_menu_item_set_accel_path() on
* each menu item that should support runtime user changable accelerators.
* Instead, by just calling gtk_menu_set_accel_path() on their parent,
* each menu item of this menu, that contains a label describing its
* purpose, automatically gets an accel path assigned.
*
* For example, a menu containing menu items "New" and "Exit", will, after
* <literal>gtk_menu_set_accel_path (menu, "&lt;Gnumeric-Sheet&gt;/File");</literal>
* has been called, assign its items the accel paths:
* <literal>"&lt;Gnumeric-Sheet&gt;/File/New"</literal> and <literal>"&lt;Gnumeric-Sheet&gt;/File/Exit"</literal>.
*
* Assigning accel paths to menu items then enables the user to change
* their accelerators at runtime. More details about accelerator paths
* and their default setups can be found at gtk_accel_map_add_entry().
*
* Note that @accel_path string will be stored in a #GQuark. Therefore,
* if you pass a static string, you can save some memory by interning
* it first with g_intern_static_string().
*/
void
gtk_menu_set_accel_path (GtkMenu *menu,
const gchar *accel_path)
{
GtkMenuPrivate *priv = menu->priv;
g_return_if_fail (GTK_IS_MENU (menu));
if (accel_path)
g_return_if_fail (accel_path[0] == '<' && strchr (accel_path, '/')); /* simplistic check */
/* FIXME: accel_path should be defined as const gchar* */
priv->accel_path = (gchar*)g_intern_string (accel_path);
if (priv->accel_path)
_gtk_menu_refresh_accel_paths (menu, FALSE);
}
/**
* gtk_menu_get_accel_path:
* @menu: a valid #GtkMenu
*
* Retrieves the accelerator path set on the menu.
*
* Returns: the accelerator path set on the menu.
*
* Since: 2.14
*/
const gchar*
gtk_menu_get_accel_path (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
return menu->priv->accel_path;
}
typedef struct {
GtkMenu *menu;
gboolean group_changed;
} AccelPropagation;
static void
refresh_accel_paths_foreach (GtkWidget *widget,
gpointer data)
{
GtkMenuPrivate *priv;
AccelPropagation *prop = data;
if (GTK_IS_MENU_ITEM (widget)) /* should always be true */
{
priv = prop->menu->priv;
_gtk_menu_item_refresh_accel_path (GTK_MENU_ITEM (widget),
priv->accel_path,
priv->accel_group,
prop->group_changed);
}
}
static void
_gtk_menu_refresh_accel_paths (GtkMenu *menu,
gboolean group_changed)
{
GtkMenuPrivate *priv = menu->priv;
g_return_if_fail (GTK_IS_MENU (menu));
if (priv->accel_path && priv->accel_group)
{
AccelPropagation prop;
prop.menu = menu;
prop.group_changed = group_changed;
gtk_container_foreach (GTK_CONTAINER (menu),
refresh_accel_paths_foreach,
&prop);
}
}
/**
* gtk_menu_reposition:
* @menu: a #GtkMenu
*
* Repositions the menu according to its position function.
*/
void
gtk_menu_reposition (GtkMenu *menu)
{
g_return_if_fail (GTK_IS_MENU (menu));
if (!menu->priv->torn_off && gtk_widget_is_drawable (GTK_WIDGET (menu)))
gtk_menu_position (menu, FALSE);
}
static void
gtk_menu_scrollbar_changed (GtkAdjustment *adjustment,
GtkMenu *menu)
{
double value;
value = gtk_adjustment_get_value (adjustment);
if (menu->priv->scroll_offset != value)
gtk_menu_scroll_to (menu, value);
}
static void
gtk_menu_set_tearoff_hints (GtkMenu *menu,
gint width)
{
GtkMenuPrivate *priv = menu->priv;
GdkGeometry geometry_hints;
if (!priv->tearoff_window)
return;
if (gtk_widget_get_visible (priv->tearoff_scrollbar))
{
GtkRequisition requisition;
gtk_widget_get_preferred_size (priv->tearoff_scrollbar,
&requisition, NULL);
width += requisition.width;
}
geometry_hints.min_width = width;
geometry_hints.max_width = width;
geometry_hints.min_height = 0;
geometry_hints.max_height = priv->requested_height;
gtk_window_set_geometry_hints (GTK_WINDOW (priv->tearoff_window),
NULL,
&geometry_hints,
GDK_HINT_MAX_SIZE|GDK_HINT_MIN_SIZE);
}
static void
gtk_menu_update_title (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
if (priv->tearoff_window)
{
const gchar *title;
GtkWidget *attach_widget;
title = gtk_menu_get_title (menu);
if (!title)
{
attach_widget = gtk_menu_get_attach_widget (menu);
if (GTK_IS_MENU_ITEM (attach_widget))
{
GtkWidget *child = gtk_bin_get_child (GTK_BIN (attach_widget));
if (GTK_IS_LABEL (child))
title = gtk_label_get_text (GTK_LABEL (child));
}
}
if (title)
gtk_window_set_title (GTK_WINDOW (priv->tearoff_window), title);
}
}
static GtkWidget*
gtk_menu_get_toplevel (GtkWidget *menu)
{
GtkWidget *attach, *toplevel;
attach = gtk_menu_get_attach_widget (GTK_MENU (menu));
if (GTK_IS_MENU_ITEM (attach))
attach = gtk_widget_get_parent (attach);
if (GTK_IS_MENU (attach))
return gtk_menu_get_toplevel (attach);
else if (GTK_IS_WIDGET (attach))
{
toplevel = gtk_widget_get_toplevel (attach);
if (gtk_widget_is_toplevel (toplevel))
return toplevel;
}
return NULL;
}
static void
tearoff_window_destroyed (GtkWidget *widget,
GtkMenu *menu)
{
gtk_menu_set_tearoff_state (menu, FALSE);
}
/**
* gtk_menu_set_tearoff_state:
* @menu: a #GtkMenu
* @torn_off: If %TRUE, menu is displayed as a tearoff menu.
*
* Changes the tearoff state of the menu. A menu is normally
* displayed as drop down menu which persists as long as the menu is
* active. It can also be displayed as a tearoff menu which persists
* until it is closed or reattached.
*/
void
gtk_menu_set_tearoff_state (GtkMenu *menu,
gboolean torn_off)
{
GtkMenuPrivate *priv = menu->priv;
gint height;
g_return_if_fail (GTK_IS_MENU (menu));
if (priv->torn_off != torn_off)
{
priv->torn_off = torn_off;
priv->tearoff_active = torn_off;
if (priv->torn_off)
{
if (gtk_widget_get_visible (GTK_WIDGET (menu)))
gtk_menu_popdown (menu);
if (!priv->tearoff_window)
{
GtkWidget *toplevel;
priv->tearoff_window = g_object_new (GTK_TYPE_WINDOW,
"type", GTK_WINDOW_TOPLEVEL,
"screen", gtk_widget_get_screen (priv->toplevel),
"app-paintable", TRUE,
NULL);
gtk_window_set_type_hint (GTK_WINDOW (priv->tearoff_window),
GDK_WINDOW_TYPE_HINT_MENU);
gtk_window_set_mnemonic_modifier (GTK_WINDOW (priv->tearoff_window), 0);
g_signal_connect (priv->tearoff_window, "destroy",
G_CALLBACK (tearoff_window_destroyed), menu);
g_signal_connect (priv->tearoff_window, "event",
G_CALLBACK (gtk_menu_window_event), menu);
gtk_menu_update_title (menu);
gtk_widget_realize (priv->tearoff_window);
toplevel = gtk_menu_get_toplevel (GTK_WIDGET (menu));
if (toplevel != NULL)
gtk_window_set_transient_for (GTK_WINDOW (priv->tearoff_window),
GTK_WINDOW (toplevel));
priv->tearoff_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_container_add (GTK_CONTAINER (priv->tearoff_window),
priv->tearoff_hbox);
height = gdk_window_get_height (gtk_widget_get_window (GTK_WIDGET (menu)));
priv->tearoff_adjustment = gtk_adjustment_new (0,
0, priv->requested_height,
MENU_SCROLL_STEP2,
height/2,
height);
g_object_connect (priv->tearoff_adjustment,
"signal::value-changed", gtk_menu_scrollbar_changed, menu,
NULL);
priv->tearoff_scrollbar = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, priv->tearoff_adjustment);
gtk_box_pack_end (GTK_BOX (priv->tearoff_hbox),
priv->tearoff_scrollbar,
FALSE, FALSE, 0);
if (gtk_adjustment_get_upper (priv->tearoff_adjustment) > height)
gtk_widget_show (priv->tearoff_scrollbar);
gtk_widget_show (priv->tearoff_hbox);
}
gtk_menu_reparent (menu, priv->tearoff_hbox, FALSE);
/* Update menu->requisition */
gtk_widget_get_preferred_size (GTK_WIDGET (menu), NULL, NULL);
gtk_menu_set_tearoff_hints (menu, gdk_window_get_width (gtk_widget_get_window (GTK_WIDGET (menu))));
gtk_widget_realize (priv->tearoff_window);
gtk_menu_position (menu, TRUE);
gtk_widget_show (GTK_WIDGET (menu));
gtk_widget_show (priv->tearoff_window);
gtk_menu_scroll_to (menu, 0);
}
else
{
gtk_widget_hide (GTK_WIDGET (menu));
gtk_widget_hide (priv->tearoff_window);
if (GTK_IS_CONTAINER (priv->toplevel))
gtk_menu_reparent (menu, priv->toplevel, FALSE);
gtk_widget_destroy (priv->tearoff_window);
priv->tearoff_window = NULL;
priv->tearoff_hbox = NULL;
priv->tearoff_scrollbar = NULL;
priv->tearoff_adjustment = NULL;
}
g_object_notify (G_OBJECT (menu), "tearoff-state");
}
}
/**
* gtk_menu_get_tearoff_state:
* @menu: a #GtkMenu
*
* Returns whether the menu is torn off.
* See gtk_menu_set_tearoff_state().
*
* Return value: %TRUE if the menu is currently torn off.
*/
gboolean
gtk_menu_get_tearoff_state (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), FALSE);
return menu->priv->torn_off;
}
/**
* gtk_menu_set_title:
* @menu: a #GtkMenu
* @title: a string containing the title for the menu
*
* Sets the title string for the menu.
*
* The title is displayed when the menu is shown as a tearoff
* menu. If @title is %NULL, the menu will see if it is attached
* to a parent menu item, and if so it will try to use the same
* text as that menu item's label.
*/
void
gtk_menu_set_title (GtkMenu *menu,
const gchar *title)
{
GtkMenuPrivate *priv = menu->priv;
char *old_title;
g_return_if_fail (GTK_IS_MENU (menu));
old_title = priv->title;
priv->title = g_strdup (title);
g_free (old_title);
gtk_menu_update_title (menu);
g_object_notify (G_OBJECT (menu), "tearoff-title");
}
/**
* gtk_menu_get_title:
* @menu: a #GtkMenu
*
* Returns the title of the menu. See gtk_menu_set_title().
*
* Return value: the title of the menu, or %NULL if the menu
* has no title set on it. This string is owned by GTK+
* and should not be modified or freed.
**/
const gchar *
gtk_menu_get_title (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
return menu->priv->title;
}
/**
* gtk_menu_reorder_child:
* @menu: a #GtkMenu
* @child: the #GtkMenuItem to move
* @position: the new position to place @child.
* Positions are numbered from 0 to n - 1
*
* Moves @child to a new @position in the list of @menu
* children.
*/
void
gtk_menu_reorder_child (GtkMenu *menu,
GtkWidget *child,
gint position)
{
GtkMenuShell *menu_shell;
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (GTK_IS_MENU_ITEM (child));
menu_shell = GTK_MENU_SHELL (menu);
if (g_list_find (menu_shell->priv->children, child))
{
menu_shell->priv->children = g_list_remove (menu_shell->priv->children, child);
menu_shell->priv->children = g_list_insert (menu_shell->priv->children, child, position);
menu_queue_resize (menu);
}
}
static void
gtk_menu_style_updated (GtkWidget *widget)
{
GTK_WIDGET_CLASS (gtk_menu_parent_class)->style_updated (widget);
if (gtk_widget_get_realized (widget))
{
GtkMenu *menu = GTK_MENU (widget);
GtkMenuPrivate *priv = menu->priv;
GtkStyleContext *context;
context = gtk_widget_get_style_context (widget);
gtk_style_context_set_background (context, priv->bin_window);
gtk_style_context_set_background (context, priv->view_window);
gtk_style_context_set_background (context, gtk_widget_get_window (widget));
}
}
static void
get_arrows_border (GtkMenu *menu,
GtkBorder *border)
{
GtkMenuPrivate *priv = menu->priv;
guint scroll_arrow_height;
GtkArrowPlacement arrow_placement;
gtk_widget_style_get (GTK_WIDGET (menu),
"scroll-arrow-vlength", &scroll_arrow_height,
"arrow_placement", &arrow_placement,
NULL);
switch (arrow_placement)
{
case GTK_ARROWS_BOTH:
border->top = priv->upper_arrow_visible ? scroll_arrow_height : 0;
border->bottom = priv->lower_arrow_visible ? scroll_arrow_height : 0;
break;
case GTK_ARROWS_START:
border->top = (priv->upper_arrow_visible ||
priv->lower_arrow_visible) ? scroll_arrow_height : 0;
border->bottom = 0;
break;
case GTK_ARROWS_END:
border->top = 0;
border->bottom = (priv->upper_arrow_visible ||
priv->lower_arrow_visible) ? scroll_arrow_height : 0;
break;
}
border->left = border->right = 0;
}
static void
get_menu_padding (GtkWidget *widget,
GtkBorder *padding)
{
GtkStyleContext *context;
GtkStateFlags state;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_padding (context, state, padding);
}
static void
gtk_menu_realize (GtkWidget *widget)
{
GtkMenu *menu = GTK_MENU (widget);
GtkMenuPrivate *priv = menu->priv;
GtkAllocation allocation;
GtkStyleContext *context;
GdkWindow *window;
GdkWindowAttr attributes;
gint attributes_mask;
gint border_width;
GtkWidget *child;
GList *children;
guint vertical_padding;
guint horizontal_padding;
GtkBorder arrow_border, padding;
g_return_if_fail (GTK_IS_MENU (widget));
gtk_widget_set_realized (widget, TRUE);
gtk_widget_get_allocation (widget, &allocation);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.event_mask = gtk_widget_get_events (widget);
attributes.event_mask |= (GDK_EXPOSURE_MASK | GDK_KEY_PRESS_MASK |
GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK );
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gtk_widget_set_window (widget, window);
gdk_window_set_user_data (window, widget);
get_menu_padding (widget, &padding);
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
context = gtk_widget_get_style_context (widget);
gtk_widget_style_get (GTK_WIDGET (menu),
"vertical-padding", &vertical_padding,
"horizontal-padding", &horizontal_padding,
NULL);
gtk_widget_get_allocation (widget, &allocation);
attributes.x = border_width + padding.left + horizontal_padding;
attributes.y = border_width + padding.top + vertical_padding;
attributes.width = allocation.width -
(2 * (border_width + horizontal_padding)) - padding.left - padding.right;
attributes.height = allocation.height -
(2 * (border_width + vertical_padding)) - padding.top - padding.bottom;
get_arrows_border (menu, &arrow_border);
attributes.y += arrow_border.top;
attributes.height -= arrow_border.top;
attributes.height -= arrow_border.bottom;
attributes.width = MAX (1, attributes.width);
attributes.height = MAX (1, attributes.height);
priv->view_window = gdk_window_new (window,
&attributes, attributes_mask);
gdk_window_set_user_data (priv->view_window, menu);
gtk_widget_get_allocation (widget, &allocation);
attributes.x = 0;
attributes.y = 0;
attributes.width = allocation.width + (2 * (border_width + horizontal_padding)) +
padding.left + padding.right;
attributes.height = priv->requested_height - (2 * (border_width + vertical_padding)) +
padding.top + padding.bottom;
attributes.width = MAX (1, attributes.width);
attributes.height = MAX (1, attributes.height);
priv->bin_window = gdk_window_new (priv->view_window,
&attributes, attributes_mask);
gdk_window_set_user_data (priv->bin_window, menu);
children = GTK_MENU_SHELL (menu)->priv->children;
while (children)
{
child = children->data;
children = children->next;
gtk_widget_set_parent_window (child, priv->bin_window);
}
gtk_style_context_set_background (context, priv->bin_window);
gtk_style_context_set_background (context, priv->view_window);
gtk_style_context_set_background (context, window);
if (GTK_MENU_SHELL (widget)->priv->active_menu_item)
gtk_menu_scroll_item_visible (GTK_MENU_SHELL (widget),
GTK_MENU_SHELL (widget)->priv->active_menu_item);
gdk_window_show (priv->bin_window);
gdk_window_show (priv->view_window);
}
static gboolean
gtk_menu_focus (GtkWidget *widget,
GtkDirectionType direction)
{
/* A menu or its menu items cannot have focus */
return FALSE;
}
/* See notes in gtk_menu_popup() for information
* about the "grab transfer window"
*/
static GdkWindow *
menu_grab_transfer_window_get (GtkMenu *menu)
{
GdkWindow *window = g_object_get_data (G_OBJECT (menu), "gtk-menu-transfer-window");
if (!window)
{
GdkWindowAttr attributes;
gint attributes_mask;
attributes.x = -100;
attributes.y = -100;
attributes.width = 10;
attributes.height = 10;
attributes.window_type = GDK_WINDOW_TEMP;
attributes.wclass = GDK_INPUT_ONLY;
attributes.override_redirect = TRUE;
attributes.event_mask = 0;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;
window = gdk_window_new (gtk_widget_get_root_window (GTK_WIDGET (menu)),
&attributes, attributes_mask);
gdk_window_set_user_data (window, menu);
gdk_window_show (window);
g_object_set_data (G_OBJECT (menu), I_("gtk-menu-transfer-window"), window);
}
return window;
}
static void
menu_grab_transfer_window_destroy (GtkMenu *menu)
{
GdkWindow *window = g_object_get_data (G_OBJECT (menu), "gtk-menu-transfer-window");
if (window)
{
gdk_window_set_user_data (window, NULL);
gdk_window_destroy (window);
g_object_set_data (G_OBJECT (menu), I_("gtk-menu-transfer-window"), NULL);
}
}
static void
gtk_menu_unrealize (GtkWidget *widget)
{
GtkMenu *menu = GTK_MENU (widget);
GtkMenuPrivate *priv = menu->priv;
menu_grab_transfer_window_destroy (menu);
gdk_window_set_user_data (priv->view_window, NULL);
gdk_window_destroy (priv->view_window);
priv->view_window = NULL;
gdk_window_set_user_data (priv->bin_window, NULL);
gdk_window_destroy (priv->bin_window);
priv->bin_window = NULL;
GTK_WIDGET_CLASS (gtk_menu_parent_class)->unrealize (widget);
}
static gint
calculate_line_heights (GtkMenu *menu,
gint for_width,
guint **ret_min_heights,
guint **ret_nat_heights)
{
GtkBorder padding;
GtkMenuPrivate *priv;
GtkMenuShell *menu_shell;
GtkWidget *child, *widget;
GList *children;
guint horizontal_padding;
guint border_width;
guint n_columns;
gint n_heights;
guint *min_heights;
guint *nat_heights;
gint avail_width;
priv = menu->priv;
widget = GTK_WIDGET (menu);
menu_shell = GTK_MENU_SHELL (widget);
min_heights = g_new0 (guint, gtk_menu_get_n_rows (menu));
nat_heights = g_new0 (guint, gtk_menu_get_n_rows (menu));
n_heights = gtk_menu_get_n_rows (menu);
n_columns = gtk_menu_get_n_columns (menu);
avail_width = for_width - (2 * priv->toggle_size + priv->accel_size) * n_columns;
gtk_widget_style_get (GTK_WIDGET (menu),
"horizontal-padding", &horizontal_padding,
NULL);
get_menu_padding (widget, &padding);
border_width = gtk_container_get_border_width (GTK_CONTAINER (menu));
avail_width -= (border_width + horizontal_padding) * 2 + padding.left + padding.right;
for (children = menu_shell->priv->children; children; children = children->next)
{
gint part;
gint toggle_size;
gint l, r, t, b;
gint child_min, child_nat;
child = children->data;
if (!gtk_widget_get_visible (child))
continue;
get_effective_child_attach (child, &l, &r, &t, &b);
part = avail_width / (r - l);
gtk_widget_get_preferred_height_for_width (child, part,
&child_min, &child_nat);
gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child), &toggle_size);
part = MAX (child_min, toggle_size) / (b - t);
min_heights[t] = MAX (min_heights[t], part);
part = MAX (child_nat, toggle_size) / (b - t);
nat_heights[t] = MAX (nat_heights[t], part);
}
if (ret_min_heights)
*ret_min_heights = min_heights;
else
g_free (min_heights);
if (ret_nat_heights)
*ret_nat_heights = nat_heights;
else
g_free (nat_heights);
return n_heights;
}
static void
gtk_menu_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkMenu *menu;
GtkMenuPrivate *priv;
GtkMenuShell *menu_shell;
GtkWidget *child;
GtkAllocation child_allocation;
GList *children;
gint x, y, i;
gint width, height;
guint border_width;
guint vertical_padding;
guint horizontal_padding;
GtkBorder padding;
g_return_if_fail (GTK_IS_MENU (widget));
g_return_if_fail (allocation != NULL);
menu = GTK_MENU (widget);
menu_shell = GTK_MENU_SHELL (widget);
priv = menu->priv;
gtk_widget_set_allocation (widget, allocation);
gtk_widget_style_get (GTK_WIDGET (menu),
"vertical-padding", &vertical_padding,
"horizontal-padding", &horizontal_padding,
NULL);
get_menu_padding (widget, &padding);
border_width = gtk_container_get_border_width (GTK_CONTAINER (menu));
g_free (priv->heights);
priv->heights_length = calculate_line_heights (menu,
allocation->width,
&priv->heights,
NULL);
/* refresh our cached height request */
priv->requested_height = (2 * (border_width + vertical_padding)) +
padding.top + padding.bottom;
for (i = 0; i < priv->heights_length; i++)
priv->requested_height += priv->heights[i];
x = border_width + padding.left + horizontal_padding;
y = border_width + padding.top + vertical_padding;
width = allocation->width - (2 * (border_width + horizontal_padding)) -
padding.left - padding.right;
height = allocation->height - (2 * (border_width + vertical_padding)) -
padding.top - padding.bottom;
if (menu_shell->priv->active)
gtk_menu_scroll_to (menu, priv->scroll_offset);
if (!priv->tearoff_active)
{
GtkBorder arrow_border;
get_arrows_border (menu, &arrow_border);
y += arrow_border.top;
height -= arrow_border.top;
height -= arrow_border.bottom;
}
width = MAX (1, width);
height = MAX (1, height);
if (gtk_widget_get_realized (widget))
{
gdk_window_move_resize (gtk_widget_get_window (widget),
allocation->x, allocation->y,
allocation->width, allocation->height);
gdk_window_move_resize (priv->view_window, x, y, width, height);
}
if (menu_shell->priv->children)
{
gint base_width = width / gtk_menu_get_n_columns (menu);
children = menu_shell->priv->children;
while (children)
{
child = children->data;
children = children->next;
if (gtk_widget_get_visible (child))
{
gint i;
gint l, r, t, b;
get_effective_child_attach (child, &l, &r, &t, &b);
if (gtk_widget_get_direction (GTK_WIDGET (menu)) == GTK_TEXT_DIR_RTL)
{
guint tmp;
tmp = gtk_menu_get_n_columns (menu) - l;
l = gtk_menu_get_n_columns (menu) - r;
r = tmp;
}
child_allocation.width = (r - l) * base_width;
child_allocation.height = 0;
child_allocation.x = l * base_width;
child_allocation.y = 0;
for (i = 0; i < b; i++)
{
if (i < t)
child_allocation.y += priv->heights[i];
else
child_allocation.height += priv->heights[i];
}
gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child),
priv->toggle_size);
gtk_widget_size_allocate (child, &child_allocation);
gtk_widget_queue_draw (child);
}
}
/* Resize the item window */
if (gtk_widget_get_realized (widget))
{
gint i;
gint width, height;
height = 0;
for (i = 0; i < gtk_menu_get_n_rows (menu); i++)
height += priv->heights[i];
width = gtk_menu_get_n_columns (menu) * base_width;
gdk_window_resize (priv->bin_window, width, height);
}
if (priv->tearoff_active)
{
if (height >= priv->requested_height)
{
if (gtk_widget_get_visible (priv->tearoff_scrollbar))
{
gtk_widget_hide (priv->tearoff_scrollbar);
gtk_menu_set_tearoff_hints (menu, allocation->width);
gtk_menu_scroll_to (menu, 0);
}
}
else
{
gtk_adjustment_configure (priv->tearoff_adjustment,
gtk_adjustment_get_value (priv->tearoff_adjustment),
0,
priv->requested_height,
gtk_adjustment_get_step_increment (priv->tearoff_adjustment),
gtk_adjustment_get_page_increment (priv->tearoff_adjustment),
allocation->height);
if (!gtk_widget_get_visible (priv->tearoff_scrollbar))
{
gtk_widget_show (priv->tearoff_scrollbar);
gtk_menu_set_tearoff_hints (menu, allocation->width);
}
}
}
}
}
static void
get_arrows_visible_area (GtkMenu *menu,
GdkRectangle *border,
GdkRectangle *upper,
GdkRectangle *lower,
gint *arrow_space)
{
GtkArrowPlacement arrow_placement;
GtkWidget *widget = GTK_WIDGET (menu);
guint border_width;
guint vertical_padding;
guint horizontal_padding;
gint scroll_arrow_height;
GtkBorder menu_padding;
gtk_widget_style_get (widget,
"vertical-padding", &vertical_padding,
"horizontal-padding", &horizontal_padding,
"scroll-arrow-vlength", &scroll_arrow_height,
"arrow-placement", &arrow_placement,
NULL);
get_menu_padding (widget, &menu_padding);
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
border->x = border_width + menu_padding.left + horizontal_padding;
border->y = border_width + menu_padding.top + vertical_padding;
border->width = gdk_window_get_width (gtk_widget_get_window (widget));
border->height = gdk_window_get_height (gtk_widget_get_window (widget));
switch (arrow_placement)
{
case GTK_ARROWS_BOTH:
upper->x = border->x;
upper->y = border->y;
upper->width = border->width - 2 * border->x;
upper->height = scroll_arrow_height;
lower->x = border->x;
lower->y = border->height - border->y - scroll_arrow_height;
lower->width = border->width - 2 * border->x;
lower->height = scroll_arrow_height;
break;
case GTK_ARROWS_START:
upper->x = border->x;
upper->y = border->y;
upper->width = (border->width - 2 * border->x) / 2;
upper->height = scroll_arrow_height;
lower->x = border->x + upper->width;
lower->y = border->y;
lower->width = (border->width - 2 * border->x) / 2;
lower->height = scroll_arrow_height;
break;
case GTK_ARROWS_END:
upper->x = border->x;
upper->y = border->height - border->y - scroll_arrow_height;
upper->width = (border->width - 2 * border->x) / 2;
upper->height = scroll_arrow_height;
lower->x = border->x + upper->width;
lower->y = border->height - border->y - scroll_arrow_height;
lower->width = (border->width - 2 * border->x) / 2;
lower->height = scroll_arrow_height;
break;
default:
g_assert_not_reached();
upper->x = upper->y = upper->width = upper->height = 0;
lower->x = lower->y = lower->width = lower->height = 0;
}
*arrow_space = scroll_arrow_height - menu_padding.top - menu_padding.bottom;
}
static gboolean
gtk_menu_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkMenu *menu;
GtkMenuPrivate *priv;
GtkStyleContext *context;
GdkRectangle border;
GdkRectangle upper;
GdkRectangle lower;
gint arrow_space;
GtkBorder menu_padding;
menu = GTK_MENU (widget);
priv = menu->priv;
context = gtk_widget_get_style_context (widget);
get_arrows_visible_area (menu, &border, &upper, &lower, &arrow_space);
get_menu_padding (widget, &menu_padding);
if (gtk_cairo_should_draw_window (cr, gtk_widget_get_window (widget)))
{
gfloat arrow_scaling;
gint arrow_size;
gtk_widget_style_get (widget, "arrow-scaling", &arrow_scaling, NULL);
arrow_size = arrow_scaling * arrow_space;
gtk_render_background (context, cr, 0, 0,
gtk_widget_get_allocated_width (widget),
gtk_widget_get_allocated_height (widget));
gtk_render_frame (context, cr, 0, 0,
gtk_widget_get_allocated_width (widget),
gtk_widget_get_allocated_height (widget));
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_BUTTON);
if (priv->upper_arrow_visible && !priv->tearoff_active)
{
gtk_style_context_save (context);
gtk_style_context_set_state (context, priv->upper_arrow_state);
gtk_render_background (context, cr,
upper.x, upper.y,
upper.width, upper.height);
gtk_render_frame (context, cr,
upper.x, upper.y,
upper.width, upper.height);
gtk_render_arrow (context, cr, 0,
upper.x + (upper.width - arrow_size) / 2,
upper.y + menu_padding.top + (arrow_space - arrow_size) / 2,
arrow_size);
gtk_style_context_restore (context);
}
if (priv->lower_arrow_visible && !priv->tearoff_active)
{
gtk_style_context_save (context);
gtk_style_context_set_state (context, priv->lower_arrow_state);
gtk_render_background (context, cr,
lower.x, lower.y,
lower.width, lower.height);
gtk_render_frame (context, cr,
lower.x, lower.y,
lower.width, lower.height);
gtk_render_arrow (context, cr, G_PI,
lower.x + (lower.width - arrow_size) / 2,
lower.y + menu_padding.bottom + (arrow_space - arrow_size) / 2,
arrow_size);
gtk_style_context_restore (context);
}
gtk_style_context_restore (context);
}
if (gtk_cairo_should_draw_window (cr, priv->bin_window))
{
gint y = -border.y + priv->scroll_offset;
cairo_save (cr);
gtk_cairo_transform_to_window (cr, widget, priv->bin_window);
if (!priv->tearoff_active)
{
GtkBorder arrow_border;
get_arrows_border (menu, &arrow_border);
y -= arrow_border.top;
}
gtk_render_background (context, cr,
- border.x, y,
border.width, border.height);
gtk_render_frame (context, cr,
- border.x, y,
border.width, border.height);
cairo_restore (cr);
}
GTK_WIDGET_CLASS (gtk_menu_parent_class)->draw (widget, cr);
return FALSE;
}
static void
gtk_menu_show (GtkWidget *widget)
{
GtkMenu *menu = GTK_MENU (widget);
_gtk_menu_refresh_accel_paths (menu, FALSE);
GTK_WIDGET_CLASS (gtk_menu_parent_class)->show (widget);
}
static void
gtk_menu_get_preferred_width (GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
GtkMenu *menu;
GtkMenuShell *menu_shell;
GtkMenuPrivate *priv;
GtkWidget *child;
GList *children;
guint max_toggle_size;
guint max_accel_width;
guint horizontal_padding;
guint border_width;
gint child_min, child_nat;
gint min_width, nat_width;
GtkBorder padding;
menu = GTK_MENU (widget);
menu_shell = GTK_MENU_SHELL (widget);
priv = menu->priv;
min_width = nat_width = 0;
max_toggle_size = 0;
max_accel_width = 0;
children = menu_shell->priv->children;
while (children)
{
gint part;
gint toggle_size;
gint l, r, t, b;
child = children->data;
children = children->next;
if (! gtk_widget_get_visible (child))
continue;
get_effective_child_attach (child, &l, &r, &t, &b);
/* It's important to size_request the child
* before doing the toggle size request, in
* case the toggle size request depends on the size
* request of a child of the child (e.g. for ImageMenuItem)
*/
gtk_widget_get_preferred_width (child, &child_min, &child_nat);
gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child), &toggle_size);
max_toggle_size = MAX (max_toggle_size, toggle_size);
max_accel_width = MAX (max_accel_width,
GTK_MENU_ITEM (child)->priv->accelerator_width);
part = child_min / (r - l);
min_width = MAX (min_width, part);
part = child_nat / (r - l);
nat_width = MAX (nat_width, part);
}
/* If the menu doesn't include any images or check items
* reserve the space so that all menus are consistent.
* We only do this for 'ordinary' menus, not for combobox
* menus or multi-column menus
*/
if (max_toggle_size == 0 &&
gtk_menu_get_n_columns (menu) == 1 &&
!priv->no_toggle_size)
{
GtkStyleContext *context;
GtkWidgetPath *check_path;
guint toggle_spacing;
guint indicator_size;
context = gtk_style_context_new ();
/* Create a GtkCheckMenuItem path, only to query indicator spacing */
check_path = _gtk_widget_create_path (widget);
gtk_widget_path_append_type (check_path, GTK_TYPE_CHECK_MENU_ITEM);
gtk_style_context_set_path (context, check_path);
gtk_widget_path_free (check_path);
gtk_style_context_set_screen (context, gtk_widget_get_screen (widget));
gtk_style_context_get_style (context,
"toggle-spacing", &toggle_spacing,
"indicator-size", &indicator_size,
NULL);
max_toggle_size = indicator_size + toggle_spacing;
g_object_unref (context);
}
min_width += 2 * max_toggle_size + max_accel_width;
min_width *= gtk_menu_get_n_columns (menu);
nat_width += 2 * max_toggle_size + max_accel_width;
nat_width *= gtk_menu_get_n_columns (menu);
gtk_widget_style_get (GTK_WIDGET (menu),
"horizontal-padding", &horizontal_padding,
NULL);
get_menu_padding (widget, &padding);
border_width = gtk_container_get_border_width (GTK_CONTAINER (menu));
min_width += (2 * (border_width + horizontal_padding)) +
padding.left + padding.right;
nat_width += (2 * (border_width + horizontal_padding)) +
padding.left + padding.right;
priv->toggle_size = max_toggle_size;
priv->accel_size = max_accel_width;
if (minimum_size)
*minimum_size = min_width;
if (natural_size)
*natural_size = nat_width;
/* Don't resize the tearoff if it is not active,
* because it won't redraw (it is only a background pixmap).
*/
if (priv->tearoff_active)
gtk_menu_set_tearoff_hints (menu, min_width);
}
static void
gtk_menu_get_preferred_height (GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
gint min_width;
/* Menus are height-for-width only, just return the height
* for the minimum width
*/
GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_width, NULL);
GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width (widget, min_width, minimum_size, natural_size);
}
static void
gtk_menu_get_preferred_height_for_width (GtkWidget *widget,
gint for_size,
gint *minimum_size,
gint *natural_size)
{
GtkBorder padding;
GtkMenu *menu = GTK_MENU (widget);
GtkMenuPrivate *priv = menu->priv;
guint *min_heights, *nat_heights;
guint vertical_padding, border_width;
gint n_heights, i;
gint min_height, nat_height;
gtk_widget_style_get (widget, "vertical-padding", &vertical_padding, NULL);
border_width = gtk_container_get_border_width (GTK_CONTAINER (menu));
get_menu_padding (widget, &padding);
min_height = nat_height = (border_width + vertical_padding) * 2 +
padding.top + padding.bottom;
n_heights =
calculate_line_heights (menu, for_size, &min_heights, &nat_heights);
for (i = 0; i < n_heights; i++)
{
min_height += min_heights[i];
nat_height += nat_heights[i];
}
if (priv->have_position)
{
GdkScreen *screen = gtk_widget_get_screen (priv->toplevel);
GdkRectangle monitor;
gdk_screen_get_monitor_workarea (screen, priv->monitor_num, &monitor);
if (priv->position_y + min_height > monitor.y + monitor.height)
min_height = monitor.y + monitor.height - priv->position_y;
if (priv->position_y + nat_height > monitor.y + monitor.height)
nat_height = monitor.y + monitor.height - priv->position_y;
if (priv->position_y < monitor.y)
{
min_height -= monitor.y - priv->position_y;
nat_height -= monitor.y - priv->position_y;
}
}
if (minimum_size)
*minimum_size = min_height;
if (natural_size)
*natural_size = nat_height;
g_free (min_heights);
g_free (nat_heights);
}
static gboolean
pointer_in_menu_window (GtkWidget *widget,
gdouble x_root,
gdouble y_root)
{
GtkMenu *menu = GTK_MENU (widget);
GtkMenuPrivate *priv = menu->priv;
GtkAllocation allocation;
if (gtk_widget_get_mapped (priv->toplevel))
{
GtkMenuShell *menu_shell;
gint window_x, window_y;
gdk_window_get_position (gtk_widget_get_window (priv->toplevel),
&window_x, &window_y);
gtk_widget_get_allocation (widget, &allocation);
if (x_root >= window_x && x_root < window_x + allocation.width &&
y_root >= window_y && y_root < window_y + allocation.height)
return TRUE;
menu_shell = GTK_MENU_SHELL (widget);
if (GTK_IS_MENU (menu_shell->priv->parent_menu_shell))
return pointer_in_menu_window (menu_shell->priv->parent_menu_shell,
x_root, y_root);
}
return FALSE;
}
static gboolean
gtk_menu_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GdkDevice *source_device;
GtkWidget *event_widget;
GtkMenu *menu;
if (event->type != GDK_BUTTON_PRESS)
return FALSE;
source_device = gdk_event_get_source_device ((GdkEvent *) event);
event_widget = gtk_get_event_widget ((GdkEvent *) event);
menu = GTK_MENU (widget);
/* Don't pass down to menu shell if a non-menuitem part of the menu
* was clicked. The check for the event_widget being a GtkMenuShell
* works because we have the pointer grabbed on menu_shell->window
* with owner_events=TRUE, so all events that are either outside
* the menu or on its border are delivered relative to
* menu_shell->window.
*/
if (GTK_IS_MENU_SHELL (event_widget) &&
pointer_in_menu_window (widget, event->x_root, event->y_root))
return TRUE;
if (GTK_IS_MENU_ITEM (event_widget) &&
gdk_device_get_source (source_device) == GDK_SOURCE_TOUCHSCREEN &&
GTK_MENU_ITEM (event_widget)->priv->submenu != NULL &&
!gtk_widget_is_drawable (GTK_MENU_ITEM (event_widget)->priv->submenu))
menu->priv->ignore_button_release = TRUE;
return GTK_WIDGET_CLASS (gtk_menu_parent_class)->button_press_event (widget, event);
}
static gboolean
gtk_menu_button_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkMenuPrivate *priv = GTK_MENU (widget)->priv;
if (priv->ignore_button_release)
{
priv->ignore_button_release = FALSE;
return FALSE;
}
if (event->type != GDK_BUTTON_RELEASE)
return FALSE;
/* Don't pass down to menu shell if a non-menuitem part of the menu
* was clicked (see comment in button_press()).
*/
if (GTK_IS_MENU_SHELL (gtk_get_event_widget ((GdkEvent *) event)) &&
pointer_in_menu_window (widget, event->x_root, event->y_root))
{
/* Ugly: make sure menu_shell->button gets reset to 0 when we
* bail out early here so it is in a consistent state for the
* next button_press/button_release in GtkMenuShell.
* See bug #449371.
*/
if (GTK_MENU_SHELL (widget)->priv->active)
GTK_MENU_SHELL (widget)->priv->button = 0;
return TRUE;
}
return GTK_WIDGET_CLASS (gtk_menu_parent_class)->button_release_event (widget, event);
}
static const gchar *
get_accel_path (GtkWidget *menu_item,
gboolean *locked)
{
const gchar *path;
GtkWidget *label;
GClosure *accel_closure;
GtkAccelGroup *accel_group;
path = _gtk_widget_get_accel_path (menu_item, locked);
if (!path)
{
path = GTK_MENU_ITEM (menu_item)->priv->accel_path;
if (locked)
{
*locked = TRUE;
label = gtk_bin_get_child (GTK_BIN (menu_item));
if (GTK_IS_ACCEL_LABEL (label))
{
g_object_get (label,
"accel-closure", &accel_closure,
NULL);
if (accel_closure)
{
accel_group = gtk_accel_group_from_accel_closure (accel_closure);
*locked = gtk_accel_group_get_is_locked (accel_group);
}
}
}
}
return path;
}
static gboolean
gtk_menu_key_press (GtkWidget *widget,
GdkEventKey *event)
{
GtkMenuShell *menu_shell;
GtkMenu *menu;
gboolean delete = FALSE;
gboolean can_change_accels;
gchar *accel = NULL;
guint accel_key, accel_mods;
GdkModifierType consumed_modifiers;
GdkDisplay *display;
g_return_val_if_fail (GTK_IS_MENU (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
menu_shell = GTK_MENU_SHELL (widget);
menu = GTK_MENU (widget);
gtk_menu_stop_navigating_submenu (menu);
if (GTK_WIDGET_CLASS (gtk_menu_parent_class)->key_press_event (widget, event))
return TRUE;
display = gtk_widget_get_display (widget);
g_object_get (gtk_widget_get_settings (widget),
"gtk-menu-bar-accel", &accel,
"gtk-can-change-accels", &can_change_accels,
NULL);
if (accel && *accel)
{
guint keyval = 0;
GdkModifierType mods = 0;
gtk_accelerator_parse (accel, &keyval, &mods);
if (keyval == 0)
g_warning ("Failed to parse menu bar accelerator '%s'\n", accel);
/* FIXME this is wrong, needs to be in the global accel resolution
* thing, to properly consider i18n etc., but that probably requires
* AccelGroup changes etc.
*/
if (event->keyval == keyval && (mods & event->state) == mods)
{
gtk_menu_shell_cancel (menu_shell);
g_free (accel);
return TRUE;
}
}
g_free (accel);
switch (event->keyval)
{
case GDK_KEY_Delete:
case GDK_KEY_KP_Delete:
case GDK_KEY_BackSpace:
delete = TRUE;
break;
default:
break;
}
/* Figure out what modifiers went into determining the key symbol */
_gtk_translate_keyboard_accel_state (gdk_keymap_get_for_display (display),
event->hardware_keycode,
event->state,
gtk_accelerator_get_default_mod_mask (),
event->group,
&accel_key, NULL, NULL, &consumed_modifiers);
accel_key = gdk_keyval_to_lower (accel_key);
accel_mods = event->state & gtk_accelerator_get_default_mod_mask () & ~consumed_modifiers;
/* If lowercasing affects the keysym, then we need to include SHIFT
* in the modifiers, We re-upper case when we match against the
* keyval, but display and save in caseless form.
*/
if (accel_key != event->keyval)
accel_mods |= GDK_SHIFT_MASK;
/* Modify the accelerators */
if (can_change_accels &&
menu_shell->priv->active_menu_item &&
gtk_bin_get_child (GTK_BIN (menu_shell->priv->active_menu_item)) && /* no separators */
GTK_MENU_ITEM (menu_shell->priv->active_menu_item)->priv->submenu == NULL && /* no submenus */
(delete || gtk_accelerator_valid (accel_key, accel_mods)))
{
GtkWidget *menu_item = menu_shell->priv->active_menu_item;
gboolean locked, replace_accels = TRUE;
const gchar *path;
path = get_accel_path (menu_item, &locked);
if (!path || locked)
{
/* Can't change accelerators on menu_items without paths
* (basically, those items are accelerator-locked).
*/
gtk_widget_error_bell (widget);
}
else
{
gboolean changed;
/* For the keys that act to delete the current setting,
* we delete the current setting if there is one, otherwise,
* we set the key as the accelerator.
*/
if (delete)
{
GtkAccelKey key;
if (gtk_accel_map_lookup_entry (path, &key) &&
(key.accel_key || key.accel_mods))
{
accel_key = 0;
accel_mods = 0;
}
}
changed = gtk_accel_map_change_entry (path, accel_key, accel_mods, replace_accels);
if (!changed)
{
/* We failed, probably because this key is in use
* and locked already.
*/
gtk_widget_error_bell (widget);
}
}
}
return TRUE;
}
static gboolean
check_threshold (GtkWidget *widget,
gint start_x,
gint start_y,
gint x,
gint y)
{
#define THRESHOLD 8
return
ABS (start_x - x) > THRESHOLD ||
ABS (start_y - y) > THRESHOLD;
}
static gboolean
definitely_within_item (GtkWidget *widget,
gint x,
gint y)
{
GdkWindow *window = GTK_MENU_ITEM (widget)->priv->event_window;
int w, h;
w = gdk_window_get_width (window);
h = gdk_window_get_height (window);
return
check_threshold (widget, 0, 0, x, y) &&
check_threshold (widget, w - 1, 0, x, y) &&
check_threshold (widget, w - 1, h - 1, x, y) &&
check_threshold (widget, 0, h - 1, x, y);
}
static gboolean
gtk_menu_has_navigation_triangle (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
return priv->navigation_height && priv->navigation_width;
}
static gboolean
gtk_menu_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
GtkWidget *menu_item;
GtkMenu *menu;
GtkMenuShell *menu_shell;
GtkWidget *parent;
GdkDevice *source_device;
gboolean need_enter;
source_device = gdk_event_get_source_device ((GdkEvent *) event);
if (GTK_IS_MENU (widget) &&
gdk_device_get_source (source_device) != GDK_SOURCE_TOUCHSCREEN)
{
GtkMenuPrivate *priv = GTK_MENU(widget)->priv;
if (priv->ignore_button_release)
priv->ignore_button_release = FALSE;
gtk_menu_handle_scrolling (GTK_MENU (widget), event->x_root, event->y_root,
TRUE, TRUE);
}
/* We received the event for one of two reasons:
*
* a) We are the active menu, and did gtk_grab_add()
* b) The widget is a child of ours, and the event was propagated
*
* Since for computation of navigation regions, we want the menu which
* is the parent of the menu item, for a), we need to find that menu,
* which may be different from 'widget'.
*/
menu_item = gtk_get_event_widget ((GdkEvent*) event);
parent = gtk_widget_get_parent (menu_item);
if (!GTK_IS_MENU_ITEM (menu_item) ||
!GTK_IS_MENU (parent))
return FALSE;
menu_shell = GTK_MENU_SHELL (parent);
menu = GTK_MENU (menu_shell);
if (definitely_within_item (menu_item, event->x, event->y))
menu_shell->priv->activate_time = 0;
need_enter = (gtk_menu_has_navigation_triangle (menu) || menu_shell->priv->ignore_enter);
/* Check to see if we are within an active submenu's navigation region
*/
if (gtk_menu_navigating_submenu (menu, event->x_root, event->y_root))
return TRUE;
/* Make sure we pop down if we enter a non-selectable menu item, so we
* don't show a submenu when the cursor is outside the stay-up triangle.
*/
if (!_gtk_menu_item_is_selectable (menu_item))
{
/* We really want to deselect, but this gives the menushell code
* a chance to do some bookkeeping about the menuitem.
*/
gtk_menu_shell_select_item (menu_shell, menu_item);
return FALSE;
}
if (need_enter)
{
/* The menu is now sensitive to enter events on its items, but
* was previously sensitive. So we fake an enter event.
*/
menu_shell->priv->ignore_enter = FALSE;
if (event->x >= 0 && event->x < gdk_window_get_width (event->window) &&
event->y >= 0 && event->y < gdk_window_get_height (event->window))
{
GdkEvent *send_event = gdk_event_new (GDK_ENTER_NOTIFY);
gboolean result;
send_event->crossing.window = g_object_ref (event->window);
send_event->crossing.time = event->time;
send_event->crossing.send_event = TRUE;
send_event->crossing.x_root = event->x_root;
send_event->crossing.y_root = event->y_root;
send_event->crossing.x = event->x;
send_event->crossing.y = event->y;
send_event->crossing.state = event->state;
gdk_event_set_device (send_event, gdk_event_get_device ((GdkEvent *) event));
/* We send the event to 'widget', the currently active menu,
* instead of 'menu', the menu that the pointer is in. This
* will ensure that the event will be ignored unless the
* menuitem is a child of the active menu or some parent
* menu of the active menu.
*/
result = gtk_widget_event (widget, send_event);
gdk_event_free (send_event);
return result;
}
}
return FALSE;
}
static gboolean
get_double_arrows (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
gboolean double_arrows;
GtkArrowPlacement arrow_placement;
gtk_widget_style_get (GTK_WIDGET (menu),
"double-arrows", &double_arrows,
"arrow-placement", &arrow_placement,
NULL);
if (arrow_placement != GTK_ARROWS_BOTH)
return TRUE;
return double_arrows || (priv->initially_pushed_in &&
priv->scroll_offset != 0);
}
static void
gtk_menu_scroll_by (GtkMenu *menu,
gint step)
{
GtkMenuPrivate *priv = menu->priv;
GtkBorder arrow_border;
GtkWidget *widget;
gint offset;
gint view_height;
gboolean double_arrows;
widget = GTK_WIDGET (menu);
offset = priv->scroll_offset + step;
get_arrows_border (menu, &arrow_border);
double_arrows = get_double_arrows (menu);
/* If we scroll upward and the non-visible top part
* is smaller than the scroll arrow it would be
* pretty stupid to show the arrow and taking more
* screen space than just scrolling to the top.
*/
if (!double_arrows)
if ((step < 0) && (offset < arrow_border.top))
offset = 0;
/* Don't scroll over the top if we weren't before: */
if ((priv->scroll_offset >= 0) && (offset < 0))
offset = 0;
view_height = gdk_window_get_height (gtk_widget_get_window (widget));
if (priv->scroll_offset == 0 &&
view_height >= priv->requested_height)
return;
/* Don't scroll past the bottom if we weren't before: */
if (priv->scroll_offset > 0)
view_height -= arrow_border.top;
/* When both arrows are always shown,
* reduce view height even more.
*/
if (double_arrows)
view_height -= arrow_border.bottom;
if ((priv->scroll_offset + view_height <= priv->requested_height) &&
(offset + view_height > priv->requested_height))
offset = priv->requested_height - view_height;
if (offset != priv->scroll_offset)
gtk_menu_scroll_to (menu, offset);
}
static gboolean
gtk_menu_scroll_timeout (gpointer data)
{
GtkMenu *menu;
menu = GTK_MENU (data);
gtk_menu_scroll_by (menu, menu->priv->scroll_step);
return TRUE;
}
static gboolean
gtk_menu_scroll (GtkWidget *widget,
GdkEventScroll *event)
{
GtkMenu *menu = GTK_MENU (widget);
switch (event->direction)
{
case GDK_SCROLL_RIGHT:
case GDK_SCROLL_DOWN:
gtk_menu_scroll_by (menu, MENU_SCROLL_STEP2);
break;
case GDK_SCROLL_LEFT:
case GDK_SCROLL_UP:
gtk_menu_scroll_by (menu, - MENU_SCROLL_STEP2);
break;
case GDK_SCROLL_SMOOTH:
gtk_menu_scroll_by (menu, event->delta_y);
break;
}
return TRUE;
}
static void
get_arrows_sensitive_area (GtkMenu *menu,
GdkRectangle *upper,
GdkRectangle *lower)
{
GtkArrowPlacement arrow_placement;
GtkWidget *widget = GTK_WIDGET (menu);
GdkWindow *window;
gint width, height;
guint border;
guint vertical_padding;
gint win_x, win_y;
gint scroll_arrow_height;
GtkBorder padding;
window = gtk_widget_get_window (widget);
width = gdk_window_get_width (window);
height = gdk_window_get_height (window);
gtk_widget_style_get (widget,
"vertical-padding", &vertical_padding,
"scroll-arrow-vlength", &scroll_arrow_height,
"arrow-placement", &arrow_placement,
NULL);
border = gtk_container_get_border_width (GTK_CONTAINER (menu)) + vertical_padding;
get_menu_padding (widget, &padding);
gdk_window_get_position (window, &win_x, &win_y);
switch (arrow_placement)
{
case GTK_ARROWS_BOTH:
if (upper)
{
upper->x = win_x;
upper->y = win_y;
upper->width = width;
upper->height = scroll_arrow_height + border + padding.top;
}
if (lower)
{
lower->x = win_x;
lower->y = win_y + height - border - padding.bottom - scroll_arrow_height;
lower->width = width;
lower->height = scroll_arrow_height + border + padding.bottom;
}
break;
case GTK_ARROWS_START:
if (upper)
{
upper->x = win_x;
upper->y = win_y;
upper->width = width / 2;
upper->height = scroll_arrow_height + border + padding.top;
}
if (lower)
{
lower->x = win_x + width / 2;
lower->y = win_y;
lower->width = width / 2;
lower->height = scroll_arrow_height + border + padding.bottom;
}
break;
case GTK_ARROWS_END:
if (upper)
{
upper->x = win_x;
upper->y = win_y + height - border - scroll_arrow_height;
upper->width = width / 2;
upper->height = scroll_arrow_height + border + padding.top;
}
if (lower)
{
lower->x = win_x + width / 2;
lower->y = win_y + height - border - scroll_arrow_height;
lower->width = width / 2;
lower->height = scroll_arrow_height + border + padding.bottom;
}
break;
}
}
static void
gtk_menu_handle_scrolling (GtkMenu *menu,
gint x,
gint y,
gboolean enter,
gboolean motion)
{
GtkMenuPrivate *priv = menu->priv;
GtkMenuShell *menu_shell;
GdkRectangle rect;
gboolean in_arrow;
gboolean scroll_fast = FALSE;
gint top_x, top_y;
menu_shell = GTK_MENU_SHELL (menu);
gdk_window_get_position (gtk_widget_get_window (priv->toplevel),
&top_x, &top_y);
x -= top_x;
y -= top_y;
/* upper arrow handling */
get_arrows_sensitive_area (menu, &rect, NULL);
in_arrow = FALSE;
if (priv->upper_arrow_visible && !priv->tearoff_active &&
(x >= rect.x) && (x < rect.x + rect.width) &&
(y >= rect.y) && (y < rect.y + rect.height))
{
in_arrow = TRUE;
}
if ((priv->upper_arrow_state & GTK_STATE_FLAG_INSENSITIVE) == 0)
{
gboolean arrow_pressed = FALSE;
if (priv->upper_arrow_visible && !priv->tearoff_active)
{
scroll_fast = (y < rect.y + MENU_SCROLL_FAST_ZONE);
if (enter && in_arrow &&
(!priv->upper_arrow_prelight ||
priv->scroll_fast != scroll_fast))
{
priv->upper_arrow_prelight = TRUE;
priv->scroll_fast = scroll_fast;
/* Deselect the active item so that
* any submenus are popped down
*/
gtk_menu_shell_deselect (menu_shell);
gtk_menu_remove_scroll_timeout (menu);
priv->scroll_step = scroll_fast
? -MENU_SCROLL_STEP2
: -MENU_SCROLL_STEP1;
priv->scroll_timeout =
gdk_threads_add_timeout (scroll_fast
? MENU_SCROLL_TIMEOUT2
: MENU_SCROLL_TIMEOUT1,
gtk_menu_scroll_timeout, menu);
}
else if (!enter && !in_arrow && priv->upper_arrow_prelight)
{
gtk_menu_stop_scrolling (menu);
}
}
/* check if the button isn't insensitive before
* changing it to something else.
*/
if ((priv->upper_arrow_state & GTK_STATE_FLAG_INSENSITIVE) == 0)
{
GtkStateFlags arrow_state = 0;
if (arrow_pressed)
arrow_state |= GTK_STATE_FLAG_ACTIVE;
if (priv->upper_arrow_prelight)
arrow_state |= GTK_STATE_FLAG_PRELIGHT;
if (arrow_state != priv->upper_arrow_state)
{
priv->upper_arrow_state = arrow_state;
gdk_window_invalidate_rect (gtk_widget_get_window (GTK_WIDGET (menu)),
&rect, FALSE);
}
}
}
/* lower arrow handling */
get_arrows_sensitive_area (menu, NULL, &rect);
in_arrow = FALSE;
if (priv->lower_arrow_visible && !priv->tearoff_active &&
(x >= rect.x) && (x < rect.x + rect.width) &&
(y >= rect.y) && (y < rect.y + rect.height))
{
in_arrow = TRUE;
}
if ((priv->lower_arrow_state & GTK_STATE_FLAG_INSENSITIVE) == 0)
{
gboolean arrow_pressed = FALSE;
if (priv->lower_arrow_visible && !priv->tearoff_active)
{
scroll_fast = (y > rect.y + rect.height - MENU_SCROLL_FAST_ZONE);
if (enter && in_arrow &&
(!priv->lower_arrow_prelight ||
priv->scroll_fast != scroll_fast))
{
priv->lower_arrow_prelight = TRUE;
priv->scroll_fast = scroll_fast;
/* Deselect the active item so that
* any submenus are popped down
*/
gtk_menu_shell_deselect (menu_shell);
gtk_menu_remove_scroll_timeout (menu);
priv->scroll_step = scroll_fast
? MENU_SCROLL_STEP2
: MENU_SCROLL_STEP1;
priv->scroll_timeout =
gdk_threads_add_timeout (scroll_fast
? MENU_SCROLL_TIMEOUT2
: MENU_SCROLL_TIMEOUT1,
gtk_menu_scroll_timeout, menu);
}
else if (!enter && !in_arrow && priv->lower_arrow_prelight)
{
gtk_menu_stop_scrolling (menu);
}
}
/* check if the button isn't insensitive before
* changing it to something else.
*/
if ((priv->lower_arrow_state & GTK_STATE_FLAG_INSENSITIVE) == 0)
{
GtkStateFlags arrow_state = 0;
if (arrow_pressed)
arrow_state |= GTK_STATE_FLAG_ACTIVE;
if (priv->lower_arrow_prelight)
arrow_state |= GTK_STATE_FLAG_PRELIGHT;
if (arrow_state != priv->lower_arrow_state)
{
priv->lower_arrow_state = arrow_state;
gdk_window_invalidate_rect (gtk_widget_get_window (GTK_WIDGET (menu)),
&rect, FALSE);
}
}
}
}
static gboolean
gtk_menu_enter_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkWidget *menu_item;
GtkWidget *parent;
GdkDevice *source_device;
if (event->mode == GDK_CROSSING_GTK_GRAB ||
event->mode == GDK_CROSSING_GTK_UNGRAB ||
event->mode == GDK_CROSSING_STATE_CHANGED)
return TRUE;
source_device = gdk_event_get_source_device ((GdkEvent *) event);
menu_item = gtk_get_event_widget ((GdkEvent*) event);
if (GTK_IS_MENU (widget) &&
gdk_device_get_source (source_device) != GDK_SOURCE_TOUCHSCREEN)
{
GtkMenuShell *menu_shell = GTK_MENU_SHELL (widget);
if (!menu_shell->priv->ignore_enter)
gtk_menu_handle_scrolling (GTK_MENU (widget),
event->x_root, event->y_root, TRUE, TRUE);
}
if (gdk_device_get_source (source_device) != GDK_SOURCE_TOUCHSCREEN &&
GTK_IS_MENU_ITEM (menu_item))
{
GtkWidget *menu = gtk_widget_get_parent (menu_item);
if (GTK_IS_MENU (menu))
{
GtkMenuPrivate *priv = (GTK_MENU (menu))->priv;
GtkMenuShell *menu_shell = GTK_MENU_SHELL (menu);
if (priv->seen_item_enter)
{
/* This is the second enter we see for an item
* on this menu. This means a release should always
* mean activate.
*/
menu_shell->priv->activate_time = 0;
}
else if ((event->detail != GDK_NOTIFY_NONLINEAR &&
event->detail != GDK_NOTIFY_NONLINEAR_VIRTUAL))
{
if (definitely_within_item (menu_item, event->x, event->y))
{
/* This is an actual user-enter (ie. not a pop-under)
* In this case, the user must either have entered
* sufficiently far enough into the item, or he must move
* far enough away from the enter point. (see
* gtk_menu_motion_notify())
*/
menu_shell->priv->activate_time = 0;
}
}
priv->seen_item_enter = TRUE;
}
}
/* If this is a faked enter (see gtk_menu_motion_notify), 'widget'
* will not correspond to the event widget's parent. Check to see
* if we are in the parent's navigation region.
*/
parent = gtk_widget_get_parent (menu_item);
if (GTK_IS_MENU_ITEM (menu_item) && GTK_IS_MENU (parent) &&
gtk_menu_navigating_submenu (GTK_MENU (parent),
event->x_root, event->y_root))
return TRUE;
return GTK_WIDGET_CLASS (gtk_menu_parent_class)->enter_notify_event (widget, event);
}
static gboolean
gtk_menu_leave_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkMenuShell *menu_shell;
GtkMenu *menu;
GtkMenuItem *menu_item;
GtkWidget *event_widget;
GdkDevice *source_device;
if (event->mode == GDK_CROSSING_GTK_GRAB ||
event->mode == GDK_CROSSING_GTK_UNGRAB ||
event->mode == GDK_CROSSING_STATE_CHANGED)
return TRUE;
menu = GTK_MENU (widget);
menu_shell = GTK_MENU_SHELL (widget);
if (gtk_menu_navigating_submenu (menu, event->x_root, event->y_root))
return TRUE;
source_device = gdk_event_get_source_device ((GdkEvent *) event);
if (gdk_device_get_source (source_device) != GDK_SOURCE_TOUCHSCREEN)
gtk_menu_handle_scrolling (menu, event->x_root, event->y_root, FALSE, TRUE);
event_widget = gtk_get_event_widget ((GdkEvent*) event);
if (!GTK_IS_MENU_ITEM (event_widget))
return TRUE;
menu_item = GTK_MENU_ITEM (event_widget);
/* Here we check to see if we're leaving an active menu item
* with a submenu, in which case we enter submenu navigation mode.
*/
if (menu_shell->priv->active_menu_item != NULL
&& menu_item->priv->submenu != NULL
&& menu_item->priv->submenu_placement == GTK_LEFT_RIGHT)
{
if (GTK_MENU_SHELL (menu_item->priv->submenu)->priv->active)
{
gtk_menu_set_submenu_navigation_region (menu, menu_item, event);
return TRUE;
}
else if (menu_item == GTK_MENU_ITEM (menu_shell->priv->active_menu_item))
{
/* We are leaving an active menu item with nonactive submenu.
* Deselect it so we don't surprise the user with by popping
* up a submenu _after_ he left the item.
*/
gtk_menu_shell_deselect (menu_shell);
return TRUE;
}
}
return GTK_WIDGET_CLASS (gtk_menu_parent_class)->leave_notify_event (widget, event);
}
static gboolean
pointer_on_menu_widget (GtkMenu *menu,
gdouble x_root,
gdouble y_root)
{
GtkMenuPrivate *priv = menu->priv;
GtkAllocation allocation;
gint window_x, window_y;
gtk_widget_get_allocation (GTK_WIDGET (menu), &allocation);
gdk_window_get_position (gtk_widget_get_window (priv->toplevel),
&window_x, &window_y);
if (x_root >= window_x && x_root < window_x + allocation.width &&
y_root >= window_y && y_root < window_y + allocation.height)
return TRUE;
return FALSE;
}
static gboolean
gtk_menu_captured_event (GtkWidget *widget,
GdkEvent *event)
{
GdkDevice *source_device;
gboolean retval = FALSE;
GtkMenuPrivate *priv;
GtkMenu *menu;
gdouble x_root, y_root;
guint button;
GdkModifierType state;
menu = GTK_MENU (widget);
priv = menu->priv;
if (!priv->upper_arrow_visible && !priv->lower_arrow_visible && priv->drag_start_y < 0)
return retval;
source_device = gdk_event_get_source_device (event);
gdk_event_get_root_coords (event, &x_root, &y_root);
switch (event->type)
{
case GDK_TOUCH_BEGIN:
case GDK_BUTTON_PRESS:
if ((!gdk_event_get_button (event, &button) || button == 1) &&
gdk_device_get_source (source_device) == GDK_SOURCE_TOUCHSCREEN &&
pointer_on_menu_widget (menu, x_root, y_root))
{
priv->drag_start_y = event->button.y_root;
priv->initial_drag_offset = priv->scroll_offset;
priv->drag_scroll_started = FALSE;
}
else
priv->drag_start_y = -1;
priv->drag_already_pressed = TRUE;
break;
case GDK_TOUCH_END:
case GDK_BUTTON_RELEASE:
if (priv->drag_scroll_started)
{
priv->drag_scroll_started = FALSE;
priv->drag_start_y = -1;
priv->drag_already_pressed = FALSE;
retval = TRUE;
}
break;
case GDK_TOUCH_UPDATE:
case GDK_MOTION_NOTIFY:
if ((!gdk_event_get_state (event, &state) || (state & GDK_BUTTON1_MASK) != 0) &&
gdk_device_get_source (source_device) == GDK_SOURCE_TOUCHSCREEN)
{
if (!priv->drag_already_pressed)
{
if (pointer_on_menu_widget (menu, x_root, y_root))
{
priv->drag_start_y = y_root;
priv->initial_drag_offset = priv->scroll_offset;
priv->drag_scroll_started = FALSE;
}
else
priv->drag_start_y = -1;
priv->drag_already_pressed = TRUE;
}
if (priv->drag_start_y < 0 && !priv->drag_scroll_started)
break;
if (priv->drag_scroll_started)
{
gint offset, view_height;
GtkBorder arrow_border;
gdouble y_diff;
y_diff = y_root - priv->drag_start_y;
offset = priv->initial_drag_offset - y_diff;
view_height = gdk_window_get_height (gtk_widget_get_window (widget));
get_arrows_border (menu, &arrow_border);
if (priv->upper_arrow_visible)
view_height -= arrow_border.top;
if (priv->lower_arrow_visible)
view_height -= arrow_border.bottom;
offset = CLAMP (offset,
MIN (priv->scroll_offset, 0),
MAX (priv->scroll_offset, priv->requested_height - view_height));
gtk_menu_scroll_to (menu, offset);
retval = TRUE;
}
else if (gtk_drag_check_threshold (widget,
0, priv->drag_start_y,
0, y_root))
{
priv->drag_scroll_started = TRUE;
gtk_menu_shell_deselect (GTK_MENU_SHELL (menu));
retval = TRUE;
}
}
break;
case GDK_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
if (priv->drag_scroll_started)
retval = TRUE;
break;
default:
break;
}
return retval;
}
static void
gtk_menu_stop_navigating_submenu (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
priv->navigation_x = 0;
priv->navigation_y = 0;
priv->navigation_width = 0;
priv->navigation_height = 0;
if (priv->navigation_timeout)
{
g_source_remove (priv->navigation_timeout);
priv->navigation_timeout = 0;
}
}
/* When the timeout is elapsed, the navigation region is destroyed
* and the menuitem under the pointer (if any) is selected.
*/
static gboolean
gtk_menu_stop_navigating_submenu_cb (gpointer user_data)
{
GtkMenuPopdownData *popdown_data = user_data;
GtkMenu *menu = popdown_data->menu;
GtkMenuPrivate *priv = menu->priv;
GdkWindow *child_window;
gtk_menu_stop_navigating_submenu (menu);
if (gtk_widget_get_realized (GTK_WIDGET (menu)))
{
child_window = gdk_window_get_device_position (priv->bin_window,
popdown_data->device,
NULL, NULL, NULL);
if (child_window)
{
GdkEvent *send_event = gdk_event_new (GDK_ENTER_NOTIFY);
send_event->crossing.window = g_object_ref (child_window);
send_event->crossing.time = GDK_CURRENT_TIME; /* Bogus */
send_event->crossing.send_event = TRUE;
gdk_event_set_device (send_event, popdown_data->device);
GTK_WIDGET_CLASS (gtk_menu_parent_class)->enter_notify_event (GTK_WIDGET (menu), (GdkEventCrossing *)send_event);
gdk_event_free (send_event);
}
}
return FALSE;
}
static gboolean
gtk_menu_navigating_submenu (GtkMenu *menu,
gint event_x,
gint event_y)
{
GtkMenuPrivate *priv = menu->priv;
gint width, height;
if (!gtk_menu_has_navigation_triangle (menu))
return FALSE;
width = priv->navigation_width;
height = priv->navigation_height;
/* Check if x/y are in the triangle spanned by the navigation parameters */
/* 1) Move the coordinates so the triangle starts at 0,0 */
event_x -= priv->navigation_x;
event_y -= priv->navigation_y;
/* 2) Ensure both legs move along the positive axis */
if (width < 0)
{
event_x = -event_x;
width = -width;
}
if (height < 0)
{
event_y = -event_y;
height = -height;
}
/* 3) Check that the given coordinate is inside the triangle. The formula
* is a transformed form of this formula: x/w + y/h <= 1
*/
if (event_x >= 0 && event_y >= 0 &&
event_x * height + event_y * width <= width * height)
{
return TRUE;
}
else
{
gtk_menu_stop_navigating_submenu (menu);
return FALSE;
}
}
static void
gtk_menu_set_submenu_navigation_region (GtkMenu *menu,
GtkMenuItem *menu_item,
GdkEventCrossing *event)
{
GtkMenuPrivate *priv = menu->priv;
gint submenu_left = 0;
gint submenu_right = 0;
gint submenu_top = 0;
gint submenu_bottom = 0;
gint width = 0;
GtkWidget *event_widget;
GtkMenuPopdownData *popdown_data;
GdkWindow *window;
g_return_if_fail (menu_item->priv->submenu != NULL);
g_return_if_fail (event != NULL);
event_widget = gtk_get_event_widget ((GdkEvent*) event);
window = gtk_widget_get_window (menu_item->priv->submenu);
gdk_window_get_origin (window, &submenu_left, &submenu_top);
submenu_right = submenu_left + gdk_window_get_width (window);
submenu_bottom = submenu_top + gdk_window_get_height (window);
width = gdk_window_get_width (gtk_widget_get_window (event_widget));
if (event->x >= 0 && event->x < width)
{
gint popdown_delay;
gtk_menu_stop_navigating_submenu (menu);
/* The navigation region is the triangle closest to the x/y
* location of the rectangle. This is why the width or height
* can be negative.
*/
if (menu_item->priv->submenu_direction == GTK_DIRECTION_RIGHT)
{
/* right */
priv->navigation_x = submenu_left;
priv->navigation_width = event->x_root - submenu_left;
}
else
{
/* left */
priv->navigation_x = submenu_right;
priv->navigation_width = event->x_root - submenu_right;
}
if (event->y < 0)
{
/* top */
priv->navigation_y = event->y_root;
priv->navigation_height = submenu_top - event->y_root - NAVIGATION_REGION_OVERSHOOT;
if (priv->navigation_height >= 0)
return;
}
else
{
/* bottom */
priv->navigation_y = event->y_root;
priv->navigation_height = submenu_bottom - event->y_root + NAVIGATION_REGION_OVERSHOOT;
if (priv->navigation_height <= 0)
return;
}
g_object_get (gtk_widget_get_settings (GTK_WIDGET (menu)),
"gtk-menu-popdown-delay", &popdown_delay,
NULL);
popdown_data = g_new (GtkMenuPopdownData, 1);
popdown_data->menu = menu;
popdown_data->device = gdk_event_get_device ((GdkEvent *) event);
priv->navigation_timeout = gdk_threads_add_timeout_full (G_PRIORITY_DEFAULT,
popdown_delay,
gtk_menu_stop_navigating_submenu_cb,
popdown_data,
(GDestroyNotify) g_free);
}
}
static void
gtk_menu_deactivate (GtkMenuShell *menu_shell)
{
GtkWidget *parent;
g_return_if_fail (GTK_IS_MENU (menu_shell));
parent = menu_shell->priv->parent_menu_shell;
menu_shell->priv->activate_time = 0;
gtk_menu_popdown (GTK_MENU (menu_shell));
if (parent)
gtk_menu_shell_deactivate (GTK_MENU_SHELL (parent));
}
static void
gtk_menu_position (GtkMenu *menu,
gboolean set_scroll_offset)
{
GtkMenuPrivate *priv = menu->priv;
GtkWidget *widget;
GtkRequisition requisition;
gint x, y;
gint scroll_offset;
GdkScreen *screen;
GdkScreen *pointer_screen;
GdkRectangle monitor;
GdkDevice *pointer;
widget = GTK_WIDGET (menu);
screen = gtk_widget_get_screen (widget);
pointer = _gtk_menu_shell_get_grab_device (GTK_MENU_SHELL (menu));
gdk_device_get_position (pointer, &pointer_screen, &x, &y);
/* Realize so we have the proper width and heigh to figure out
* the right place to popup the menu.
*/
gtk_widget_realize (priv->toplevel);
requisition.width = gtk_widget_get_allocated_width (widget);
requisition.height = gtk_widget_get_allocated_height (widget);
if (pointer_screen != screen)
{
/* Pointer is on a different screen; roughly center the
* menu on the screen. If someone was using multiscreen
* + Xinerama together they'd probably want something
* fancier; but that is likely to be vanishingly rare.
*/
x = MAX (0, (gdk_screen_get_width (screen) - requisition.width) / 2);
y = MAX (0, (gdk_screen_get_height (screen) - requisition.height) / 2);
}
priv->monitor_num = gdk_screen_get_monitor_at_point (screen, x, y);
priv->initially_pushed_in = FALSE;
/* Set the type hint here to allow custom position functions
* to set a different hint
*/
if (!gtk_widget_get_visible (priv->toplevel))
gtk_window_set_type_hint (GTK_WINDOW (priv->toplevel), GDK_WINDOW_TYPE_HINT_POPUP_MENU);
if (priv->position_func)
{
(* priv->position_func) (menu, &x, &y, &priv->initially_pushed_in,
priv->position_func_data);
if (priv->monitor_num < 0)
priv->monitor_num = gdk_screen_get_monitor_at_point (screen, x, y);
gdk_screen_get_monitor_workarea (screen, priv->monitor_num, &monitor);
}
else
{
gint space_left, space_right, space_above, space_below;
gint needed_width;
gint needed_height;
GtkBorder padding;
gboolean rtl = (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL);
get_menu_padding (widget, &padding);
/* The placement of popup menus horizontally works like this (with
* RTL in parentheses)
*
* - If there is enough room to the right (left) of the mouse cursor,
* position the menu there.
*
* - Otherwise, if if there is enough room to the left (right) of the
* mouse cursor, position the menu there.
*
* - Otherwise if the menu is smaller than the monitor, position it
* on the side of the mouse cursor that has the most space available
*
* - Otherwise (if there is simply not enough room for the menu on the
* monitor), position it as far left (right) as possible.
*
* Positioning in the vertical direction is similar: first try below
* mouse cursor, then above.
*/
gdk_screen_get_monitor_workarea (screen, priv->monitor_num, &monitor);
space_left = x - monitor.x;
space_right = monitor.x + monitor.width - x - 1;
space_above = y - monitor.y;
space_below = monitor.y + monitor.height - y - 1;
/* Position horizontally. */
/* the amount of space we need to position the menu.
* Note the menu is offset "thickness" pixels
*/
needed_width = requisition.width - padding.left;
if (needed_width <= space_left ||
needed_width <= space_right)
{
if ((rtl && needed_width <= space_left) ||
(!rtl && needed_width > space_right))
{
/* position left */
x = x + padding.left - requisition.width + 1;
}
else
{
/* position right */
x = x - padding.right;
}
/* x is clamped on-screen further down */
}
else if (requisition.width <= monitor.width)
{
/* the menu is too big to fit on either side of the mouse
* cursor, but smaller than the monitor. Position it on
* the side that has the most space
*/
if (space_left > space_right)
{
/* left justify */
x = monitor.x;
}
else
{
/* right justify */
x = monitor.x + monitor.width - requisition.width;
}
}
else /* menu is simply too big for the monitor */
{
if (rtl)
{
/* right justify */
x = monitor.x + monitor.width - requisition.width;
}
else
{
/* left justify */
x = monitor.x;
}
}
/* Position vertically.
* The algorithm is the same as above, but simpler
* because we don't have to take RTL into account.
*/
needed_height = requisition.height - padding.top;
if (needed_height <= space_above ||
needed_height <= space_below)
{
if (needed_height <= space_below)
y = y - padding.top;
else
y = y + padding.bottom - requisition.height + 1;
y = CLAMP (y, monitor.y,
monitor.y + monitor.height - requisition.height);
}
else if (needed_height > space_below && needed_height > space_above)
{
if (space_below >= space_above)
y = monitor.y + monitor.height - requisition.height;
else
y = monitor.y;
}
else
{
y = monitor.y;
}
}
scroll_offset = 0;
if (y + requisition.height > monitor.y + monitor.height)
{
if (priv->initially_pushed_in)
scroll_offset += (monitor.y + monitor.height) - requisition.height - y;
y = (monitor.y + monitor.height) - requisition.height;
}
if (y < monitor.y)
{
if (priv->initially_pushed_in)
scroll_offset += monitor.y - y;
y = monitor.y;
}
x = CLAMP (x, monitor.x, MAX (monitor.x, monitor.x + monitor.width - requisition.width));
if (GTK_MENU_SHELL (menu)->priv->active)
{
priv->have_position = TRUE;
priv->position_x = x;
priv->position_y = y;
}
if (scroll_offset != 0)
{
GtkBorder arrow_border;
get_arrows_border (menu, &arrow_border);
scroll_offset += arrow_border.top;
}
gtk_window_move (GTK_WINDOW (GTK_MENU_SHELL (menu)->priv->active ? priv->toplevel : priv->tearoff_window),
x, y);
if (!GTK_MENU_SHELL (menu)->priv->active)
{
gtk_window_resize (GTK_WINDOW (priv->tearoff_window),
requisition.width, requisition.height);
}
if (set_scroll_offset)
priv->scroll_offset = scroll_offset;
}
static void
gtk_menu_remove_scroll_timeout (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
if (priv->scroll_timeout)
{
g_source_remove (priv->scroll_timeout);
priv->scroll_timeout = 0;
}
}
static void
gtk_menu_stop_scrolling (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
gtk_menu_remove_scroll_timeout (menu);
priv->upper_arrow_prelight = FALSE;
priv->lower_arrow_prelight = FALSE;
}
static void
gtk_menu_scroll_to (GtkMenu *menu,
gint offset)
{
GtkMenuPrivate *priv = menu->priv;
GtkBorder arrow_border, padding;
GtkWidget *widget;
gint x, y;
gint view_width, view_height;
gint border_width;
gint menu_height;
guint vertical_padding;
guint horizontal_padding;
gboolean double_arrows;
widget = GTK_WIDGET (menu);
if (priv->tearoff_active && priv->tearoff_adjustment)
gtk_adjustment_set_value (priv->tearoff_adjustment, offset);
/* Move/resize the viewport according to arrows: */
view_width = gtk_widget_get_allocated_width (widget);
view_height = gtk_widget_get_allocated_height (widget);
gtk_widget_style_get (GTK_WIDGET (menu),
"vertical-padding", &vertical_padding,
"horizontal-padding", &horizontal_padding,
NULL);
get_menu_padding (widget, &padding);
double_arrows = get_double_arrows (menu);
border_width = gtk_container_get_border_width (GTK_CONTAINER (menu));
view_width -= (2 * (border_width + horizontal_padding)) + padding.left + padding.right;
view_height -= (2 * (border_width + vertical_padding)) + padding.top + padding.bottom;
menu_height = priv->requested_height - (2 * (border_width + vertical_padding)) -
padding.top - padding.bottom;
x = border_width + padding.left + horizontal_padding;
y = border_width + padding.top + vertical_padding;
if (double_arrows && !priv->tearoff_active)
{
if (view_height < menu_height ||
(offset > 0 && priv->scroll_offset > 0) ||
(offset < 0 && priv->scroll_offset < 0))
{
GtkStateFlags upper_arrow_previous_state = priv->upper_arrow_state;
GtkStateFlags lower_arrow_previous_state = priv->lower_arrow_state;
if (!priv->upper_arrow_visible || !priv->lower_arrow_visible)
gtk_widget_queue_draw (GTK_WIDGET (menu));
priv->upper_arrow_visible = priv->lower_arrow_visible = TRUE;
get_arrows_border (menu, &arrow_border);
y += arrow_border.top;
view_height -= arrow_border.top;
view_height -= arrow_border.bottom;
if (offset <= 0)
priv->upper_arrow_state |= GTK_STATE_FLAG_INSENSITIVE;
else
{
priv->upper_arrow_state &= ~(GTK_STATE_FLAG_INSENSITIVE);
if (priv->upper_arrow_prelight)
priv->upper_arrow_state |= GTK_STATE_FLAG_PRELIGHT;
else
priv->upper_arrow_state &= ~(GTK_STATE_FLAG_PRELIGHT);
}
if (offset >= menu_height - view_height)
priv->lower_arrow_state |= GTK_STATE_FLAG_INSENSITIVE;
else
{
priv->lower_arrow_state &= ~(GTK_STATE_FLAG_INSENSITIVE);
if (priv->lower_arrow_prelight)
priv->lower_arrow_state |= GTK_STATE_FLAG_PRELIGHT;
else
priv->lower_arrow_state &= ~(GTK_STATE_FLAG_PRELIGHT);
}
if ((priv->upper_arrow_state != upper_arrow_previous_state) ||
(priv->lower_arrow_state != lower_arrow_previous_state))
gtk_widget_queue_draw (GTK_WIDGET (menu));
if ((upper_arrow_previous_state & GTK_STATE_FLAG_INSENSITIVE) == 0 &&
(priv->upper_arrow_state & GTK_STATE_FLAG_INSENSITIVE) != 0)
{
/* At the upper border, possibly remove timeout */
if (priv->scroll_step < 0)
{
gtk_menu_stop_scrolling (menu);
gtk_widget_queue_draw (GTK_WIDGET (menu));
}
}
if ((lower_arrow_previous_state & GTK_STATE_FLAG_INSENSITIVE) == 0 &&
(priv->lower_arrow_state & GTK_STATE_FLAG_INSENSITIVE) != 0)
{
/* At the lower border, possibly remove timeout */
if (priv->scroll_step > 0)
{
gtk_menu_stop_scrolling (menu);
gtk_widget_queue_draw (GTK_WIDGET (menu));
}
}
}
else if (priv->upper_arrow_visible || priv->lower_arrow_visible)
{
offset = 0;
priv->upper_arrow_visible = priv->lower_arrow_visible = FALSE;
priv->upper_arrow_prelight = priv->lower_arrow_prelight = FALSE;
gtk_menu_stop_scrolling (menu);
gtk_widget_queue_draw (GTK_WIDGET (menu));
}
}
else if (!priv->tearoff_active)
{
gboolean last_visible;
last_visible = priv->upper_arrow_visible;
priv->upper_arrow_visible = offset > 0;
/* upper_arrow_visible may have changed, so requery the border */
get_arrows_border (menu, &arrow_border);
view_height -= arrow_border.top;
if ((last_visible != priv->upper_arrow_visible) &&
!priv->upper_arrow_visible)
{
priv->upper_arrow_prelight = FALSE;
/* If we hide the upper arrow, possibly remove timeout */
if (priv->scroll_step < 0)
{
gtk_menu_stop_scrolling (menu);
gtk_widget_queue_draw (GTK_WIDGET (menu));
}
}
last_visible = priv->lower_arrow_visible;
priv->lower_arrow_visible = offset < menu_height - view_height;
/* lower_arrow_visible may have changed, so requery the border */
get_arrows_border (menu, &arrow_border);
view_height -= arrow_border.bottom;
if ((last_visible != priv->lower_arrow_visible) &&
!priv->lower_arrow_visible)
{
priv->lower_arrow_prelight = FALSE;
/* If we hide the lower arrow, possibly remove timeout */
if (priv->scroll_step > 0)
{
gtk_menu_stop_scrolling (menu);
gtk_widget_queue_draw (GTK_WIDGET (menu));
}
}
y += arrow_border.top;
}
/* Scroll the menu: */
if (gtk_widget_get_realized (widget))
{
gdk_window_move (priv->bin_window, 0, -offset);
gdk_window_move_resize (priv->view_window, x, y, view_width, view_height);
}
priv->scroll_offset = offset;
}
static gboolean
compute_child_offset (GtkMenu *menu,
GtkWidget *menu_item,
gint *offset,
gint *height,
gboolean *is_last_child)
{
GtkMenuPrivate *priv = menu->priv;
gint item_top_attach;
gint item_bottom_attach;
gint child_offset = 0;
gint i;
get_effective_child_attach (menu_item, NULL, NULL,
&item_top_attach, &item_bottom_attach);
/* there is a possibility that we get called before _size_request,
* so check the height table for safety.
*/
if (!priv->heights || priv->heights_length < gtk_menu_get_n_rows (menu))
return FALSE;
/* when we have a row with only invisible children, its height will
* be zero, so there's no need to check WIDGET_VISIBLE here
*/
for (i = 0; i < item_top_attach; i++)
child_offset += priv->heights[i];
if (is_last_child)
*is_last_child = (item_bottom_attach == gtk_menu_get_n_rows (menu));
if (offset)
*offset = child_offset;
if (height)
*height = priv->heights[item_top_attach];
return TRUE;
}
static void
gtk_menu_scroll_item_visible (GtkMenuShell *menu_shell,
GtkWidget *menu_item)
{
GtkMenu *menu = GTK_MENU (menu_shell);
GtkMenuPrivate *priv = menu->priv;
GtkWidget *widget = GTK_WIDGET (menu_shell);
gint child_offset, child_height;
gint height;
gint y;
gint arrow_height;
gboolean last_child = 0;
/* We need to check if the selected item fully visible.
* If not we need to scroll the menu so that it becomes fully
* visible.
*/
if (compute_child_offset (menu, menu_item,
&child_offset, &child_height, &last_child))
{
guint vertical_padding;
gboolean double_arrows;
GtkBorder padding;
y = priv->scroll_offset;
height = gdk_window_get_height (gtk_widget_get_window (widget));
gtk_widget_style_get (widget,
"vertical-padding", &vertical_padding,
NULL);
double_arrows = get_double_arrows (menu);
get_menu_padding (widget, &padding);
height -= 2 * gtk_container_get_border_width (GTK_CONTAINER (menu)) +
padding.top + padding.bottom +
2 * vertical_padding;
if (child_offset < y)
{
/* Ignore the enter event we might get if the pointer
* is on the menu
*/
menu_shell->priv->ignore_enter = TRUE;
gtk_menu_scroll_to (menu, child_offset);
}
else
{
GtkBorder arrow_border;
arrow_height = 0;
get_arrows_border (menu, &arrow_border);
if (!priv->tearoff_active)
arrow_height = arrow_border.top + arrow_border.bottom;
if (child_offset + child_height > y + height - arrow_height)
{
arrow_height = 0;
if ((!last_child && !priv->tearoff_active) || double_arrows)
arrow_height += arrow_border.bottom;
y = child_offset + child_height - height + arrow_height;
if (((y > 0) && !priv->tearoff_active) || double_arrows)
{
/* Need upper arrow */
arrow_height += arrow_border.top;
y = child_offset + child_height - height + arrow_height;
}
/* Ignore the enter event we might get if the pointer
* is on the menu
*/
menu_shell->priv->ignore_enter = TRUE;
gtk_menu_scroll_to (menu, y);
}
}
}
}
static void
gtk_menu_select_item (GtkMenuShell *menu_shell,
GtkWidget *menu_item)
{
GtkMenu *menu = GTK_MENU (menu_shell);
if (gtk_widget_get_realized (GTK_WIDGET (menu)))
gtk_menu_scroll_item_visible (menu_shell, menu_item);
GTK_MENU_SHELL_CLASS (gtk_menu_parent_class)->select_item (menu_shell, menu_item);
}
/* Reparent the menu, taking care of the refcounting
*
* If unrealize is true we force a unrealize while reparenting the parent.
* This can help eliminate flicker in some cases.
*
* What happens is that when the menu is unrealized and then re-realized,
* the allocations are as follows:
*
* parent - 1x1 at (0,0)
* child1 - 100x20 at (0,0)
* child2 - 100x20 at (0,20)
* child3 - 100x20 at (0,40)
*
* That is, the parent is small but the children are full sized. Then,
* when the queued_resize gets processed, the parent gets resized to
* full size.
*
* But in order to eliminate flicker when scrolling, gdkgeometry-x11.c
* contains the following logic:
*
* - if a move or resize operation on a window would change the clip
* region on the children, then before the window is resized
* the background for children is temporarily set to None, the
* move/resize done, and the background for the children restored.
*
* So, at the point where the parent is resized to final size, the
* background for the children is temporarily None, and thus they
* are not cleared to the background color and the previous background
* (the image of the menu) is left in place.
*/
static void
gtk_menu_reparent (GtkMenu *menu,
GtkWidget *new_parent,
gboolean unrealize)
{
GObject *object = G_OBJECT (menu);
GtkWidget *widget = GTK_WIDGET (menu);
gboolean was_floating = g_object_is_floating (object);
g_object_ref_sink (object);
if (unrealize)
{
g_object_ref (object);
gtk_container_remove (GTK_CONTAINER (gtk_widget_get_parent (widget)), widget);
gtk_container_add (GTK_CONTAINER (new_parent), widget);
g_object_unref (object);
}
else
gtk_widget_reparent (widget, new_parent);
if (was_floating)
g_object_force_floating (object);
else
g_object_unref (object);
}
static void
gtk_menu_show_all (GtkWidget *widget)
{
/* Show children, but not self. */
gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) gtk_widget_show_all, NULL);
}
/**
* gtk_menu_set_screen:
* @menu: a #GtkMenu
* @screen: (allow-none): a #GdkScreen, or %NULL if the screen should be
* determined by the widget the menu is attached to
*
* Sets the #GdkScreen on which the menu will be displayed.
*
* Since: 2.2
*/
void
gtk_menu_set_screen (GtkMenu *menu,
GdkScreen *screen)
{
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (screen == NULL || GDK_IS_SCREEN (screen));
g_object_set_data (G_OBJECT (menu), I_("gtk-menu-explicit-screen"), screen);
if (screen)
{
menu_change_screen (menu, screen);
}
else
{
GtkWidget *attach_widget = gtk_menu_get_attach_widget (menu);
if (attach_widget)
attach_widget_screen_changed (attach_widget, NULL, menu);
}
}
/**
* gtk_menu_attach:
* @menu: a #GtkMenu
* @child: a #GtkMenuItem
* @left_attach: The column number to attach the left side of the item to
* @right_attach: The column number to attach the right side of the item to
* @top_attach: The row number to attach the top of the item to
* @bottom_attach: The row number to attach the bottom of the item to
*
* Adds a new #GtkMenuItem to a (table) menu. The number of 'cells' that
* an item will occupy is specified by @left_attach, @right_attach,
* @top_attach and @bottom_attach. These each represent the leftmost,
* rightmost, uppermost and lower column and row numbers of the table.
* (Columns and rows are indexed from zero).
*
* Note that this function is not related to gtk_menu_detach().
*
* Since: 2.4
*/
void
gtk_menu_attach (GtkMenu *menu,
GtkWidget *child,
guint left_attach,
guint right_attach,
guint top_attach,
guint bottom_attach)
{
GtkMenuShell *menu_shell;
GtkWidget *parent;
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (GTK_IS_MENU_ITEM (child));
parent = gtk_widget_get_parent (child);
g_return_if_fail (parent == NULL || parent == GTK_WIDGET (menu));
g_return_if_fail (left_attach < right_attach);
g_return_if_fail (top_attach < bottom_attach);
menu_shell = GTK_MENU_SHELL (menu);
if (!parent)
{
AttachInfo *ai = get_attach_info (child);
ai->left_attach = left_attach;
ai->right_attach = right_attach;
ai->top_attach = top_attach;
ai->bottom_attach = bottom_attach;
menu_shell->priv->children = g_list_append (menu_shell->priv->children, child);
gtk_widget_set_parent (child, GTK_WIDGET (menu));
menu_queue_resize (menu);
}
else
{
gtk_container_child_set (GTK_CONTAINER (parent), child,
"left-attach", left_attach,
"right-attach", right_attach,
"top-attach", top_attach,
"bottom-attach", bottom_attach,
NULL);
}
}
static gint
gtk_menu_get_popup_delay (GtkMenuShell *menu_shell)
{
gint popup_delay;
g_object_get (gtk_widget_get_settings (GTK_WIDGET (menu_shell)),
"gtk-menu-popup-delay", &popup_delay,
NULL);
return popup_delay;
}
static GtkWidget *
find_child_containing (GtkMenuShell *menu_shell,
int left,
int right,
int top,
int bottom)
{
GList *list;
/* find a child which includes the area given by
* left, right, top, bottom.
*/
for (list = menu_shell->priv->children; list; list = list->next)
{
gint l, r, t, b;
if (!_gtk_menu_item_is_selectable (list->data))
continue;
get_effective_child_attach (list->data, &l, &r, &t, &b);
if (l <= left && right <= r && t <= top && bottom <= b)
return GTK_WIDGET (list->data);
}
return NULL;
}
static void
gtk_menu_move_current (GtkMenuShell *menu_shell,
GtkMenuDirectionType direction)
{
GtkMenu *menu = GTK_MENU (menu_shell);
gint i;
gint l, r, t, b;
GtkWidget *match = NULL;
if (gtk_widget_get_direction (GTK_WIDGET (menu_shell)) == GTK_TEXT_DIR_RTL)
{
switch (direction)
{
case GTK_MENU_DIR_CHILD:
direction = GTK_MENU_DIR_PARENT;
break;
case GTK_MENU_DIR_PARENT:
direction = GTK_MENU_DIR_CHILD;
break;
default: ;
}
}
/* use special table menu key bindings */
if (menu_shell->priv->active_menu_item && gtk_menu_get_n_columns (menu) > 1)
{
get_effective_child_attach (menu_shell->priv->active_menu_item, &l, &r, &t, &b);
if (direction == GTK_MENU_DIR_NEXT)
{
for (i = b; i < gtk_menu_get_n_rows (menu); i++)
{
match = find_child_containing (menu_shell, l, l + 1, i, i + 1);
if (match)
break;
}
if (!match)
{
/* wrap around */
for (i = 0; i < t; i++)
{
match = find_child_containing (menu_shell,
l, l + 1, i, i + 1);
if (match)
break;
}
}
}
else if (direction == GTK_MENU_DIR_PREV)
{
for (i = t; i > 0; i--)
{
match = find_child_containing (menu_shell,
l, l + 1, i - 1, i);
if (match)
break;
}
if (!match)
{
/* wrap around */
for (i = gtk_menu_get_n_rows (menu); i > b; i--)
{
match = find_child_containing (menu_shell,
l, l + 1, i - 1, i);
if (match)
break;
}
}
}
else if (direction == GTK_MENU_DIR_PARENT)
{
/* we go one left if possible */
if (l > 0)
match = find_child_containing (menu_shell,
l - 1, l, t, t + 1);
if (!match)
{
GtkWidget *parent = menu_shell->priv->parent_menu_shell;
if (!parent
|| g_list_length (GTK_MENU_SHELL (parent)->priv->children) <= 1)
match = menu_shell->priv->active_menu_item;
}
}
else if (direction == GTK_MENU_DIR_CHILD)
{
/* we go one right if possible */
if (r < gtk_menu_get_n_columns (menu))
match = find_child_containing (menu_shell, r, r + 1, t, t + 1);
if (!match)
{
GtkWidget *parent = menu_shell->priv->parent_menu_shell;
if (! GTK_MENU_ITEM (menu_shell->priv->active_menu_item)->priv->submenu &&
(!parent ||
g_list_length (GTK_MENU_SHELL (parent)->priv->children) <= 1))
match = menu_shell->priv->active_menu_item;
}
}
if (match)
{
gtk_menu_shell_select_item (menu_shell, match);
return;
}
}
GTK_MENU_SHELL_CLASS (gtk_menu_parent_class)->move_current (menu_shell, direction);
}
static gint
get_visible_size (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
GtkAllocation allocation;
GtkWidget *widget = GTK_WIDGET (menu);
GtkContainer *container = GTK_CONTAINER (menu);
GtkBorder padding;
gint menu_height;
gtk_widget_get_allocation (widget, &allocation);
get_menu_padding (widget, &padding);
menu_height = (allocation.height -
(2 * gtk_container_get_border_width (container)) -
padding.top - padding.bottom);
if (!priv->tearoff_active)
{
GtkBorder arrow_border;
get_arrows_border (menu, &arrow_border);
menu_height -= arrow_border.top;
menu_height -= arrow_border.bottom;
}
return menu_height;
}
/* Find the sensitive on-screen child containing @y, or if none,
* the nearest selectable onscreen child. (%NULL if none)
*/
static GtkWidget *
child_at (GtkMenu *menu,
gint y)
{
GtkMenuPrivate *priv = menu->priv;
GtkMenuShell *menu_shell = GTK_MENU_SHELL (menu);
GtkWidget *child = NULL;
gint child_offset = 0;
GList *children;
gint menu_height;
gint lower, upper; /* Onscreen bounds */
menu_height = get_visible_size (menu);
lower = priv->scroll_offset;
upper = priv->scroll_offset + menu_height;
for (children = menu_shell->priv->children; children; children = children->next)
{
if (gtk_widget_get_visible (children->data))
{
GtkRequisition child_requisition;
gtk_widget_get_preferred_size (children->data,
&child_requisition, NULL);
if (_gtk_menu_item_is_selectable (children->data) &&
child_offset >= lower &&
child_offset + child_requisition.height <= upper)
{
child = children->data;
if (child_offset + child_requisition.height > y &&
!GTK_IS_TEAROFF_MENU_ITEM (child))
return child;
}
child_offset += child_requisition.height;
}
}
return child;
}
static gint
get_menu_height (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
GtkWidget *widget = GTK_WIDGET (menu);
GtkBorder padding;
gint height;
get_menu_padding (widget, &padding);
height = priv->requested_height;
height -= (gtk_container_get_border_width (GTK_CONTAINER (widget)) * 2) +
padding.top + padding.bottom;
if (!priv->tearoff_active)
{
GtkBorder arrow_border;
get_arrows_border (menu, &arrow_border);
height -= arrow_border.top;
height -= arrow_border.bottom;
}
return height;
}
static void
gtk_menu_real_move_scroll (GtkMenu *menu,
GtkScrollType type)
{
GtkMenuPrivate *priv = menu->priv;
gint page_size = get_visible_size (menu);
gint end_position = get_menu_height (menu);
GtkMenuShell *menu_shell = GTK_MENU_SHELL (menu);
switch (type)
{
case GTK_SCROLL_PAGE_UP:
case GTK_SCROLL_PAGE_DOWN:
{
gint old_offset;
gint new_offset;
gint child_offset = 0;
gboolean old_upper_arrow_visible;
gint step;
if (type == GTK_SCROLL_PAGE_UP)
step = - page_size;
else
step = page_size;
if (menu_shell->priv->active_menu_item)
{
gint child_height;
compute_child_offset (menu, menu_shell->priv->active_menu_item,
&child_offset, &child_height, NULL);
child_offset += child_height / 2;
}
menu_shell->priv->ignore_enter = TRUE;
old_upper_arrow_visible = priv->upper_arrow_visible && !priv->tearoff_active;
old_offset = priv->scroll_offset;
new_offset = priv->scroll_offset + step;
new_offset = CLAMP (new_offset, 0, end_position - page_size);
gtk_menu_scroll_to (menu, new_offset);
if (menu_shell->priv->active_menu_item)
{
GtkWidget *new_child;
gboolean new_upper_arrow_visible = priv->upper_arrow_visible && !priv->tearoff_active;
GtkBorder arrow_border;
get_arrows_border (menu, &arrow_border);
if (priv->scroll_offset != old_offset)
step = priv->scroll_offset - old_offset;
step -= (new_upper_arrow_visible - old_upper_arrow_visible) * arrow_border.top;
new_child = child_at (menu, child_offset + step);
if (new_child)
gtk_menu_shell_select_item (menu_shell, new_child);
}
}
break;
case GTK_SCROLL_START:
/* Ignore the enter event we might get if the pointer is on the menu */
menu_shell->priv->ignore_enter = TRUE;
gtk_menu_shell_select_first (menu_shell, TRUE);
break;
case GTK_SCROLL_END:
/* Ignore the enter event we might get if the pointer is on the menu */
menu_shell->priv->ignore_enter = TRUE;
_gtk_menu_shell_select_last (menu_shell, TRUE);
break;
default:
break;
}
}
/**
* gtk_menu_set_monitor:
* @menu: a #GtkMenu
* @monitor_num: the number of the monitor on which the menu should
* be popped up
*
* Informs GTK+ on which monitor a menu should be popped up.
* See gdk_screen_get_monitor_geometry().
*
* This function should be called from a #GtkMenuPositionFunc
* if the menu should not appear on the same monitor as the pointer.
* This information can't be reliably inferred from the coordinates
* returned by a #GtkMenuPositionFunc, since, for very long menus,
* these coordinates may extend beyond the monitor boundaries or even
* the screen boundaries.
*
* Since: 2.4
*/
void
gtk_menu_set_monitor (GtkMenu *menu,
gint monitor_num)
{
GtkMenuPrivate *priv = menu->priv;
g_return_if_fail (GTK_IS_MENU (menu));
priv->monitor_num = monitor_num;
}
/**
* gtk_menu_get_monitor:
* @menu: a #GtkMenu
*
* Retrieves the number of the monitor on which to show the menu.
*
* Returns: the number of the monitor on which the menu should
* be popped up or -1, if no monitor has been set
*
* Since: 2.14
*/
gint
gtk_menu_get_monitor (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), -1);
return menu->priv->monitor_num;
}
/**
* gtk_menu_get_for_attach_widget:
* @widget: a #GtkWidget
*
* Returns a list of the menus which are attached to this widget.
* This list is owned by GTK+ and must not be modified.
*
* Return value: (element-type GtkWidget) (transfer none): the list
* of menus attached to his widget.
*
* Since: 2.6
*/
GList*
gtk_menu_get_for_attach_widget (GtkWidget *widget)
{
GList *list;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
list = g_object_get_data (G_OBJECT (widget), ATTACHED_MENUS);
return list;
}
static void
gtk_menu_grab_notify (GtkWidget *widget,
gboolean was_grabbed)
{
GtkMenu *menu;
GtkWidget *toplevel;
GtkWindowGroup *group;
GtkWidget *grab;
GdkDevice *pointer;
menu = GTK_MENU (widget);
pointer = _gtk_menu_shell_get_grab_device (GTK_MENU_SHELL (widget));
if (!pointer ||
!gtk_widget_device_is_shadowed (widget, pointer))
return;
toplevel = gtk_widget_get_toplevel (widget);
if (!GTK_IS_WINDOW (toplevel))
return;
group = gtk_window_get_group (GTK_WINDOW (toplevel));
grab = gtk_window_group_get_current_device_grab (group, pointer);
if (GTK_MENU_SHELL (widget)->priv->active && !GTK_IS_MENU_SHELL (grab))
gtk_menu_shell_cancel (GTK_MENU_SHELL (widget));
menu->priv->drag_scroll_started = FALSE;
}
/**
* gtk_menu_set_reserve_toggle_size:
* @menu: a #GtkMenu
* @reserve_toggle_size: whether to reserve size for toggles
*
* Sets whether the menu should reserve space for drawing toggles
* or icons, regardless of their actual presence.
*
* Since: 2.18
*/
void
gtk_menu_set_reserve_toggle_size (GtkMenu *menu,
gboolean reserve_toggle_size)
{
GtkMenuPrivate *priv = menu->priv;
gboolean no_toggle_size;
g_return_if_fail (GTK_IS_MENU (menu));
no_toggle_size = !reserve_toggle_size;
if (priv->no_toggle_size != no_toggle_size)
{
priv->no_toggle_size = no_toggle_size;
g_object_notify (G_OBJECT (menu), "reserve-toggle-size");
}
}
/**
* gtk_menu_get_reserve_toggle_size:
* @menu: a #GtkMenu
*
* Returns whether the menu reserves space for toggles and
* icons, regardless of their actual presence.
*
* Returns: Whether the menu reserves toggle space
*
* Since: 2.18
*/
gboolean
gtk_menu_get_reserve_toggle_size (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), FALSE);
return !menu->priv->no_toggle_size;
}
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