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gtk2/gtk/gtkmenu.c
Matthias Clasen 1398f8ea4c Add some missing deprecation annotations 
These were reported missing in bug
https://bugzilla.gnome.org/show_bug.cgi?id=705672
2013-08-13 18:09:47 -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 MENU_POPUP_DELAY 225
#define MENU_POPDOWN_DELAY 1000
#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_WITH_PRIVATE (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));
/**
* GtkMenu:tearoff-title:
*
* A title that may be displayed by the window manager when this
* menu is torn-off.
*
* Deprecated: 3.10
**/
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 | G_PARAM_DEPRECATED));
/**
* GtkMenu:tearoff-state:
*
* A boolean that indicates whether the menu is torn-off.
*
* Since: 2.6
*
* Deprecated: 3.10
**/
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 | G_PARAM_DEPRECATED));
/**
* 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));
/**
* 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));
/**
* GtkMenu:horizontal-padding:
*
* Extra space at the left and right edges of the menu.
*
* Deprecated: 3.8: use the standard padding CSS property (through objects
* like #GtkStyleContext and #GtkCssProvider); the value of this style
* property is ignored.
*/
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 |
G_PARAM_DEPRECATED));
/**
* GtkMenu:vertical-padding:
*
* Extra space at the top and bottom of the menu.
*
* Deprecated: 3.8: use the standard padding CSS property (through objects
* like #GtkStyleContext and #GtkCssProvider); the value of this style
* property is ignored.
*/
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 |
G_PARAM_DEPRECATED));
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);
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 = gtk_menu_get_instance_private (menu);
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.
*
* If the menu is attached to the widget then it will be destroyed
* when the widget is destroyed, as if it was a child widget.
* An attached menu will also move between screens correctly if the
* widgets moves between screens.
*/
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);
/* 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);
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.
*
* Deprecated: 3.10
*/
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.
*
* Deprecated: 3.10
*/
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.
*
* Deprecated: 3.10
*/
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.
*
* Deprecated: 3.10
**/
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;
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);
gtk_widget_register_window (widget, window);
get_menu_padding (widget, &padding);
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
context = gtk_widget_get_style_context (widget);
gtk_widget_get_allocation (widget, &allocation);
attributes.x = border_width + padding.left;
attributes.y = border_width + padding.top;
attributes.width = allocation.width -
(2 * border_width) - padding.left - padding.right;
attributes.height = allocation.height -
(2 * border_width) - 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);
gtk_widget_register_window (widget, priv->view_window);
gtk_widget_get_allocation (widget, &allocation);
attributes.x = 0;
attributes.y = - priv->scroll_offset;
attributes.width = allocation.width + (2 * border_width) +
padding.left + padding.right;
attributes.height = priv->requested_height - (2 * border_width) +
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);
gtk_widget_register_window (widget, priv->bin_window);
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);
gtk_widget_register_window (GTK_WIDGET (menu), window);
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)
{
gtk_widget_unregister_window (GTK_WIDGET (menu), window);
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);
gtk_widget_unregister_window (widget, priv->view_window);
gdk_window_destroy (priv->view_window);
priv->view_window = NULL;
gtk_widget_unregister_window (widget, priv->bin_window);
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 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;
get_menu_padding (widget, &padding);
border_width = gtk_container_get_border_width (GTK_CONTAINER (menu));
avail_width -= (border_width) * 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;
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);
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) + padding.top + padding.bottom;
for (i = 0; i < priv->heights_length; i++)
priv->requested_height += priv->heights[i];
x = border_width + padding.left;
y = border_width + padding.top;
width = allocation->width - (2 * border_width) -
padding.left - padding.right;
height = allocation->height - (2 * border_width) -
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;
gint scroll_arrow_height;
GtkBorder menu_padding;
gtk_widget_style_get (widget,
"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;
border->y = border_width + menu_padding.top;
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 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);
get_menu_padding (widget, &padding);
border_width = gtk_container_get_border_width (GTK_CONTAINER (menu));
min_width += (2 * border_width) + padding.left + padding.right;
nat_width += (2 * border_width) + 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 border_width;
gint n_heights, i;
gint min_height, nat_height;
border_width = gtk_container_get_border_width (GTK_CONTAINER (menu));
get_menu_padding (widget, &padding);
min_height = nat_height = (2 * border_width) + 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 gboolean
gtk_menu_key_press (GtkWidget *widget,
GdkEventKey *event)
{
GtkMenu *menu;
g_return_val_if_fail (GTK_IS_MENU (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
menu = GTK_MENU (widget);
gtk_menu_stop_navigating_submenu (menu);
return GTK_WIDGET_CLASS (gtk_menu_parent_class)->key_press_event (widget, event);
}
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;
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,
"scroll-arrow-vlength", &scroll_arrow_height,
"arrow-placement", &arrow_placement,
NULL);
border = gtk_container_get_border_width (GTK_CONTAINER (menu));
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)
{
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;
}
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,
MENU_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;
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);
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) + padding.left + padding.right;
view_height -= (2 * border_width) + padding.top + padding.bottom;
menu_height = priv->requested_height - (2 * border_width) - padding.top - padding.bottom;
x = border_width + padding.left;
y = border_width + padding.top;
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))
{
gboolean double_arrows;
GtkBorder padding;
y = priv->scroll_offset;
height = gdk_window_get_height (gtk_widget_get_window (widget));
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;
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)
{
return MENU_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;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (child_offset + child_requisition.height > y &&
!GTK_IS_TEAROFF_MENU_ITEM (child))
return child;
G_GNUC_END_IGNORE_DEPRECATIONS
}
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;
}
/**
* gtk_menu_new_from_model:
* @model: a #GMenuModel
*
* Creates a #GtkMenu and populates it with menu items and
* submenus according to @model.
*
* The created menu items are connected to actions found in the
* #GtkApplicationWindow to which the menu belongs - typically
* by means of being attached to a widget (see gtk_menu_attach_to_widget())
* that is contained within the #GtkApplicationWindows widget hierarchy.
*
* Returns: a new #GtkMenu
*
* Since: 3.4
*/
GtkWidget *
gtk_menu_new_from_model (GMenuModel *model)
{
GtkWidget *menu;
g_return_val_if_fail (G_IS_MENU_MODEL (model), NULL);
menu = gtk_menu_new ();
gtk_menu_shell_bind_model (GTK_MENU_SHELL (menu), model, NULL, TRUE);
return menu;
}
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