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gtk: Add utils imported from chrome.

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Cheng Zhao 2014-02-14 13:59:41 +00:00
parent 426e7645bc
commit 6bd56f2a52
7 changed files with 842 additions and 5 deletions
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150
browser/ui/gtk/gtk_custom_menu.cc Normal file
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "browser/ui/gtk/gtk_custom_menu.h"
#include "browser/ui/gtk/gtk_custom_menu_item.h"
G_DEFINE_TYPE(GtkCustomMenu, gtk_custom_menu, GTK_TYPE_MENU)
// Stolen directly from gtkmenushell.c. I'd love to call the library version
// instead, but it's static and isn't exported. :(
static gint gtk_menu_shell_is_item(GtkMenuShell* menu_shell,
GtkWidget* child) {
GtkWidget *parent;
g_return_val_if_fail(GTK_IS_MENU_SHELL(menu_shell), FALSE);
g_return_val_if_fail(child != NULL, FALSE);
parent = gtk_widget_get_parent(child);
while (GTK_IS_MENU_SHELL(parent)) {
if (parent == reinterpret_cast<GtkWidget*>(menu_shell))
return TRUE;
parent = GTK_MENU_SHELL(parent)->parent_menu_shell;
}
return FALSE;
}
// Stolen directly from gtkmenushell.c. I'd love to call the library version
// instead, but it's static and isn't exported. :(
static GtkWidget* gtk_menu_shell_get_item(GtkMenuShell* menu_shell,
GdkEvent* event) {
GtkWidget* menu_item = gtk_get_event_widget(event);
while (menu_item && !GTK_IS_MENU_ITEM(menu_item))
menu_item = gtk_widget_get_parent(menu_item);
if (menu_item && gtk_menu_shell_is_item(menu_shell, menu_item))
return menu_item;
else
return NULL;
}
// When processing a button event, abort processing if the cursor isn't in a
// clickable region.
static gboolean gtk_custom_menu_button_press(GtkWidget* widget,
GdkEventButton* event) {
GtkWidget* menu_item = gtk_menu_shell_get_item(
GTK_MENU_SHELL(widget), reinterpret_cast<GdkEvent*>(event));
if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
if (!gtk_custom_menu_item_is_in_clickable_region(
GTK_CUSTOM_MENU_ITEM(menu_item))) {
return TRUE;
}
}
return GTK_WIDGET_CLASS(gtk_custom_menu_parent_class)->
button_press_event(widget, event);
}
// When processing a button event, abort processing if the cursor isn't in a
// clickable region. If it's in a button that doesn't dismiss the menu, fire
// that event and abort having the normal GtkMenu code run.
static gboolean gtk_custom_menu_button_release(GtkWidget* widget,
GdkEventButton* event) {
GtkWidget* menu_item = gtk_menu_shell_get_item(
GTK_MENU_SHELL(widget), reinterpret_cast<GdkEvent*>(event));
if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
if (!gtk_custom_menu_item_is_in_clickable_region(
GTK_CUSTOM_MENU_ITEM(menu_item))) {
// Stop processing this event. This isn't a clickable region.
return TRUE;
}
if (gtk_custom_menu_item_try_no_dismiss_command(
GTK_CUSTOM_MENU_ITEM(menu_item))) {
return TRUE;
}
}
return GTK_WIDGET_CLASS(gtk_custom_menu_parent_class)->
button_release_event(widget, event);
}
// Manually forward button press events to the menu item (and then do what we'd
// do normally).
static gboolean gtk_custom_menu_motion_notify(GtkWidget* widget,
GdkEventMotion* event) {
GtkWidget* menu_item = gtk_menu_shell_get_item(
GTK_MENU_SHELL(widget), (GdkEvent*)event);
if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
gtk_custom_menu_item_receive_motion_event(GTK_CUSTOM_MENU_ITEM(menu_item),
event->x, event->y);
}
return GTK_WIDGET_CLASS(gtk_custom_menu_parent_class)->
motion_notify_event(widget, event);
}
static void gtk_custom_menu_move_current(GtkMenuShell* menu_shell,
GtkMenuDirectionType direction) {
// If the currently selected item is custom, we give it first chance to catch
// up/down events.
// TODO(erg): We are breaking a GSEAL by directly accessing this. We'll need
// to fix this by the time gtk3 comes out.
GtkWidget* menu_item = GTK_MENU_SHELL(menu_shell)->active_menu_item;
if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
switch (direction) {
case GTK_MENU_DIR_PREV:
case GTK_MENU_DIR_NEXT:
if (gtk_custom_menu_item_handle_move(GTK_CUSTOM_MENU_ITEM(menu_item),
direction))
return;
break;
default:
break;
}
}
GTK_MENU_SHELL_CLASS(gtk_custom_menu_parent_class)->
move_current(menu_shell, direction);
// In the case of hitting PREV and transitioning to a custom menu, we want to
// make sure we're selecting the final item in the list, not the first one.
menu_item = GTK_MENU_SHELL(menu_shell)->active_menu_item;
if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
gtk_custom_menu_item_select_item_by_direction(
GTK_CUSTOM_MENU_ITEM(menu_item), direction);
}
}
static void gtk_custom_menu_init(GtkCustomMenu* menu) {
}
static void gtk_custom_menu_class_init(GtkCustomMenuClass* klass) {
GtkWidgetClass* widget_class = GTK_WIDGET_CLASS(klass);
GtkMenuShellClass* menu_shell_class = GTK_MENU_SHELL_CLASS(klass);
widget_class->button_press_event = gtk_custom_menu_button_press;
widget_class->button_release_event = gtk_custom_menu_button_release;
widget_class->motion_notify_event = gtk_custom_menu_motion_notify;
menu_shell_class->move_current = gtk_custom_menu_move_current;
}
GtkWidget* gtk_custom_menu_new() {
return GTK_WIDGET(g_object_new(GTK_TYPE_CUSTOM_MENU, NULL));
}