1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "chrome/browser/ui/gtk/gtk_custom_menu.h"
6
7 #include "chrome/browser/ui/gtk/gtk_custom_menu_item.h"
8
G_DEFINE_TYPE(GtkCustomMenu,gtk_custom_menu,GTK_TYPE_MENU)9 G_DEFINE_TYPE(GtkCustomMenu, gtk_custom_menu, GTK_TYPE_MENU)
10
11 // Stolen directly from gtkmenushell.c. I'd love to call the library version
12 // instead, but it's static and isn't exported. :(
13 static gint gtk_menu_shell_is_item(GtkMenuShell* menu_shell,
14 GtkWidget* child) {
15 GtkWidget *parent;
16
17 g_return_val_if_fail(GTK_IS_MENU_SHELL(menu_shell), FALSE);
18 g_return_val_if_fail(child != NULL, FALSE);
19
20 parent = child->parent;
21 while (GTK_IS_MENU_SHELL(parent)) {
22 if (parent == reinterpret_cast<GtkWidget*>(menu_shell))
23 return TRUE;
24 parent = GTK_MENU_SHELL(parent)->parent_menu_shell;
25 }
26
27 return FALSE;
28 }
29
30 // Stolen directly from gtkmenushell.c. I'd love to call the library version
31 // instead, but it's static and isn't exported. :(
gtk_menu_shell_get_item(GtkMenuShell * menu_shell,GdkEvent * event)32 static GtkWidget* gtk_menu_shell_get_item(GtkMenuShell* menu_shell,
33 GdkEvent* event) {
34 GtkWidget* menu_item = gtk_get_event_widget(event);
35
36 while (menu_item && !GTK_IS_MENU_ITEM(menu_item))
37 menu_item = menu_item->parent;
38
39 if (menu_item && gtk_menu_shell_is_item(menu_shell, menu_item))
40 return menu_item;
41 else
42 return NULL;
43 }
44
45 // When processing a button event, abort processing if the cursor isn't in a
46 // clickable region.
gtk_custom_menu_button_press(GtkWidget * widget,GdkEventButton * event)47 static gboolean gtk_custom_menu_button_press(GtkWidget* widget,
48 GdkEventButton* event) {
49 GtkWidget* menu_item = gtk_menu_shell_get_item(
50 GTK_MENU_SHELL(widget), reinterpret_cast<GdkEvent*>(event));
51 if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
52 if (!gtk_custom_menu_item_is_in_clickable_region(
53 GTK_CUSTOM_MENU_ITEM(menu_item))) {
54 return TRUE;
55 }
56 }
57
58 return GTK_WIDGET_CLASS(gtk_custom_menu_parent_class)->
59 button_press_event(widget, event);
60 }
61
62 // When processing a button event, abort processing if the cursor isn't in a
63 // clickable region. If it's in a button that doesn't dismiss the menu, fire
64 // that event and abort having the normal GtkMenu code run.
gtk_custom_menu_button_release(GtkWidget * widget,GdkEventButton * event)65 static gboolean gtk_custom_menu_button_release(GtkWidget* widget,
66 GdkEventButton* event) {
67 GtkWidget* menu_item = gtk_menu_shell_get_item(
68 GTK_MENU_SHELL(widget), reinterpret_cast<GdkEvent*>(event));
69 if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
70 if (!gtk_custom_menu_item_is_in_clickable_region(
71 GTK_CUSTOM_MENU_ITEM(menu_item))) {
72 // Stop processing this event. This isn't a clickable region.
73 return TRUE;
74 }
75
76 if (gtk_custom_menu_item_try_no_dismiss_command(
77 GTK_CUSTOM_MENU_ITEM(menu_item))) {
78 return TRUE;
79 }
80 }
81
82 return GTK_WIDGET_CLASS(gtk_custom_menu_parent_class)->
83 button_release_event(widget, event);
84 }
85
86 // Manually forward button press events to the menu item (and then do what we'd
87 // do normally).
gtk_custom_menu_motion_notify(GtkWidget * widget,GdkEventMotion * event)88 static gboolean gtk_custom_menu_motion_notify(GtkWidget* widget,
89 GdkEventMotion* event) {
90 GtkWidget* menu_item = gtk_menu_shell_get_item(
91 GTK_MENU_SHELL(widget), (GdkEvent*)event);
92 if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
93 gtk_custom_menu_item_receive_motion_event(GTK_CUSTOM_MENU_ITEM(menu_item),
94 event->x, event->y);
95 }
96
97 return GTK_WIDGET_CLASS(gtk_custom_menu_parent_class)->
98 motion_notify_event(widget, event);
99 }
100
gtk_custom_menu_move_current(GtkMenuShell * menu_shell,GtkMenuDirectionType direction)101 static void gtk_custom_menu_move_current(GtkMenuShell* menu_shell,
102 GtkMenuDirectionType direction) {
103 // If the currently selected item is custom, we give it first chance to catch
104 // up/down events.
105
106 // TODO(erg): We are breaking a GSEAL by directly accessing this. We'll need
107 // to fix this by the time gtk3 comes out.
108 GtkWidget* menu_item = GTK_MENU_SHELL(menu_shell)->active_menu_item;
109 if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
110 switch (direction) {
111 case GTK_MENU_DIR_PREV:
112 case GTK_MENU_DIR_NEXT:
113 if (gtk_custom_menu_item_handle_move(GTK_CUSTOM_MENU_ITEM(menu_item),
114 direction))
115 return;
116 break;
117 default:
118 break;
119 }
120 }
121
122 GTK_MENU_SHELL_CLASS(gtk_custom_menu_parent_class)->
123 move_current(menu_shell, direction);
124
125 // In the case of hitting PREV and transitioning to a custom menu, we want to
126 // make sure we're selecting the final item in the list, not the first one.
127 menu_item = GTK_MENU_SHELL(menu_shell)->active_menu_item;
128 if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
129 gtk_custom_menu_item_select_item_by_direction(
130 GTK_CUSTOM_MENU_ITEM(menu_item), direction);
131 }
132 }
133
gtk_custom_menu_init(GtkCustomMenu * menu)134 static void gtk_custom_menu_init(GtkCustomMenu* menu) {
135 }
136
gtk_custom_menu_class_init(GtkCustomMenuClass * klass)137 static void gtk_custom_menu_class_init(GtkCustomMenuClass* klass) {
138 GtkWidgetClass* widget_class = GTK_WIDGET_CLASS(klass);
139 GtkMenuShellClass* menu_shell_class = GTK_MENU_SHELL_CLASS(klass);
140
141 widget_class->button_press_event = gtk_custom_menu_button_press;
142 widget_class->button_release_event = gtk_custom_menu_button_release;
143 widget_class->motion_notify_event = gtk_custom_menu_motion_notify;
144
145 menu_shell_class->move_current = gtk_custom_menu_move_current;
146 }
147
gtk_custom_menu_new()148 GtkWidget* gtk_custom_menu_new() {
149 return GTK_WIDGET(g_object_new(GTK_TYPE_CUSTOM_MENU, NULL));
150 }
151