1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
19 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
20 * file for a list of people on the GTK+ Team. See the ChangeLog
21 * files for a list of changes. These files are distributed with
22 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
27 #include "gtkmenuprivate.h"
28 #include "gtkmenuitemprivate.h"
29 #include "gtktearoffmenuitem.h"
34 * SECTION:gtktearoffmenuitem
35 * @Short_description: A menu item used to tear off and reattach its menu
36 * @Title: GtkTearoffMenuItem
39 * A #GtkTearoffMenuItem is a special #GtkMenuItem which is used to
40 * tear off and reattach its menu.
42 * When its menu is shown normally, the #GtkTearoffMenuItem is drawn as a
43 * dotted line indicating that the menu can be torn off. Activating it
44 * causes its menu to be torn off and displayed in its own window
47 * When its menu is shown as a tearoff menu, the #GtkTearoffMenuItem is drawn
48 * as a dotted line which has a left pointing arrow graphic indicating that
49 * the tearoff menu can be reattached. Activating it will erase the tearoff
52 * <note>#GtkTearoffMenuItem is deprecated and should not be used in newly
53 * written code. Menus are not meant to be torn around.</note>
59 #define BORDER_SPACING 3
61 struct _GtkTearoffMenuItemPrivate
66 static void gtk_tearoff_menu_item_get_preferred_width (GtkWidget *widget,
69 static void gtk_tearoff_menu_item_get_preferred_height (GtkWidget *widget,
72 static gboolean gtk_tearoff_menu_item_draw (GtkWidget *widget,
74 static void gtk_tearoff_menu_item_activate (GtkMenuItem *menu_item);
75 static void gtk_tearoff_menu_item_parent_set (GtkWidget *widget,
78 G_DEFINE_TYPE (GtkTearoffMenuItem, gtk_tearoff_menu_item, GTK_TYPE_MENU_ITEM)
81 * gtk_tearoff_menu_item_new:
83 * Creates a new #GtkTearoffMenuItem.
85 * Returns: a new #GtkTearoffMenuItem.
87 * Deprecated: 3.4: #GtkTearoffMenuItem is deprecated and should not be
88 * used in newly written code.
91 gtk_tearoff_menu_item_new (void)
93 return g_object_new (GTK_TYPE_TEAROFF_MENU_ITEM, NULL);
97 gtk_tearoff_menu_item_class_init (GtkTearoffMenuItemClass *klass)
99 GtkWidgetClass *widget_class;
100 GtkMenuItemClass *menu_item_class;
102 widget_class = (GtkWidgetClass*) klass;
103 menu_item_class = (GtkMenuItemClass*) klass;
105 widget_class->draw = gtk_tearoff_menu_item_draw;
106 widget_class->get_preferred_width = gtk_tearoff_menu_item_get_preferred_width;
107 widget_class->get_preferred_height = gtk_tearoff_menu_item_get_preferred_height;
108 widget_class->parent_set = gtk_tearoff_menu_item_parent_set;
110 gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_TEAR_OFF_MENU_ITEM);
112 menu_item_class->activate = gtk_tearoff_menu_item_activate;
114 g_type_class_add_private (klass, sizeof (GtkTearoffMenuItemPrivate));
118 gtk_tearoff_menu_item_init (GtkTearoffMenuItem *tearoff_menu_item)
120 GtkTearoffMenuItemPrivate *priv;
122 tearoff_menu_item->priv = G_TYPE_INSTANCE_GET_PRIVATE (tearoff_menu_item,
123 GTK_TYPE_TEAROFF_MENU_ITEM,
124 GtkTearoffMenuItemPrivate);
125 priv = tearoff_menu_item->priv;
127 priv->torn_off = FALSE;
131 gtk_tearoff_menu_item_get_preferred_width (GtkWidget *widget,
135 GtkStyleContext *context;
140 context = gtk_widget_get_style_context (widget);
141 state = gtk_widget_get_state_flags (widget);
143 gtk_style_context_get_padding (context, state, &padding);
144 border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
146 *minimum = *natural = (border_width + BORDER_SPACING) * 2 + padding.left + padding.right;
150 gtk_tearoff_menu_item_get_preferred_height (GtkWidget *widget,
154 GtkStyleContext *context;
160 context = gtk_widget_get_style_context (widget);
161 state = gtk_widget_get_state_flags (widget);
163 gtk_style_context_get_padding (context, state, &padding);
164 border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
166 *minimum = *natural = (border_width * 2) + padding.top + padding.bottom;
168 parent = gtk_widget_get_parent (widget);
169 if (GTK_IS_MENU (parent) && GTK_MENU (parent)->priv->torn_off)
171 *minimum += ARROW_SIZE;
172 *natural += ARROW_SIZE;
176 *minimum += padding.top + 4;
177 *natural += padding.top + 4;
182 gtk_tearoff_menu_item_draw (GtkWidget *widget,
185 GtkMenuItem *menu_item;
187 GtkStyleContext *context;
189 gint x, y, width, height;
192 GtkTextDirection direction;
196 menu_item = GTK_MENU_ITEM (widget);
197 context = gtk_widget_get_style_context (widget);
198 direction = gtk_widget_get_direction (widget);
199 state = gtk_widget_get_state_flags (widget);
201 border_width = gtk_container_get_border_width (GTK_CONTAINER (menu_item));
204 width = gtk_widget_get_allocated_width (widget) - border_width * 2;
205 height = gtk_widget_get_allocated_height (widget) - border_width * 2;
206 right_max = x + width;
208 gtk_style_context_save (context);
209 gtk_style_context_set_state (context, state);
210 gtk_style_context_get_padding (context, state, &padding);
212 if (state & GTK_STATE_FLAG_PRELIGHT)
214 gtk_render_background (context, cr, x, y, width, height);
215 gtk_render_frame (context, cr, x, y, width, height);
218 parent = gtk_widget_get_parent (widget);
219 if (GTK_IS_MENU (parent) && GTK_MENU (parent)->priv->torn_off)
223 if (menu_item->priv->toggle_size > ARROW_SIZE)
225 if (direction == GTK_TEXT_DIR_LTR)
227 arrow_x = x + (menu_item->priv->toggle_size - ARROW_SIZE)/2;
228 angle = (3 * G_PI) / 2;
232 arrow_x = x + width - menu_item->priv->toggle_size + (menu_item->priv->toggle_size - ARROW_SIZE)/2;
235 x += menu_item->priv->toggle_size + BORDER_SPACING;
239 if (direction == GTK_TEXT_DIR_LTR)
241 arrow_x = ARROW_SIZE / 2;
242 angle = (3 * G_PI) / 2;
246 arrow_x = x + width - 2 * ARROW_SIZE + ARROW_SIZE / 2;
252 gtk_render_arrow (context, cr, angle,
253 arrow_x, height / 2 - 5,
257 while (x < right_max)
261 if (direction == GTK_TEXT_DIR_LTR)
264 x2 = MIN (x + TEAR_LENGTH, right_max);
269 x2 = MAX (right_max - x - TEAR_LENGTH, 0);
272 gtk_render_line (context, cr,
273 x1, y + (height - padding.bottom) / 2,
274 x2, y + (height - padding.bottom) / 2);
275 x += 2 * TEAR_LENGTH;
278 gtk_style_context_restore (context);
284 gtk_tearoff_menu_item_activate (GtkMenuItem *menu_item)
288 parent = gtk_widget_get_parent (GTK_WIDGET (menu_item));
289 if (GTK_IS_MENU (parent))
291 GtkMenu *menu = GTK_MENU (parent);
293 gtk_widget_queue_resize (GTK_WIDGET (menu_item));
294 gtk_menu_set_tearoff_state (GTK_MENU (parent),
295 !menu->priv->torn_off);
300 tearoff_state_changed (GtkMenu *menu,
304 GtkTearoffMenuItem *tearoff_menu_item = GTK_TEAROFF_MENU_ITEM (data);
305 GtkTearoffMenuItemPrivate *priv = tearoff_menu_item->priv;
307 priv->torn_off = gtk_menu_get_tearoff_state (menu);
311 gtk_tearoff_menu_item_parent_set (GtkWidget *widget,
314 GtkTearoffMenuItem *tearoff_menu_item = GTK_TEAROFF_MENU_ITEM (widget);
315 GtkTearoffMenuItemPrivate *priv = tearoff_menu_item->priv;
319 parent = gtk_widget_get_parent (widget);
320 menu = GTK_IS_MENU (parent) ? GTK_MENU (parent) : NULL;
323 g_signal_handlers_disconnect_by_func (previous,
324 tearoff_state_changed,
329 priv->torn_off = gtk_menu_get_tearoff_state (menu);
330 g_signal_connect (menu, "notify::tearoff-state",
331 G_CALLBACK (tearoff_state_changed),