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, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
29 #include "gtkmenuprivate.h"
30 #include "gtkmenuitemprivate.h"
31 #include "gtktearoffmenuitem.h"
36 * SECTION:gtktearoffmenuitem
37 * @Short_description: A menu item used to tear off and reattach its menu
38 * @Title: GtkTearoffMenuItem
41 * A #GtkTearoffMenuItem is a special #GtkMenuItem which is used to
42 * tear off and reattach its menu.
44 * When its menu is shown normally, the #GtkTearoffMenuItem is drawn as a
45 * dotted line indicating that the menu can be torn off. Activating it
46 * causes its menu to be torn off and displayed in its own window
49 * When its menu is shown as a tearoff menu, the #GtkTearoffMenuItem is drawn
50 * as a dotted line which has a left pointing arrow graphic indicating that
51 * the tearoff menu can be reattached. Activating it will erase the tearoff
54 * <note>#GtkTearoffMenuItem is deprecated and should not be used in newly
55 * written code. Menus are not meant to be torn around.</note>
61 #define BORDER_SPACING 3
63 struct _GtkTearoffMenuItemPrivate
68 static void gtk_tearoff_menu_item_get_preferred_width (GtkWidget *widget,
71 static void gtk_tearoff_menu_item_get_preferred_height (GtkWidget *widget,
74 static gboolean gtk_tearoff_menu_item_draw (GtkWidget *widget,
76 static void gtk_tearoff_menu_item_activate (GtkMenuItem *menu_item);
77 static void gtk_tearoff_menu_item_parent_set (GtkWidget *widget,
80 G_DEFINE_TYPE (GtkTearoffMenuItem, gtk_tearoff_menu_item, GTK_TYPE_MENU_ITEM)
83 * gtk_tearoff_menu_item_new:
85 * Creates a new #GtkTearoffMenuItem.
87 * Returns: a new #GtkTearoffMenuItem.
89 * Deprecated: 3.4: #GtkTearoffMenuItem is deprecated and should not be
90 * used in newly written code.
93 gtk_tearoff_menu_item_new (void)
95 return g_object_new (GTK_TYPE_TEAROFF_MENU_ITEM, NULL);
99 gtk_tearoff_menu_item_class_init (GtkTearoffMenuItemClass *klass)
101 GtkWidgetClass *widget_class;
102 GtkMenuItemClass *menu_item_class;
104 widget_class = (GtkWidgetClass*) klass;
105 menu_item_class = (GtkMenuItemClass*) klass;
107 widget_class->draw = gtk_tearoff_menu_item_draw;
108 widget_class->get_preferred_width = gtk_tearoff_menu_item_get_preferred_width;
109 widget_class->get_preferred_height = gtk_tearoff_menu_item_get_preferred_height;
110 widget_class->parent_set = gtk_tearoff_menu_item_parent_set;
112 gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_TEAR_OFF_MENU_ITEM);
114 menu_item_class->activate = gtk_tearoff_menu_item_activate;
116 g_type_class_add_private (klass, sizeof (GtkTearoffMenuItemPrivate));
120 gtk_tearoff_menu_item_init (GtkTearoffMenuItem *tearoff_menu_item)
122 GtkTearoffMenuItemPrivate *priv;
124 tearoff_menu_item->priv = G_TYPE_INSTANCE_GET_PRIVATE (tearoff_menu_item,
125 GTK_TYPE_TEAROFF_MENU_ITEM,
126 GtkTearoffMenuItemPrivate);
127 priv = tearoff_menu_item->priv;
129 priv->torn_off = FALSE;
133 gtk_tearoff_menu_item_get_preferred_width (GtkWidget *widget,
137 GtkStyleContext *context;
142 context = gtk_widget_get_style_context (widget);
143 state = gtk_widget_get_state_flags (widget);
145 gtk_style_context_get_padding (context, state, &padding);
146 border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
148 *minimum = *natural = (border_width + BORDER_SPACING) * 2 + padding.left + padding.right;
152 gtk_tearoff_menu_item_get_preferred_height (GtkWidget *widget,
156 GtkStyleContext *context;
162 context = gtk_widget_get_style_context (widget);
163 state = gtk_widget_get_state_flags (widget);
165 gtk_style_context_get_padding (context, state, &padding);
166 border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
168 *minimum = *natural = (border_width * 2) + padding.top + padding.bottom;
170 parent = gtk_widget_get_parent (widget);
171 if (GTK_IS_MENU (parent) && GTK_MENU (parent)->priv->torn_off)
173 *minimum += ARROW_SIZE;
174 *natural += ARROW_SIZE;
178 *minimum += padding.top + 4;
179 *natural += padding.top + 4;
184 gtk_tearoff_menu_item_draw (GtkWidget *widget,
187 GtkMenuItem *menu_item;
189 GtkStyleContext *context;
191 gint x, y, width, height;
194 GtkTextDirection direction;
198 menu_item = GTK_MENU_ITEM (widget);
199 context = gtk_widget_get_style_context (widget);
200 direction = gtk_widget_get_direction (widget);
201 state = gtk_widget_get_state_flags (widget);
203 border_width = gtk_container_get_border_width (GTK_CONTAINER (menu_item));
206 width = gtk_widget_get_allocated_width (widget) - border_width * 2;
207 height = gtk_widget_get_allocated_height (widget) - border_width * 2;
208 right_max = x + width;
210 gtk_style_context_save (context);
211 gtk_style_context_set_state (context, state);
212 gtk_style_context_get_padding (context, state, &padding);
214 if (state & GTK_STATE_FLAG_PRELIGHT)
216 gtk_render_background (context, cr, x, y, width, height);
217 gtk_render_frame (context, cr, x, y, width, height);
220 parent = gtk_widget_get_parent (widget);
221 if (GTK_IS_MENU (parent) && GTK_MENU (parent)->priv->torn_off)
225 if (menu_item->priv->toggle_size > ARROW_SIZE)
227 if (direction == GTK_TEXT_DIR_LTR)
229 arrow_x = x + (menu_item->priv->toggle_size - ARROW_SIZE)/2;
230 angle = (3 * G_PI) / 2;
234 arrow_x = x + width - menu_item->priv->toggle_size + (menu_item->priv->toggle_size - ARROW_SIZE)/2;
237 x += menu_item->priv->toggle_size + BORDER_SPACING;
241 if (direction == GTK_TEXT_DIR_LTR)
243 arrow_x = ARROW_SIZE / 2;
244 angle = (3 * G_PI) / 2;
248 arrow_x = x + width - 2 * ARROW_SIZE + ARROW_SIZE / 2;
254 gtk_render_arrow (context, cr, angle,
255 arrow_x, height / 2 - 5,
259 while (x < right_max)
263 if (direction == GTK_TEXT_DIR_LTR)
266 x2 = MIN (x + TEAR_LENGTH, right_max);
271 x2 = MAX (right_max - x - TEAR_LENGTH, 0);
274 gtk_render_line (context, cr,
275 x1, y + (height - padding.bottom) / 2,
276 x2, y + (height - padding.bottom) / 2);
277 x += 2 * TEAR_LENGTH;
280 gtk_style_context_restore (context);
286 gtk_tearoff_menu_item_activate (GtkMenuItem *menu_item)
290 parent = gtk_widget_get_parent (GTK_WIDGET (menu_item));
291 if (GTK_IS_MENU (parent))
293 GtkMenu *menu = GTK_MENU (parent);
295 gtk_widget_queue_resize (GTK_WIDGET (menu_item));
296 gtk_menu_set_tearoff_state (GTK_MENU (parent),
297 !menu->priv->torn_off);
302 tearoff_state_changed (GtkMenu *menu,
306 GtkTearoffMenuItem *tearoff_menu_item = GTK_TEAROFF_MENU_ITEM (data);
307 GtkTearoffMenuItemPrivate *priv = tearoff_menu_item->priv;
309 priv->torn_off = gtk_menu_get_tearoff_state (menu);
313 gtk_tearoff_menu_item_parent_set (GtkWidget *widget,
316 GtkTearoffMenuItem *tearoff_menu_item = GTK_TEAROFF_MENU_ITEM (widget);
317 GtkTearoffMenuItemPrivate *priv = tearoff_menu_item->priv;
321 parent = gtk_widget_get_parent (widget);
322 menu = GTK_IS_MENU (parent) ? GTK_MENU (parent) : NULL;
325 g_signal_handlers_disconnect_by_func (previous,
326 tearoff_state_changed,
331 priv->torn_off = gtk_menu_get_tearoff_state (menu);
332 g_signal_connect (menu, "notify::tearoff-state",
333 G_CALLBACK (tearoff_state_changed),