Pileus Git - ~andy/gtk/blob - gtk/gtkimagemenuitem.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 2001 Red Hat, Inc.
   3  *
   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.
   8  *
   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.
  13  *
  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.
  18  */
  19
  20 /*
  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/.
  25  */
  26
  27 #include "gtkimagemenuitem.h"
  28 #include "gtkaccellabel.h"
  29 #include "gtksignal.h"
  30 #include "gtkintl.h"
  31
  32 static void gtk_image_menu_item_class_init           (GtkImageMenuItemClass *klass);
  33 static void gtk_image_menu_item_init                 (GtkImageMenuItem      *image_menu_item);
  34 static void gtk_image_menu_item_size_request         (GtkWidget        *widget,
  35                                                       GtkRequisition   *requisition);
  36 static void gtk_image_menu_item_size_allocate        (GtkWidget        *widget,
  37                                                       GtkAllocation    *allocation);
  38 static gint gtk_image_menu_item_expose               (GtkWidget             *widget,
  39                                                       GdkEventExpose        *event);
  40 static void gtk_image_menu_item_remove               (GtkContainer          *container,
  41                                                       GtkWidget             *child);
  42 static void gtk_image_menu_item_toggle_size_request  (GtkMenuItem           *menu_item,
  43                                                       gint                  *requisition);
  44
  45 static void gtk_image_menu_item_map        (GtkWidget      *widget);
  46 static void gtk_image_menu_item_unmap      (GtkWidget      *widget);
  47 static void gtk_image_menu_item_forall     (GtkContainer   *container,
  48                                             gboolean        include_internals,
  49                                             GtkCallback     callback,
  50                                             gpointer        callback_data);
  51
  52 static void gtk_image_menu_item_set_property (GObject         *object,
  53                                               guint            prop_id,
  54                                               const GValue    *value,
  55                                               GParamSpec      *pspec);
  56 static void gtk_image_menu_item_get_property (GObject         *object,
  57                                               guint            prop_id,
  58                                               GValue          *value,
  59                                               GParamSpec      *pspec);
  60
  61
  62 enum {
  63   PROP_ZERO,
  64   PROP_IMAGE
  65 };
  66
  67 static GtkMenuItemClass *parent_class = NULL;
  68
  69 GtkType
  70 gtk_image_menu_item_get_type (void)
  71 {
  72   static GtkType image_menu_item_type = 0;
  73
  74   if (!image_menu_item_type)
  75     {
  76       static const GtkTypeInfo image_menu_item_info =
  77       {
  78         "GtkImageMenuItem",
  79         sizeof (GtkImageMenuItem),
  80         sizeof (GtkImageMenuItemClass),
  81         (GtkClassInitFunc) gtk_image_menu_item_class_init,
  82         (GtkObjectInitFunc) gtk_image_menu_item_init,
  83         /* reserved_1 */ NULL,
  84         /* reserved_2 */ NULL,
  85         (GtkClassInitFunc) NULL,
  86       };
  87
  88       image_menu_item_type = gtk_type_unique (GTK_TYPE_MENU_ITEM, &image_menu_item_info);
  89     }
  90
  91   return image_menu_item_type;
  92 }
  93
  94 static void
  95 gtk_image_menu_item_class_init (GtkImageMenuItemClass *klass)
  96 {
  97   GObjectClass *gobject_class;
  98   GtkObjectClass *object_class;
  99   GtkWidgetClass *widget_class;
 100   GtkMenuItemClass *menu_item_class;
 101   GtkContainerClass *container_class;
 102
 103   gobject_class = (GObjectClass*) klass;
 104   object_class = (GtkObjectClass*) klass;
 105   widget_class = (GtkWidgetClass*) klass;
 106   menu_item_class = (GtkMenuItemClass*) klass;
 107   container_class = (GtkContainerClass*) klass;
 108
 109   parent_class = gtk_type_class (GTK_TYPE_MENU_ITEM);
 110
 111   widget_class->expose_event = gtk_image_menu_item_expose;
 112   widget_class->size_request = gtk_image_menu_item_size_request;
 113   widget_class->size_allocate = gtk_image_menu_item_size_allocate;
 114   widget_class->map = gtk_image_menu_item_map;
 115   widget_class->unmap = gtk_image_menu_item_unmap;
 116
 117   container_class->forall = gtk_image_menu_item_forall;
 118   container_class->remove = gtk_image_menu_item_remove;
 119
 120   menu_item_class->toggle_size_request = gtk_image_menu_item_toggle_size_request;
 121
 122   gobject_class->set_property = gtk_image_menu_item_set_property;
 123   gobject_class->get_property = gtk_image_menu_item_get_property;
 124
 125   g_object_class_install_property (gobject_class,
 126                                    PROP_IMAGE,
 127                                    g_param_spec_object ("image",
 128                                                         _("Image widget"),
 129                                                         _("Child widget to appear next to the menu text"),
 130                                                         GTK_TYPE_WIDGET,
 131                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 132 }
 133
 134 static void
 135 gtk_image_menu_item_init (GtkImageMenuItem *image_menu_item)
 136 {
 137   image_menu_item->image = NULL;
 138 }
 139
 140 static void
 141 gtk_image_menu_item_set_property (GObject         *object,
 142                                   guint            prop_id,
 143                                   const GValue    *value,
 144                                   GParamSpec      *pspec)
 145 {
 146   GtkImageMenuItem *image_menu_item = GTK_IMAGE_MENU_ITEM (object);
 147
 148   switch (prop_id)
 149     {
 150     case PROP_IMAGE:
 151       {
 152         GtkWidget *child;
 153
 154         child = (GtkWidget*) g_value_get_object (value);
 155
 156         if (child != image_menu_item->image)
 157           {
 158             if (image_menu_item->image)
 159               gtk_container_remove (GTK_CONTAINER (image_menu_item),
 160                                     image_menu_item->image);
 161
 162             if (child)
 163               {
 164                 gtk_image_menu_item_add_image (image_menu_item,
 165                                                child);
 166               }
 167           }
 168       }
 169       break;
 170     default:
 171       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 172       break;
 173     }
 174 }
 175 static void
 176 gtk_image_menu_item_get_property (GObject         *object,
 177                                   guint            prop_id,
 178                                   GValue          *value,
 179                                   GParamSpec      *pspec)
 180 {
 181   GtkImageMenuItem *image_menu_item = GTK_IMAGE_MENU_ITEM (object);
 182
 183   switch (prop_id)
 184     {
 185     case PROP_IMAGE:
 186       g_value_set_object (value,
 187                           (GObject*) image_menu_item->image);
 188       break;
 189     default:
 190       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 191       break;
 192     }
 193 }
 194
 195
 196 static void
 197 gtk_image_menu_item_toggle_size_request (GtkMenuItem *menu_item,
 198                                          gint        *requisition)
 199 {
 200   GtkImageMenuItem *image_menu_item;
 201
 202   g_return_if_fail (menu_item != NULL);
 203   g_return_if_fail (GTK_IS_IMAGE_MENU_ITEM (menu_item));
 204
 205   image_menu_item = GTK_IMAGE_MENU_ITEM (menu_item);
 206
 207   if (image_menu_item->image)
 208     *requisition = image_menu_item->image->requisition.width;
 209   else
 210     *requisition = 0;
 211 }
 212
 213
 214 static void
 215 gtk_image_menu_item_size_request (GtkWidget      *widget,
 216                                   GtkRequisition *requisition)
 217 {
 218   GtkImageMenuItem *image_menu_item;
 219   gint child_height = 0;
 220
 221   image_menu_item = GTK_IMAGE_MENU_ITEM (widget);
 222
 223   if (image_menu_item->image && GTK_WIDGET_VISIBLE (image_menu_item->image))
 224     {
 225       GtkRequisition child_requisition;
 226
 227       gtk_widget_size_request (image_menu_item->image,
 228                                &child_requisition);
 229
 230       child_height = child_requisition.height;
 231     }
 232
 233   (* GTK_WIDGET_CLASS (parent_class)->size_request) (widget, requisition);
 234
 235   /* not done with height since that happens via the
 236    * toggle_size_request
 237    */
 238   requisition->height = MAX (requisition->height, child_height);
 239
 240   /* Note that GtkMenuShell always size requests before
 241    * toggle_size_request, so toggle_size_request will be able to use
 242    * image_menu_item->image->requisition
 243    */
 244 }
 245
 246 static void
 247 gtk_image_menu_item_size_allocate (GtkWidget     *widget,
 248                                    GtkAllocation *allocation)
 249 {
 250   GtkImageMenuItem *image_menu_item;
 251
 252   image_menu_item = GTK_IMAGE_MENU_ITEM (widget);
 253
 254   (* GTK_WIDGET_CLASS (parent_class)->size_allocate) (widget, allocation);
 255
 256   if (image_menu_item->image)
 257     {
 258       gint width, height, x, y;
 259       GtkAllocation child_allocation;
 260
 261       /* Man this is lame hardcoding action, but I can't
 262        * come up with a solution that's really better.
 263        */
 264
 265       width = image_menu_item->image->requisition.width;
 266       height = image_menu_item->image->requisition.height;
 267
 268       x = (GTK_CONTAINER (image_menu_item)->border_width +
 269            widget->style->xthickness) +
 270         (GTK_MENU_ITEM (image_menu_item)->toggle_size - width) / 2;
 271       y = (widget->allocation.height - height) / 2;
 272
 273       child_allocation.width = width;
 274       child_allocation.height = height;
 275       child_allocation.x = MAX (x, 0);
 276       child_allocation.y = MAX (y, 0);
 277
 278       gtk_widget_size_allocate (image_menu_item->image, &child_allocation);
 279     }
 280 }
 281
 282 static gint
 283 gtk_image_menu_item_expose (GtkWidget      *widget,
 284                             GdkEventExpose *event)
 285 {
 286   GdkEventExpose child_event;
 287   GtkImageMenuItem *image_menu_item;
 288
 289   g_return_val_if_fail (widget != NULL, FALSE);
 290   g_return_val_if_fail (GTK_IS_IMAGE_MENU_ITEM (widget), FALSE);
 291   g_return_val_if_fail (event != NULL, FALSE);
 292
 293   image_menu_item = GTK_IMAGE_MENU_ITEM (widget);
 294
 295   if (GTK_WIDGET_CLASS (parent_class)->expose_event)
 296     (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 297
 298   child_event = *event;
 299   if (image_menu_item->image && GTK_WIDGET_DRAWABLE (image_menu_item->image) &&
 300       GTK_WIDGET_NO_WINDOW (image_menu_item->image) &&
 301       gtk_widget_intersect (image_menu_item->image, &event->area, &child_event.area))
 302     gtk_widget_event (image_menu_item->image, (GdkEvent*) &child_event);
 303
 304   return FALSE;
 305 }
 306
 307 static void
 308 gtk_image_menu_item_map (GtkWidget *widget)
 309 {
 310   GtkImageMenuItem *image_menu_item;
 311
 312   g_return_if_fail (GTK_IS_IMAGE_MENU_ITEM (widget));
 313
 314   image_menu_item = GTK_IMAGE_MENU_ITEM (widget);
 315
 316   (* GTK_WIDGET_CLASS (parent_class)->map) (widget);
 317
 318   if (image_menu_item->image &&
 319       GTK_WIDGET_VISIBLE (image_menu_item->image) &&
 320       !GTK_WIDGET_MAPPED (image_menu_item->image))
 321     gtk_widget_map (image_menu_item->image);
 322
 323   if (!GTK_WIDGET_NO_WINDOW (widget))
 324     gdk_window_show (widget->window);
 325 }
 326
 327 static void
 328 gtk_image_menu_item_unmap (GtkWidget *widget)
 329 {
 330   GtkImageMenuItem *image_menu_item;
 331
 332   g_return_if_fail (GTK_IS_IMAGE_MENU_ITEM (widget));
 333
 334   image_menu_item = GTK_IMAGE_MENU_ITEM (widget);
 335
 336   (* GTK_WIDGET_CLASS (parent_class)->unmap) (widget);
 337
 338   if (!GTK_WIDGET_NO_WINDOW (widget))
 339     gdk_window_hide (widget->window);
 340
 341   if (image_menu_item->image && GTK_WIDGET_MAPPED (image_menu_item->image))
 342     gtk_widget_unmap (image_menu_item->image);
 343 }
 344
 345 static void
 346 gtk_image_menu_item_forall (GtkContainer   *container,
 347                             gboolean        include_internals,
 348                             GtkCallback     callback,
 349                             gpointer        callback_data)
 350 {
 351   GtkImageMenuItem *image_menu_item;
 352
 353   g_return_if_fail (GTK_IS_IMAGE_MENU_ITEM (container));
 354
 355   image_menu_item = GTK_IMAGE_MENU_ITEM (container);
 356
 357   (* GTK_CONTAINER_CLASS (parent_class)->forall) (container,
 358                                                   include_internals,
 359                                                   callback,
 360                                                   callback_data);
 361
 362   if (image_menu_item->image)
 363     (* callback) (image_menu_item->image, callback_data);
 364 }
 365
 366 GtkWidget*
 367 gtk_image_menu_item_new (GtkWidget   *widget,
 368                          const gchar *label)
 369 {
 370   GtkImageMenuItem *image_menu_item;
 371   GtkWidget *accel_label;
 372
 373   image_menu_item = GTK_IMAGE_MENU_ITEM (g_object_new (GTK_TYPE_IMAGE_MENU_ITEM,
 374                                                        NULL));
 375
 376   accel_label = gtk_accel_label_new (label);
 377   gtk_misc_set_alignment (GTK_MISC (accel_label), 0.0, 0.5);
 378
 379   gtk_container_add (GTK_CONTAINER (image_menu_item), accel_label);
 380   gtk_accel_label_set_accel_widget (GTK_ACCEL_LABEL (accel_label),
 381                                     GTK_WIDGET (image_menu_item));
 382   gtk_widget_show (accel_label);
 383
 384   if (widget)
 385     gtk_image_menu_item_add_image (image_menu_item, widget);
 386
 387   return GTK_WIDGET(image_menu_item);
 388 }
 389
 390 void
 391 gtk_image_menu_item_add_image (GtkImageMenuItem *image_menu_item,
 392                                GtkWidget        *child)
 393 {
 394   g_return_if_fail (GTK_IS_IMAGE_MENU_ITEM (image_menu_item));
 395   g_return_if_fail (image_menu_item->image == NULL);
 396
 397   gtk_widget_set_parent (child, GTK_WIDGET (image_menu_item));
 398   image_menu_item->image = child;
 399
 400   g_object_notify (G_OBJECT (image_menu_item), "image");
 401
 402   if (GTK_WIDGET_REALIZED (child->parent))
 403     gtk_widget_realize (child);
 404
 405   if (GTK_WIDGET_VISIBLE (child->parent) && GTK_WIDGET_VISIBLE (child))
 406     {
 407       if (GTK_WIDGET_MAPPED (child->parent))
 408         gtk_widget_map (child);
 409
 410       gtk_widget_queue_resize (child);
 411     }
 412 }
 413
 414 GtkWidget*
 415 gtk_image_menu_item_get_image (GtkImageMenuItem *image_menu_item)
 416 {
 417   g_return_val_if_fail (GTK_IS_IMAGE_MENU_ITEM (image_menu_item), NULL);
 418
 419   return image_menu_item->image;
 420 }
 421
 422 static void
 423 gtk_image_menu_item_remove (GtkContainer *container,
 424                             GtkWidget    *child)
 425 {
 426   GtkImageMenuItem *image_menu_item;
 427
 428   image_menu_item = GTK_IMAGE_MENU_ITEM (container);
 429
 430   if (child == image_menu_item->image)
 431     {
 432       gboolean widget_was_visible;
 433
 434       widget_was_visible = GTK_WIDGET_VISIBLE (child);
 435
 436       gtk_widget_unparent (child);
 437       image_menu_item->image = NULL;
 438
 439       if (GTK_WIDGET_VISIBLE (container) && widget_was_visible)
 440         gtk_widget_queue_resize (GTK_WIDGET (container));
 441
 442       g_object_notify (G_OBJECT (image_menu_item), "image");
 443     }
 444   else
 445     {
 446       (* GTK_CONTAINER_CLASS (parent_class)->remove) (container, child);
 447     }
 448 }
 449
 450