vcs.maemo.org Git - clutter-gtk/blob - clutter-gtk/gtk-clutter-embed.c

   1 /* gtk-clutter-embed.c: Embeddable ClutterStage
   2  *
   3  * Copyright (C) 2007 OpenedHand
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library. If not see <http://www.fsf.org/licensing>.
  17  *
  18  * Authors:
  19  *   Iain Holmes  <iain@openedhand.com>
  20  *   Emmanuele Bassi  <ebassi@openedhand.com>
  21  */
  22
  23 /**
  24  * SECTION:gtk-clutter-embed
  25  * @short_description: Widget for embedding a Clutter scene
  26  *
  27  * #GtkClutterEmbed is a GTK+ widget embedding a #ClutterStage. Using
  28  * a #GtkClutterEmbed widget is possible to build, show and interact with
  29  * a scene built using Clutter inside a GTK+ application.
  30  *
  31  * <note>To avoid flickering on show, you should call gtk_widget_show()
  32  * or gtk_widget_realize() before calling clutter_actor_show() on the
  33  * embedded #ClutterStage actor. This is needed for Clutter to be able
  34  * to paint on the #GtkClutterEmbed widget.</note>
  35  *
  36  * Since: 0.6
  37  */
  38
  39 #ifdef HAVE_CONFIG_H
  40 #include "config.h"
  41 #endif
  42
  43 #include "gtk-clutter-embed.h"
  44
  45 #include <glib-object.h>
  46
  47 #include <gdk/gdk.h>
  48
  49 #if defined(HAVE_CLUTTER_GTK_X11)
  50
  51 #include <clutter/x11/clutter-x11.h>
  52 #include <gdk/gdkx.h>
  53
  54 #elif defined(HAVE_CLUTTER_GTK_WIN32)
  55
  56 #include <clutter/clutter-win32.h>
  57 #include <gdk/gdkwin32.h>
  58
  59 #endif /* HAVE_CLUTTER_GTK_{X11,WIN32} */
  60
  61 G_DEFINE_TYPE (GtkClutterEmbed, gtk_clutter_embed, GTK_TYPE_WIDGET);
  62
  63 #define GTK_CLUTTER_EMBED_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_CLUTTER_TYPE_EMBED, GtkClutterEmbedPrivate))
  64
  65 struct _GtkClutterEmbedPrivate
  66 {
  67   ClutterActor *stage;
  68
  69   guint queue_redraw_id;
  70 };
  71
  72 static void
  73 gtk_clutter_embed_send_configure (GtkClutterEmbed *embed)
  74 {
  75   GtkWidget *widget;
  76   GdkEvent *event = gdk_event_new (GDK_CONFIGURE);
  77
  78   widget = GTK_WIDGET (embed);
  79
  80   event->configure.window = g_object_ref (widget->window);
  81   event->configure.send_event = TRUE;
  82   event->configure.x = widget->allocation.x;
  83   event->configure.y = widget->allocation.y;
  84   event->configure.width = widget->allocation.width;
  85   event->configure.height = widget->allocation.height;
  86
  87   gtk_widget_event (widget, event);
  88   gdk_event_free (event);
  89 }
  90
  91 static void
  92 on_stage_queue_redraw (ClutterStage *stage,
  93                        ClutterActor *origin,
  94                        gpointer      user_data)
  95 {
  96   GtkWidget *embed = user_data;
  97
  98   /* we stop the emission of the Stage::queue-redraw signal to prevent
  99    * the default handler from running; then we queue a redraw on the
 100    * GtkClutterEmbed widget which will cause an expose event to be
 101    * emitted. the Stage is redrawn in the expose event handler, thus
 102    * "slaving" the Clutter redraw cycle to GTK+'s own
 103    */
 104   g_signal_stop_emission_by_name (stage, "queue-redraw");
 105
 106   gtk_widget_queue_draw (embed);
 107 }
 108
 109 static void
 110 gtk_clutter_embed_dispose (GObject *gobject)
 111 {
 112   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (gobject)->priv;
 113
 114   if (priv->queue_redraw_id)
 115     {
 116       g_signal_handler_disconnect (priv->stage, priv->queue_redraw_id);
 117       priv->queue_redraw_id = 0;
 118     }
 119
 120   if (priv->stage)
 121     {
 122       clutter_actor_destroy (priv->stage);
 123       priv->stage = NULL;
 124     }
 125
 126   G_OBJECT_CLASS (gtk_clutter_embed_parent_class)->dispose (gobject);
 127 }
 128
 129 static void
 130 gtk_clutter_embed_show (GtkWidget *widget)
 131 {
 132   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 133
 134   if (GTK_WIDGET_REALIZED (widget))
 135     clutter_actor_show (priv->stage);
 136
 137   GTK_WIDGET_CLASS (gtk_clutter_embed_parent_class)->show (widget);
 138 }
 139
 140 static void
 141 gtk_clutter_embed_hide (GtkWidget *widget)
 142 {
 143   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 144
 145   clutter_actor_hide (priv->stage);
 146
 147   GTK_WIDGET_CLASS (gtk_clutter_embed_parent_class)->hide (widget);
 148 }
 149
 150 static void
 151 gtk_clutter_embed_realize (GtkWidget *widget)
 152 {
 153   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 154   GdkWindowAttr attributes;
 155   int attributes_mask;
 156
 157 #ifdef HAVE_CLUTTER_GTK_X11
 158   {
 159     const XVisualInfo *xvinfo;
 160     GdkVisual *visual;
 161     GdkColormap *colormap;
 162
 163     /* We need to use the colormap from the Clutter visual */
 164     xvinfo = clutter_x11_get_stage_visual (CLUTTER_STAGE (priv->stage));
 165     if (xvinfo == None)
 166       {
 167         g_critical ("Unable to retrieve the XVisualInfo from Clutter");
 168         return;
 169       }
 170
 171     visual = gdk_x11_screen_lookup_visual (gtk_widget_get_screen (widget),
 172                                            xvinfo->visualid);
 173     colormap = gdk_colormap_new (visual, FALSE);
 174     gtk_widget_set_colormap (widget, colormap);
 175   }
 176 #endif
 177
 178   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 179
 180   attributes.window_type = GDK_WINDOW_CHILD;
 181   attributes.x = widget->allocation.x;
 182   attributes.y = widget->allocation.y;
 183   attributes.width = widget->allocation.width;
 184   attributes.height = widget->allocation.height;
 185   attributes.wclass = GDK_INPUT_OUTPUT;
 186   attributes.visual = gtk_widget_get_visual (widget);
 187   attributes.colormap = gtk_widget_get_colormap (widget);
 188
 189   /* NOTE: GDK_MOTION_NOTIFY above should be safe as Clutter does its own
 190    *       throtling.
 191   */
 192   attributes.event_mask = gtk_widget_get_events (widget)
 193                         | GDK_EXPOSURE_MASK
 194                         | GDK_BUTTON_PRESS_MASK
 195                         | GDK_BUTTON_RELEASE_MASK
 196                         | GDK_KEY_PRESS_MASK
 197                         | GDK_KEY_RELEASE_MASK
 198                         | GDK_POINTER_MOTION_MASK;
 199
 200   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 201
 202   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 203                                    &attributes,
 204                                    attributes_mask);
 205   gdk_window_set_user_data (widget->window, widget);
 206
 207   widget->style = gtk_style_attach (widget->style, widget->window);
 208   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 209
 210   gdk_window_set_back_pixmap (widget->window, NULL, FALSE);
 211
 212 #if defined(HAVE_CLUTTER_GTK_X11)
 213   clutter_x11_set_stage_foreign (CLUTTER_STAGE (priv->stage),
 214                                  GDK_WINDOW_XID (widget->window));
 215 #elif defined(HAVE_CLUTTER_GTK_WIN32)
 216   clutter_win32_set_stage_foreign (CLUTTER_STAGE (priv->stage),
 217                                    GDK_WINDOW_HWND (widget->window));
 218 #endif /* HAVE_CLUTTER_GTK_{X11,WIN32} */
 219
 220   clutter_actor_realize (priv->stage);
 221
 222   if (GTK_WIDGET_VISIBLE (widget))
 223     clutter_actor_show (priv->stage);
 224
 225   gtk_clutter_embed_send_configure (GTK_CLUTTER_EMBED (widget));
 226 }
 227
 228 static void
 229 gtk_clutter_embed_unrealize (GtkWidget *widget)
 230 {
 231   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 232
 233   clutter_actor_hide (priv->stage);
 234
 235   GTK_WIDGET_CLASS (gtk_clutter_embed_parent_class)->unrealize (widget);
 236 }
 237
 238 static void
 239 gtk_clutter_embed_size_allocate (GtkWidget     *widget,
 240                                  GtkAllocation *allocation)
 241 {
 242   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 243
 244   widget->allocation = *allocation;
 245
 246   if (GTK_WIDGET_REALIZED (widget))
 247     {
 248       gdk_window_move_resize (widget->window,
 249                               allocation->x, allocation->y,
 250                               allocation->width, allocation->height);
 251
 252       gtk_clutter_embed_send_configure (GTK_CLUTTER_EMBED (widget));
 253     }
 254
 255   /* change the size of the stage and ensure that the viewport
 256    * has been updated as well
 257    */
 258   clutter_actor_set_size (priv->stage,
 259                           allocation->width,
 260                           allocation->height);
 261
 262   clutter_stage_ensure_viewport (CLUTTER_STAGE (priv->stage));
 263 }
 264
 265 static gboolean
 266 gtk_clutter_embed_expose_event (GtkWidget *widget,
 267                                 GdkEventExpose *event)
 268 {
 269   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 270
 271   /* force a redraw on expose */
 272   clutter_redraw (CLUTTER_STAGE (priv->stage));
 273
 274   return FALSE;
 275 }
 276
 277 static gboolean
 278 gtk_clutter_embed_motion_notify_event (GtkWidget      *widget,
 279                                        GdkEventMotion *event)
 280 {
 281   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 282   ClutterEvent cevent = { 0, };
 283
 284   cevent.type = CLUTTER_MOTION;
 285   cevent.any.stage = CLUTTER_STAGE (priv->stage);
 286   cevent.motion.x = event->x;
 287   cevent.motion.y = event->y;
 288   cevent.motion.time = event->time;
 289   cevent.motion.modifier_state = event->state;
 290
 291   clutter_do_event (&cevent);
 292
 293   /* doh - motion events can push ENTER/LEAVE events onto Clutters
 294    * internal event queue which we do really ever touch (essentially
 295    * proxying from gtks queue). The below pumps them back out and
 296    * processes.
 297    * *could* be side effects with below though doubful as no other
 298    * events reach the queue (we shut down event collection). Maybe
 299    * a peek_mask type call could be even safer.
 300   */
 301   while (clutter_events_pending())
 302     {
 303       ClutterEvent *ev = clutter_event_get ();
 304       if (ev)
 305         {
 306           clutter_do_event (ev);
 307           clutter_event_free (ev);
 308         }
 309     }
 310
 311   return FALSE;
 312 }
 313
 314 static gboolean
 315 gtk_clutter_embed_button_event (GtkWidget      *widget,
 316                                 GdkEventButton *event)
 317 {
 318   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 319   ClutterEvent cevent = { 0, };
 320
 321   if (event->type == GDK_BUTTON_PRESS ||
 322       event->type == GDK_2BUTTON_PRESS ||
 323       event->type == GDK_3BUTTON_PRESS)
 324     cevent.type = cevent.button.type = CLUTTER_BUTTON_PRESS;
 325   else if (event->type == GDK_BUTTON_RELEASE)
 326     cevent.type = cevent.button.type = CLUTTER_BUTTON_RELEASE;
 327   else
 328     return FALSE;
 329
 330   cevent.any.stage = CLUTTER_STAGE (priv->stage);
 331   cevent.button.x = event->x;
 332   cevent.button.y = event->y;
 333   cevent.button.time = event->time;
 334   cevent.button.click_count =
 335     (event->type == GDK_BUTTON_PRESS ? 1
 336                                      : (event->type == GDK_2BUTTON_PRESS ? 2
 337                                                                          : 3));
 338   cevent.button.modifier_state = event->state;
 339   cevent.button.button = event->button;
 340
 341   clutter_do_event (&cevent);
 342
 343   return FALSE;
 344 }
 345
 346 static gboolean
 347 gtk_clutter_embed_key_event (GtkWidget   *widget,
 348                              GdkEventKey *event)
 349 {
 350   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 351   ClutterEvent cevent = { 0, };
 352
 353   if (event->type == GDK_KEY_PRESS)
 354     cevent.type = cevent.key.type = CLUTTER_KEY_PRESS;
 355   else if (event->type == GDK_KEY_RELEASE)
 356     cevent.type = cevent.key.type = CLUTTER_KEY_RELEASE;
 357   else
 358     return FALSE;
 359
 360   cevent.any.stage = CLUTTER_STAGE (priv->stage);
 361   cevent.key.time = event->time;
 362   cevent.key.modifier_state = event->state;
 363   cevent.key.keyval = event->keyval;
 364   cevent.key.hardware_keycode = event->hardware_keycode;
 365   cevent.key.unicode_value = gdk_keyval_to_unicode (event->keyval);
 366
 367   clutter_do_event (&cevent);
 368
 369   return FALSE;
 370 }
 371
 372 static gboolean
 373 gtk_clutter_embed_map_event (GtkWidget   *widget,
 374                              GdkEventAny *event)
 375 {
 376   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 377   GtkWidgetClass *parent_class;
 378   gboolean res = FALSE;
 379
 380   parent_class = GTK_WIDGET_CLASS (gtk_clutter_embed_parent_class);
 381   if (parent_class->map_event)
 382     res = parent_class->map_event (widget, event);
 383
 384   clutter_actor_map (priv->stage);
 385
 386   return res;
 387 }
 388
 389 static gboolean
 390 gtk_clutter_embed_unmap_event (GtkWidget   *widget,
 391                                GdkEventAny *event)
 392 {
 393   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 394   GtkWidgetClass *parent_class;
 395   gboolean res = FALSE;
 396
 397   parent_class = GTK_WIDGET_CLASS (gtk_clutter_embed_parent_class);
 398   if (parent_class->unmap_event)
 399     res = parent_class->unmap_event (widget, event);
 400
 401   clutter_actor_unmap (priv->stage);
 402
 403   return res;
 404 }
 405
 406 static void
 407 gtk_clutter_embed_unmap (GtkWidget *widget)
 408 {
 409   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 410
 411   clutter_actor_unmap (priv->stage);
 412
 413   GTK_WIDGET_CLASS (gtk_clutter_embed_parent_class)->unmap (widget);
 414 }
 415
 416 static gboolean
 417 gtk_clutter_embed_focus_in (GtkWidget     *widget,
 418                             GdkEventFocus *event)
 419 {
 420   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 421
 422   g_signal_emit_by_name (priv->stage, "activate");
 423
 424   return FALSE;
 425 }
 426
 427 static gboolean
 428 gtk_clutter_embed_focus_out (GtkWidget     *widget,
 429                              GdkEventFocus *event)
 430 {
 431   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 432
 433   g_signal_emit_by_name (priv->stage, "deactivate");
 434
 435   /* give back key focus to the stage */
 436   clutter_stage_set_key_focus (CLUTTER_STAGE (priv->stage), NULL);
 437
 438   return FALSE;
 439 }
 440
 441 static gboolean
 442 gtk_clutter_embed_scroll_event (GtkWidget      *widget,
 443                                 GdkEventScroll *event)
 444 {
 445   GtkClutterEmbedPrivate *priv = GTK_CLUTTER_EMBED (widget)->priv;
 446
 447   ClutterEvent cevent = { 0, };
 448
 449   if (event->type == GDK_SCROLL)
 450     cevent.type = cevent.scroll.type = CLUTTER_SCROLL;
 451   else
 452     return FALSE;
 453
 454   cevent.any.stage = CLUTTER_STAGE (priv->stage);
 455   cevent.scroll.x = (gint) event->x;
 456   cevent.scroll.y = (gint) event->y;
 457   cevent.scroll.time = event->time;
 458   cevent.scroll.direction = event->direction;
 459   cevent.scroll.modifier_state = event->state;
 460
 461   clutter_do_event (&cevent);
 462
 463   return FALSE;
 464 }
 465
 466 static void
 467 gtk_clutter_embed_style_set (GtkWidget *widget,
 468                              GtkStyle  *old_style)
 469 {
 470   GdkScreen *screen;
 471   GtkSettings *settings;
 472   gdouble dpi;
 473   gchar *font_name;
 474   const cairo_font_options_t *font_options;
 475   gint double_click_time, double_click_distance;
 476   ClutterBackend *backend;
 477
 478   GTK_WIDGET_CLASS (gtk_clutter_embed_parent_class)->style_set (widget,
 479                                                                 old_style);
 480
 481   if (gtk_widget_has_screen (widget))
 482     screen = gtk_widget_get_screen (widget);
 483   else
 484     screen = gdk_screen_get_default ();
 485
 486   dpi = gdk_screen_get_resolution (screen);
 487   if (dpi < 0)
 488     dpi = 96.0;
 489
 490   font_options = gdk_screen_get_font_options (screen);
 491
 492   settings = gtk_settings_get_for_screen (screen);
 493   g_object_get (G_OBJECT (settings),
 494                 "gtk-font-name", &font_name,
 495                 "gtk-double-click-time", &double_click_time,
 496                 "gtk-double-click-distance", &double_click_distance,
 497                 NULL);
 498
 499   /* copy all settings and values coming from GTK+ into
 500    * the ClutterBackend; this way, a scene embedded into
 501    * a GtkClutterEmbed will not look completely alien
 502    */
 503   backend = clutter_get_default_backend ();
 504   clutter_backend_set_resolution (backend, dpi);
 505   clutter_backend_set_font_options (backend, font_options);
 506   clutter_backend_set_font_name (backend, font_name);
 507   clutter_backend_set_double_click_time (backend, double_click_time);
 508   clutter_backend_set_double_click_distance (backend, double_click_distance);
 509
 510   g_free (font_name);
 511 }
 512
 513 static void
 514 gtk_clutter_embed_class_init (GtkClutterEmbedClass *klass)
 515 {
 516   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 517   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 518
 519   g_type_class_add_private (klass, sizeof (GtkClutterEmbedPrivate));
 520
 521   gobject_class->dispose = gtk_clutter_embed_dispose;
 522
 523   widget_class->style_set = gtk_clutter_embed_style_set;
 524   widget_class->size_allocate = gtk_clutter_embed_size_allocate;
 525   widget_class->realize = gtk_clutter_embed_realize;
 526   widget_class->unrealize = gtk_clutter_embed_unrealize;
 527   widget_class->show = gtk_clutter_embed_show;
 528   widget_class->hide = gtk_clutter_embed_hide;
 529   widget_class->unmap = gtk_clutter_embed_unmap;
 530   widget_class->expose_event = gtk_clutter_embed_expose_event;
 531   widget_class->button_press_event = gtk_clutter_embed_button_event;
 532   widget_class->button_release_event = gtk_clutter_embed_button_event;
 533   widget_class->key_press_event = gtk_clutter_embed_key_event;
 534   widget_class->key_release_event = gtk_clutter_embed_key_event;
 535   widget_class->motion_notify_event = gtk_clutter_embed_motion_notify_event;
 536   widget_class->expose_event = gtk_clutter_embed_expose_event;
 537   widget_class->map_event = gtk_clutter_embed_map_event;
 538   widget_class->unmap_event = gtk_clutter_embed_unmap_event;
 539   widget_class->focus_in_event = gtk_clutter_embed_focus_in;
 540   widget_class->focus_out_event = gtk_clutter_embed_focus_out;
 541   widget_class->scroll_event = gtk_clutter_embed_scroll_event;
 542 }
 543
 544 static void
 545 gtk_clutter_embed_init (GtkClutterEmbed *embed)
 546 {
 547   GtkClutterEmbedPrivate *priv;
 548
 549   embed->priv = priv = GTK_CLUTTER_EMBED_GET_PRIVATE (embed);
 550
 551   GTK_WIDGET_SET_FLAGS (embed, GTK_CAN_FOCUS);
 552   GTK_WIDGET_UNSET_FLAGS (embed, GTK_NO_WINDOW);
 553
 554   /* disable double-buffering: it's automatically provided
 555    * by OpenGL
 556    */
 557   gtk_widget_set_double_buffered (GTK_WIDGET (embed), FALSE);
 558
 559   /* we always create new stages rather than use the default */
 560   priv->stage = clutter_stage_new ();
 561
 562   /* intercept the queue-redraw signal of the stage to know when
 563    * Clutter-side requests a redraw; this way we can also request
 564    * a redraw GTK-side
 565    */
 566   priv->queue_redraw_id =
 567     g_signal_connect (priv->stage,
 568                       "queue-redraw", G_CALLBACK (on_stage_queue_redraw),
 569                       embed);
 570 }
 571
 572 /**
 573  * gtk_clutter_embed_new:
 574  *
 575  * Creates a new #GtkClutterEmbed widget. This widget can be
 576  * used to build a scene using Clutter API into a GTK+ application.
 577  *
 578  * Return value: the newly created #GtkClutterEmbed
 579  *
 580  * Since: 0.6
 581  */
 582 GtkWidget *
 583 gtk_clutter_embed_new (void)
 584 {
 585   return g_object_new (GTK_CLUTTER_TYPE_EMBED, NULL);
 586 }
 587
 588 /**
 589  * gtk_clutter_embed_get_stage:
 590  * @embed: a #GtkClutterEmbed
 591  *
 592  * Retrieves the #ClutterStage from @embed. The returned stage can be
 593  * used to add actors to the Clutter scene.
 594  *
 595  * Return value: the Clutter stage. You should never destroy or unref
 596  *   the returned actor.
 597  *
 598  * Since: 0.6
 599  */
 600 ClutterActor *
 601 gtk_clutter_embed_get_stage (GtkClutterEmbed *embed)
 602 {
 603   g_return_val_if_fail (GTK_CLUTTER_IS_EMBED (embed), NULL);
 604
 605   return embed->priv->stage;
 606 }