src/gtk/eggtrayicon.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /* eggtrayicon.c
   3  * Copyright (C) 2002 Anders Carlsson <andersca@gnu.org>
   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, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22
  23 Permission to use this file under wxWindows licence given by
  24 copyright holder:
  25 --------
  26 From andersca@gnu.org Tue Dec  9 13:01:56 2003
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  61 Subject: Re: eggtrayicon.{c,h} licensing
  62 From: Anders Carlsson <andersca@gnu.org>
  63 To: Vaclav Slavik <vaclav.slavik@matfyz.cz>
  64 In-Reply-To: <200312091142.54542.vaclav.slavik@matfyz.cz>
  65 References: <200312091142.54542.vaclav.slavik@matfyz.cz>
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  80
  81 On tis, 2003-12-09 at 11:42 +0100, Vaclav Slavik wrote:
  82 > Hi,
  83 >
  84 > I'm working on the wxWindows cross-platform GUI toolkit
  85 > (http://www.wxwindows.org) which uses GTK+ and it would save me a lot
  86 > of time if I could use your eggtrayicon code to implement tray icons
  87 > on X11. Unfortunately I can't use it right now because it is not part
  88 > of any library we could depend on (as we do depend on GTK+) and would
  89 > have to be included in our sources and it is under the LGPL license.
  90 > The problem is that wxWindows' license is more permissive (see
  91 > http://www.opensource.org/licenses/wxwindows.php for details) and so
  92 > I can't take your code and put it under wxWindows License. And I
  93 > can't put code that can't be used under the terms of wxWindows
  94 > License into wxWindows either. Do you think it would be possible to
  95 > get permission to include eggtrayicon under wxWindows license?
  96 >
  97 > Thanks,
  98 > Vaclav
  99 >
 100
 101 Sure, that's fine by me.
 102
 103 Anders
 104 --------
 105 */
 106
 107
 108 #include "wx/platform.h"
 109
 110 #if wxUSE_TASKBARICON
 111
 112 #include <gtk/gtk.h>
 113 #if GTK_CHECK_VERSION(2, 1, 0)
 114
 115 #include <string.h>
 116 #include "eggtrayicon.h"
 117
 118 #include <gdkconfig.h>
 119 #if defined (GDK_WINDOWING_X11)
 120 #include <gdk/gdkx.h>
 121 #include <X11/Xatom.h>
 122 #elif defined (GDK_WINDOWING_WIN32)
 123 #include <gdk/gdkwin32.h>
 124 #endif
 125
 126
 127 #define SYSTEM_TRAY_REQUEST_DOCK    0
 128 #define SYSTEM_TRAY_BEGIN_MESSAGE   1
 129 #define SYSTEM_TRAY_CANCEL_MESSAGE  2
 130
 131 #define SYSTEM_TRAY_ORIENTATION_HORZ 0
 132 #define SYSTEM_TRAY_ORIENTATION_VERT 1
 133
 134 enum {
 135   PROP_0,
 136   PROP_ORIENTATION
 137 };
 138
 139 static GtkPlugClass *parent_class = NULL;
 140
 141 static void egg_tray_icon_init (EggTrayIcon *icon);
 142 static void egg_tray_icon_class_init (EggTrayIconClass *klass);
 143
 144 static void egg_tray_icon_get_property (GObject    *object,
 145                                         guint       prop_id,
 146                                         GValue     *value,
 147                                         GParamSpec *pspec);
 148
 149 static void egg_tray_icon_realize   (GtkWidget *widget);
 150 static void egg_tray_icon_unrealize (GtkWidget *widget);
 151
 152 static void egg_tray_icon_add (GtkContainer *container,
 153                                GtkWidget    *widget);
 154
 155 #ifdef GDK_WINDOWING_X11
 156 static void egg_tray_icon_update_manager_window    (EggTrayIcon *icon,
 157                                                     gboolean     dock_if_realized);
 158 static void egg_tray_icon_manager_window_destroyed (EggTrayIcon *icon);
 159 #endif
 160
 161 GType
 162 egg_tray_icon_get_type (void)
 163 {
 164   static GType our_type = 0;
 165
 166   if (our_type == 0)
 167     {
 168       static const GTypeInfo our_info =
 169       {
 170         sizeof (EggTrayIconClass),
 171         (GBaseInitFunc) NULL,
 172         (GBaseFinalizeFunc) NULL,
 173         (GClassInitFunc) egg_tray_icon_class_init,
 174         NULL, /* class_finalize */
 175         NULL, /* class_data */
 176         sizeof (EggTrayIcon),
 177         0,    /* n_preallocs */
 178         (GInstanceInitFunc) egg_tray_icon_init
 179       };
 180
 181       our_type = g_type_register_static (GTK_TYPE_PLUG, "EggTrayIcon", &our_info, 0);
 182     }
 183
 184   return our_type;
 185 }
 186
 187 static void
 188 egg_tray_icon_init (EggTrayIcon *icon)
 189 {
 190   icon->stamp = 1;
 191   icon->orientation = GTK_ORIENTATION_HORIZONTAL;
 192
 193   gtk_widget_add_events (GTK_WIDGET (icon), GDK_PROPERTY_CHANGE_MASK);
 194 }
 195
 196 static void
 197 egg_tray_icon_class_init (EggTrayIconClass *klass)
 198 {
 199   GObjectClass *gobject_class = (GObjectClass *)klass;
 200   GtkWidgetClass *widget_class = (GtkWidgetClass *)klass;
 201   GtkContainerClass *container_class = (GtkContainerClass *)klass;
 202
 203   parent_class = g_type_class_peek_parent (klass);
 204
 205   gobject_class->get_property = egg_tray_icon_get_property;
 206
 207   widget_class->realize   = egg_tray_icon_realize;
 208   widget_class->unrealize = egg_tray_icon_unrealize;
 209
 210   container_class->add = egg_tray_icon_add;
 211
 212   g_object_class_install_property (gobject_class,
 213                                    PROP_ORIENTATION,
 214                                    g_param_spec_enum ("orientation",
 215                                                       "Orientation",
 216                                                       "The orientation of the tray.",
 217                                                       GTK_TYPE_ORIENTATION,
 218                                                       GTK_ORIENTATION_HORIZONTAL,
 219                                                       G_PARAM_READABLE));
 220 }
 221
 222 static void
 223 egg_tray_icon_get_property (GObject    *object,
 224                             guint       prop_id,
 225                             GValue     *value,
 226                             GParamSpec *pspec)
 227 {
 228   EggTrayIcon *icon = EGG_TRAY_ICON (object);
 229
 230   switch (prop_id)
 231     {
 232     case PROP_ORIENTATION:
 233       g_value_set_enum (value, icon->orientation);
 234       break;
 235     default:
 236       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 237       break;
 238     }
 239 }
 240
 241 #ifdef GDK_WINDOWING_X11
 242
 243 static void
 244 egg_tray_icon_get_orientation_property (EggTrayIcon *icon)
 245 {
 246   Display *xdisplay;
 247   Atom type;
 248   int format;
 249   union {
 250         gulong *prop;
 251         guchar *prop_ch;
 252   } prop = { NULL };
 253   gulong nitems;
 254   gulong bytes_after;
 255   int error, result;
 256
 257   g_assert (icon->manager_window != None);
 258
 259   xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 260
 261   gdk_error_trap_push ();
 262   type = None;
 263   result = XGetWindowProperty (xdisplay,
 264                                icon->manager_window,
 265                                icon->orientation_atom,
 266                                0, G_MAXLONG, FALSE,
 267                                XA_CARDINAL,
 268                                &type, &format, &nitems,
 269                                &bytes_after, &(prop.prop_ch));
 270   error = gdk_error_trap_pop ();
 271
 272   if (error || result != Success)
 273     return;
 274
 275   if (type == XA_CARDINAL)
 276     {
 277       GtkOrientation orientation;
 278
 279       orientation = (prop.prop [0] == SYSTEM_TRAY_ORIENTATION_HORZ) ?
 280                                         GTK_ORIENTATION_HORIZONTAL :
 281                                         GTK_ORIENTATION_VERTICAL;
 282
 283       if (icon->orientation != orientation)
 284         {
 285           icon->orientation = orientation;
 286
 287           g_object_notify (G_OBJECT (icon), "orientation");
 288         }
 289     }
 290
 291   if (prop.prop)
 292     XFree (prop.prop);
 293 }
 294
 295 static GdkFilterReturn
 296 egg_tray_icon_manager_filter (GdkXEvent *xevent, GdkEvent *event, gpointer user_data)
 297 {
 298   EggTrayIcon *icon = user_data;
 299   XEvent *xev = (XEvent *)xevent;
 300
 301   if (xev->xany.type == ClientMessage &&
 302       xev->xclient.message_type == icon->manager_atom &&
 303       xev->xclient.data.l[1] == icon->selection_atom)
 304     {
 305       egg_tray_icon_update_manager_window (icon, TRUE);
 306     }
 307   else if (xev->xany.window == icon->manager_window)
 308     {
 309       if (xev->xany.type == PropertyNotify &&
 310           xev->xproperty.atom == icon->orientation_atom)
 311         {
 312           egg_tray_icon_get_orientation_property (icon);
 313         }
 314       if (xev->xany.type == DestroyNotify)
 315         {
 316           egg_tray_icon_manager_window_destroyed (icon);
 317         }
 318     }
 319   return GDK_FILTER_CONTINUE;
 320 }
 321
 322 #endif
 323
 324 static void
 325 egg_tray_icon_unrealize (GtkWidget *widget)
 326 {
 327 #ifdef GDK_WINDOWING_X11
 328   EggTrayIcon *icon = EGG_TRAY_ICON (widget);
 329   GdkWindow *root_window;
 330
 331   if (icon->manager_window != None)
 332     {
 333       GdkWindow *gdkwin;
 334
 335       gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (widget),
 336                                               icon->manager_window);
 337
 338       gdk_window_remove_filter (gdkwin, egg_tray_icon_manager_filter, icon);
 339     }
 340
 341   root_window = gdk_screen_get_root_window (gtk_widget_get_screen (widget));
 342
 343   gdk_window_remove_filter (root_window, egg_tray_icon_manager_filter, icon);
 344
 345   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 346     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 347 #endif
 348 }
 349
 350 #ifdef GDK_WINDOWING_X11
 351
 352 static void
 353 egg_tray_icon_send_manager_message (EggTrayIcon *icon,
 354                                     long         message,
 355                                     Window       window,
 356                                     long         data1,
 357                                     long         data2,
 358                                     long         data3)
 359 {
 360   XClientMessageEvent ev;
 361   Display *display;
 362
 363   ev.type = ClientMessage;
 364   ev.window = window;
 365   ev.message_type = icon->system_tray_opcode_atom;
 366   ev.format = 32;
 367   ev.data.l[0] = gdk_x11_get_server_time (GTK_WIDGET (icon)->window);
 368   ev.data.l[1] = message;
 369   ev.data.l[2] = data1;
 370   ev.data.l[3] = data2;
 371   ev.data.l[4] = data3;
 372
 373   display = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 374
 375   gdk_error_trap_push ();
 376   XSendEvent (display,
 377               icon->manager_window, False, NoEventMask, (XEvent *)&ev);
 378   XSync (display, False);
 379   gdk_error_trap_pop ();
 380 }
 381
 382 static void
 383 egg_tray_icon_send_dock_request (EggTrayIcon *icon)
 384 {
 385   egg_tray_icon_send_manager_message (icon,
 386                                       SYSTEM_TRAY_REQUEST_DOCK,
 387                                       icon->manager_window,
 388                                       gtk_plug_get_id (GTK_PLUG (icon)),
 389                                       0, 0);
 390 }
 391
 392 static void
 393 egg_tray_icon_update_manager_window (EggTrayIcon *icon,
 394                                      gboolean     dock_if_realized)
 395 {
 396   Display *xdisplay;
 397
 398   if (icon->manager_window != None)
 399     return;
 400
 401   xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 402
 403   XGrabServer (xdisplay);
 404
 405   icon->manager_window = XGetSelectionOwner (xdisplay,
 406                                              icon->selection_atom);
 407
 408   if (icon->manager_window != None)
 409     XSelectInput (xdisplay,
 410                   icon->manager_window, StructureNotifyMask|PropertyChangeMask);
 411
 412   XUngrabServer (xdisplay);
 413   XFlush (xdisplay);
 414
 415   if (icon->manager_window != None)
 416     {
 417       GdkWindow *gdkwin;
 418
 419       gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (GTK_WIDGET (icon)),
 420                                               icon->manager_window);
 421
 422       gdk_window_add_filter (gdkwin, egg_tray_icon_manager_filter, icon);
 423
 424       if (dock_if_realized && GTK_WIDGET_REALIZED (icon))
 425         egg_tray_icon_send_dock_request (icon);
 426
 427       egg_tray_icon_get_orientation_property (icon);
 428     }
 429 }
 430
 431 static void
 432 egg_tray_icon_manager_window_destroyed (EggTrayIcon *icon)
 433 {
 434   GdkWindow *gdkwin;
 435
 436   g_return_if_fail (icon->manager_window != None);
 437
 438   gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (GTK_WIDGET (icon)),
 439                                           icon->manager_window);
 440
 441   gdk_window_remove_filter (gdkwin, egg_tray_icon_manager_filter, icon);
 442
 443   icon->manager_window = None;
 444
 445   egg_tray_icon_update_manager_window (icon, TRUE);
 446 }
 447
 448 #endif
 449
 450 static gboolean
 451 transparent_expose_event (GtkWidget *widget, GdkEventExpose *event, gpointer user_data)
 452 {
 453   gdk_window_clear_area (widget->window, event->area.x, event->area.y,
 454                          event->area.width, event->area.height);
 455   return FALSE;
 456 }
 457
 458 static void
 459 make_transparent_again (GtkWidget *widget, GtkStyle *previous_style,
 460                         gpointer user_data)
 461 {
 462   gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 463 }
 464
 465 static void
 466 make_transparent (GtkWidget *widget, gpointer user_data)
 467 {
 468   if (GTK_WIDGET_NO_WINDOW (widget) || GTK_WIDGET_APP_PAINTABLE (widget))
 469     return;
 470
 471   gtk_widget_set_app_paintable (widget, TRUE);
 472   gtk_widget_set_double_buffered (widget, FALSE);
 473   gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 474   g_signal_connect (widget, "expose_event",
 475                     G_CALLBACK (transparent_expose_event), NULL);
 476   g_signal_connect_after (widget, "style_set",
 477                           G_CALLBACK (make_transparent_again), NULL);
 478 }
 479
 480 static void
 481 egg_tray_icon_realize (GtkWidget *widget)
 482 {
 483 #ifdef GDK_WINDOWING_X11
 484   EggTrayIcon *icon = EGG_TRAY_ICON (widget);
 485   GdkScreen *screen;
 486   GdkDisplay *display;
 487   Display *xdisplay;
 488   char buffer[256];
 489   GdkWindow *root_window;
 490
 491   if (GTK_WIDGET_CLASS (parent_class)->realize)
 492     GTK_WIDGET_CLASS (parent_class)->realize (widget);
 493
 494   make_transparent (widget, NULL);
 495
 496   screen = gtk_widget_get_screen (widget);
 497   display = gdk_screen_get_display (screen);
 498   xdisplay = gdk_x11_display_get_xdisplay (display);
 499
 500   /* Now see if there's a manager window around */
 501   g_snprintf (buffer, sizeof (buffer),
 502               "_NET_SYSTEM_TRAY_S%d",
 503               gdk_screen_get_number (screen));
 504
 505   icon->selection_atom = XInternAtom (xdisplay, buffer, False);
 506
 507   icon->manager_atom = XInternAtom (xdisplay, "MANAGER", False);
 508
 509   icon->system_tray_opcode_atom = XInternAtom (xdisplay,
 510                                                    "_NET_SYSTEM_TRAY_OPCODE",
 511                                                    False);
 512
 513   icon->orientation_atom = XInternAtom (xdisplay,
 514                                         "_NET_SYSTEM_TRAY_ORIENTATION",
 515                                         False);
 516
 517   egg_tray_icon_update_manager_window (icon, FALSE);
 518   egg_tray_icon_send_dock_request (icon);
 519
 520   root_window = gdk_screen_get_root_window (screen);
 521
 522   /* Add a root window filter so that we get changes on MANAGER */
 523   gdk_window_add_filter (root_window,
 524                          egg_tray_icon_manager_filter, icon);
 525 #endif
 526 }
 527
 528 static void
 529 egg_tray_icon_add (GtkContainer *container, GtkWidget *widget)
 530 {
 531   g_signal_connect (widget, "realize",
 532                     G_CALLBACK (make_transparent), NULL);
 533   GTK_CONTAINER_CLASS (parent_class)->add (container, widget);
 534 }
 535
 536 EggTrayIcon *
 537 egg_tray_icon_new_for_screen (GdkScreen *screen, const char *name)
 538 {
 539   g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
 540
 541   return g_object_new (EGG_TYPE_TRAY_ICON, "screen", screen, "title", name, NULL);
 542 }
 543
 544 EggTrayIcon*
 545 egg_tray_icon_new (const gchar *name)
 546 {
 547   return g_object_new (EGG_TYPE_TRAY_ICON, "title", name, NULL);
 548 }
 549
 550 guint
 551 egg_tray_icon_send_message (EggTrayIcon *icon,
 552                             gint         timeout,
 553                             const gchar *message,
 554                             gint         len)
 555 {
 556   guint stamp;
 557
 558   g_return_val_if_fail (EGG_IS_TRAY_ICON (icon), 0);
 559   g_return_val_if_fail (timeout >= 0, 0);
 560   g_return_val_if_fail (message != NULL, 0);
 561
 562 #ifdef GDK_WINDOWING_X11
 563   if (icon->manager_window == None)
 564     return 0;
 565 #endif
 566
 567   if (len < 0)
 568     len = strlen (message);
 569
 570   stamp = icon->stamp++;
 571
 572 #ifdef GDK_WINDOWING_X11
 573   /* Get ready to send the message */
 574   egg_tray_icon_send_manager_message (icon, SYSTEM_TRAY_BEGIN_MESSAGE,
 575                                       icon->manager_window,
 576                                       timeout, len, stamp);
 577
 578   /* Now to send the actual message */
 579   gdk_error_trap_push ();
 580   while (len > 0)
 581     {
 582       XClientMessageEvent ev;
 583       Display *xdisplay;
 584
 585       xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 586
 587       ev.type = ClientMessage;
 588       ev.window = icon->manager_window;
 589       ev.format = 8;
 590       ev.message_type = XInternAtom (xdisplay,
 591                                      "_NET_SYSTEM_TRAY_MESSAGE_DATA", False);
 592       if (len > 20)
 593         {
 594           memcpy (&ev.data, message, 20);
 595           len -= 20;
 596           message += 20;
 597         }
 598       else
 599         {
 600           memcpy (&ev.data, message, len);
 601           len = 0;
 602         }
 603
 604       XSendEvent (xdisplay,
 605                   icon->manager_window, False, StructureNotifyMask, (XEvent *)&ev);
 606       XSync (xdisplay, False);
 607     }
 608   gdk_error_trap_pop ();
 609 #endif
 610
 611   return stamp;
 612 }
 613
 614 void
 615 egg_tray_icon_cancel_message (EggTrayIcon *icon,
 616                               guint        id)
 617 {
 618   g_return_if_fail (EGG_IS_TRAY_ICON (icon));
 619   g_return_if_fail (id > 0);
 620 #ifdef GDK_WINDOWING_X11
 621   egg_tray_icon_send_manager_message (icon, SYSTEM_TRAY_CANCEL_MESSAGE,
 622                                       (Window)gtk_plug_get_id (GTK_PLUG (icon)),
 623                                       id, 0, 0);
 624 #endif
 625 }
 626
 627 GtkOrientation
 628 egg_tray_icon_get_orientation (EggTrayIcon *icon)
 629 {
 630   g_return_val_if_fail (EGG_IS_TRAY_ICON (icon), GTK_ORIENTATION_HORIZONTAL);
 631
 632   return icon->orientation;
 633 }
 634
 635
 636
 637
 638
 639 #endif /* GTK_CHECK_VERSION(2, 1, 0) */
 640 #endif /* wxUSE_TASKBARICON */