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 license 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 #include "wx/platform.h"
 108
 109 #ifdef __WXGTK20__
 110 #include <gtk/gtkversion.h>
 111 #if GTK_CHECK_VERSION(2, 1, 0)
 112
 113 #include <string.h>
 114 #include "eggtrayicon.h"
 115
 116 #include <gdkconfig.h>
 117 #if defined (GDK_WINDOWING_X11)
 118 #include <gdk/gdkx.h>
 119 #include <X11/Xatom.h>
 120 #elif defined (GDK_WINDOWING_WIN32)
 121 #include <gdk/gdkwin32.h>
 122 #endif
 123
 124
 125 #define SYSTEM_TRAY_REQUEST_DOCK    0
 126 #define SYSTEM_TRAY_BEGIN_MESSAGE   1
 127 #define SYSTEM_TRAY_CANCEL_MESSAGE  2
 128
 129 #define SYSTEM_TRAY_ORIENTATION_HORZ 0
 130 #define SYSTEM_TRAY_ORIENTATION_VERT 1
 131
 132 enum {
 133   PROP_0,
 134   PROP_ORIENTATION
 135 };
 136
 137 static GtkPlugClass *parent_class = NULL;
 138
 139 static void egg_tray_icon_init (EggTrayIcon *icon);
 140 static void egg_tray_icon_class_init (EggTrayIconClass *klass);
 141
 142 static void egg_tray_icon_get_property (GObject    *object,
 143                                         guint       prop_id,
 144                                         GValue     *value,
 145                                         GParamSpec *pspec);
 146
 147 static void egg_tray_icon_realize   (GtkWidget *widget);
 148 static void egg_tray_icon_unrealize (GtkWidget *widget);
 149
 150 static void egg_tray_icon_add (GtkContainer *container,
 151                                GtkWidget    *widget);
 152
 153 #ifdef GDK_WINDOWING_X11
 154 static void egg_tray_icon_update_manager_window    (EggTrayIcon *icon,
 155                                                     gboolean     dock_if_realized);
 156 static void egg_tray_icon_manager_window_destroyed (EggTrayIcon *icon);
 157 #endif
 158
 159 GType
 160 egg_tray_icon_get_type (void)
 161 {
 162   static GType our_type = 0;
 163
 164   if (our_type == 0)
 165     {
 166       static const GTypeInfo our_info =
 167       {
 168         sizeof (EggTrayIconClass),
 169         (GBaseInitFunc) NULL,
 170         (GBaseFinalizeFunc) NULL,
 171         (GClassInitFunc) egg_tray_icon_class_init,
 172         NULL, /* class_finalize */
 173         NULL, /* class_data */
 174         sizeof (EggTrayIcon),
 175         0,    /* n_preallocs */
 176         (GInstanceInitFunc) egg_tray_icon_init
 177       };
 178
 179       our_type = g_type_register_static (GTK_TYPE_PLUG, "EggTrayIcon", &our_info, 0);
 180     }
 181
 182   return our_type;
 183 }
 184
 185 static void
 186 egg_tray_icon_init (EggTrayIcon *icon)
 187 {
 188   icon->stamp = 1;
 189   icon->orientation = GTK_ORIENTATION_HORIZONTAL;
 190
 191   gtk_widget_add_events (GTK_WIDGET (icon), GDK_PROPERTY_CHANGE_MASK);
 192 }
 193
 194 static void
 195 egg_tray_icon_class_init (EggTrayIconClass *klass)
 196 {
 197   GObjectClass *gobject_class = (GObjectClass *)klass;
 198   GtkWidgetClass *widget_class = (GtkWidgetClass *)klass;
 199   GtkContainerClass *container_class = (GtkContainerClass *)klass;
 200
 201   parent_class = g_type_class_peek_parent (klass);
 202
 203   gobject_class->get_property = egg_tray_icon_get_property;
 204
 205   widget_class->realize   = egg_tray_icon_realize;
 206   widget_class->unrealize = egg_tray_icon_unrealize;
 207
 208   container_class->add = egg_tray_icon_add;
 209
 210   g_object_class_install_property (gobject_class,
 211                                    PROP_ORIENTATION,
 212                                    g_param_spec_enum ("orientation",
 213                                                       "Orientation",
 214                                                       "The orientation of the tray.",
 215                                                       GTK_TYPE_ORIENTATION,
 216                                                       GTK_ORIENTATION_HORIZONTAL,
 217                                                       G_PARAM_READABLE));
 218 }
 219
 220 static void
 221 egg_tray_icon_get_property (GObject    *object,
 222                             guint       prop_id,
 223                             GValue     *value,
 224                             GParamSpec *pspec)
 225 {
 226   EggTrayIcon *icon = EGG_TRAY_ICON (object);
 227
 228   switch (prop_id)
 229     {
 230     case PROP_ORIENTATION:
 231       g_value_set_enum (value, icon->orientation);
 232       break;
 233     default:
 234       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 235       break;
 236     }
 237 }
 238
 239 #ifdef GDK_WINDOWING_X11
 240
 241 static void
 242 egg_tray_icon_get_orientation_property (EggTrayIcon *icon)
 243 {
 244   Display *xdisplay;
 245   Atom type;
 246   int format;
 247   union {
 248         gulong *prop;
 249         guchar *prop_ch;
 250   } prop = { NULL };
 251   gulong nitems;
 252   gulong bytes_after;
 253   int error, result;
 254
 255   g_assert (icon->manager_window != None);
 256
 257   xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 258
 259   gdk_error_trap_push ();
 260   type = None;
 261   result = XGetWindowProperty (xdisplay,
 262                                icon->manager_window,
 263                                icon->orientation_atom,
 264                                0, G_MAXLONG, FALSE,
 265                                XA_CARDINAL,
 266                                &type, &format, &nitems,
 267                                &bytes_after, &(prop.prop_ch));
 268   error = gdk_error_trap_pop ();
 269
 270   if (error || result != Success)
 271     return;
 272
 273   if (type == XA_CARDINAL)
 274     {
 275       GtkOrientation orientation;
 276
 277       orientation = (prop.prop [0] == SYSTEM_TRAY_ORIENTATION_HORZ) ?
 278                                         GTK_ORIENTATION_HORIZONTAL :
 279                                         GTK_ORIENTATION_VERTICAL;
 280
 281       if (icon->orientation != orientation)
 282         {
 283           icon->orientation = orientation;
 284
 285           g_object_notify (G_OBJECT (icon), "orientation");
 286         }
 287     }
 288
 289   if (prop.prop)
 290     XFree (prop.prop);
 291 }
 292
 293 static GdkFilterReturn
 294 egg_tray_icon_manager_filter (GdkXEvent *xevent, GdkEvent *event, gpointer user_data)
 295 {
 296   EggTrayIcon *icon = user_data;
 297   XEvent *xev = (XEvent *)xevent;
 298
 299   if (xev->xany.type == ClientMessage &&
 300       xev->xclient.message_type == icon->manager_atom &&
 301       xev->xclient.data.l[1] == icon->selection_atom)
 302     {
 303       egg_tray_icon_update_manager_window (icon, TRUE);
 304     }
 305   else if (xev->xany.window == icon->manager_window)
 306     {
 307       if (xev->xany.type == PropertyNotify &&
 308           xev->xproperty.atom == icon->orientation_atom)
 309         {
 310           egg_tray_icon_get_orientation_property (icon);
 311         }
 312       if (xev->xany.type == DestroyNotify)
 313         {
 314           egg_tray_icon_manager_window_destroyed (icon);
 315         }
 316     }
 317   return GDK_FILTER_CONTINUE;
 318 }
 319
 320 #endif
 321
 322 static void
 323 egg_tray_icon_unrealize (GtkWidget *widget)
 324 {
 325 #ifdef GDK_WINDOWING_X11
 326   EggTrayIcon *icon = EGG_TRAY_ICON (widget);
 327   GdkWindow *root_window;
 328
 329   if (icon->manager_window != None)
 330     {
 331       GdkWindow *gdkwin;
 332
 333       gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (widget),
 334                                               icon->manager_window);
 335
 336       gdk_window_remove_filter (gdkwin, egg_tray_icon_manager_filter, icon);
 337     }
 338
 339   root_window = gdk_screen_get_root_window (gtk_widget_get_screen (widget));
 340
 341   gdk_window_remove_filter (root_window, egg_tray_icon_manager_filter, icon);
 342
 343   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 344     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 345 #endif
 346 }
 347
 348 #ifdef GDK_WINDOWING_X11
 349
 350 static void
 351 egg_tray_icon_send_manager_message (EggTrayIcon *icon,
 352                                     long         message,
 353                                     Window       window,
 354                                     long         data1,
 355                                     long         data2,
 356                                     long         data3)
 357 {
 358   XClientMessageEvent ev;
 359   Display *display;
 360
 361   ev.type = ClientMessage;
 362   ev.window = window;
 363   ev.message_type = icon->system_tray_opcode_atom;
 364   ev.format = 32;
 365   ev.data.l[0] = gdk_x11_get_server_time (GTK_WIDGET (icon)->window);
 366   ev.data.l[1] = message;
 367   ev.data.l[2] = data1;
 368   ev.data.l[3] = data2;
 369   ev.data.l[4] = data3;
 370
 371   display = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 372
 373   gdk_error_trap_push ();
 374   XSendEvent (display,
 375               icon->manager_window, False, NoEventMask, (XEvent *)&ev);
 376   XSync (display, False);
 377   gdk_error_trap_pop ();
 378 }
 379
 380 static void
 381 egg_tray_icon_send_dock_request (EggTrayIcon *icon)
 382 {
 383   egg_tray_icon_send_manager_message (icon,
 384                                       SYSTEM_TRAY_REQUEST_DOCK,
 385                                       icon->manager_window,
 386                                       gtk_plug_get_id (GTK_PLUG (icon)),
 387                                       0, 0);
 388 }
 389
 390 static void
 391 egg_tray_icon_update_manager_window (EggTrayIcon *icon,
 392                                      gboolean     dock_if_realized)
 393 {
 394   Display *xdisplay;
 395
 396   if (icon->manager_window != None)
 397     return;
 398
 399   xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 400
 401   XGrabServer (xdisplay);
 402
 403   icon->manager_window = XGetSelectionOwner (xdisplay,
 404                                              icon->selection_atom);
 405
 406   if (icon->manager_window != None)
 407     XSelectInput (xdisplay,
 408                   icon->manager_window, StructureNotifyMask|PropertyChangeMask);
 409
 410   XUngrabServer (xdisplay);
 411   XFlush (xdisplay);
 412
 413   if (icon->manager_window != None)
 414     {
 415       GdkWindow *gdkwin;
 416
 417       gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (GTK_WIDGET (icon)),
 418                                               icon->manager_window);
 419
 420       gdk_window_add_filter (gdkwin, egg_tray_icon_manager_filter, icon);
 421
 422       if (dock_if_realized && GTK_WIDGET_REALIZED (icon))
 423         egg_tray_icon_send_dock_request (icon);
 424
 425       egg_tray_icon_get_orientation_property (icon);
 426     }
 427 }
 428
 429 static void
 430 egg_tray_icon_manager_window_destroyed (EggTrayIcon *icon)
 431 {
 432   GdkWindow *gdkwin;
 433
 434   g_return_if_fail (icon->manager_window != None);
 435
 436   gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (GTK_WIDGET (icon)),
 437                                           icon->manager_window);
 438
 439   gdk_window_remove_filter (gdkwin, egg_tray_icon_manager_filter, icon);
 440
 441   icon->manager_window = None;
 442
 443   egg_tray_icon_update_manager_window (icon, TRUE);
 444 }
 445
 446 #endif
 447
 448 static gboolean
 449 transparent_expose_event (GtkWidget *widget, GdkEventExpose *event, gpointer user_data)
 450 {
 451   gdk_window_clear_area (widget->window, event->area.x, event->area.y,
 452                          event->area.width, event->area.height);
 453   return FALSE;
 454 }
 455
 456 static void
 457 make_transparent_again (GtkWidget *widget, GtkStyle *previous_style,
 458                         gpointer user_data)
 459 {
 460   gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 461 }
 462
 463 static void
 464 make_transparent (GtkWidget *widget, gpointer user_data)
 465 {
 466   if (GTK_WIDGET_NO_WINDOW (widget) || GTK_WIDGET_APP_PAINTABLE (widget))
 467     return;
 468
 469   gtk_widget_set_app_paintable (widget, TRUE);
 470   gtk_widget_set_double_buffered (widget, FALSE);
 471   gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 472   g_signal_connect (widget, "expose_event",
 473                     G_CALLBACK (transparent_expose_event), NULL);
 474   g_signal_connect_after (widget, "style_set",
 475                           G_CALLBACK (make_transparent_again), NULL);
 476 }
 477
 478 static void
 479 egg_tray_icon_realize (GtkWidget *widget)
 480 {
 481 #ifdef GDK_WINDOWING_X11
 482   EggTrayIcon *icon = EGG_TRAY_ICON (widget);
 483   GdkScreen *screen;
 484   GdkDisplay *display;
 485   Display *xdisplay;
 486   char buffer[256];
 487   GdkWindow *root_window;
 488
 489   if (GTK_WIDGET_CLASS (parent_class)->realize)
 490     GTK_WIDGET_CLASS (parent_class)->realize (widget);
 491
 492   make_transparent (widget, NULL);
 493
 494   screen = gtk_widget_get_screen (widget);
 495   display = gdk_screen_get_display (screen);
 496   xdisplay = gdk_x11_display_get_xdisplay (display);
 497
 498   /* Now see if there's a manager window around */
 499   g_snprintf (buffer, sizeof (buffer),
 500               "_NET_SYSTEM_TRAY_S%d",
 501               gdk_screen_get_number (screen));
 502
 503   icon->selection_atom = XInternAtom (xdisplay, buffer, False);
 504
 505   icon->manager_atom = XInternAtom (xdisplay, "MANAGER", False);
 506
 507   icon->system_tray_opcode_atom = XInternAtom (xdisplay,
 508                                                    "_NET_SYSTEM_TRAY_OPCODE",
 509                                                    False);
 510
 511   icon->orientation_atom = XInternAtom (xdisplay,
 512                                         "_NET_SYSTEM_TRAY_ORIENTATION",
 513                                         False);
 514
 515   egg_tray_icon_update_manager_window (icon, FALSE);
 516   egg_tray_icon_send_dock_request (icon);
 517
 518   root_window = gdk_screen_get_root_window (screen);
 519
 520   /* Add a root window filter so that we get changes on MANAGER */
 521   gdk_window_add_filter (root_window,
 522                          egg_tray_icon_manager_filter, icon);
 523 #endif
 524 }
 525
 526 static void
 527 egg_tray_icon_add (GtkContainer *container, GtkWidget *widget)
 528 {
 529   g_signal_connect (widget, "realize",
 530                     G_CALLBACK (make_transparent), NULL);
 531   GTK_CONTAINER_CLASS (parent_class)->add (container, widget);
 532 }
 533
 534 EggTrayIcon *
 535 egg_tray_icon_new_for_screen (GdkScreen *screen, const char *name)
 536 {
 537   g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
 538
 539   return g_object_new (EGG_TYPE_TRAY_ICON, "screen", screen, "title", name, NULL);
 540 }
 541
 542 EggTrayIcon*
 543 egg_tray_icon_new (const gchar *name)
 544 {
 545   return g_object_new (EGG_TYPE_TRAY_ICON, "title", name, NULL);
 546 }
 547
 548 guint
 549 egg_tray_icon_send_message (EggTrayIcon *icon,
 550                             gint         timeout,
 551                             const gchar *message,
 552                             gint         len)
 553 {
 554   guint stamp;
 555
 556   g_return_val_if_fail (EGG_IS_TRAY_ICON (icon), 0);
 557   g_return_val_if_fail (timeout >= 0, 0);
 558   g_return_val_if_fail (message != NULL, 0);
 559
 560 #ifdef GDK_WINDOWING_X11
 561   if (icon->manager_window == None)
 562     return 0;
 563 #endif
 564
 565   if (len < 0)
 566     len = strlen (message);
 567
 568   stamp = icon->stamp++;
 569
 570 #ifdef GDK_WINDOWING_X11
 571   /* Get ready to send the message */
 572   egg_tray_icon_send_manager_message (icon, SYSTEM_TRAY_BEGIN_MESSAGE,
 573                                       icon->manager_window,
 574                                       timeout, len, stamp);
 575
 576   /* Now to send the actual message */
 577   gdk_error_trap_push ();
 578   while (len > 0)
 579     {
 580       XClientMessageEvent ev;
 581       Display *xdisplay;
 582
 583       xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 584
 585       ev.type = ClientMessage;
 586       ev.window = icon->manager_window;
 587       ev.format = 8;
 588       ev.message_type = XInternAtom (xdisplay,
 589                                      "_NET_SYSTEM_TRAY_MESSAGE_DATA", False);
 590       if (len > 20)
 591         {
 592           memcpy (&ev.data, message, 20);
 593           len -= 20;
 594           message += 20;
 595         }
 596       else
 597         {
 598           memcpy (&ev.data, message, len);
 599           len = 0;
 600         }
 601
 602       XSendEvent (xdisplay,
 603                   icon->manager_window, False, StructureNotifyMask, (XEvent *)&ev);
 604       XSync (xdisplay, False);
 605     }
 606   gdk_error_trap_pop ();
 607 #endif
 608
 609   return stamp;
 610 }
 611
 612 void
 613 egg_tray_icon_cancel_message (EggTrayIcon *icon,
 614                               guint        id)
 615 {
 616   g_return_if_fail (EGG_IS_TRAY_ICON (icon));
 617   g_return_if_fail (id > 0);
 618 #ifdef GDK_WINDOWING_X11
 619   egg_tray_icon_send_manager_message (icon, SYSTEM_TRAY_CANCEL_MESSAGE,
 620                                       (Window)gtk_plug_get_id (GTK_PLUG (icon)),
 621                                       id, 0, 0);
 622 #endif
 623 }
 624
 625 GtkOrientation
 626 egg_tray_icon_get_orientation (EggTrayIcon *icon)
 627 {
 628   g_return_val_if_fail (EGG_IS_TRAY_ICON (icon), GTK_ORIENTATION_HORIZONTAL);
 629
 630   return icon->orientation;
 631 }
 632
 633
 634
 635
 636
 637 #endif /* __WXGTK20__ */
 638 #endif /* GTK_CHECK_VERSION(2, 1, 0) */