File: gtk2trayicon.inc

package info (click to toggle)
lazarus 4.0%2Bdfsg-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 275,760 kB
  • sloc: pascal: 2,341,904; xml: 509,420; makefile: 348,726; cpp: 93,608; sh: 3,387; java: 609; perl: 297; sql: 222; ansic: 137
file content (601 lines) | stat: -rw-r--r-- 18,285 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
{%MainUnit gtk2wsextctrls.pp}
{
 gtk2trayicon.inc

 *****************************************************************************
  This file is part of the Lazarus Component Library (LCL)

  See the file COPYING.modifiedLGPL.txt, included in this distribution,
  for details about the license.
 *****************************************************************************

 Authors: Felipe Monteiro de Carvalho and Andrew Haines

 Special thanks for: Danny Milosavljevic and the Lazarus Team

 Gtk2 specific code.
}

{ TGtk2WSCustomTrayIcon }

type
  { TGtk2TrayIconHandle }

  TGtk2TrayIconHandle = class
  private
    plug: PGtkWidget;
    DrawingArea: PGtkWidget;
    Tips: PGtkTooltips;
    fEmbedded: Boolean;
    fTrayIcon: TCustomTrayIcon;
{$ifdef UseStatusIcon}
    FStatusIcon: PGtkStatusIcon;
{$endif}
{$ifdef HasGdk2X}
    fDisplay: PDisplay;
    fWindow: TWindow;
    fScreen: PScreen;
    fScreenID: longint;
    fTrayParent: TWindow;
    function SendMessage(window: TWindow; msg: Integer; data1, data2, data3: Integer): Boolean;
    procedure SetEmbedded;
{$endif HasGdk2X}
  public
    constructor Create(const wsTrayIcon: TCustomTrayIcon);
    destructor Destroy; override;
    procedure Show;
    function GetPosition: TPoint;
    procedure Update(NewPixBuf: PGdkPixbuf; const NewHint: String);
  end;

const
  SYSTEM_TRAY_REQUEST_DOCK   = 0;
  //SYSTEM_TRAY_BEGIN_MESSAGE  = 1;
  //SYSTEM_TRAY_CANCEL_MESSAGE = 2;

{$ifdef HasGdk2X}
var
  XError: Integer;
{*******************************************************************
*  TempX11ErrorHandler ()
*
*  DESCRIPTION:    Temp ErrorHandler
*
*  PARAMETERS:     ?
*
*  RETURNS:        ?
*
*******************************************************************}
function TempX11ErrorHandler({%H-}Display:PDisplay; ErrorEv:PXErrorEvent):longint;cdecl;
begin
  XError := ErrorEv^.error_code;
  WriteLn('Error: ' + IntToStr(XError));
  Result:=0;
end;

{*******************************************************************
*  TGtk2TrayIconHandle.Send_Message ()
*
*  DESCRIPTION:    Sends a message to the X client
*
*  PARAMETERS:     None
*
*  RETURNS:        Nothing
*
*******************************************************************}
function TGtk2TrayIconHandle.SendMessage(window: TWindow; msg: Integer; data1, data2, data3: Integer): Boolean;
var
  Ev: TXEvent;
begin
  FillChar(Ev{%H-}, SizeOf(TXEvent), 0);

  ev.xclient._type := ClientMessage;
  ev.xclient.window := window;
  ev.xclient.message_type := XInternAtom (fDisplay, '_NET_SYSTEM_TRAY_OPCODE', False);
  ev.xclient.format := 32;
  ev.xclient.data.l[0] := CurrentTime;
  ev.xclient.data.l[1] := msg;
  ev.xclient.data.l[2] := data1;
  ev.xclient.data.l[3] := data2;
  ev.xclient.data.l[4] := data3;

  XError := 0;
  XSendEvent(fDisplay, fTrayParent, False, NoEventMask, @ev);
  XSync(fDisplay, False);
  Result := XError = 0;
  XError := 0;
end;

{*******************************************************************
*  TGtk2TrayIconHandle.SetEmbedded ()
*
*  DESCRIPTION:    Docks the GtkPlug into the system tray
*
*  PARAMETERS:     None
*
*  RETURNS:        Nothing
*
*******************************************************************}
procedure TGtk2TrayIconHandle.SetEmbedded;
var
  old_error: TXErrorHandler;
  buf: array [0..32] of char;
  selection_atom : TAtom;
begin
  if fEmbedded then
    Exit;
  old_error := XSetErrorHandler(@TempX11ErrorHandler);

  xsync(fdisplay,true);
  buf :=  PChar('_NET_SYSTEM_TRAY_S' + IntToStr(fScreenID));
  selection_atom := XInternAtom(fDisplay, buf, false);
  XGrabServer(fDisplay);

  fTrayParent := XGetSelectionOwner(fDisplay, selection_atom);
  if fTrayParent <> None then
  begin
    XSelectInput(fDisplay, fTrayParent, StructureNotifyMask);
  end;

  XUngrabServer(fDisplay);
  XFlush(fDisplay);
  if fTrayParent <> None then
    fEmbedded := SendMessage(fTrayParent, SYSTEM_TRAY_REQUEST_DOCK, fWindow, 0, 0);

  XSetErrorHandler(old_error);
end;
{$endif HasGdk2X}

{*******************************************************************
*  realize_cb ()
*
*  DESCRIPTION:    Callback function for the realize signal
*                  Sets the systray icon after the widget is realized
*
*  PARAMETERS:     None
*
*  RETURNS:        Nothing
*
*******************************************************************}
procedure realize_cb({%H-}widget: PGtkWidget; user_data: gpointer); cdecl;
var
  wsTrayIcon: TCustomTrayIcon absolute user_data;
begin
  with TGtk2TrayIconHandle(wsTrayIcon.Handle) do
  begin
    {$ifdef HasGdk2X}
    fDisplay := GDK_WINDOW_XDISPLAY(plug^.window);
    fWindow := GDK_WINDOW_XWINDOW(plug^.window);

{  Does not work

    gdk_screen := gtk_widget_get_screen(plug);
    fScreen := GDK_SCREEN_XSCREEN(gdk_screen); // get the real screen}

    fScreen := XDefaultScreenOfDisplay(fDisplay);
    fScreenID := XScreenNumberOfScreen(fScreen); // and it's number
    SetEmbedded;
    {$endif}
  end;
end;

{*******************************************************************
*  button_release_cb ()
*
*  DESCRIPTION:    Callback function for Mouse Click
*
*  PARAMETERS:     None
*
*  RETURNS:        Nothing
*
*******************************************************************}
function button_release_cb({%H-}widget: PGtkWidget; event: PGdkEventButton;
 user_data: gpointer): gboolean; cdecl;
var
  vwsTrayIcon: TCustomTrayIcon absolute user_data;
begin
  Result := False;
  
  case event^.button of
    1:
    begin
      if Assigned(vwsTrayIcon.OnClick) then vwsTrayIcon.OnClick(vwsTrayIcon);
      if Assigned(vwsTrayIcon.OnMouseUp) then
       vwsTrayIcon.OnMouseUp(vwsTrayIcon, mbLeft, [], Round(event^.X), Round(event^.Y));
    end;
    
    2: if Assigned(vwsTrayIcon.OnMouseUp) then
        vwsTrayIcon.OnMouseUp(vwsTrayIcon, mbMiddle, [], Round(event^.X), Round(event^.Y));

    3:
    begin
      if Assigned(vwsTrayIcon.OnMouseUp) then
       vwsTrayIcon.OnMouseUp(vwsTrayIcon, mbRight, [], Round(event^.X), Round(event^.Y));
      if Assigned(vwsTrayIcon.PopUpMenu) then
       vwsTrayIcon.PopUpMenu.PopUp(Mouse.CursorPos.X, Mouse.CursorPos.Y);
     end;
  end;
end;

{*******************************************************************
*  button_press_cb ()
*
*  DESCRIPTION:    Callback function for Mouse Click
*
*  PARAMETERS:     None
*
*  RETURNS:        Nothing
*
*******************************************************************}
function button_press_cb({%H-}widget: PGtkWidget; event: PGdkEventButton;
 user_data: gpointer): gboolean; cdecl;
var
  vwsTrayIcon: TCustomTrayIcon absolute user_data;
begin
  Result := False;

  if (event^._type = GDK_2BUTTON_PRESS) and Assigned(vwsTrayIcon.OnDblClick) then
   vwsTrayIcon.OnDblClick(vwsTrayIcon)
  else
  begin
    case event^.button of
      1: if Assigned(vwsTrayIcon.OnMouseDown) then
          vwsTrayIcon.OnMouseDown(vwsTrayIcon, mbLeft, [], Round(event^.X), Round(event^.Y));

      2: if Assigned(vwsTrayIcon.OnMouseDown) then
          vwsTrayIcon.OnMouseDown(vwsTrayIcon, mbMiddle, [], Round(event^.X), Round(event^.Y));

      3: if Assigned(vwsTrayIcon.OnMouseDown) then
          vwsTrayIcon.OnMouseDown(vwsTrayIcon, mbRight, [], Round(event^.X), Round(event^.Y));
    end;
  end;
end;

{*******************************************************************
*  popup_cb ()
*
*  DESCRIPTION:    Callback function for the popup menu
*
*  PARAMETERS:     None
*
*  RETURNS:        Nothing
*
*******************************************************************}
function popup_cb({%H-}widget: PGtkWidget; user_data: gpointer): Boolean; cdecl;
var
  vwsTrayIcon: TCustomTrayIcon absolute user_data;
begin
  Result := True;

  if Assigned(vwsTrayIcon.PopUpMenu) then
    vwsTrayIcon.PopUpMenu.PopUp(Mouse.CursorPos.X, Mouse.CursorPos.Y);
end;

{*******************************************************************
*  motion_cb ()
*
*  DESCRIPTION:    Callback function for the OnMouseMove event
*
*  PARAMETERS:     None
*
*  RETURNS:        Nothing
*
*******************************************************************}
function motion_cb({%H-}widget: PGtkWidget; event: PGdkEventMotion; user_data: gpointer): Boolean; cdecl;
var
  vwsTrayIcon: TCustomTrayIcon absolute user_data;
begin
  Result := False;

  if Assigned(vwsTrayIcon.OnMouseMove) then
   vwsTrayIcon.OnMouseMove(vwsTrayIcon, [], Round(event^.X), Round(event^.Y));
end;

{$ifdef UseStatusIcon}
procedure activate_cb_statusicon({%H-}status_icon: PGtkStatusIcon; user_data: gpointer); cdecl;
var
  vwsTrayIcon: TCustomTrayIcon absolute user_data;
begin
  if Assigned(vwsTrayIcon.OnMouseDown) then
    with Mouse.CursorPos do
      vwsTrayIcon.OnMouseDown(vwsTrayIcon, mbLeft, [], X, Y);
end;

procedure popup_cb_statusicon({%H-}status_icon: PGtkStatusIcon; {%H-}button: guint;
                {%H-}activate_time: guint; user_data: gpointer); cdecl;
var
  vwsTrayIcon: TCustomTrayIcon absolute user_data;
begin
  if Assigned(vwsTrayIcon.PopUpMenu) then
    vwsTrayIcon.PopUpMenu.PopUp(Mouse.CursorPos.X, Mouse.CursorPos.Y);
end;

function button_press_cb_statusicon({%H-}status_icon: PGtkStatusIcon;
  event: PGdkEvent; user_data: gpointer): gboolean; cdecl;
var
  vwsTrayIcon: TCustomTrayIcon absolute user_data;
begin
  Result := False;

  if (PGdkEventButton(event)^._type = GDK_2BUTTON_PRESS) and Assigned(vwsTrayIcon.OnDblClick) then
   vwsTrayIcon.OnDblClick(vwsTrayIcon)
  else
  begin
    case PGdkEventButton(event)^.button of
      1: if Assigned(vwsTrayIcon.OnMouseDown) then
          vwsTrayIcon.OnMouseDown(vwsTrayIcon, mbLeft, [], Round(PGdkEventButton(event)^.X), Round(PGdkEventButton(event)^.Y));

      2: if Assigned(vwsTrayIcon.OnMouseDown) then
          vwsTrayIcon.OnMouseDown(vwsTrayIcon, mbMiddle, [], Round(PGdkEventButton(event)^.X), Round(PGdkEventButton(event)^.Y));

      3: if Assigned(vwsTrayIcon.OnMouseDown) then
          vwsTrayIcon.OnMouseDown(vwsTrayIcon, mbRight, [], Round(PGdkEventButton(event)^.X), Round(PGdkEventButton(event)^.Y));
    end;
  end;
end;

function button_release_cb_statusicon({%H-}status_icon: PGtkStatusIcon;
  event: PGdkEvent; user_data: gpointer): gboolean; cdecl;
var
  vwsTrayIcon: TCustomTrayIcon absolute user_data;
begin
  Result := False;
  case PGdkEventButton(event)^.button of
    1:
    begin
      if Assigned(vwsTrayIcon.OnClick) then vwsTrayIcon.OnClick(vwsTrayIcon);
      if Assigned(vwsTrayIcon.OnMouseUp) then
       vwsTrayIcon.OnMouseUp(vwsTrayIcon, mbLeft, [], Round(PGdkEventButton(event)^.X), Round(PGdkEventButton(event)^.Y));
    end;
    
    2: if Assigned(vwsTrayIcon.OnMouseUp) then
        vwsTrayIcon.OnMouseUp(vwsTrayIcon, mbMiddle, [], Round(PGdkEventButton(event)^.X), Round(PGdkEventButton(event)^.Y));

    3:
    begin
      if Assigned(vwsTrayIcon.OnMouseUp) then
       vwsTrayIcon.OnMouseUp(vwsTrayIcon, mbRight, [], Round(PGdkEventButton(event)^.X), Round(PGdkEventButton(event)^.Y));
      if Assigned(vwsTrayIcon.PopUpMenu) then
       vwsTrayIcon.PopUpMenu.PopUp(Mouse.CursorPos.X, Mouse.CursorPos.Y);
     end;
  end;
end;

function query_tooltip_cb_statusicon({%H-}status_icon: PGtkStatusIcon;
  x: guint; y: guint; {%H-}keyboard_mode: gboolean; {%H-}tooltip: gpointer{PGtkTooltip}; user_data: gpointer): gboolean; cdecl;
var
  vwsTrayIcon: TCustomTrayIcon absolute user_data;
begin
  Result := FALSE;

  if Assigned(vwsTrayIcon.OnMouseMove) then
   vwsTrayIcon.OnMouseMove(vwsTrayIcon, [], x, y);
end;
{$endif}

constructor TGtk2TrayIconHandle.Create(const wsTrayIcon: TCustomTrayIcon);
begin
  fTrayIcon := wsTrayIcon;

{$ifdef UseStatusIcon}
  FStatusIcon := nil;
  if Available_GtkStatusIcon_2_10 then
  begin
    FStatusIcon := gtk_status_icon_new();
    gtk_status_icon_set_from_pixbuf(FStatusIcon, {%H-}PGdkPixbuf(FTrayIcon.Icon.Handle));
    {$IF FPC_FULLVERSION>30300}
    gtk_status_icon_set_tooltip_text(FStatusIcon, PChar(FTrayIcon.Hint));
    {$ELSE}
    gtk_status_icon_set_tooltip(FStatusIcon, PChar(FTrayIcon.Hint));
    {$ENDIF}
    g_object_set(PGObject(FStatusIcon), 'has-tooltip', gTRUE, nil);
    fEmbedded := gtk_status_icon_is_embedded(FStatusIcon);

    g_signal_connect(FStatusIcon, 'activate', TGCallback(@activate_cb_statusicon), fTrayIcon);
    g_signal_connect(FStatusIcon, 'popup-menu', TGCallback(@popup_cb_statusicon), fTrayIcon);
    g_signal_connect(FStatusIcon, 'button-press-event', TGCallback(@button_press_cb_statusicon), fTrayIcon);
    g_signal_connect(FStatusIcon, 'button-release-event', TGCallback(@button_release_cb_statusicon), fTrayIcon);
    g_signal_connect(FStatusIcon, 'query-tooltip', TGCallback(@query_tooltip_cb_statusicon), fTrayIcon);
  end
  else
{$endif}
  begin
    //  Creates the GtkPlug
    plug := gtk_plug_new(0);
    Tips := gtk_tooltips_new;
    g_object_ref(Tips);
    gtk_object_sink(GTK_OBJECT(Tips));
    gtk_tooltips_set_tip(GTK_TOOLTIPS(Tips), plug, PChar(wsTrayIcon.Hint), '');

    //  Connects the signals
    gtk_widget_add_events(plug, GDK_ALL_EVENTS_MASK);
    g_signal_connect(plug, 'realize', TGCallback(@realize_cb), wsTrayIcon);
    g_signal_connect(plug, 'popup-menu', TGCallback(@popup_cb), wsTrayIcon);
    g_signal_connect(plug, 'motion-notify-event', TGCallback(@motion_cb), wsTrayIcon);
    g_signal_connect(plug, 'button-press-event', TGCallback(@button_press_cb), wsTrayIcon);
    g_signal_connect(plug, 'button-release-event', TGCallback(@button_release_cb), wsTrayIcon);

    //  Draws the icon
    with wsTrayIcon do
    begin
      DrawingArea := gtk_image_new_from_pixbuf({%H-}PGdkPixbuf(Icon.Handle));
      gtk_container_add(GTK_CONTAINER(plug), DrawingArea);
      gtk_widget_show(DrawingArea);
    end;
  end;
end;

destructor TGtk2TrayIconHandle.Destroy;
begin
{$ifdef UseStatusIcon}
  if FStatusIcon <> nil then
  begin
    gtk_status_icon_set_visible(FStatusIcon, False);
    g_object_unref(FStatusIcon);
    FStatusIcon := nil;
  end
  else
{$endif}
  begin
    gtk_widget_destroy(plug);
    plug := nil;

    g_object_unref(Tips);
    Tips := nil;
  end;
end;

procedure TGtk2TrayIconHandle.Show;
begin
{$ifdef UseStatusIcon}
  if FStatusIcon <> nil then
    gtk_status_icon_set_visible(FStatusIcon, True)
  else
{$endif}
    gtk_widget_show(plug);
end;

function TGtk2TrayIconHandle.GetPosition: TPoint;
var
{$ifdef UseStatusIcon}
  AScreen: PGdkScreen;
  AArea: TGdkRectangle;
  AOrientation: TGtkOrientation;
{$endif}
  WindowHandle: PGDKWindow;
begin
{$ifdef UseStatusIcon}
  if FStatusIcon <> nil then
  begin
{$T-} // PPGdkScreen = PGdkScreen; in FPC libs. @AScreen should be OK.
    gtk_status_icon_get_geometry(FStatusIcon, @AScreen, @AArea, @AOrientation);
{$T+}
    Result.x := AArea.x;
    Result.y := AArea.y;
  end
  else
{$endif}
  begin
    if Assigned(plug) then
    begin
      WindowHandle := plug^.window;
      if Assigned(WindowHandle) then
        gdk_window_get_origin(WindowHandle, @Result.X, @Result.Y);
    end;
  end;
end;

procedure TGtk2TrayIconHandle.Update(NewPixBuf: PGdkPixbuf; const NewHint: String);
begin
{$ifdef UseStatusIcon}
  if FStatusIcon <> nil then
  begin
    gtk_status_icon_set_from_pixbuf(FStatusIcon, NewPixBuf);
    {$IF FPC_FULLVERSION>30300}
    gtk_status_icon_set_tooltip_text(FStatusIcon, PChar(NewHint));
    {$ELSE}
    gtk_status_icon_set_tooltip(FStatusIcon, PChar(NewHint));
    {$ENDIF}
    g_object_set(PGObject(FStatusIcon), 'has-tooltip', gTRUE, nil);
  end
  else
{$endif}
  begin
    // Updates the tooltips
    if Assigned(Tips) then
      gtk_tooltips_set_tip(GTK_TOOLTIPS(Tips), plug, PChar(NewHint), '');
    // Updates the icon
    if Assigned(DrawingArea) then
      gtk_image_set_from_pixbuf(GTK_IMAGE(DrawingArea), NewPixbuf);
  end;
end;

{*******************************************************************
*  TGtk2WSCustomTrayIcon.Hide ()
*
*  DESCRIPTION:    Hides the main tray icon of the program
*
*  PARAMETERS:     None
*
*  RETURNS:        True if sucessfull, otherwise False
*
*******************************************************************}
class function TGtk2WSCustomTrayIcon.Hide(const ATrayIcon: TCustomTrayIcon): Boolean;
begin
  Result := False;

  { Free and nil the handle }
  TGtk2TrayIconHandle(ATrayIcon.Handle).Free;
  ATrayIcon.Handle := 0;

  Result := True;
end;

{*******************************************************************
*  TGtk2WSCustomTrayIcon.Show ()
*
*  DESCRIPTION:    Shows the main tray icon of the program
*
*  PARAMETERS:     None
*
*  RETURNS:        True if sucessfull, otherwise False
*
*******************************************************************}
class function TGtk2WSCustomTrayIcon.Show(const ATrayIcon: TCustomTrayIcon): Boolean;
var
  TrayIconHandle: TGtk2TrayIconHandle;
begin
  Result := False;

  TrayIconHandle := TGtk2TrayIconHandle.Create(ATrayIcon);
  ATrayIcon.Handle := HWND(TrayIconHandle);
  {*******************************************************************
  *  Now shows the GtkPlug
  *******************************************************************}
  TrayIconHandle.Show;
  {$ifdef UseStatusIcon}
  Result := True;
  {$else}
  if TrayIconHandle.fEmbedded then
    Result := True
  else
    Hide(ATrayIcon);
  {$endif}
end;

{*******************************************************************
*  TGtk2WSCustomTrayIcon.InternalUpdate ()
*
*  DESCRIPTION:    Makes modifications to the Icon while running
*                  i.e. without hiding it and showing again
*
*  PARAMETERS:     None
*
*  RETURNS:        Nothing
*
*******************************************************************}
class procedure TGtk2WSCustomTrayIcon.InternalUpdate(const ATrayIcon: TCustomTrayIcon);
begin
  if ATrayIcon.Handle <> 0 then
    TGtk2TrayIconHandle(ATrayIcon.Handle).Update({%H-}PGdkPixbuf(ATrayIcon.Icon.Handle), ATrayIcon.Hint);
end;

{*******************************************************************
*  TGtk2WSCustomTrayIcon.GetPosition ()
*
*  DESCRIPTION:    Returns the position of the tray icon on the display.
*                  This function is utilized to show message boxes near
*                  the icon
*
*  PARAMETERS:     None
*
*  RETURNS:        Nothing
*
*******************************************************************}
class function TGtk2WSCustomTrayIcon.GetPosition(const ATrayIcon: TCustomTrayIcon): TPoint;
begin
  Result := Point(0, 0);
  if ATrayIcon.Handle <> 0 then
    Result := TGtk2TrayIconHandle(ATrayIcon.Handle).GetPosition;
end;