programs/explorer/systray.c

   1 /*
   2  * Copyright (C) 2004 Mike Hearn, for CodeWeavers
   3  * Copyright (C) 2005 Robert Shearman
   4  * Copyright (C) 2008 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <assert.h>
  22
  23 #define NONAMELESSUNION
  24 #define _WIN32_IE 0x500
  25 #include <windows.h>
  26 #include <commctrl.h>
  27
  28 #include <wine/debug.h>
  29 #include <wine/list.h>
  30
  31 #include "explorer_private.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(systray);
  34
  35 struct notify_data  /* platform-independent format for NOTIFYICONDATA */
  36 {
  37     LONG  hWnd;
  38     UINT  uID;
  39     UINT  uFlags;
  40     UINT  uCallbackMessage;
  41     WCHAR szTip[128];
  42     DWORD dwState;
  43     DWORD dwStateMask;
  44     WCHAR szInfo[256];
  45     union {
  46         UINT uTimeout;
  47         UINT uVersion;
  48     } u;
  49     WCHAR szInfoTitle[64];
  50     DWORD dwInfoFlags;
  51     GUID  guidItem;
  52     /* data for the icon bitmap */
  53     UINT width;
  54     UINT height;
  55     UINT planes;
  56     UINT bpp;
  57 };
  58
  59 static int (CDECL *wine_notify_icon)(DWORD,NOTIFYICONDATAW *);
  60
  61 /* an individual systray icon, unpacked from the NOTIFYICONDATA and always in unicode */
  62 struct icon
  63 {
  64     struct list    entry;
  65     HICON          image;    /* the image to render */
  66     HWND           owner;    /* the HWND passed in to the Shell_NotifyIcon call */
  67     HWND           tooltip;  /* Icon tooltip */
  68     UINT           state;    /* state flags */
  69     UINT           id;       /* the unique id given by the app */
  70     UINT           callback_message;
  71     int            display;  /* index in display list, or -1 if hidden */
  72     WCHAR          tiptext[128]; /* Tooltip text. If empty => tooltip disabled */
  73     WCHAR          info_text[256];  /* info balloon text */
  74     WCHAR          info_title[64];  /* info balloon title */
  75     UINT           info_flags;      /* flags for info balloon */
  76     UINT           info_timeout;    /* timeout for info balloon */
  77     HICON          info_icon;       /* info balloon icon */
  78 };
  79
  80 static struct list icon_list = LIST_INIT( icon_list );
  81 static HWND tray_window;
  82
  83 static unsigned int alloc_displayed;
  84 static unsigned int nb_displayed;
  85 static struct icon **displayed;  /* array of currently displayed icons */
  86
  87 static BOOL hide_systray;
  88 static int icon_cx, icon_cy, tray_width;
  89
  90 static struct icon *balloon_icon;
  91 static HWND balloon_window;
  92
  93 #define MIN_DISPLAYED 8
  94 #define ICON_BORDER  2
  95
  96 #define VALID_WIN_TIMER      1
  97 #define BALLOON_CREATE_TIMER 2
  98 #define BALLOON_SHOW_TIMER   3
  99
 100 #define VALID_WIN_TIMEOUT        2000
 101 #define BALLOON_CREATE_TIMEOUT   2000
 102 #define BALLOON_SHOW_MIN_TIMEOUT 10000
 103 #define BALLOON_SHOW_MAX_TIMEOUT 30000
 104
 105 /* Retrieves icon record by owner window and ID */
 106 static struct icon *get_icon(HWND owner, UINT id)
 107 {
 108     struct icon *this;
 109
 110     /* search for the icon */
 111     LIST_FOR_EACH_ENTRY( this, &icon_list, struct icon, entry )
 112         if ((this->id == id) && (this->owner == owner)) return this;
 113
 114     return NULL;
 115 }
 116
 117 static RECT get_icon_rect( struct icon *icon )
 118 {
 119     RECT rect;
 120
 121     rect.right = tray_width - icon_cx * icon->display;
 122     rect.left = rect.right - icon_cx;
 123     rect.top = 0;
 124     rect.bottom = icon_cy;
 125     return rect;
 126 }
 127
 128 static void init_common_controls(void)
 129 {
 130     static BOOL initialized = FALSE;
 131
 132     if (!initialized)
 133     {
 134         INITCOMMONCONTROLSEX init_tooltip;
 135
 136         init_tooltip.dwSize = sizeof(INITCOMMONCONTROLSEX);
 137         init_tooltip.dwICC = ICC_TAB_CLASSES;
 138
 139         InitCommonControlsEx(&init_tooltip);
 140         initialized = TRUE;
 141     }
 142 }
 143
 144 /* Creates tooltip window for icon. */
 145 static void create_tooltip(struct icon *icon)
 146 {
 147     TTTOOLINFOW ti;
 148
 149     init_common_controls();
 150     icon->tooltip = CreateWindowExW(WS_EX_TOPMOST, TOOLTIPS_CLASSW, NULL,
 151                                    WS_POPUP | TTS_ALWAYSTIP,
 152                                    CW_USEDEFAULT, CW_USEDEFAULT,
 153                                    CW_USEDEFAULT, CW_USEDEFAULT,
 154                                    tray_window, NULL, NULL, NULL);
 155
 156     ZeroMemory(&ti, sizeof(ti));
 157     ti.cbSize = sizeof(TTTOOLINFOW);
 158     ti.hwnd = tray_window;
 159     ti.lpszText = icon->tiptext;
 160     if (icon->display != -1) ti.rect = get_icon_rect( icon );
 161     SendMessageW(icon->tooltip, TTM_ADDTOOLW, 0, (LPARAM)&ti);
 162 }
 163
 164 static void set_balloon_position( struct icon *icon )
 165 {
 166     RECT rect = get_icon_rect( icon );
 167     POINT pos;
 168
 169     MapWindowPoints( tray_window, 0, (POINT *)&rect, 2 );
 170     pos.x = (rect.left + rect.right) / 2;
 171     pos.y = (rect.top + rect.bottom) / 2;
 172     SendMessageW( balloon_window, TTM_TRACKPOSITION, 0, MAKELONG( pos.x, pos.y ));
 173 }
 174
 175 static void balloon_create_timer(void)
 176 {
 177     TTTOOLINFOW ti;
 178
 179     init_common_controls();
 180     balloon_window = CreateWindowExW( WS_EX_TOPMOST, TOOLTIPS_CLASSW, NULL,
 181                                       WS_POPUP | TTS_ALWAYSTIP | TTS_NOPREFIX | TTS_BALLOON | TTS_CLOSE,
 182                                       CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
 183                                       tray_window, NULL, NULL, NULL);
 184
 185     memset( &ti, 0, sizeof(ti) );
 186     ti.cbSize = sizeof(TTTOOLINFOW);
 187     ti.hwnd = tray_window;
 188     ti.uFlags = TTF_TRACK;
 189     ti.lpszText = balloon_icon->info_text;
 190     SendMessageW( balloon_window, TTM_ADDTOOLW, 0, (LPARAM)&ti );
 191     if ((balloon_icon->info_flags & NIIF_ICONMASK) == NIIF_USER)
 192         SendMessageW( balloon_window, TTM_SETTITLEW, (WPARAM)balloon_icon->info_icon,
 193                       (LPARAM)balloon_icon->info_title );
 194     else
 195         SendMessageW( balloon_window, TTM_SETTITLEW, balloon_icon->info_flags,
 196                       (LPARAM)balloon_icon->info_title );
 197     set_balloon_position( balloon_icon );
 198     SendMessageW( balloon_window, TTM_TRACKACTIVATE, TRUE, (LPARAM)&ti );
 199     KillTimer( tray_window, BALLOON_CREATE_TIMER );
 200     SetTimer( tray_window, BALLOON_SHOW_TIMER, balloon_icon->info_timeout, NULL );
 201 }
 202
 203 static BOOL show_balloon( struct icon *icon )
 204 {
 205     if (icon->display == -1) return FALSE;  /* not displayed */
 206     if (!icon->info_text[0]) return FALSE;  /* no balloon */
 207     balloon_icon = icon;
 208     SetTimer( tray_window, BALLOON_CREATE_TIMER, BALLOON_CREATE_TIMEOUT, NULL );
 209     return TRUE;
 210 }
 211
 212 static void hide_balloon(void)
 213 {
 214     if (!balloon_icon) return;
 215     if (balloon_window)
 216     {
 217         KillTimer( tray_window, BALLOON_SHOW_TIMER );
 218         DestroyWindow( balloon_window );
 219         balloon_window = 0;
 220     }
 221     else KillTimer( tray_window, BALLOON_CREATE_TIMER );
 222     balloon_icon = NULL;
 223 }
 224
 225 static void show_next_balloon(void)
 226 {
 227     struct icon *icon;
 228
 229     LIST_FOR_EACH_ENTRY( icon, &icon_list, struct icon, entry )
 230         if (show_balloon( icon )) break;
 231 }
 232
 233 static void update_balloon( struct icon *icon )
 234 {
 235     if (balloon_icon == icon)
 236     {
 237         hide_balloon();
 238         show_balloon( icon );
 239     }
 240     else if (!balloon_icon)
 241     {
 242         if (!show_balloon( icon )) return;
 243     }
 244     if (!balloon_icon) show_next_balloon();
 245 }
 246
 247 static void balloon_timer(void)
 248 {
 249     if (balloon_icon) balloon_icon->info_text[0] = 0;  /* clear text now that balloon has been shown */
 250     hide_balloon();
 251     show_next_balloon();
 252 }
 253
 254 /* Synchronize tooltip text with tooltip window */
 255 static void update_tooltip_text(struct icon *icon)
 256 {
 257     TTTOOLINFOW ti;
 258
 259     ZeroMemory(&ti, sizeof(ti));
 260     ti.cbSize = sizeof(TTTOOLINFOW);
 261     ti.hwnd = tray_window;
 262     ti.lpszText = icon->tiptext;
 263
 264     SendMessageW(icon->tooltip, TTM_UPDATETIPTEXTW, 0, (LPARAM)&ti);
 265 }
 266
 267 /* synchronize tooltip position with tooltip window */
 268 static void update_tooltip_position( struct icon *icon )
 269 {
 270     TTTOOLINFOW ti;
 271
 272     ZeroMemory(&ti, sizeof(ti));
 273     ti.cbSize = sizeof(TTTOOLINFOW);
 274     ti.hwnd = tray_window;
 275     if (icon->display != -1) ti.rect = get_icon_rect( icon );
 276     SendMessageW( icon->tooltip, TTM_NEWTOOLRECTW, 0, (LPARAM)&ti );
 277     if (balloon_icon == icon) set_balloon_position( icon );
 278 }
 279
 280 /* find the icon located at a certain point in the tray window */
 281 static struct icon *icon_from_point( int x, int y )
 282 {
 283     if (y < 0 || y >= icon_cy) return NULL;
 284     x = tray_width - x;
 285     if (x < 0 || x >= icon_cx * nb_displayed) return NULL;
 286     return displayed[x / icon_cx];
 287 }
 288
 289 /* invalidate the portion of the tray window that contains the specified icons */
 290 static void invalidate_icons( unsigned int start, unsigned int end )
 291 {
 292     RECT rect;
 293
 294     rect.left = tray_width - (end + 1) * icon_cx;
 295     rect.top  = 0;
 296     rect.right = tray_width - start * icon_cx;
 297     rect.bottom = icon_cy;
 298     InvalidateRect( tray_window, &rect, TRUE );
 299 }
 300
 301 /* make an icon visible */
 302 static BOOL show_icon(struct icon *icon)
 303 {
 304     WINE_TRACE("id=0x%x, hwnd=%p\n", icon->id, icon->owner);
 305
 306     if (icon->display != -1) return TRUE;  /* already displayed */
 307
 308     if (nb_displayed >= alloc_displayed)
 309     {
 310         unsigned int new_count = max( alloc_displayed * 2, 32 );
 311         struct icon **ptr;
 312         if (displayed) ptr = HeapReAlloc( GetProcessHeap(), 0, displayed, new_count * sizeof(*ptr) );
 313         else ptr = HeapAlloc( GetProcessHeap(), 0, new_count * sizeof(*ptr) );
 314         if (!ptr) return FALSE;
 315         displayed = ptr;
 316         alloc_displayed = new_count;
 317     }
 318
 319     icon->display = nb_displayed;
 320     displayed[nb_displayed++] = icon;
 321     update_tooltip_position( icon );
 322     invalidate_icons( nb_displayed-1, nb_displayed-1 );
 323
 324     if (nb_displayed == 1 && !hide_systray) ShowWindow( tray_window, SW_SHOWNA );
 325
 326     create_tooltip(icon);
 327     update_balloon( icon );
 328     return TRUE;
 329 }
 330
 331 /* make an icon invisible */
 332 static BOOL hide_icon(struct icon *icon)
 333 {
 334     unsigned int i;
 335
 336     WINE_TRACE("id=0x%x, hwnd=%p\n", icon->id, icon->owner);
 337
 338     if (icon->display == -1) return TRUE;  /* already hidden */
 339
 340     assert( nb_displayed );
 341     for (i = icon->display; i < nb_displayed - 1; i++)
 342     {
 343         displayed[i] = displayed[i + 1];
 344         displayed[i]->display = i;
 345         update_tooltip_position( displayed[i] );
 346     }
 347     nb_displayed--;
 348     invalidate_icons( icon->display, nb_displayed );
 349     icon->display = -1;
 350
 351     if (!nb_displayed) ShowWindow( tray_window, SW_HIDE );
 352
 353     update_balloon( icon );
 354     update_tooltip_position( icon );
 355     return TRUE;
 356 }
 357
 358 /* Modifies an existing icon record */
 359 static BOOL modify_icon( struct icon *icon, NOTIFYICONDATAW *nid )
 360 {
 361     WINE_TRACE("id=0x%x, hwnd=%p\n", nid->uID, nid->hWnd);
 362
 363     /* demarshal the request from the NID */
 364     if (!icon)
 365     {
 366         WINE_WARN("Invalid icon ID (0x%x) for HWND %p\n", nid->uID, nid->hWnd);
 367         return FALSE;
 368     }
 369
 370     if (nid->uFlags & NIF_STATE)
 371     {
 372         icon->state = (icon->state & ~nid->dwStateMask) | (nid->dwState & nid->dwStateMask);
 373     }
 374
 375     if (nid->uFlags & NIF_ICON)
 376     {
 377         if (icon->image) DestroyIcon(icon->image);
 378         icon->image = CopyIcon(nid->hIcon);
 379         if (icon->display != -1) invalidate_icons( icon->display, icon->display );
 380     }
 381
 382     if (nid->uFlags & NIF_MESSAGE)
 383     {
 384         icon->callback_message = nid->uCallbackMessage;
 385     }
 386     if (nid->uFlags & NIF_TIP)
 387     {
 388         lstrcpynW(icon->tiptext, nid->szTip, sizeof(icon->tiptext)/sizeof(WCHAR));
 389         if (icon->display != -1) update_tooltip_text(icon);
 390     }
 391     if (nid->uFlags & NIF_INFO && nid->cbSize >= NOTIFYICONDATAA_V2_SIZE)
 392     {
 393         lstrcpynW( icon->info_text, nid->szInfo, sizeof(icon->info_text)/sizeof(WCHAR) );
 394         lstrcpynW( icon->info_title, nid->szInfoTitle, sizeof(icon->info_title)/sizeof(WCHAR) );
 395         icon->info_flags = nid->dwInfoFlags;
 396         icon->info_timeout = max(min(nid->u.uTimeout, BALLOON_SHOW_MAX_TIMEOUT), BALLOON_SHOW_MIN_TIMEOUT);
 397         icon->info_icon = nid->hBalloonIcon;
 398         update_balloon( icon );
 399     }
 400     if (icon->state & NIS_HIDDEN) hide_icon( icon );
 401     else show_icon( icon );
 402     return TRUE;
 403 }
 404
 405 /* Adds a new icon record to the list */
 406 static BOOL add_icon(NOTIFYICONDATAW *nid)
 407 {
 408     struct icon  *icon;
 409
 410     WINE_TRACE("id=0x%x, hwnd=%p\n", nid->uID, nid->hWnd);
 411
 412     if ((icon = get_icon(nid->hWnd, nid->uID)))
 413     {
 414         WINE_WARN("duplicate tray icon add, buggy app?\n");
 415         return FALSE;
 416     }
 417
 418     if (!(icon = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*icon))))
 419     {
 420         WINE_ERR("out of memory\n");
 421         return FALSE;
 422     }
 423
 424     ZeroMemory(icon, sizeof(struct icon));
 425     icon->id     = nid->uID;
 426     icon->owner  = nid->hWnd;
 427     icon->display = -1;
 428
 429     if (list_empty( &icon_list )) SetTimer( tray_window, VALID_WIN_TIMER, VALID_WIN_TIMEOUT, NULL );
 430     list_add_tail(&icon_list, &icon->entry);
 431
 432     return modify_icon( icon, nid );
 433 }
 434
 435 /* Deletes tray icon window and icon record */
 436 static BOOL delete_icon(struct icon *icon)
 437 {
 438     hide_icon(icon);
 439     list_remove(&icon->entry);
 440     DestroyIcon(icon->image);
 441     HeapFree(GetProcessHeap(), 0, icon);
 442     if (list_empty( &icon_list )) KillTimer( tray_window, VALID_WIN_TIMER );
 443     return TRUE;
 444 }
 445
 446 /* cleanup icons belonging to windows that have been destroyed */
 447 static void cleanup_destroyed_windows(void)
 448 {
 449     struct icon *icon, *next;
 450
 451     LIST_FOR_EACH_ENTRY_SAFE( icon, next, &icon_list, struct icon, entry )
 452         if (!IsWindow( icon->owner )) delete_icon( icon );
 453 }
 454
 455 static BOOL handle_incoming(HWND hwndSource, COPYDATASTRUCT *cds)
 456 {
 457     struct icon *icon = NULL;
 458     const struct notify_data *data;
 459     NOTIFYICONDATAW nid;
 460     int ret = FALSE;
 461
 462     if (cds->cbData < sizeof(*data)) return FALSE;
 463     data = cds->lpData;
 464
 465     nid.cbSize           = sizeof(nid);
 466     nid.hWnd             = LongToHandle( data->hWnd );
 467     nid.uID              = data->uID;
 468     nid.uFlags           = data->uFlags;
 469     nid.uCallbackMessage = data->uCallbackMessage;
 470     nid.hIcon            = 0;
 471     nid.dwState          = data->dwState;
 472     nid.dwStateMask      = data->dwStateMask;
 473     nid.u.uTimeout       = data->u.uTimeout;
 474     nid.dwInfoFlags      = data->dwInfoFlags;
 475     nid.guidItem         = data->guidItem;
 476     lstrcpyW( nid.szTip, data->szTip );
 477     lstrcpyW( nid.szInfo, data->szInfo );
 478     lstrcpyW( nid.szInfoTitle, data->szInfoTitle );
 479     nid.hBalloonIcon     = 0;
 480
 481     /* FIXME: if statement only needed because we don't support interprocess
 482      * icon handles */
 483     if ((nid.uFlags & NIF_ICON) && cds->cbData > sizeof(*data))
 484     {
 485         LONG cbMaskBits;
 486         LONG cbColourBits;
 487         const char *buffer = (const char *)(data + 1);
 488
 489         cbMaskBits = (data->width * data->height + 15) / 16 * 2;
 490         cbColourBits = (data->planes * data->width * data->height * data->bpp + 15) / 16 * 2;
 491
 492         if (cds->cbData < sizeof(*data) + cbMaskBits + cbColourBits)
 493         {
 494             WINE_ERR("buffer underflow\n");
 495             return FALSE;
 496         }
 497         nid.hIcon = CreateIcon(NULL, data->width, data->height, data->planes, data->bpp,
 498                                buffer, buffer + cbMaskBits);
 499     }
 500
 501     /* try forward to x11drv first */
 502     if (cds->dwData == NIM_ADD || !(icon = get_icon( nid.hWnd, nid.uID )))
 503     {
 504         if (wine_notify_icon && ((ret = wine_notify_icon( cds->dwData, &nid )) != -1))
 505         {
 506             if (nid.hIcon) DestroyIcon( nid.hIcon );
 507             return ret;
 508         }
 509         ret = FALSE;
 510     }
 511
 512     switch (cds->dwData)
 513     {
 514     case NIM_ADD:
 515         ret = add_icon(&nid);
 516         break;
 517     case NIM_DELETE:
 518         if (icon) ret = delete_icon( icon );
 519         break;
 520     case NIM_MODIFY:
 521         if (icon) ret = modify_icon( icon, &nid );
 522         break;
 523     default:
 524         WINE_FIXME("unhandled tray message: %ld\n", cds->dwData);
 525         break;
 526     }
 527
 528     if (nid.hIcon) DestroyIcon( nid.hIcon );
 529     return ret;
 530 }
 531
 532 static void do_hide_systray(void)
 533 {
 534     SetWindowPos( tray_window, 0,
 535                   GetSystemMetrics(SM_XVIRTUALSCREEN) + GetSystemMetrics(SM_CXVIRTUALSCREEN),
 536                   GetSystemMetrics(SM_YVIRTUALSCREEN) + GetSystemMetrics(SM_CYVIRTUALSCREEN),
 537                   0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 538 }
 539
 540 static LRESULT WINAPI tray_wndproc( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
 541 {
 542     switch (msg)
 543     {
 544     case WM_COPYDATA:
 545         return handle_incoming((HWND)wparam, (COPYDATASTRUCT *)lparam);
 546
 547     case WM_DISPLAYCHANGE:
 548         if (hide_systray) do_hide_systray();
 549         else
 550         {
 551             tray_width = GetSystemMetrics( SM_CXSCREEN );
 552             SetWindowPos( tray_window, 0, 0, GetSystemMetrics( SM_CYSCREEN ) - icon_cy,
 553                           tray_width, icon_cy, SWP_NOZORDER | SWP_NOACTIVATE );
 554         }
 555         break;
 556
 557     case WM_TIMER:
 558         switch (wparam)
 559         {
 560         case VALID_WIN_TIMER:      cleanup_destroyed_windows(); break;
 561         case BALLOON_CREATE_TIMER: balloon_create_timer(); break;
 562         case BALLOON_SHOW_TIMER:   balloon_timer(); break;
 563         }
 564         break;
 565
 566     case WM_PAINT:
 567         {
 568             unsigned int i;
 569             PAINTSTRUCT ps;
 570             HDC hdc;
 571
 572             hdc = BeginPaint( hwnd, &ps );
 573             for (i = 0; i < nb_displayed; i++)
 574             {
 575                 RECT dummy, rect = get_icon_rect( displayed[i] );
 576                 if (IntersectRect( &dummy, &rect, &ps.rcPaint ))
 577                     DrawIconEx( hdc, rect.left + ICON_BORDER, rect.top + ICON_BORDER, displayed[i]->image,
 578                                 icon_cx - 2*ICON_BORDER, icon_cy - 2*ICON_BORDER,
 579                             0, 0, DI_DEFAULTSIZE|DI_NORMAL);
 580             }
 581             EndPaint( hwnd, &ps );
 582             break;
 583         }
 584
 585     case WM_MOUSEMOVE:
 586     case WM_LBUTTONDOWN:
 587     case WM_LBUTTONUP:
 588     case WM_RBUTTONDOWN:
 589     case WM_RBUTTONUP:
 590     case WM_MBUTTONDOWN:
 591     case WM_MBUTTONUP:
 592     case WM_LBUTTONDBLCLK:
 593     case WM_RBUTTONDBLCLK:
 594     case WM_MBUTTONDBLCLK:
 595         {
 596             MSG message;
 597             struct icon *icon = icon_from_point( (short)LOWORD(lparam), (short)HIWORD(lparam) );
 598             if (!icon) break;
 599
 600             /* notify the owner hwnd of the message */
 601             WINE_TRACE("relaying 0x%x\n", msg);
 602
 603             message.hwnd = hwnd;
 604             message.message = msg;
 605             message.wParam = wparam;
 606             message.lParam = lparam;
 607             SendMessageW( icon->tooltip, TTM_RELAYEVENT, 0, (LPARAM)&message );
 608
 609             if (!PostMessageW( icon->owner, icon->callback_message, (WPARAM) icon->id, (LPARAM) msg ) &&
 610                 GetLastError() == ERROR_INVALID_WINDOW_HANDLE)
 611             {
 612                 WINE_WARN("application window was destroyed without removing "
 613                           "notification icon, removing automatically\n");
 614                 delete_icon( icon );
 615             }
 616             break;
 617         }
 618
 619     case WM_CLOSE:
 620         /* don't destroy the tray window, just hide it */
 621         ShowWindow( hwnd, SW_HIDE );
 622         return 0;
 623
 624     default:
 625         return DefWindowProcW( hwnd, msg, wparam, lparam );
 626     }
 627     return 0;
 628 }
 629
 630 /* this function creates the listener window */
 631 void initialize_systray( BOOL using_root )
 632 {
 633     HMODULE x11drv;
 634     WNDCLASSEXW class;
 635     static const WCHAR classname[] = {'S','h','e','l','l','_','T','r','a','y','W','n','d',0};
 636
 637     if ((x11drv = GetModuleHandleA( "winex11.drv" )))
 638         wine_notify_icon = (void *)GetProcAddress( x11drv, "wine_notify_icon" );
 639
 640     icon_cx = GetSystemMetrics( SM_CXSMICON ) + 2*ICON_BORDER;
 641     icon_cy = GetSystemMetrics( SM_CYSMICON ) + 2*ICON_BORDER;
 642     hide_systray = using_root;
 643
 644     /* register the systray listener window class */
 645     ZeroMemory(&class, sizeof(class));
 646     class.cbSize        = sizeof(class);
 647     class.style         = CS_DBLCLKS | CS_HREDRAW;
 648     class.lpfnWndProc   = tray_wndproc;
 649     class.hInstance     = NULL;
 650     class.hIcon         = LoadIconW(0, (LPCWSTR)IDI_WINLOGO);
 651     class.hCursor       = LoadCursorW(0, (LPCWSTR)IDC_ARROW);
 652     class.hbrBackground = (HBRUSH) COLOR_WINDOW;
 653     class.lpszClassName = (WCHAR *) &classname;
 654
 655     if (!RegisterClassExW(&class))
 656     {
 657         WINE_ERR("Could not register SysTray window class\n");
 658         return;
 659     }
 660
 661     tray_width = GetSystemMetrics( SM_CXSCREEN );
 662     tray_window = CreateWindowExW( WS_EX_NOACTIVATE, classname, NULL, WS_POPUP,
 663                                    0, GetSystemMetrics( SM_CYSCREEN ) - icon_cy,
 664                                    tray_width, icon_cy, 0, 0, 0, 0 );
 665     if (!tray_window)
 666     {
 667         WINE_ERR("Could not create tray window\n");
 668         return;
 669     }
 670
 671     if (hide_systray) do_hide_systray();
 672 }