windows/multimon.c

   1 /*
   2  * Multimonitor APIs
   3  *
   4  * Copyright 1998 Turchanov Sergey
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <string.h>
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "wingdi.h"
  26 #include "winuser.h"
  27 #include "wine/unicode.h"
  28
  29 /**********************************************************************/
  30
  31 #define xPRIMARY_MONITOR ((HMONITOR)0x12340042)
  32
  33 /***********************************************************************
  34  *              MonitorFromPoint (USER32.@)
  35  */
  36 HMONITOR WINAPI MonitorFromPoint(POINT ptScreenCoords, DWORD dwFlags)
  37 {
  38     if ((dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST)) ||
  39         ((ptScreenCoords.x >= 0) &&
  40         (ptScreenCoords.x < GetSystemMetrics(SM_CXSCREEN)) &&
  41         (ptScreenCoords.y >= 0) &&
  42         (ptScreenCoords.y < GetSystemMetrics(SM_CYSCREEN))))
  43     {
  44         return xPRIMARY_MONITOR;
  45     }
  46     return NULL;
  47 }
  48
  49 /***********************************************************************
  50  *              MonitorFromRect (USER32.@)
  51  */
  52 HMONITOR WINAPI MonitorFromRect(LPRECT lprcScreenCoords, DWORD dwFlags)
  53 {
  54     if ((dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST)) ||
  55         ((lprcScreenCoords->right > 0) &&
  56         (lprcScreenCoords->bottom > 0) &&
  57         (lprcScreenCoords->left < GetSystemMetrics(SM_CXSCREEN)) &&
  58         (lprcScreenCoords->top < GetSystemMetrics(SM_CYSCREEN))))
  59     {
  60         return xPRIMARY_MONITOR;
  61     }
  62     return NULL;
  63 }
  64
  65 /***********************************************************************
  66  *              MonitorFromWindow (USER32.@)
  67  */
  68 HMONITOR WINAPI MonitorFromWindow(HWND hWnd, DWORD dwFlags)
  69 {
  70     WINDOWPLACEMENT wp;
  71
  72     if (dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST))
  73         return xPRIMARY_MONITOR;
  74
  75     if (IsIconic(hWnd) ?
  76             GetWindowPlacement(hWnd, &wp) :
  77             GetWindowRect(hWnd, &wp.rcNormalPosition)) {
  78
  79         return MonitorFromRect(&wp.rcNormalPosition, dwFlags);
  80     }
  81
  82     return NULL;
  83 }
  84
  85 /***********************************************************************
  86  *              GetMonitorInfoA (USER32.@)
  87  */
  88 BOOL WINAPI GetMonitorInfoA(HMONITOR hMonitor, LPMONITORINFO lpMonitorInfo)
  89 {
  90     RECT rcWork;
  91
  92     if ((hMonitor == xPRIMARY_MONITOR) &&
  93         lpMonitorInfo &&
  94         (lpMonitorInfo->cbSize >= sizeof(MONITORINFO)) &&
  95         SystemParametersInfoA(SPI_GETWORKAREA, 0, &rcWork, 0))
  96     {
  97         SetRect( &lpMonitorInfo->rcMonitor, 0, 0,
  98                  GetSystemMetrics(SM_CXSCREEN),
  99                  GetSystemMetrics(SM_CYSCREEN) );
 100         lpMonitorInfo->rcWork = rcWork;
 101         lpMonitorInfo->dwFlags = MONITORINFOF_PRIMARY;
 102
 103         if (lpMonitorInfo->cbSize >= sizeof(MONITORINFOEXA))
 104             strcpy(((MONITORINFOEXA*)lpMonitorInfo)->szDevice, "DISPLAY");
 105
 106         return TRUE;
 107     }
 108
 109     return FALSE;
 110 }
 111
 112 /***********************************************************************
 113  *              GetMonitorInfoW (USER32.@)
 114  */
 115 BOOL WINAPI GetMonitorInfoW(HMONITOR hMonitor, LPMONITORINFO lpMonitorInfo)
 116 {
 117     static const WCHAR displayW[] = {'D','I','S','P','L','A','Y',0};
 118     RECT rcWork;
 119
 120     if ((hMonitor == xPRIMARY_MONITOR) &&
 121         lpMonitorInfo &&
 122         (lpMonitorInfo->cbSize >= sizeof(MONITORINFO)) &&
 123         SystemParametersInfoW(SPI_GETWORKAREA, 0, &rcWork, 0))
 124     {
 125         SetRect( &lpMonitorInfo->rcMonitor, 0, 0,
 126                  GetSystemMetrics(SM_CXSCREEN),
 127                  GetSystemMetrics(SM_CYSCREEN) );
 128         lpMonitorInfo->rcWork = rcWork;
 129         lpMonitorInfo->dwFlags = MONITORINFOF_PRIMARY;
 130
 131         if (lpMonitorInfo->cbSize >= sizeof(MONITORINFOEXW))
 132             strcpyW(((MONITORINFOEXW*)lpMonitorInfo)->szDevice, displayW);
 133
 134         return TRUE;
 135     }
 136
 137     return FALSE;
 138 }
 139
 140 /***********************************************************************
 141  *              EnumDisplayMonitors (USER32.@)
 142  */
 143 BOOL WINAPI EnumDisplayMonitors(
 144         HDC             hdcOptionalForPainting,
 145         LPRECT         lprcEnumMonitorsThatIntersect,
 146         MONITORENUMPROC lpfnEnumProc,
 147         LPARAM          dwData)
 148 {
 149     RECT rcLimit;
 150     SetRect( &rcLimit, 0, 0, GetSystemMetrics(SM_CXSCREEN),
 151              GetSystemMetrics(SM_CYSCREEN) );
 152
 153     if (!lpfnEnumProc)
 154         return FALSE;
 155
 156     if (hdcOptionalForPainting)
 157     {
 158         RECT    rcClip;
 159         POINT   ptOrg;
 160
 161         switch (GetClipBox(hdcOptionalForPainting, &rcClip))
 162         {
 163         default:
 164             if (!GetDCOrgEx(hdcOptionalForPainting, &ptOrg))
 165                 return FALSE;
 166
 167             OffsetRect(&rcLimit, -ptOrg.x, -ptOrg.y);
 168             if (IntersectRect(&rcLimit, &rcLimit, &rcClip) &&
 169                 (!lprcEnumMonitorsThatIntersect ||
 170                      IntersectRect(&rcLimit, &rcLimit, lprcEnumMonitorsThatIntersect))) {
 171
 172                 break;
 173             }
 174             /* fall through */
 175         case NULLREGION:
 176              return TRUE;
 177         case ERROR:
 178              return FALSE;
 179         }
 180     } else {
 181         if (    lprcEnumMonitorsThatIntersect &&
 182                 !IntersectRect(&rcLimit, &rcLimit, lprcEnumMonitorsThatIntersect)) {
 183
 184             return TRUE;
 185         }
 186     }
 187
 188     return lpfnEnumProc(
 189             xPRIMARY_MONITOR,
 190             hdcOptionalForPainting,
 191             &rcLimit,
 192             dwData);
 193 }