controls/desktop.c

   1 /*
   2  * Desktop window class.
   3  *
   4  * Copyright 1994 Alexandre Julliard
   5  */
   6
   7 #include <stdio.h>
   8 #include <string.h>
   9 #include <unistd.h>
  10 #include "win.h"
  11 #include "desktop.h"
  12 #include "heap.h"
  13 #include "wine/winuser16.h"
  14
  15
  16 /***********************************************************************
  17  *           DESKTOP_LoadBitmap
  18  *
  19  * Load a bitmap from a file. Used by SetDeskWallPaper().
  20  */
  21 static HBITMAP32 DESKTOP_LoadBitmap( HDC32 hdc, const char *filename )
  22 {
  23     BITMAPFILEHEADER *fileHeader;
  24     BITMAPINFO *bitmapInfo;
  25     HBITMAP32 hbitmap;
  26     HFILE32 file;
  27     LPSTR buffer;
  28     LONG size;
  29
  30     /* Read all the file into memory */
  31
  32     if ((file = _lopen32( filename, OF_READ )) == HFILE_ERROR32)
  33     {
  34         UINT32 len = GetWindowsDirectory32A( NULL, 0 );
  35         if (!(buffer = HeapAlloc( GetProcessHeap(), 0,
  36                                   len + strlen(filename) + 2 )))
  37             return 0;
  38         GetWindowsDirectory32A( buffer, len + 1 );
  39         strcat( buffer, "\\" );
  40         strcat( buffer, filename );
  41         file = _lopen32( buffer, OF_READ );
  42         HeapFree( GetProcessHeap(), 0, buffer );
  43     }
  44     if (file == HFILE_ERROR32) return 0;
  45     size = _llseek32( file, 0, 2 );
  46     if (!(buffer = HeapAlloc( GetProcessHeap(), 0, size )))
  47     {
  48         _lclose32( file );
  49         return 0;
  50     }
  51     _llseek32( file, 0, 0 );
  52     size = _lread32( file, buffer, size );
  53     _lclose32( file );
  54     fileHeader = (BITMAPFILEHEADER *)buffer;
  55     bitmapInfo = (BITMAPINFO *)(buffer + sizeof(BITMAPFILEHEADER));
  56
  57       /* Check header content */
  58     if ((fileHeader->bfType != 0x4d42) || (size < fileHeader->bfSize))
  59     {
  60         HeapFree( GetProcessHeap(), 0, buffer );
  61         return 0;
  62     }
  63     hbitmap = CreateDIBitmap32( hdc, &bitmapInfo->bmiHeader, CBM_INIT,
  64                                 buffer + fileHeader->bfOffBits,
  65                                 bitmapInfo, DIB_RGB_COLORS );
  66     HeapFree( GetProcessHeap(), 0, buffer );
  67     return hbitmap;
  68 }
  69
  70
  71 /***********************************************************************
  72  *           DESKTOP_DoEraseBkgnd
  73  *
  74  * Handle the WM_ERASEBKGND message.
  75  */
  76 static LRESULT DESKTOP_DoEraseBkgnd( HWND32 hwnd, HDC32 hdc,
  77                                      DESKTOPINFO *infoPtr )
  78 {
  79     RECT32 rect;
  80     WND*   Wnd = WIN_FindWndPtr( hwnd );
  81
  82     if (Wnd->hrgnUpdate > 1) DeleteObject32( Wnd->hrgnUpdate );
  83     Wnd->hrgnUpdate = 0;
  84
  85     GetClientRect32( hwnd, &rect );
  86
  87     /* Paint desktop pattern (only if wall paper does not cover everything) */
  88
  89     if (!infoPtr->hbitmapWallPaper ||
  90         (!infoPtr->fTileWallPaper && ((infoPtr->bitmapSize.cx < rect.right) ||
  91          (infoPtr->bitmapSize.cy < rect.bottom))))
  92     {
  93           /* Set colors in case pattern is a monochrome bitmap */
  94         SetBkColor32( hdc, RGB(0,0,0) );
  95         SetTextColor32( hdc, GetSysColor32(COLOR_BACKGROUND) );
  96         FillRect32( hdc, &rect, infoPtr->hbrushPattern );
  97     }
  98
  99       /* Paint wall paper */
 100
 101     if (infoPtr->hbitmapWallPaper)
 102     {
 103         INT32 x, y;
 104         HDC32 hMemDC = CreateCompatibleDC32( hdc );
 105
 106         SelectObject32( hMemDC, infoPtr->hbitmapWallPaper );
 107
 108         if (infoPtr->fTileWallPaper)
 109         {
 110             for (y = 0; y < rect.bottom; y += infoPtr->bitmapSize.cy)
 111                 for (x = 0; x < rect.right; x += infoPtr->bitmapSize.cx)
 112                     BitBlt32( hdc, x, y, infoPtr->bitmapSize.cx,
 113                               infoPtr->bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
 114         }
 115         else
 116         {
 117             x = (rect.left + rect.right - infoPtr->bitmapSize.cx) / 2;
 118             y = (rect.top + rect.bottom - infoPtr->bitmapSize.cy) / 2;
 119             if (x < 0) x = 0;
 120             if (y < 0) y = 0;
 121             BitBlt32( hdc, x, y, infoPtr->bitmapSize.cx,
 122                       infoPtr->bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
 123         }
 124         DeleteDC32( hMemDC );
 125     }
 126
 127     return 1;
 128 }
 129
 130
 131 /***********************************************************************
 132  *           DesktopWndProc
 133  *
 134  * Window procedure for the desktop window.
 135  */
 136 LRESULT WINAPI DesktopWndProc( HWND32 hwnd, UINT32 message,
 137                                WPARAM32 wParam, LPARAM lParam )
 138 {
 139     WND *wndPtr = WIN_FindWndPtr( hwnd );
 140     DESKTOPINFO *infoPtr = (DESKTOPINFO *)wndPtr->wExtra;
 141
 142       /* Most messages are ignored (we DON'T call DefWindowProc) */
 143
 144     switch(message)
 145     {
 146         /* Warning: this message is sent directly by                     */
 147         /* WIN_CreateDesktopWindow() and does not contain a valid lParam */
 148     case WM_NCCREATE:
 149         infoPtr->hbrushPattern = 0;
 150         infoPtr->hbitmapWallPaper = 0;
 151         SetDeskPattern();
 152         SetDeskWallPaper32( (LPSTR)-1 );
 153         return 1;
 154
 155     case WM_ERASEBKGND:
 156         if (rootWindow == DefaultRootWindow(display)) return 1;
 157         return DESKTOP_DoEraseBkgnd( hwnd, (HDC32)wParam, infoPtr );
 158
 159     case WM_SYSCOMMAND:
 160         if ((wParam & 0xfff0) != SC_CLOSE) return 0;
 161         ExitWindows16( 0, 0 );
 162
 163     case WM_SETCURSOR:
 164         return (LRESULT)SetCursor16( LoadCursor16( 0, IDC_ARROW16 ) );
 165     }
 166
 167     return 0;
 168 }
 169
 170 /***********************************************************************
 171  *           PaintDesktop   (USER32.415)
 172  *
 173  */
 174 BOOL32 WINAPI PaintDesktop(HDC32 hdc)
 175 {
 176     HWND32 hwnd = GetDesktopWindow32();
 177     WND *wndPtr = WIN_FindWndPtr( hwnd );
 178     DESKTOPINFO *infoPtr = (DESKTOPINFO *)wndPtr->wExtra;
 179
 180     return DESKTOP_DoEraseBkgnd( hwnd, hdc, infoPtr );
 181 }
 182
 183 /***********************************************************************
 184  *           SetDeskPattern   (USER.279)
 185  */
 186 BOOL16 WINAPI SetDeskPattern(void)
 187 {
 188     char buffer[100];
 189     GetProfileString32A( "desktop", "Pattern", "(None)", buffer, 100 );
 190     return DESKTOP_SetPattern( buffer );
 191 }
 192
 193
 194 /***********************************************************************
 195  *           SetDeskWallPaper16   (USER.285)
 196  */
 197 BOOL16 WINAPI SetDeskWallPaper16( LPCSTR filename )
 198 {
 199     return SetDeskWallPaper32( filename );
 200 }
 201
 202
 203 /***********************************************************************
 204  *           SetDeskWallPaper32   (USER32.475)
 205  *
 206  * FIXME: is there a unicode version?
 207  */
 208 BOOL32 WINAPI SetDeskWallPaper32( LPCSTR filename )
 209 {
 210     HBITMAP32 hbitmap;
 211     HDC32 hdc;
 212     char buffer[256];
 213     WND *wndPtr = WIN_GetDesktop();
 214     DESKTOPINFO *infoPtr = (DESKTOPINFO *)wndPtr->wExtra;
 215
 216     if (filename == (LPSTR)-1)
 217     {
 218         GetProfileString32A( "desktop", "WallPaper", "(None)", buffer, 256 );
 219         filename = buffer;
 220     }
 221     hdc = GetDC32( 0 );
 222     hbitmap = DESKTOP_LoadBitmap( hdc, filename );
 223     ReleaseDC32( 0, hdc );
 224     if (infoPtr->hbitmapWallPaper) DeleteObject32( infoPtr->hbitmapWallPaper );
 225     infoPtr->hbitmapWallPaper = hbitmap;
 226     infoPtr->fTileWallPaper = GetProfileInt32A( "desktop", "TileWallPaper", 0 );
 227     if (hbitmap)
 228     {
 229         BITMAP32 bmp;
 230         GetObject32A( hbitmap, sizeof(bmp), &bmp );
 231         infoPtr->bitmapSize.cx = (bmp.bmWidth != 0) ? bmp.bmWidth : 1;
 232         infoPtr->bitmapSize.cy = (bmp.bmHeight != 0) ? bmp.bmHeight : 1;
 233     }
 234     return TRUE;
 235 }
 236
 237
 238 /***********************************************************************
 239  *           DESKTOP_SetPattern
 240  *
 241  * Set the desktop pattern.
 242  */
 243 BOOL32 DESKTOP_SetPattern( LPCSTR pattern )
 244 {
 245     WND *wndPtr = WIN_GetDesktop();
 246     DESKTOPINFO *infoPtr = (DESKTOPINFO *)wndPtr->wExtra;
 247     int pat[8];
 248
 249     if (infoPtr->hbrushPattern) DeleteObject32( infoPtr->hbrushPattern );
 250     memset( pat, 0, sizeof(pat) );
 251     if (pattern && sscanf( pattern, " %d %d %d %d %d %d %d %d",
 252                            &pat[0], &pat[1], &pat[2], &pat[3],
 253                            &pat[4], &pat[5], &pat[6], &pat[7] ))
 254     {
 255         WORD pattern[8];
 256         HBITMAP32 hbitmap;
 257         int i;
 258
 259         for (i = 0; i < 8; i++) pattern[i] = pat[i] & 0xffff;
 260         hbitmap = CreateBitmap32( 8, 8, 1, 1, (LPSTR)pattern );
 261         infoPtr->hbrushPattern = CreatePatternBrush32( hbitmap );
 262         DeleteObject32( hbitmap );
 263     }
 264     else infoPtr->hbrushPattern = CreateSolidBrush32( GetSysColor32(COLOR_BACKGROUND) );
 265     return TRUE;
 266 }
 267