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