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
  11 #include "windef.h"
  12 #include "wingdi.h"
  13 #include "heap.h"
  14 #include "user.h"
  15 #include "win.h"
  16 #include "controls.h"
  17 #include "wine/winuser16.h"
  18
  19 typedef struct
  20 {
  21     HBRUSH        hbrushPattern;
  22     HBITMAP       hbitmapWallPaper;
  23     SIZE          bitmapSize;
  24     BOOL          fTileWallPaper;
  25 } DESKTOP;
  26
  27 static LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam );
  28
  29
  30 /*********************************************************************
  31  * desktop class descriptor
  32  */
  33 const struct builtin_class_descr DESKTOP_builtin_class =
  34 {
  35     DESKTOP_CLASS_ATOM,   /* name */
  36     CS_GLOBALCLASS,       /* style */
  37     NULL,                 /* procA (winproc is Unicode only) */
  38     DesktopWndProc,       /* procW */
  39     sizeof(DESKTOP),      /* extra */
  40     IDC_ARROWA,           /* cursor */
  41     COLOR_BACKGROUND+1    /* brush */
  42 };
  43
  44
  45 /***********************************************************************
  46  *           DESKTOP_LoadBitmap
  47  *
  48  * Load a bitmap from a file. Used by SetDeskWallPaper().
  49  */
  50 static HBITMAP DESKTOP_LoadBitmap( HDC hdc, const char *filename )
  51 {
  52     BITMAPFILEHEADER *fileHeader;
  53     BITMAPINFO *bitmapInfo;
  54     HBITMAP hbitmap;
  55     HFILE file;
  56     LPSTR buffer;
  57     LONG size;
  58
  59     /* Read all the file into memory */
  60
  61     if ((file = _lopen( filename, OF_READ )) == HFILE_ERROR)
  62     {
  63         UINT len = GetWindowsDirectoryA( NULL, 0 );
  64         if (!(buffer = HeapAlloc( GetProcessHeap(), 0,
  65                                   len + strlen(filename) + 2 )))
  66             return 0;
  67         GetWindowsDirectoryA( buffer, len + 1 );
  68         strcat( buffer, "\\" );
  69         strcat( buffer, filename );
  70         file = _lopen( buffer, OF_READ );
  71         HeapFree( GetProcessHeap(), 0, buffer );
  72     }
  73     if (file == HFILE_ERROR) return 0;
  74     size = _llseek( file, 0, 2 );
  75     if (!(buffer = HeapAlloc( GetProcessHeap(), 0, size )))
  76     {
  77         _lclose( file );
  78         return 0;
  79     }
  80     _llseek( file, 0, 0 );
  81     size = _lread( file, buffer, size );
  82     _lclose( file );
  83     fileHeader = (BITMAPFILEHEADER *)buffer;
  84     bitmapInfo = (BITMAPINFO *)(buffer + sizeof(BITMAPFILEHEADER));
  85
  86       /* Check header content */
  87     if ((fileHeader->bfType != 0x4d42) || (size < fileHeader->bfSize))
  88     {
  89         HeapFree( GetProcessHeap(), 0, buffer );
  90         return 0;
  91     }
  92     hbitmap = CreateDIBitmap( hdc, &bitmapInfo->bmiHeader, CBM_INIT,
  93                                 buffer + fileHeader->bfOffBits,
  94                                 bitmapInfo, DIB_RGB_COLORS );
  95     HeapFree( GetProcessHeap(), 0, buffer );
  96     return hbitmap;
  97 }
  98
  99
 100
 101 /***********************************************************************
 102  *           DesktopWndProc
 103  */
 104 static LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
 105 {
 106     LRESULT retvalue = 0;
 107     WND *wndPtr = WIN_FindWndPtr( hwnd );
 108     DESKTOP *desktopPtr = (DESKTOP *)wndPtr->wExtra;
 109
 110     if (message == WM_NCCREATE)
 111     {
 112         desktopPtr->hbrushPattern = 0;
 113         desktopPtr->hbitmapWallPaper = 0;
 114         SetDeskPattern();
 115         SetDeskWallPaper( (LPSTR)-1 );
 116         retvalue = 1;
 117     }
 118     /* all other messages are ignored */
 119
 120     WIN_ReleaseWndPtr(wndPtr);
 121     return retvalue;
 122 }
 123
 124 /***********************************************************************
 125  *           PaintDesktop   (USER32.@)
 126  *
 127  */
 128 BOOL WINAPI PaintDesktop(HDC hdc)
 129 {
 130     HWND hwnd = GetDesktopWindow();
 131     WND *wndPtr = WIN_FindWndPtr( hwnd );
 132     DESKTOP *desktopPtr = (DESKTOP *)wndPtr->wExtra;
 133
 134     /* check for a queue; otherwise don't paint anything (non-desktop mode) */
 135     if (wndPtr->hmemTaskQ)
 136     {
 137         RECT rect;
 138
 139         GetClientRect( hwnd, &rect );
 140
 141         /* Paint desktop pattern (only if wall paper does not cover everything) */
 142
 143         if (!desktopPtr->hbitmapWallPaper ||
 144             (!desktopPtr->fTileWallPaper && ((desktopPtr->bitmapSize.cx < rect.right) ||
 145                                              (desktopPtr->bitmapSize.cy < rect.bottom))))
 146         {
 147             HBRUSH brush = desktopPtr->hbrushPattern;
 148             if (!brush) brush = GetClassLongA( hwnd, GCL_HBRBACKGROUND );
 149             /* Set colors in case pattern is a monochrome bitmap */
 150             SetBkColor( hdc, RGB(0,0,0) );
 151             SetTextColor( hdc, GetSysColor(COLOR_BACKGROUND) );
 152             FillRect( hdc, &rect, brush );
 153         }
 154
 155         /* Paint wall paper */
 156
 157         if (desktopPtr->hbitmapWallPaper)
 158         {
 159             INT x, y;
 160             HDC hMemDC = CreateCompatibleDC( hdc );
 161
 162             SelectObject( hMemDC, desktopPtr->hbitmapWallPaper );
 163
 164             if (desktopPtr->fTileWallPaper)
 165             {
 166                 for (y = 0; y < rect.bottom; y += desktopPtr->bitmapSize.cy)
 167                     for (x = 0; x < rect.right; x += desktopPtr->bitmapSize.cx)
 168                         BitBlt( hdc, x, y, desktopPtr->bitmapSize.cx,
 169                                 desktopPtr->bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
 170             }
 171             else
 172             {
 173                 x = (rect.left + rect.right - desktopPtr->bitmapSize.cx) / 2;
 174                 y = (rect.top + rect.bottom - desktopPtr->bitmapSize.cy) / 2;
 175                 if (x < 0) x = 0;
 176                 if (y < 0) y = 0;
 177                 BitBlt( hdc, x, y, desktopPtr->bitmapSize.cx,
 178                         desktopPtr->bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
 179             }
 180             DeleteDC( hMemDC );
 181         }
 182     }
 183     WIN_ReleaseWndPtr(wndPtr);
 184     return TRUE;
 185 }
 186
 187 /***********************************************************************
 188  *           OldSetDeskPattern   (USER.279)
 189  */
 190 BOOL16 WINAPI SetDeskPattern(void)
 191 {
 192     char buffer[100];
 193     GetProfileStringA( "desktop", "Pattern", "(None)", buffer, 100 );
 194     return DESKTOP_SetPattern( buffer );
 195 }
 196
 197
 198 /***********************************************************************
 199  *           SetDeskWallPaper   (USER.285)
 200  */
 201 BOOL16 WINAPI SetDeskWallPaper16( LPCSTR filename )
 202 {
 203     return SetDeskWallPaper( filename );
 204 }
 205
 206
 207 /***********************************************************************
 208  *           SetDeskWallPaper   (USER32.@)
 209  *
 210  * FIXME: is there a unicode version?
 211  */
 212 BOOL WINAPI SetDeskWallPaper( LPCSTR filename )
 213 {
 214     HBITMAP hbitmap;
 215     HDC hdc;
 216     char buffer[256];
 217     WND *wndPtr = WIN_GetDesktop();
 218     DESKTOP *desktopPtr = (DESKTOP *)wndPtr->wExtra;
 219
 220     if (filename == (LPSTR)-1)
 221     {
 222         GetProfileStringA( "desktop", "WallPaper", "(None)", buffer, 256 );
 223         filename = buffer;
 224     }
 225     hdc = GetDC( 0 );
 226     hbitmap = DESKTOP_LoadBitmap( hdc, filename );
 227     ReleaseDC( 0, hdc );
 228     if (desktopPtr->hbitmapWallPaper) DeleteObject( desktopPtr->hbitmapWallPaper );
 229     desktopPtr->hbitmapWallPaper = hbitmap;
 230     desktopPtr->fTileWallPaper = GetProfileIntA( "desktop", "TileWallPaper", 0 );
 231     if (hbitmap)
 232     {
 233         BITMAP bmp;
 234         GetObjectA( hbitmap, sizeof(bmp), &bmp );
 235         desktopPtr->bitmapSize.cx = (bmp.bmWidth != 0) ? bmp.bmWidth : 1;
 236         desktopPtr->bitmapSize.cy = (bmp.bmHeight != 0) ? bmp.bmHeight : 1;
 237     }
 238     WIN_ReleaseDesktop();
 239     return TRUE;
 240 }
 241
 242
 243 /***********************************************************************
 244  *           DESKTOP_SetPattern
 245  *
 246  * Set the desktop pattern.
 247  */
 248 BOOL DESKTOP_SetPattern( LPCSTR pattern )
 249 {
 250     WND *wndPtr = WIN_GetDesktop();
 251     DESKTOP *desktopPtr = (DESKTOP *)wndPtr->wExtra;
 252     int pat[8];
 253
 254     if (desktopPtr->hbrushPattern) DeleteObject( desktopPtr->hbrushPattern );
 255     memset( pat, 0, sizeof(pat) );
 256     if (pattern && sscanf( pattern, " %d %d %d %d %d %d %d %d",
 257                            &pat[0], &pat[1], &pat[2], &pat[3],
 258                            &pat[4], &pat[5], &pat[6], &pat[7] ))
 259     {
 260         WORD pattern[8];
 261         HBITMAP hbitmap;
 262         int i;
 263
 264         for (i = 0; i < 8; i++) pattern[i] = pat[i] & 0xffff;
 265         hbitmap = CreateBitmap( 8, 8, 1, 1, (LPSTR)pattern );
 266         desktopPtr->hbrushPattern = CreatePatternBrush( hbitmap );
 267         DeleteObject( hbitmap );
 268     }
 269     else desktopPtr->hbrushPattern = 0;
 270     WIN_ReleaseDesktop();
 271     return TRUE;
 272 }
 273