controls/desktop.c

   1 /*
   2  * Desktop window class.
   3  *
   4  * Copyright 1994 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 #include "windef.h"
  26 #include "wingdi.h"
  27 #include "user.h"
  28 #include "controls.h"
  29 #include "wine/winuser16.h"
  30
  31 static HBRUSH hbrushPattern;
  32 static HBITMAP hbitmapWallPaper;
  33 static SIZE bitmapSize;
  34 static BOOL fTileWallPaper;
  35
  36 static LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam );
  37
  38
  39 /*********************************************************************
  40  * desktop class descriptor
  41  */
  42 const struct builtin_class_descr DESKTOP_builtin_class =
  43 {
  44     DESKTOP_CLASS_ATOM,   /* name */
  45     CS_GLOBALCLASS,       /* style */
  46     NULL,                 /* procA (winproc is Unicode only) */
  47     DesktopWndProc,       /* procW */
  48     0,                    /* extra */
  49     IDC_ARROWA,           /* cursor */
  50     COLOR_BACKGROUND+1    /* brush */
  51 };
  52
  53
  54 /***********************************************************************
  55  *           DESKTOP_LoadBitmap
  56  *
  57  * Load a bitmap from a file. Used by SetDeskWallPaper().
  58  */
  59 static HBITMAP DESKTOP_LoadBitmap( HDC hdc, const char *filename )
  60 {
  61     BITMAPFILEHEADER *fileHeader;
  62     BITMAPINFO *bitmapInfo;
  63     HBITMAP hbitmap;
  64     HFILE file;
  65     LPSTR buffer;
  66     LONG size;
  67
  68     /* Read all the file into memory */
  69
  70     if ((file = _lopen( filename, OF_READ )) == HFILE_ERROR)
  71     {
  72         UINT len = GetWindowsDirectoryA( NULL, 0 );
  73         if (!(buffer = HeapAlloc( GetProcessHeap(), 0,
  74                                   len + strlen(filename) + 2 )))
  75             return 0;
  76         GetWindowsDirectoryA( buffer, len + 1 );
  77         strcat( buffer, "\\" );
  78         strcat( buffer, filename );
  79         file = _lopen( buffer, OF_READ );
  80         HeapFree( GetProcessHeap(), 0, buffer );
  81     }
  82     if (file == HFILE_ERROR) return 0;
  83     size = _llseek( file, 0, 2 );
  84     if (!(buffer = HeapAlloc( GetProcessHeap(), 0, size )))
  85     {
  86         _lclose( file );
  87         return 0;
  88     }
  89     _llseek( file, 0, 0 );
  90     size = _lread( file, buffer, size );
  91     _lclose( file );
  92     fileHeader = (BITMAPFILEHEADER *)buffer;
  93     bitmapInfo = (BITMAPINFO *)(buffer + sizeof(BITMAPFILEHEADER));
  94
  95       /* Check header content */
  96     if ((fileHeader->bfType != 0x4d42) || (size < fileHeader->bfSize))
  97     {
  98         HeapFree( GetProcessHeap(), 0, buffer );
  99         return 0;
 100     }
 101     hbitmap = CreateDIBitmap( hdc, &bitmapInfo->bmiHeader, CBM_INIT,
 102                                 buffer + fileHeader->bfOffBits,
 103                                 bitmapInfo, DIB_RGB_COLORS );
 104     HeapFree( GetProcessHeap(), 0, buffer );
 105     return hbitmap;
 106 }
 107
 108
 109
 110 /***********************************************************************
 111  *           DesktopWndProc
 112  */
 113 static LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
 114 {
 115     LRESULT retvalue = 0;
 116
 117     if (message == WM_NCCREATE)
 118     {
 119         hbrushPattern = 0;
 120         hbitmapWallPaper = 0;
 121         SetDeskPattern();
 122         SetDeskWallPaper( (LPSTR)-1 );
 123         retvalue = 1;
 124     }
 125     /* all other messages are ignored */
 126     return retvalue;
 127 }
 128
 129 /***********************************************************************
 130  *           PaintDesktop   (USER32.@)
 131  *
 132  */
 133 BOOL WINAPI PaintDesktop(HDC hdc)
 134 {
 135     HWND hwnd = GetDesktopWindow();
 136
 137     /* check for an owning thread; otherwise don't paint anything (non-desktop mode) */
 138     if (GetWindowThreadProcessId( hwnd, NULL ))
 139     {
 140         RECT rect;
 141
 142         GetClientRect( hwnd, &rect );
 143
 144         /* Paint desktop pattern (only if wall paper does not cover everything) */
 145
 146         if (!hbitmapWallPaper ||
 147             (!fTileWallPaper && ((bitmapSize.cx < rect.right) || (bitmapSize.cy < rect.bottom))))
 148         {
 149             HBRUSH brush = hbrushPattern;
 150             if (!brush) brush = GetClassLongA( hwnd, GCL_HBRBACKGROUND );
 151             /* Set colors in case pattern is a monochrome bitmap */
 152             SetBkColor( hdc, RGB(0,0,0) );
 153             SetTextColor( hdc, GetSysColor(COLOR_BACKGROUND) );
 154             FillRect( hdc, &rect, brush );
 155         }
 156
 157         /* Paint wall paper */
 158
 159         if (hbitmapWallPaper)
 160         {
 161             INT x, y;
 162             HDC hMemDC = CreateCompatibleDC( hdc );
 163
 164             SelectObject( hMemDC, hbitmapWallPaper );
 165
 166             if (fTileWallPaper)
 167             {
 168                 for (y = 0; y < rect.bottom; y += bitmapSize.cy)
 169                     for (x = 0; x < rect.right; x += bitmapSize.cx)
 170                         BitBlt( hdc, x, y, bitmapSize.cx, bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
 171             }
 172             else
 173             {
 174                 x = (rect.left + rect.right - bitmapSize.cx) / 2;
 175                 y = (rect.top + rect.bottom - bitmapSize.cy) / 2;
 176                 if (x < 0) x = 0;
 177                 if (y < 0) y = 0;
 178                 BitBlt( hdc, x, y, bitmapSize.cx, bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
 179             }
 180             DeleteDC( hMemDC );
 181         }
 182     }
 183     return TRUE;
 184 }
 185
 186 /***********************************************************************
 187  *           OldSetDeskPattern   (USER.279)
 188  */
 189 BOOL16 WINAPI SetDeskPattern(void)
 190 {
 191     char buffer[100];
 192     GetProfileStringA( "desktop", "Pattern", "(None)", buffer, 100 );
 193     return DESKTOP_SetPattern( buffer );
 194 }
 195
 196
 197 /***********************************************************************
 198  *           SetDeskWallPaper   (USER.285)
 199  */
 200 BOOL16 WINAPI SetDeskWallPaper16( LPCSTR filename )
 201 {
 202     return SetDeskWallPaper( filename );
 203 }
 204
 205
 206 /***********************************************************************
 207  *           SetDeskWallPaper   (USER32.@)
 208  *
 209  * FIXME: is there a unicode version?
 210  */
 211 BOOL WINAPI SetDeskWallPaper( LPCSTR filename )
 212 {
 213     HBITMAP hbitmap;
 214     HDC hdc;
 215     char buffer[256];
 216
 217     if (filename == (LPSTR)-1)
 218     {
 219         GetProfileStringA( "desktop", "WallPaper", "(None)", buffer, 256 );
 220         filename = buffer;
 221     }
 222     hdc = GetDC( 0 );
 223     hbitmap = DESKTOP_LoadBitmap( hdc, filename );
 224     ReleaseDC( 0, hdc );
 225     if (hbitmapWallPaper) DeleteObject( hbitmapWallPaper );
 226     hbitmapWallPaper = hbitmap;
 227     fTileWallPaper = GetProfileIntA( "desktop", "TileWallPaper", 0 );
 228     if (hbitmap)
 229     {
 230         BITMAP bmp;
 231         GetObjectA( hbitmap, sizeof(bmp), &bmp );
 232         bitmapSize.cx = (bmp.bmWidth != 0) ? bmp.bmWidth : 1;
 233         bitmapSize.cy = (bmp.bmHeight != 0) ? bmp.bmHeight : 1;
 234     }
 235     return TRUE;
 236 }
 237
 238
 239 /***********************************************************************
 240  *           DESKTOP_SetPattern
 241  *
 242  * Set the desktop pattern.
 243  */
 244 BOOL DESKTOP_SetPattern( LPCSTR pattern )
 245 {
 246     int pat[8];
 247
 248     if (hbrushPattern) DeleteObject( hbrushPattern );
 249     memset( pat, 0, sizeof(pat) );
 250     if (pattern && sscanf( pattern, " %d %d %d %d %d %d %d %d",
 251                            &pat[0], &pat[1], &pat[2], &pat[3],
 252                            &pat[4], &pat[5], &pat[6], &pat[7] ))
 253     {
 254         WORD pattern[8];
 255         HBITMAP hbitmap;
 256         int i;
 257
 258         for (i = 0; i < 8; i++) pattern[i] = pat[i] & 0xffff;
 259         hbitmap = CreateBitmap( 8, 8, 1, 1, (LPSTR)pattern );
 260         hbrushPattern = CreatePatternBrush( hbitmap );
 261         DeleteObject( hbitmap );
 262     }
 263     else hbrushPattern = 0;
 264     return TRUE;
 265 }
 266