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