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