wine/dlls/user32/desktop.c
2011-03-09 15:54:20 +01:00

243 lines
7.1 KiB
C

/*
* Desktop window class.
*
* Copyright 1994 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winnls.h"
#include "controls.h"
static HBRUSH hbrushPattern;
static HBITMAP hbitmapWallPaper;
static SIZE bitmapSize;
static BOOL fTileWallPaper;
/*********************************************************************
* desktop class descriptor
*/
const struct builtin_class_descr DESKTOP_builtin_class =
{
(LPCWSTR)DESKTOP_CLASS_ATOM, /* name */
CS_DBLCLKS, /* style */
WINPROC_DESKTOP, /* proc */
0, /* extra */
IDC_ARROW, /* cursor */
(HBRUSH)(COLOR_BACKGROUND+1) /* brush */
};
/***********************************************************************
* DESKTOP_LoadBitmap
*
* Load a bitmap from a file. Used by SetDeskWallPaper().
*/
static HBITMAP DESKTOP_LoadBitmap( HDC hdc, const char *filename )
{
BITMAPFILEHEADER *fileHeader;
BITMAPINFO *bitmapInfo;
HBITMAP hbitmap;
HFILE file;
LPSTR buffer;
LONG size;
/* Read all the file into memory */
if ((file = _lopen( filename, OF_READ )) == HFILE_ERROR)
{
UINT len = GetWindowsDirectoryA( NULL, 0 );
if (!(buffer = HeapAlloc( GetProcessHeap(), 0,
len + strlen(filename) + 2 )))
return 0;
GetWindowsDirectoryA( buffer, len + 1 );
strcat( buffer, "\\" );
strcat( buffer, filename );
file = _lopen( buffer, OF_READ );
HeapFree( GetProcessHeap(), 0, buffer );
}
if (file == HFILE_ERROR) return 0;
size = _llseek( file, 0, 2 );
if (!(buffer = HeapAlloc( GetProcessHeap(), 0, size )))
{
_lclose( file );
return 0;
}
_llseek( file, 0, 0 );
size = _lread( file, buffer, size );
_lclose( file );
fileHeader = (BITMAPFILEHEADER *)buffer;
bitmapInfo = (BITMAPINFO *)(buffer + sizeof(BITMAPFILEHEADER));
/* Check header content */
if ((fileHeader->bfType != 0x4d42) || (size < fileHeader->bfSize))
{
HeapFree( GetProcessHeap(), 0, buffer );
return 0;
}
hbitmap = CreateDIBitmap( hdc, &bitmapInfo->bmiHeader, CBM_INIT,
buffer + fileHeader->bfOffBits,
bitmapInfo, DIB_RGB_COLORS );
HeapFree( GetProcessHeap(), 0, buffer );
return hbitmap;
}
/***********************************************************************
* DesktopWndProc
*/
LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
{
if (message == WM_NCCREATE) return TRUE;
return 0; /* all other messages are ignored */
}
/***********************************************************************
* PaintDesktop (USER32.@)
*
*/
BOOL WINAPI PaintDesktop(HDC hdc)
{
HWND hwnd = GetDesktopWindow();
/* check for an owning thread; otherwise don't paint anything (non-desktop mode) */
if (GetWindowThreadProcessId( hwnd, NULL ))
{
RECT rect;
GetClientRect( hwnd, &rect );
/* Paint desktop pattern (only if wall paper does not cover everything) */
if (!hbitmapWallPaper ||
(!fTileWallPaper && ((bitmapSize.cx < rect.right) || (bitmapSize.cy < rect.bottom))))
{
HBRUSH brush = hbrushPattern;
if (!brush) brush = (HBRUSH)GetClassLongPtrW( hwnd, GCLP_HBRBACKGROUND );
/* Set colors in case pattern is a monochrome bitmap */
SetBkColor( hdc, RGB(0,0,0) );
SetTextColor( hdc, GetSysColor(COLOR_BACKGROUND) );
FillRect( hdc, &rect, brush );
}
/* Paint wall paper */
if (hbitmapWallPaper)
{
INT x, y;
HDC hMemDC = CreateCompatibleDC( hdc );
SelectObject( hMemDC, hbitmapWallPaper );
if (fTileWallPaper)
{
for (y = 0; y < rect.bottom; y += bitmapSize.cy)
for (x = 0; x < rect.right; x += bitmapSize.cx)
BitBlt( hdc, x, y, bitmapSize.cx, bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
}
else
{
x = (rect.left + rect.right - bitmapSize.cx) / 2;
y = (rect.top + rect.bottom - bitmapSize.cy) / 2;
if (x < 0) x = 0;
if (y < 0) y = 0;
BitBlt( hdc, x, y, bitmapSize.cx, bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
}
DeleteDC( hMemDC );
}
}
return TRUE;
}
/***********************************************************************
* SetDeskWallPaper (USER32.@)
*
* FIXME: is there a unicode version?
*/
BOOL WINAPI SetDeskWallPaper( LPCSTR filename )
{
HBITMAP hbitmap;
HDC hdc;
char buffer[256];
if (filename == (LPSTR)-1)
{
GetProfileStringA( "desktop", "WallPaper", "(None)", buffer, 256 );
filename = buffer;
}
hdc = GetDC( 0 );
hbitmap = DESKTOP_LoadBitmap( hdc, filename );
ReleaseDC( 0, hdc );
if (hbitmapWallPaper) DeleteObject( hbitmapWallPaper );
hbitmapWallPaper = hbitmap;
fTileWallPaper = GetProfileIntA( "desktop", "TileWallPaper", 0 );
if (hbitmap)
{
BITMAP bmp;
GetObjectA( hbitmap, sizeof(bmp), &bmp );
bitmapSize.cx = (bmp.bmWidth != 0) ? bmp.bmWidth : 1;
bitmapSize.cy = (bmp.bmHeight != 0) ? bmp.bmHeight : 1;
}
return TRUE;
}
/***********************************************************************
* DESKTOP_SetPattern
*
* Set the desktop pattern.
*/
BOOL DESKTOP_SetPattern( LPCWSTR pattern )
{
int pat[8];
if (hbrushPattern) DeleteObject( hbrushPattern );
hbrushPattern = 0;
memset( pat, 0, sizeof(pat) );
if (pattern)
{
char buffer[64];
WideCharToMultiByte( CP_ACP, 0, pattern, -1, buffer, sizeof(buffer), NULL, NULL );
if (sscanf( buffer, " %d %d %d %d %d %d %d %d",
&pat[0], &pat[1], &pat[2], &pat[3],
&pat[4], &pat[5], &pat[6], &pat[7] ))
{
WORD ptrn[8];
HBITMAP hbitmap;
int i;
for (i = 0; i < 8; i++) ptrn[i] = pat[i] & 0xffff;
hbitmap = CreateBitmap( 8, 8, 1, 1, ptrn );
hbrushPattern = CreatePatternBrush( hbitmap );
DeleteObject( hbitmap );
}
}
return TRUE;
}