wine/dlls/user32/desktop.c
2012-12-03 18:24:34 +01:00

203 lines
6.3 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
*/
static HBITMAP DESKTOP_LoadBitmap( const WCHAR *filename )
{
HBITMAP hbitmap;
if (!filename[0]) return 0;
hbitmap = LoadImageW( 0, filename, IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION | LR_LOADFROMFILE );
if (!hbitmap)
{
WCHAR buffer[MAX_PATH];
UINT len = GetWindowsDirectoryW( buffer, MAX_PATH - 2 );
if (buffer[len - 1] != '\\') buffer[len++] = '\\';
lstrcpynW( buffer + len, filename, MAX_PATH - len );
hbitmap = LoadImageW( 0, buffer, IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION | LR_LOADFROMFILE );
}
return hbitmap;
}
/***********************************************************************
* init_wallpaper
*/
static void init_wallpaper( const WCHAR *wallpaper )
{
HBITMAP hbitmap = DESKTOP_LoadBitmap( wallpaper );
if (hbitmapWallPaper) DeleteObject( hbitmapWallPaper );
hbitmapWallPaper = hbitmap;
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;
fTileWallPaper = GetProfileIntA( "desktop", "TileWallPaper", 0 );
}
}
/***********************************************************************
* 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 )
{
return SystemParametersInfoA( SPI_SETDESKWALLPAPER, MAX_PATH, (void *)filename, SPIF_UPDATEINIFILE );
}
/***********************************************************************
* update_wallpaper
*/
BOOL update_wallpaper( const WCHAR *wallpaper, const WCHAR *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 );
}
}
init_wallpaper( wallpaper );
RedrawWindow( GetDesktopWindow(), 0, 0, RDW_INVALIDATE | RDW_ERASE | RDW_NOCHILDREN );
return TRUE;
}