Sweden-Number/dlls/x11drv/scroll.c

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/*
* Scroll windows and DCs
*
* Copyright 1993 David W. Metcalfe
* Copyright 1995, 1996 Alex Korobka
* Copyright 2001 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "ts_xlib.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "x11drv.h"
#include "win.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(scroll);
/*************************************************************************
* ScrollDC (X11DRV.@)
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*
* Only the hrgnUpdate is returned in device coordinates.
* rcUpdate must be returned in logical coordinates to comply with win API.
* FIXME: the doc explicitly states the opposite, to be checked
*/
BOOL X11DRV_ScrollDC( HDC hdc, INT dx, INT dy, const RECT *rc,
const RECT *clipRect, HRGN hrgnUpdate, LPRECT rcUpdate )
{
RECT rect, rClip, rDst;
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TRACE( "%p %d,%d hrgnUpdate=%p rcUpdate = %p\n", hdc, dx, dy, hrgnUpdate, rcUpdate );
if (clipRect) TRACE( "cliprc = (%ld,%ld,%ld,%ld)\n",
clipRect->left, clipRect->top, clipRect->right, clipRect->bottom );
if (rc) TRACE( "rc = (%ld,%ld,%ld,%ld)\n", rc->left, rc->top, rc->right, rc->bottom );
/* compute device clipping region (in device coordinates) */
if (rc) rect = *rc;
else GetClipBox( hdc, &rect );
if (clipRect)
{
rClip = *clipRect;
IntersectRect( &rClip, &rect, &rClip );
}
else rClip = rect;
rDst = rClip;
OffsetRect( &rDst, dx, dy );
IntersectRect( &rDst, &rDst, &rClip );
if (!IsRectEmpty(&rDst))
{
/* copy bits */
if (!BitBlt( hdc, rDst.left, rDst.top,
rDst.right - rDst.left, rDst.bottom - rDst.top,
hdc, rDst.left - dx, rDst.top - dy, SRCCOPY))
return FALSE;
}
/* compute update areas */
if (hrgnUpdate || rcUpdate)
{
HRGN hrgn = hrgnUpdate, hrgn2;
/* map everything to device coordinates */
LPtoDP( hdc, (LPPOINT)&rClip, 2 );
LPtoDP( hdc, (LPPOINT)&rDst, 2 );
hrgn2 = CreateRectRgnIndirect( &rDst );
if (hrgn) SetRectRgn( hrgn, rClip.left, rClip.top, rClip.right, rClip.bottom );
else hrgn = CreateRectRgn( rClip.left, rClip.top, rClip.right, rClip.bottom );
CombineRgn( hrgn, hrgn, hrgn2, RGN_DIFF );
if( rcUpdate )
{
GetRgnBox( hrgn, rcUpdate );
/* Put the rcUpdate in logical coordinate */
DPtoLP( hdc, (LPPOINT)rcUpdate, 2 );
}
if (!hrgnUpdate) DeleteObject( hrgn );
DeleteObject( hrgn2 );
}
return TRUE;
}
/*************************************************************************
* ScrollWindowEx (X11DRV.@)
*
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* Note: contrary to what the doc says, pixels that are scrolled from the
* outside of clipRect to the inside are NOT painted.
*
* Parameter are the same as in ScrollWindowEx, with the additional
* requirement that rect and clipRect are _valid_ pointers, to
* rectangles _within_ the client are. Moreover, there is something
* to scroll.
*/
INT X11DRV_ScrollWindowEx( HWND hwnd, INT dx, INT dy,
const RECT *rect, const RECT *clipRect,
HRGN hrgnUpdate, LPRECT rcUpdate, UINT flags )
{
INT retVal;
BOOL bOwnRgn = TRUE;
BOOL bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE));
HRGN hrgnClip = CreateRectRgnIndirect(clipRect);
HRGN hrgnTemp;
HDC hDC;
TRACE( "%p, %d,%d hrgnUpdate=%p rcUpdate = %p rect=(%ld,%ld-%ld,%ld) %04x\n",
hwnd, dx, dy, hrgnUpdate, rcUpdate,
rect->left, rect->top, rect->right, rect->bottom, flags );
TRACE( "clipRect = (%ld,%ld,%ld,%ld)\n",
clipRect->left, clipRect->top, clipRect->right, clipRect->bottom );
if( hrgnUpdate ) bOwnRgn = FALSE;
else if( bUpdate ) hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 );
hDC = GetDCEx( hwnd, 0, DCX_CACHE | DCX_USESTYLE );
if (hDC)
{
HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
X11DRV_StartGraphicsExposures( hDC );
X11DRV_ScrollDC( hDC, dx, dy, rect, clipRect, hrgnUpdate, rcUpdate );
X11DRV_EndGraphicsExposures( hDC, hrgn );
ReleaseDC( hwnd, hDC );
if (bUpdate) CombineRgn( hrgnUpdate, hrgnUpdate, hrgn, RGN_OR );
else RedrawWindow( hwnd, NULL, hrgn, RDW_INVALIDATE | RDW_ERASE );
DeleteObject( hrgn );
}
/* Take into account the fact that some damages may have occured during the scroll */
hrgnTemp = CreateRectRgn( 0, 0, 0, 0 );
retVal = GetUpdateRgn( hwnd, hrgnTemp, FALSE );
if (retVal != NULLREGION)
{
OffsetRgn( hrgnTemp, dx, dy );
CombineRgn( hrgnTemp, hrgnTemp, hrgnClip, RGN_AND );
RedrawWindow( hwnd, NULL, hrgnTemp, RDW_INVALIDATE | RDW_ERASE );
}
DeleteObject( hrgnTemp );
if( flags & SW_SCROLLCHILDREN )
{
HWND *list = WIN_ListChildren( hwnd );
if (list)
{
int i;
RECT r, dummy;
for (i = 0; list[i]; i++)
{
GetWindowRect( list[i], &r );
MapWindowPoints( 0, hwnd, (POINT *)&r, 2 );
if (!rect || IntersectRect(&dummy, &r, rect))
SetWindowPos( list[i], 0, r.left + dx, r.top + dy, 0, 0,
SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE |
SWP_NOREDRAW | SWP_DEFERERASE );
}
HeapFree( GetProcessHeap(), 0, list );
}
}
if( flags & (SW_INVALIDATE | SW_ERASE) )
RedrawWindow( hwnd, NULL, hrgnUpdate, RDW_INVALIDATE | RDW_ERASE |
((flags & SW_ERASE) ? RDW_ERASENOW : 0) |
((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0 ) );
if( bOwnRgn && hrgnUpdate ) DeleteObject( hrgnUpdate );
DeleteObject( hrgnClip );
return retVal;
}