| /* |
| * 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 <stdarg.h> |
| #include <X11/Xlib.h> |
| |
| #include "windef.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); |
| |
| |
| /************************************************************************* |
| * ScrollWindowEx (X11DRV.@) |
| * |
| * 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 hrgnTemp; |
| HDC hDC; |
| RECT rc, cliprc; |
| |
| TRACE( "%p, %d,%d hrgnUpdate=%p rcUpdate = %p %s %04x\n", |
| hwnd, dx, dy, hrgnUpdate, rcUpdate, wine_dbgstr_rect(rect), flags ); |
| TRACE( "clipRect = %s\n", wine_dbgstr_rect(clipRect)); |
| |
| GetClientRect(hwnd, &rc); |
| if (rect) IntersectRect(&rc, &rc, rect); |
| |
| if (clipRect) IntersectRect(&cliprc,&rc,clipRect); |
| else cliprc = rc; |
| |
| if( hrgnUpdate ) bOwnRgn = FALSE; |
| else if( bUpdate ) hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 ); |
| |
| hDC = GetDCEx( hwnd, 0, DCX_CACHE | DCX_USESTYLE ); |
| if (hDC) |
| { |
| enum x11drv_escape_codes code = X11DRV_START_EXPOSURES; |
| HRGN hrgn = 0; |
| |
| ExtEscape( hDC, X11DRV_ESCAPE, sizeof(code), (LPSTR)&code, 0, NULL ); |
| ScrollDC( hDC, dx, dy, &rc, &cliprc, hrgnUpdate, rcUpdate ); |
| code = X11DRV_END_EXPOSURES; |
| ExtEscape( hDC, X11DRV_ESCAPE, sizeof(code), (LPSTR)&code, sizeof(hrgn), (LPSTR)&hrgn ); |
| ReleaseDC( hwnd, hDC ); |
| if (hrgn) |
| { |
| 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 damage may have occurred during the scroll */ |
| hrgnTemp = CreateRectRgn( 0, 0, 0, 0 ); |
| retVal = GetUpdateRgn( hwnd, hrgnTemp, FALSE ); |
| if (retVal != NULLREGION) |
| { |
| HRGN hrgnClip = CreateRectRgnIndirect(&cliprc); |
| OffsetRgn( hrgnTemp, dx, dy ); |
| CombineRgn( hrgnTemp, hrgnTemp, hrgnClip, RGN_AND ); |
| RedrawWindow( hwnd, NULL, hrgnTemp, RDW_INVALIDATE | RDW_ERASE ); |
| DeleteObject( hrgnClip ); |
| } |
| 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, &rc)) |
| 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 ); |
| |
| return retVal; |
| } |