| /* |
| * Window painting functions |
| * |
| * Copyright 1993, 1994, 1995, 2001, 2004 Alexandre Julliard |
| * Copyright 1999 Alex Korobka |
| * |
| * 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 "wine/port.h" |
| |
| #include <stdarg.h> |
| #include <string.h> |
| |
| #include "windef.h" |
| #include "winbase.h" |
| #include "wingdi.h" |
| #include "ntstatus.h" |
| #include "winuser.h" |
| #include "wine/server.h" |
| #include "win.h" |
| #include "user_private.h" |
| #include "wine/debug.h" |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(win); |
| |
| |
| /*********************************************************************** |
| * dump_rdw_flags |
| */ |
| static void dump_rdw_flags(UINT flags) |
| { |
| TRACE("flags:"); |
| if (flags & RDW_INVALIDATE) TRACE(" RDW_INVALIDATE"); |
| if (flags & RDW_INTERNALPAINT) TRACE(" RDW_INTERNALPAINT"); |
| if (flags & RDW_ERASE) TRACE(" RDW_ERASE"); |
| if (flags & RDW_VALIDATE) TRACE(" RDW_VALIDATE"); |
| if (flags & RDW_NOINTERNALPAINT) TRACE(" RDW_NOINTERNALPAINT"); |
| if (flags & RDW_NOERASE) TRACE(" RDW_NOERASE"); |
| if (flags & RDW_NOCHILDREN) TRACE(" RDW_NOCHILDREN"); |
| if (flags & RDW_ALLCHILDREN) TRACE(" RDW_ALLCHILDREN"); |
| if (flags & RDW_UPDATENOW) TRACE(" RDW_UPDATENOW"); |
| if (flags & RDW_ERASENOW) TRACE(" RDW_ERASENOW"); |
| if (flags & RDW_FRAME) TRACE(" RDW_FRAME"); |
| if (flags & RDW_NOFRAME) TRACE(" RDW_NOFRAME"); |
| |
| #define RDW_FLAGS \ |
| (RDW_INVALIDATE | \ |
| RDW_INTERNALPAINT | \ |
| RDW_ERASE | \ |
| RDW_VALIDATE | \ |
| RDW_NOINTERNALPAINT | \ |
| RDW_NOERASE | \ |
| RDW_NOCHILDREN | \ |
| RDW_ALLCHILDREN | \ |
| RDW_UPDATENOW | \ |
| RDW_ERASENOW | \ |
| RDW_FRAME | \ |
| RDW_NOFRAME) |
| |
| if (flags & ~RDW_FLAGS) TRACE(" %04x", flags & ~RDW_FLAGS); |
| TRACE("\n"); |
| #undef RDW_FLAGS |
| } |
| |
| |
| /*********************************************************************** |
| * get_update_region |
| * |
| * Return update region (in screen coordinates) for a window. |
| */ |
| static HRGN get_update_region( HWND hwnd, UINT *flags, HWND *child ) |
| { |
| HRGN hrgn = 0; |
| NTSTATUS status; |
| RGNDATA *data; |
| size_t size = 256; |
| |
| do |
| { |
| if (!(data = HeapAlloc( GetProcessHeap(), 0, sizeof(*data) + size - 1 ))) |
| { |
| SetLastError( ERROR_OUTOFMEMORY ); |
| return 0; |
| } |
| |
| SERVER_START_REQ( get_update_region ) |
| { |
| req->window = hwnd; |
| req->from_child = child ? *child : 0; |
| req->flags = *flags; |
| wine_server_set_reply( req, data->Buffer, size ); |
| if (!(status = wine_server_call( req ))) |
| { |
| size_t reply_size = wine_server_reply_size( reply ); |
| data->rdh.dwSize = sizeof(data->rdh); |
| data->rdh.iType = RDH_RECTANGLES; |
| data->rdh.nCount = reply_size / sizeof(RECT); |
| data->rdh.nRgnSize = reply_size; |
| hrgn = ExtCreateRegion( NULL, size, data ); |
| if (child) *child = reply->child; |
| *flags = reply->flags; |
| } |
| else size = reply->total_size; |
| } |
| SERVER_END_REQ; |
| HeapFree( GetProcessHeap(), 0, data ); |
| } while (status == STATUS_BUFFER_OVERFLOW); |
| |
| if (status) SetLastError( RtlNtStatusToDosError(status) ); |
| return hrgn; |
| } |
| |
| |
| /*********************************************************************** |
| * get_update_flags |
| * |
| * Get only the update flags, not the update region. |
| */ |
| static BOOL get_update_flags( HWND hwnd, HWND *child, UINT *flags ) |
| { |
| BOOL ret; |
| |
| SERVER_START_REQ( get_update_region ) |
| { |
| req->window = hwnd; |
| req->from_child = child ? *child : 0; |
| req->flags = *flags | UPDATE_NOREGION; |
| if ((ret = !wine_server_call_err( req ))) |
| { |
| if (child) *child = reply->child; |
| *flags = reply->flags; |
| } |
| } |
| SERVER_END_REQ; |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * redraw_window_rects |
| * |
| * Redraw part of a window. |
| */ |
| static BOOL redraw_window_rects( HWND hwnd, UINT flags, const RECT *rects, UINT count ) |
| { |
| BOOL ret; |
| |
| SERVER_START_REQ( redraw_window ) |
| { |
| req->window = hwnd; |
| req->flags = flags; |
| wine_server_add_data( req, rects, count * sizeof(RECT) ); |
| ret = !wine_server_call_err( req ); |
| } |
| SERVER_END_REQ; |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * send_ncpaint |
| * |
| * Send a WM_NCPAINT message if needed, and return the resulting update region (in screen coords). |
| * Helper for erase_now and BeginPaint. |
| */ |
| static HRGN send_ncpaint( HWND hwnd, HWND *child, UINT *flags ) |
| { |
| HRGN whole_rgn = get_update_region( hwnd, flags, child ); |
| HRGN client_rgn = 0; |
| |
| if (child) hwnd = *child; |
| |
| if (whole_rgn) |
| { |
| RECT client, update; |
| INT type; |
| |
| /* check if update rgn overlaps with nonclient area */ |
| type = GetRgnBox( whole_rgn, &update ); |
| GetClientRect( hwnd, &client ); |
| MapWindowPoints( hwnd, 0, (POINT *)&client, 2 ); |
| |
| if ((*flags & UPDATE_NONCLIENT) || |
| update.left < client.left || update.top < client.top || |
| update.right > client.right || update.bottom > client.bottom) |
| { |
| client_rgn = CreateRectRgnIndirect( &client ); |
| CombineRgn( client_rgn, client_rgn, whole_rgn, RGN_AND ); |
| |
| /* check if update rgn contains complete nonclient area */ |
| if (type == SIMPLEREGION) |
| { |
| RECT window; |
| GetWindowRect( hwnd, &window ); |
| if (EqualRect( &window, &update )) |
| { |
| DeleteObject( whole_rgn ); |
| whole_rgn = (HRGN)1; |
| } |
| } |
| } |
| else |
| { |
| client_rgn = whole_rgn; |
| whole_rgn = 0; |
| } |
| |
| if (whole_rgn) /* NOTE: WM_NCPAINT allows wParam to be 1 */ |
| { |
| if (*flags & UPDATE_NONCLIENT) SendMessageW( hwnd, WM_NCPAINT, (WPARAM)whole_rgn, 0 ); |
| if (whole_rgn > (HRGN)1) DeleteObject( whole_rgn ); |
| } |
| } |
| return client_rgn; |
| } |
| |
| |
| /*********************************************************************** |
| * send_erase |
| * |
| * Send a WM_ERASEBKGND message if needed, and optionally return the DC for painting. |
| * If a DC is requested, the region is selected into it. In all cases the region is deleted. |
| * Helper for erase_now and BeginPaint. |
| */ |
| static BOOL send_erase( HWND hwnd, UINT flags, HRGN client_rgn, |
| RECT *clip_rect, HDC *hdc_ret ) |
| { |
| BOOL need_erase = FALSE; |
| HDC hdc = 0; |
| RECT dummy; |
| |
| if (!clip_rect) clip_rect = &dummy; |
| if (hdc_ret || (flags & UPDATE_ERASE)) |
| { |
| UINT dcx_flags = DCX_INTERSECTRGN | DCX_USESTYLE; |
| if (IsIconic(hwnd)) dcx_flags |= DCX_WINDOW; |
| |
| if ((hdc = GetDCEx( hwnd, client_rgn, dcx_flags ))) |
| { |
| INT type = GetClipBox( hdc, clip_rect ); |
| |
| if (flags & UPDATE_ERASE) |
| { |
| /* don't erase if the clip box is empty */ |
| if (type != NULLREGION) |
| need_erase = !SendMessageW( hwnd, WM_ERASEBKGND, (WPARAM)hdc, 0 ); |
| } |
| if (!hdc_ret) |
| { |
| if (need_erase && hwnd != GetDesktopWindow()) /* FIXME: mark it as needing erase again */ |
| RedrawWindow( hwnd, clip_rect, 0, RDW_INVALIDATE | RDW_ERASE | RDW_NOCHILDREN ); |
| USER_Driver->pReleaseDC( hwnd, hdc, TRUE ); |
| } |
| } |
| |
| if (hdc_ret) *hdc_ret = hdc; |
| } |
| if (!hdc) DeleteObject( client_rgn ); |
| return need_erase; |
| } |
| |
| |
| /*********************************************************************** |
| * erase_now |
| * |
| * Implementation of RDW_ERASENOW behavior. |
| */ |
| static void erase_now( HWND hwnd, UINT rdw_flags ) |
| { |
| HWND child = 0; |
| HRGN hrgn; |
| |
| /* loop while we find a child to repaint */ |
| for (;;) |
| { |
| UINT flags = UPDATE_NONCLIENT | UPDATE_ERASE; |
| |
| if (rdw_flags & RDW_NOCHILDREN) flags |= UPDATE_NOCHILDREN; |
| else if (rdw_flags & RDW_ALLCHILDREN) flags |= UPDATE_ALLCHILDREN; |
| |
| if (!(hrgn = send_ncpaint( hwnd, &child, &flags ))) break; |
| send_erase( child, flags, hrgn, NULL, NULL ); |
| |
| if (!flags) break; /* nothing more to do */ |
| if (rdw_flags & RDW_NOCHILDREN) break; |
| } |
| } |
| |
| |
| /*********************************************************************** |
| * update_now |
| * |
| * Implementation of RDW_UPDATENOW behavior. |
| * |
| * FIXME: Windows uses WM_SYNCPAINT to cut down the number of intertask |
| * SendMessage() calls. This is a comment inside DefWindowProc() source |
| * from 16-bit SDK: |
| * |
| * This message avoids lots of inter-app message traffic |
| * by switching to the other task and continuing the |
| * recursion there. |
| * |
| * wParam = flags |
| * LOWORD(lParam) = hrgnClip |
| * HIWORD(lParam) = hwndSkip (not used; always NULL) |
| * |
| */ |
| static void update_now( HWND hwnd, UINT rdw_flags ) |
| { |
| HWND child = 0; |
| |
| /* desktop window never gets WM_PAINT, only WM_ERASEBKGND */ |
| if (hwnd == GetDesktopWindow()) erase_now( hwnd, rdw_flags | RDW_NOCHILDREN ); |
| |
| /* loop while we find a child to repaint */ |
| for (;;) |
| { |
| UINT flags = UPDATE_PAINT | UPDATE_INTERNALPAINT; |
| |
| if (rdw_flags & RDW_NOCHILDREN) flags |= UPDATE_NOCHILDREN; |
| else if (rdw_flags & RDW_ALLCHILDREN) flags |= UPDATE_ALLCHILDREN; |
| |
| if (!get_update_flags( hwnd, &child, &flags )) break; |
| if (!flags) break; /* nothing more to do */ |
| |
| SendMessageW( child, WM_PAINT, 0, 0 ); |
| if (rdw_flags & RDW_NOCHILDREN) break; |
| } |
| } |
| |
| |
| /************************************************************************* |
| * fix_caret |
| * |
| * Helper for ScrollWindowEx. |
| */ |
| static HWND fix_caret(HWND hWnd, LPRECT lprc, UINT flags) |
| { |
| GUITHREADINFO info; |
| |
| if (!GetGUIThreadInfo( GetCurrentThreadId(), &info )) return 0; |
| if (!info.hwndCaret) return 0; |
| if (info.hwndCaret == hWnd || |
| ((flags & SW_SCROLLCHILDREN) && IsChild(hWnd, info.hwndCaret))) |
| { |
| POINT pt; |
| pt.x = info.rcCaret.left; |
| pt.y = info.rcCaret.top; |
| MapWindowPoints( info.hwndCaret, hWnd, (LPPOINT)&info.rcCaret, 2 ); |
| if( IntersectRect(lprc, lprc, &info.rcCaret) ) |
| { |
| HideCaret(0); |
| lprc->left = pt.x; |
| lprc->top = pt.y; |
| return info.hwndCaret; |
| } |
| } |
| return 0; |
| } |
| |
| |
| /*********************************************************************** |
| * BeginPaint (USER32.@) |
| */ |
| HDC WINAPI BeginPaint( HWND hwnd, PAINTSTRUCT *lps ) |
| { |
| HWND full_handle; |
| HRGN hrgn; |
| UINT flags = UPDATE_NONCLIENT | UPDATE_ERASE | UPDATE_PAINT | UPDATE_INTERNALPAINT | UPDATE_NOCHILDREN; |
| |
| if (!lps) return 0; |
| |
| if (!(full_handle = WIN_IsCurrentThread( hwnd ))) |
| { |
| if (IsWindow(hwnd)) |
| FIXME( "window %p belongs to other thread\n", hwnd ); |
| return 0; |
| } |
| hwnd = full_handle; |
| |
| HideCaret( hwnd ); |
| |
| if (!(hrgn = send_ncpaint( hwnd, NULL, &flags ))) return 0; |
| |
| lps->fErase = send_erase( hwnd, flags, hrgn, &lps->rcPaint, &lps->hdc ); |
| |
| TRACE("hdc = %p box = (%ld,%ld - %ld,%ld), fErase = %d\n", |
| lps->hdc, lps->rcPaint.left, lps->rcPaint.top, lps->rcPaint.right, lps->rcPaint.bottom, |
| lps->fErase); |
| |
| return lps->hdc; |
| } |
| |
| |
| /*********************************************************************** |
| * EndPaint (USER32.@) |
| */ |
| BOOL WINAPI EndPaint( HWND hwnd, const PAINTSTRUCT *lps ) |
| { |
| if (!lps) return FALSE; |
| USER_Driver->pReleaseDC( hwnd, lps->hdc, TRUE ); |
| ShowCaret( hwnd ); |
| return TRUE; |
| } |
| |
| |
| /*********************************************************************** |
| * GetDCEx (USER32.@) |
| */ |
| HDC WINAPI GetDCEx( HWND hwnd, HRGN hrgnClip, DWORD flags ) |
| { |
| if (!hwnd) hwnd = GetDesktopWindow(); |
| else hwnd = WIN_GetFullHandle( hwnd ); |
| |
| return USER_Driver->pGetDCEx( hwnd, hrgnClip, flags ); |
| } |
| |
| |
| /*********************************************************************** |
| * GetDC (USER32.@) |
| * |
| * Get a device context. |
| * |
| * RETURNS |
| * Success: Handle to the device context |
| * Failure: NULL. |
| */ |
| HDC WINAPI GetDC( HWND hwnd ) |
| { |
| if (!hwnd) return GetDCEx( 0, 0, DCX_CACHE | DCX_WINDOW ); |
| return GetDCEx( hwnd, 0, DCX_USESTYLE ); |
| } |
| |
| |
| /*********************************************************************** |
| * GetWindowDC (USER32.@) |
| */ |
| HDC WINAPI GetWindowDC( HWND hwnd ) |
| { |
| return GetDCEx( hwnd, 0, DCX_USESTYLE | DCX_WINDOW ); |
| } |
| |
| |
| /*********************************************************************** |
| * ReleaseDC (USER32.@) |
| * |
| * Release a device context. |
| * |
| * RETURNS |
| * Success: Non-zero. Resources used by hdc are released. |
| * Failure: 0. |
| */ |
| INT WINAPI ReleaseDC( HWND hwnd, HDC hdc ) |
| { |
| return USER_Driver->pReleaseDC( hwnd, hdc, FALSE ); |
| } |
| |
| |
| /********************************************************************** |
| * WindowFromDC (USER32.@) |
| */ |
| HWND WINAPI WindowFromDC( HDC hDC ) |
| { |
| return USER_Driver->pWindowFromDC( hDC ); |
| } |
| |
| |
| /*********************************************************************** |
| * LockWindowUpdate (USER32.@) |
| */ |
| BOOL WINAPI LockWindowUpdate( HWND hwnd ) |
| { |
| static HWND lockedWnd; |
| |
| /* This function is fully implemented by the following patch: |
| * |
| * http://www.winehq.org/hypermail/wine-patches/2004/01/0142.html |
| * |
| * but in order to work properly, it needs the ability to invalidate |
| * DCEs in other processes when the lock window is changed, which |
| * isn't possible yet. |
| * -mike |
| */ |
| |
| FIXME("(%p), partial stub!\n",hwnd); |
| |
| USER_Lock(); |
| if (lockedWnd) |
| { |
| if (!hwnd) |
| { |
| /* Unlock lockedWnd */ |
| /* FIXME: Do something */ |
| } |
| else |
| { |
| /* Attempted to lock a second window */ |
| /* Return FALSE and do nothing */ |
| USER_Unlock(); |
| return FALSE; |
| } |
| } |
| lockedWnd = hwnd; |
| USER_Unlock(); |
| return TRUE; |
| } |
| |
| |
| /*********************************************************************** |
| * RedrawWindow (USER32.@) |
| */ |
| BOOL WINAPI RedrawWindow( HWND hwnd, const RECT *rect, HRGN hrgn, UINT flags ) |
| { |
| BOOL ret; |
| |
| if (!hwnd) hwnd = GetDesktopWindow(); |
| |
| if (TRACE_ON(win)) |
| { |
| if (hrgn) |
| { |
| RECT r; |
| GetRgnBox( hrgn, &r ); |
| TRACE( "%p region %p box %s ", hwnd, hrgn, wine_dbgstr_rect(&r) ); |
| } |
| else if (rect) |
| TRACE( "%p rect %s ", hwnd, wine_dbgstr_rect(rect) ); |
| else |
| TRACE( "%p whole window ", hwnd ); |
| |
| dump_rdw_flags(flags); |
| } |
| |
| /* process pending expose events before painting */ |
| if (flags & RDW_UPDATENOW) USER_Driver->pMsgWaitForMultipleObjectsEx( 0, NULL, 0, QS_PAINT, 0 ); |
| |
| if (rect && !hrgn) |
| { |
| ret = redraw_window_rects( hwnd, flags, rect, 1 ); |
| } |
| else if (!hrgn) |
| { |
| ret = redraw_window_rects( hwnd, flags, NULL, 0 ); |
| } |
| else /* need to build a list of the region rectangles */ |
| { |
| DWORD size; |
| RGNDATA *data = NULL; |
| static const RECT empty; |
| |
| if (!(size = GetRegionData( hrgn, 0, NULL ))) return FALSE; |
| if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return FALSE; |
| GetRegionData( hrgn, size, data ); |
| if (!data->rdh.nCount) /* empty region -> use a single all-zero rectangle */ |
| ret = redraw_window_rects( hwnd, flags, &empty, 1 ); |
| else |
| ret = redraw_window_rects( hwnd, flags, (const RECT *)data->Buffer, data->rdh.nCount ); |
| HeapFree( GetProcessHeap(), 0, data ); |
| } |
| |
| if (flags & RDW_UPDATENOW) update_now( hwnd, flags ); |
| else if (flags & RDW_ERASENOW) erase_now( hwnd, flags ); |
| |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * UpdateWindow (USER32.@) |
| */ |
| BOOL WINAPI UpdateWindow( HWND hwnd ) |
| { |
| return RedrawWindow( hwnd, NULL, 0, RDW_UPDATENOW | RDW_ALLCHILDREN ); |
| } |
| |
| |
| /*********************************************************************** |
| * InvalidateRgn (USER32.@) |
| */ |
| BOOL WINAPI InvalidateRgn( HWND hwnd, HRGN hrgn, BOOL erase ) |
| { |
| return RedrawWindow(hwnd, NULL, hrgn, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) ); |
| } |
| |
| |
| /*********************************************************************** |
| * InvalidateRect (USER32.@) |
| */ |
| BOOL WINAPI InvalidateRect( HWND hwnd, const RECT *rect, BOOL erase ) |
| { |
| return RedrawWindow( hwnd, rect, 0, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) ); |
| } |
| |
| |
| /*********************************************************************** |
| * ValidateRgn (USER32.@) |
| */ |
| BOOL WINAPI ValidateRgn( HWND hwnd, HRGN hrgn ) |
| { |
| return RedrawWindow( hwnd, NULL, hrgn, RDW_VALIDATE ); |
| } |
| |
| |
| /*********************************************************************** |
| * ValidateRect (USER32.@) |
| */ |
| BOOL WINAPI ValidateRect( HWND hwnd, const RECT *rect ) |
| { |
| return RedrawWindow( hwnd, rect, 0, RDW_VALIDATE ); |
| } |
| |
| |
| /*********************************************************************** |
| * GetUpdateRgn (USER32.@) |
| */ |
| INT WINAPI GetUpdateRgn( HWND hwnd, HRGN hrgn, BOOL erase ) |
| { |
| INT retval = ERROR; |
| UINT flags = UPDATE_NOCHILDREN; |
| HRGN update_rgn; |
| |
| if (erase) flags |= UPDATE_NONCLIENT | UPDATE_ERASE; |
| |
| if ((update_rgn = send_ncpaint( hwnd, NULL, &flags ))) |
| { |
| POINT offset; |
| |
| retval = CombineRgn( hrgn, update_rgn, 0, RGN_COPY ); |
| send_erase( hwnd, flags, update_rgn, NULL, NULL ); |
| /* map region to client coordinates */ |
| offset.x = offset.y = 0; |
| ScreenToClient( hwnd, &offset ); |
| OffsetRgn( hrgn, offset.x, offset.y ); |
| } |
| return retval; |
| } |
| |
| |
| /*********************************************************************** |
| * GetUpdateRect (USER32.@) |
| */ |
| BOOL WINAPI GetUpdateRect( HWND hwnd, LPRECT rect, BOOL erase ) |
| { |
| UINT flags = UPDATE_NOCHILDREN; |
| HRGN update_rgn; |
| |
| if (erase) flags |= UPDATE_NONCLIENT | UPDATE_ERASE; |
| |
| if (!(update_rgn = send_ncpaint( hwnd, NULL, &flags ))) return FALSE; |
| |
| if (rect) |
| { |
| if (GetRgnBox( update_rgn, rect ) != NULLREGION) |
| { |
| HDC hdc = GetDCEx( hwnd, 0, DCX_USESTYLE ); |
| MapWindowPoints( 0, hwnd, (LPPOINT)rect, 2 ); |
| DPtoLP( hdc, (LPPOINT)rect, 2 ); |
| ReleaseDC( hwnd, hdc ); |
| } |
| } |
| send_erase( hwnd, flags, update_rgn, NULL, NULL ); |
| |
| /* check if we still have an update region */ |
| flags = UPDATE_PAINT | UPDATE_NOCHILDREN; |
| return (get_update_flags( hwnd, NULL, &flags ) && (flags & UPDATE_PAINT)); |
| } |
| |
| |
| /*********************************************************************** |
| * ExcludeUpdateRgn (USER32.@) |
| */ |
| INT WINAPI ExcludeUpdateRgn( HDC hdc, HWND hwnd ) |
| { |
| HRGN update_rgn = CreateRectRgn( 0, 0, 0, 0 ); |
| INT ret = GetUpdateRgn( hwnd, update_rgn, FALSE ); |
| |
| if (ret != ERROR) |
| { |
| POINT pt; |
| |
| GetDCOrgEx( hdc, &pt ); |
| MapWindowPoints( 0, hwnd, &pt, 1 ); |
| OffsetRgn( update_rgn, -pt.x, -pt.y ); |
| ret = ExtSelectClipRgn( hdc, update_rgn, RGN_DIFF ); |
| DeleteObject( update_rgn ); |
| } |
| return ret; |
| } |
| |
| |
| /************************************************************************* |
| * ScrollWindowEx (USER32.@) |
| * |
| * Note: contrary to what the doc says, pixels that are scrolled from the |
| * outside of clipRect to the inside are NOT painted. |
| * |
| */ |
| INT WINAPI ScrollWindowEx( HWND hwnd, INT dx, INT dy, |
| const RECT *rect, const RECT *clipRect, |
| HRGN hrgnUpdate, LPRECT rcUpdate, |
| UINT flags ) |
| { |
| INT retVal = NULLREGION; |
| BOOL bOwnRgn = TRUE; |
| BOOL bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE)); |
| int rdw_flags; |
| HRGN hrgnTemp; |
| HRGN hrgnWinupd = 0; |
| HDC hDC; |
| RECT rc, cliprc; |
| RECT caretrc; |
| HWND hwndCaret = NULL; |
| |
| 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)); |
| if( flags & ~( SW_SCROLLCHILDREN | SW_INVALIDATE | SW_ERASE)) |
| FIXME("some flags (%04x) are unhandled\n", flags); |
| |
| rdw_flags = (flags & SW_ERASE) && (flags & SW_INVALIDATE) ? |
| RDW_INVALIDATE | RDW_ERASE : RDW_INVALIDATE ; |
| |
| if (!WIN_IsWindowDrawable( hwnd, TRUE )) return ERROR; |
| hwnd = WIN_GetFullHandle( hwnd ); |
| |
| 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 ); |
| |
| if( !IsRectEmpty(&cliprc) && (dx || dy)) { |
| DWORD dcxflags = DCX_CACHE; |
| DWORD style = GetWindowLongW( hwnd, GWL_STYLE ); |
| caretrc = rc; |
| hwndCaret = fix_caret(hwnd, &caretrc, flags); |
| |
| if( style & WS_CLIPSIBLINGS) dcxflags |= DCX_CLIPSIBLINGS; |
| if( GetClassLongW( hwnd, GCL_STYLE ) & CS_PARENTDC) |
| dcxflags |= DCX_PARENTCLIP; |
| if( !(flags & SW_SCROLLCHILDREN) && (style & WS_CLIPCHILDREN)) |
| dcxflags |= DCX_CLIPCHILDREN; |
| hDC = GetDCEx( hwnd, 0, dcxflags); |
| if (hDC) |
| { |
| ScrollDC( hDC, dx, dy, &rc, &cliprc, hrgnUpdate, rcUpdate ); |
| |
| ReleaseDC( hwnd, hDC ); |
| |
| if (!bUpdate) |
| RedrawWindow( hwnd, NULL, hrgnUpdate, rdw_flags); |
| } |
| |
| /* If the windows has an update region, this must be |
| * scrolled as well. Keep a copy in hrgnWinupd |
| * to be added to hrngUpdate at the end. */ |
| hrgnTemp = CreateRectRgn( 0, 0, 0, 0 ); |
| retVal = GetUpdateRgn( hwnd, hrgnTemp, FALSE ); |
| if (retVal != NULLREGION) |
| { |
| HRGN hrgnClip = CreateRectRgnIndirect(&cliprc); |
| if( !bOwnRgn) { |
| hrgnWinupd = CreateRectRgn( 0, 0, 0, 0); |
| CombineRgn( hrgnWinupd, hrgnTemp, 0, RGN_COPY); |
| } |
| OffsetRgn( hrgnTemp, dx, dy ); |
| CombineRgn( hrgnTemp, hrgnTemp, hrgnClip, RGN_AND ); |
| if( !bOwnRgn) |
| CombineRgn( hrgnWinupd, hrgnWinupd, hrgnTemp, RGN_OR ); |
| RedrawWindow( hwnd, NULL, hrgnTemp, rdw_flags); |
| DeleteObject( hrgnClip ); |
| } |
| DeleteObject( hrgnTemp ); |
| } else { |
| /* nothing was scrolled */ |
| if( !bOwnRgn) |
| SetRectRgn( hrgnUpdate, 0, 0, 0, 0 ); |
| SetRectEmpty( rcUpdate); |
| } |
| |
| 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_flags | |
| ((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0 ) ); |
| |
| if( hrgnWinupd) { |
| CombineRgn( hrgnUpdate, hrgnUpdate, hrgnWinupd, RGN_OR); |
| DeleteObject( hrgnWinupd); |
| } |
| |
| if( hwndCaret ) { |
| SetCaretPos( caretrc.left + dx, caretrc.top + dy ); |
| ShowCaret(hwndCaret); |
| } |
| |
| if( bOwnRgn && hrgnUpdate ) DeleteObject( hrgnUpdate ); |
| |
| return retVal; |
| } |
| |
| |
| /************************************************************************* |
| * ScrollWindow (USER32.@) |
| * |
| */ |
| BOOL WINAPI ScrollWindow( HWND hwnd, INT dx, INT dy, |
| const RECT *rect, const RECT *clipRect ) |
| { |
| return (ERROR != ScrollWindowEx( hwnd, dx, dy, rect, clipRect, 0, NULL, |
| (rect ? 0 : SW_SCROLLCHILDREN) | |
| SW_INVALIDATE | SW_ERASE )); |
| } |
| |
| |
| /************************************************************************* |
| * ScrollDC (USER32.@) |
| * |
| * dx, dy, lprcScroll and lprcClip are all in logical coordinates (msdn is |
| * wrong) hrgnUpdate is returned in device coordinates with rcUpdate in |
| * logical coordinates. |
| */ |
| BOOL WINAPI ScrollDC( HDC hdc, INT dx, INT dy, const RECT *lprcScroll, |
| const RECT *lprcClip, HRGN hrgnUpdate, LPRECT lprcUpdate ) |
| |
| { |
| return USER_Driver->pScrollDC( hdc, dx, dy, lprcScroll, lprcClip, hrgnUpdate, lprcUpdate ); |
| } |
