| /* |
| * Scroll windows and DCs |
| * |
| * Copyright David W. Metcalfe, 1993 |
| * Alex Korobka 1995,1996 |
| * |
| * 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 <stdlib.h> |
| |
| #include "windef.h" |
| #include "wingdi.h" |
| #include "wine/winuser16.h" |
| #include "winuser.h" |
| #include "user.h" |
| #include "win.h" |
| #include "wine/debug.h" |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(scroll); |
| |
| /************************************************************************* |
| * fix_caret |
| */ |
| static HWND fix_caret(HWND hWnd, LPRECT lprc, UINT flags) |
| { |
| HWND hCaret = CARET_GetHwnd(); |
| |
| if( hCaret ) |
| { |
| RECT rc; |
| CARET_GetRect( &rc ); |
| if( hCaret == hWnd || |
| (flags & SW_SCROLLCHILDREN && IsChild(hWnd, hCaret)) ) |
| { |
| POINT pt; |
| pt.x = rc.left; |
| pt.y = rc.top; |
| MapWindowPoints( hCaret, hWnd, (LPPOINT)&rc, 2 ); |
| if( IntersectRect(lprc, lprc, &rc) ) |
| { |
| HideCaret(hCaret); |
| lprc->left = pt.x; |
| lprc->top = pt.y; |
| return hCaret; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| |
| /************************************************************************* |
| * 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 )); |
| } |
| |
| /************************************************************************* |
| * ScrollDC (USER.221) |
| */ |
| BOOL16 WINAPI ScrollDC16( HDC16 hdc, INT16 dx, INT16 dy, const RECT16 *rect, |
| const RECT16 *cliprc, HRGN16 hrgnUpdate, |
| LPRECT16 rcUpdate ) |
| { |
| RECT rect32, clipRect32, rcUpdate32; |
| BOOL16 ret; |
| |
| if (rect) CONV_RECT16TO32( rect, &rect32 ); |
| if (cliprc) CONV_RECT16TO32( cliprc, &clipRect32 ); |
| ret = ScrollDC( hdc, dx, dy, rect ? &rect32 : NULL, |
| cliprc ? &clipRect32 : NULL, hrgnUpdate, &rcUpdate32 ); |
| if (rcUpdate) CONV_RECT32TO16( &rcUpdate32, rcUpdate ); |
| return ret; |
| } |
| |
| |
| /************************************************************************* |
| * ScrollDC (USER32.@) |
| * |
| * Only the hrgnUpdate is return in device coordinate. |
| * rcUpdate must be returned in logical coordinate to comply with win API. |
| * |
| */ |
| BOOL WINAPI ScrollDC( HDC hdc, INT dx, INT dy, const RECT *rc, |
| const RECT *prLClip, HRGN hrgnUpdate, |
| LPRECT rcUpdate ) |
| { |
| if (USER_Driver.pScrollDC) |
| return USER_Driver.pScrollDC( hdc, dx, dy, rc, prLClip, hrgnUpdate, rcUpdate ); |
| return FALSE; |
| } |
| |
| |
| /************************************************************************* |
| * ScrollWindowEx (USER32.@) |
| * |
| * NOTE: Use this function instead of ScrollWindow32 |
| */ |
| INT WINAPI ScrollWindowEx( HWND hwnd, INT dx, INT dy, |
| const RECT *rect, const RECT *clipRect, |
| HRGN hrgnUpdate, LPRECT rcUpdate, |
| UINT flags ) |
| { |
| RECT rc, cliprc; |
| INT result; |
| |
| 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 (!IsRectEmpty(&cliprc) && (dx || dy)) |
| { |
| RECT caretrc = rc; |
| HWND hwndCaret = fix_caret(hwnd, &caretrc, flags); |
| |
| if (USER_Driver.pScrollWindowEx) |
| result = USER_Driver.pScrollWindowEx( hwnd, dx, dy, &rc, &cliprc, |
| hrgnUpdate, rcUpdate, flags ); |
| else |
| result = ERROR; /* FIXME: we should have a fallback implementation */ |
| |
| if( hwndCaret ) |
| { |
| SetCaretPos( caretrc.left + dx, caretrc.top + dy ); |
| ShowCaret(hwndCaret); |
| } |
| } |
| else |
| result = NULLREGION; |
| |
| return result; |
| } |