windows/scroll.c

   1 /*
   2  * Scroll windows and DCs
   3  *
   4  * Copyright  David W. Metcalfe, 1993
   5  *            Alex Korobka       1995,1996
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <stdlib.h>
  23
  24 #include "windef.h"
  25 #include "wingdi.h"
  26 #include "wine/winuser16.h"
  27 #include "winuser.h"
  28 #include "user.h"
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(scroll);
  32
  33 /*************************************************************************
  34  *              ScrollWindow (USER32.@)
  35  *
  36  */
  37 BOOL WINAPI ScrollWindow( HWND hwnd, INT dx, INT dy,
  38                               const RECT *rect, const RECT *clipRect )
  39 {
  40     return
  41         (ERROR != ScrollWindowEx( hwnd, dx, dy, rect, clipRect, 0, NULL,
  42                                     (rect ? 0 : SW_SCROLLCHILDREN) |
  43                                     SW_INVALIDATE ));
  44 }
  45
  46 /*************************************************************************
  47  *              ScrollDC (USER.221)
  48  */
  49 BOOL16 WINAPI ScrollDC16( HDC16 hdc, INT16 dx, INT16 dy, const RECT16 *rect,
  50                           const RECT16 *cliprc, HRGN16 hrgnUpdate,
  51                           LPRECT16 rcUpdate )
  52 {
  53     RECT rect32, clipRect32, rcUpdate32;
  54     BOOL16 ret;
  55
  56     if (rect) CONV_RECT16TO32( rect, &rect32 );
  57     if (cliprc) CONV_RECT16TO32( cliprc, &clipRect32 );
  58     ret = ScrollDC( hdc, dx, dy, rect ? &rect32 : NULL,
  59                       cliprc ? &clipRect32 : NULL, hrgnUpdate, &rcUpdate32 );
  60     if (rcUpdate) CONV_RECT32TO16( &rcUpdate32, rcUpdate );
  61     return ret;
  62 }
  63
  64
  65 /*************************************************************************
  66  *              ScrollDC (USER32.@)
  67  *
  68  *   Only the hrgnUpdate is return in device coordinate.
  69  *   rcUpdate must be returned in logical coordinate to comply with win API.
  70  *
  71  */
  72 BOOL WINAPI ScrollDC( HDC hdc, INT dx, INT dy, const RECT *rc,
  73                           const RECT *prLClip, HRGN hrgnUpdate,
  74                           LPRECT rcUpdate )
  75 {
  76     if (USER_Driver.pScrollDC)
  77         return USER_Driver.pScrollDC( hdc, dx, dy, rc, prLClip, hrgnUpdate, rcUpdate );
  78     return FALSE;
  79 }
  80
  81
  82 /*************************************************************************
  83  *              ScrollWindowEx (USER32.@)
  84  *
  85  * NOTE: Use this function instead of ScrollWindow32
  86  */
  87 INT WINAPI ScrollWindowEx( HWND hwnd, INT dx, INT dy,
  88                                const RECT *rect, const RECT *clipRect,
  89                                HRGN hrgnUpdate, LPRECT rcUpdate,
  90                                UINT flags )
  91 {
  92     if (USER_Driver.pScrollWindowEx)
  93         return USER_Driver.pScrollWindowEx( hwnd, dx, dy, rect, clipRect,
  94                                             hrgnUpdate, rcUpdate, flags );
  95     return ERROR;
  96 }