2 * Scroll windows and DCs
4 * Copyright David W. Metcalfe, 1993
5 * Alex Korobka 1995,1996
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.
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.
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
28 #include "wine/winuser16.h"
32 #include "wine/debug.h"
34 WINE_DEFAULT_DEBUG_CHANNEL(scroll
);
36 /*************************************************************************
39 static HWND
fix_caret(HWND hWnd
, LPRECT lprc
, UINT flags
)
43 if (!GetGUIThreadInfo( GetCurrentThreadId(), &info
)) return 0;
44 if (!info
.hwndCaret
) return 0;
45 if (info
.hwndCaret
== hWnd
||
46 ((flags
& SW_SCROLLCHILDREN
) && IsChild(hWnd
, info
.hwndCaret
)))
49 pt
.x
= info
.rcCaret
.left
;
50 pt
.y
= info
.rcCaret
.top
;
51 MapWindowPoints( info
.hwndCaret
, hWnd
, (LPPOINT
)&info
.rcCaret
, 2 );
52 if( IntersectRect(lprc
, lprc
, &info
.rcCaret
) )
57 return info
.hwndCaret
;
64 /*************************************************************************
65 * ScrollWindow (USER32.@)
68 BOOL WINAPI
ScrollWindow( HWND hwnd
, INT dx
, INT dy
,
69 const RECT
*rect
, const RECT
*clipRect
)
72 (ERROR
!= ScrollWindowEx( hwnd
, dx
, dy
, rect
, clipRect
, 0, NULL
,
73 (rect
? 0 : SW_SCROLLCHILDREN
) |
77 /*************************************************************************
80 * Only the hrgnUpdate is return in device coordinate.
81 * rcUpdate must be returned in logical coordinate to comply with win API.
84 BOOL WINAPI
ScrollDC( HDC hdc
, INT dx
, INT dy
, const RECT
*rc
,
85 const RECT
*prLClip
, HRGN hrgnUpdate
,
88 if (USER_Driver
.pScrollDC
)
89 return USER_Driver
.pScrollDC( hdc
, dx
, dy
, rc
, prLClip
, hrgnUpdate
, rcUpdate
);
94 /*************************************************************************
95 * ScrollWindowEx (USER32.@)
97 * NOTE: Use this function instead of ScrollWindow32
99 INT WINAPI
ScrollWindowEx( HWND hwnd
, INT dx
, INT dy
,
100 const RECT
*rect
, const RECT
*clipRect
,
101 HRGN hrgnUpdate
, LPRECT rcUpdate
,
107 if (!WIN_IsWindowDrawable( hwnd
, TRUE
)) return ERROR
;
108 hwnd
= WIN_GetFullHandle( hwnd
);
110 GetClientRect(hwnd
, &rc
);
111 if (rect
) IntersectRect(&rc
, &rc
, rect
);
113 if (clipRect
) IntersectRect(&cliprc
,&rc
,clipRect
);
116 if (!IsRectEmpty(&cliprc
) && (dx
|| dy
))
119 HWND hwndCaret
= fix_caret(hwnd
, &caretrc
, flags
);
121 if (USER_Driver
.pScrollWindowEx
)
122 result
= USER_Driver
.pScrollWindowEx( hwnd
, dx
, dy
, rect
, clipRect
,
123 hrgnUpdate
, rcUpdate
, flags
);
125 result
= ERROR
; /* FIXME: we should have a fallback implementation */
129 SetCaretPos( caretrc
.left
+ dx
, caretrc
.top
+ dy
);
130 ShowCaret(hwndCaret
);