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
26 #include "wine/winuser16.h"
30 #include "wine/debug.h"
32 WINE_DEFAULT_DEBUG_CHANNEL(scroll
);
34 /*************************************************************************
37 static HWND
fix_caret(HWND hWnd
, LPRECT lprc
, UINT flags
)
41 if (!GetGUIThreadInfo( GetCurrentThreadId(), &info
)) return 0;
42 if (!info
.hwndCaret
) return 0;
43 if (info
.hwndCaret
== hWnd
||
44 ((flags
& SW_SCROLLCHILDREN
) && IsChild(hWnd
, info
.hwndCaret
)))
47 pt
.x
= info
.rcCaret
.left
;
48 pt
.y
= info
.rcCaret
.top
;
49 MapWindowPoints( info
.hwndCaret
, hWnd
, (LPPOINT
)&info
.rcCaret
, 2 );
50 if( IntersectRect(lprc
, lprc
, &info
.rcCaret
) )
55 return info
.hwndCaret
;
62 /*************************************************************************
63 * ScrollWindow (USER32.@)
66 BOOL WINAPI
ScrollWindow( HWND hwnd
, INT dx
, INT dy
,
67 const RECT
*rect
, const RECT
*clipRect
)
70 (ERROR
!= ScrollWindowEx( hwnd
, dx
, dy
, rect
, clipRect
, 0, NULL
,
71 (rect
? 0 : SW_SCROLLCHILDREN
) |
75 /*************************************************************************
78 BOOL16 WINAPI
ScrollDC16( HDC16 hdc
, INT16 dx
, INT16 dy
, const RECT16
*rect
,
79 const RECT16
*cliprc
, HRGN16 hrgnUpdate
,
82 RECT rect32
, clipRect32
, rcUpdate32
;
85 if (rect
) CONV_RECT16TO32( rect
, &rect32
);
86 if (cliprc
) CONV_RECT16TO32( cliprc
, &clipRect32
);
87 ret
= ScrollDC( hdc
, dx
, dy
, rect
? &rect32
: NULL
,
88 cliprc
? &clipRect32
: NULL
, hrgnUpdate
, &rcUpdate32
);
89 if (rcUpdate
) CONV_RECT32TO16( &rcUpdate32
, rcUpdate
);
94 /*************************************************************************
97 * Only the hrgnUpdate is return in device coordinate.
98 * rcUpdate must be returned in logical coordinate to comply with win API.
101 BOOL WINAPI
ScrollDC( HDC hdc
, INT dx
, INT dy
, const RECT
*rc
,
102 const RECT
*prLClip
, HRGN hrgnUpdate
,
105 if (USER_Driver
.pScrollDC
)
106 return USER_Driver
.pScrollDC( hdc
, dx
, dy
, rc
, prLClip
, hrgnUpdate
, rcUpdate
);
111 /*************************************************************************
112 * ScrollWindowEx (USER32.@)
114 * NOTE: Use this function instead of ScrollWindow32
116 INT WINAPI
ScrollWindowEx( HWND hwnd
, INT dx
, INT dy
,
117 const RECT
*rect
, const RECT
*clipRect
,
118 HRGN hrgnUpdate
, LPRECT rcUpdate
,
124 if (!WIN_IsWindowDrawable( hwnd
, TRUE
)) return ERROR
;
125 hwnd
= WIN_GetFullHandle( hwnd
);
127 GetClientRect(hwnd
, &rc
);
128 if (rect
) IntersectRect(&rc
, &rc
, rect
);
130 if (clipRect
) IntersectRect(&cliprc
,&rc
,clipRect
);
133 if (!IsRectEmpty(&cliprc
) && (dx
|| dy
))
136 HWND hwndCaret
= fix_caret(hwnd
, &caretrc
, flags
);
138 if (USER_Driver
.pScrollWindowEx
)
139 result
= USER_Driver
.pScrollWindowEx( hwnd
, dx
, dy
, &rc
, &cliprc
,
140 hrgnUpdate
, rcUpdate
, flags
);
142 result
= ERROR
; /* FIXME: we should have a fallback implementation */
146 SetCaretPos( caretrc
.left
+ dx
, caretrc
.top
+ dy
);
147 ShowCaret(hwndCaret
);