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
)
39 HWND hCaret
= CARET_GetHwnd();
46 (flags
& SW_SCROLLCHILDREN
&& IsChild(hWnd
, hCaret
)) )
51 MapWindowPoints( hCaret
, hWnd
, (LPPOINT
)&rc
, 2 );
52 if( IntersectRect(lprc
, lprc
, &rc
) )
65 /*************************************************************************
66 * ScrollWindow (USER32.@)
69 BOOL WINAPI
ScrollWindow( HWND hwnd
, INT dx
, INT dy
,
70 const RECT
*rect
, const RECT
*clipRect
)
73 (ERROR
!= ScrollWindowEx( hwnd
, dx
, dy
, rect
, clipRect
, 0, NULL
,
74 (rect
? 0 : SW_SCROLLCHILDREN
) |
78 /*************************************************************************
81 BOOL16 WINAPI
ScrollDC16( HDC16 hdc
, INT16 dx
, INT16 dy
, const RECT16
*rect
,
82 const RECT16
*cliprc
, HRGN16 hrgnUpdate
,
85 RECT rect32
, clipRect32
, rcUpdate32
;
88 if (rect
) CONV_RECT16TO32( rect
, &rect32
);
89 if (cliprc
) CONV_RECT16TO32( cliprc
, &clipRect32
);
90 ret
= ScrollDC( hdc
, dx
, dy
, rect
? &rect32
: NULL
,
91 cliprc
? &clipRect32
: NULL
, hrgnUpdate
, &rcUpdate32
);
92 if (rcUpdate
) CONV_RECT32TO16( &rcUpdate32
, rcUpdate
);
97 /*************************************************************************
100 * Only the hrgnUpdate is return in device coordinate.
101 * rcUpdate must be returned in logical coordinate to comply with win API.
104 BOOL WINAPI
ScrollDC( HDC hdc
, INT dx
, INT dy
, const RECT
*rc
,
105 const RECT
*prLClip
, HRGN hrgnUpdate
,
108 if (USER_Driver
.pScrollDC
)
109 return USER_Driver
.pScrollDC( hdc
, dx
, dy
, rc
, prLClip
, hrgnUpdate
, rcUpdate
);
114 /*************************************************************************
115 * ScrollWindowEx (USER32.@)
117 * NOTE: Use this function instead of ScrollWindow32
119 INT WINAPI
ScrollWindowEx( HWND hwnd
, INT dx
, INT dy
,
120 const RECT
*rect
, const RECT
*clipRect
,
121 HRGN hrgnUpdate
, LPRECT rcUpdate
,
127 if (!WIN_IsWindowDrawable( hwnd
, TRUE
)) return ERROR
;
128 hwnd
= WIN_GetFullHandle( hwnd
);
130 GetClientRect(hwnd
, &rc
);
131 if (rect
) IntersectRect(&rc
, &rc
, rect
);
133 if (clipRect
) IntersectRect(&cliprc
,&rc
,clipRect
);
136 if (!IsRectEmpty(&cliprc
) && (dx
|| dy
))
139 HWND hwndCaret
= fix_caret(hwnd
, &caretrc
, flags
);
141 if (USER_Driver
.pScrollWindowEx
)
142 result
= USER_Driver
.pScrollWindowEx( hwnd
, dx
, dy
, &rc
, &cliprc
,
143 hrgnUpdate
, rcUpdate
, flags
);
145 result
= ERROR
; /* FIXME: we should have a fallback implementation */
149 SetCaretPos( caretrc
.left
+ dx
, caretrc
.top
+ dy
);
150 ShowCaret(hwndCaret
);