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113 lines
2.9 KiB
C
113 lines
2.9 KiB
C
/*
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* Undocumented SmoothScrollWindow function from COMCTL32.DLL
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*
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* Copyright 2000 Marcus Meissner <marcus@jet.franken.de>
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*
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* TODO
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* - actually add smooth scrolling
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*/
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#include "winbase.h"
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#include "winreg.h"
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#include "winerror.h"
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#include "commctrl.h"
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#include "debugtools.h"
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DEFAULT_DEBUG_CHANNEL(commctrl);
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static DWORD smoothscroll = 2;
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typedef BOOL (CALLBACK *SCROLLWINDOWEXPROC)(HWND,INT,INT,LPRECT,LPRECT,HRGN,LPRECT,DWORD);
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typedef struct tagSMOOTHSCROLLSTRUCT {
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DWORD dwSize;
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DWORD x2;
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HWND hwnd;
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DWORD dx;
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DWORD dy;
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LPRECT lpscrollrect;
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LPRECT lpcliprect;
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HRGN hrgnupdate;
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LPRECT lpupdaterect;
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DWORD flags;
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DWORD stepinterval;
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DWORD dx_step;
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DWORD dy_step;
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SCROLLWINDOWEXPROC scrollfun; /* same parameters as ScrollWindowEx */
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} SMOOTHSCROLLSTRUCT;
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/**************************************************************************
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* SmoothScrollWindow [COMCTL32.382]
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*
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* Lots of magic for smooth scrolling windows.
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*
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* Currently only scrolls ONCE. The comctl32 implementation uses GetTickCount
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* and what else to do smooth scrolling.
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*/
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BOOL WINAPI SmoothScrollWindow( SMOOTHSCROLLSTRUCT *smooth ) {
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LPRECT lpupdaterect = smooth->lpupdaterect;
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HRGN hrgnupdate = smooth->hrgnupdate;
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RECT tmprect;
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BOOL ret = TRUE;
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DWORD flags = smooth->flags;
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if (smooth->dwSize!=sizeof(SMOOTHSCROLLSTRUCT))
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return FALSE;
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if (!lpupdaterect)
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lpupdaterect = &tmprect;
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SetRectEmpty(lpupdaterect);
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if (!(flags & 0x40000)) { /* no override, use system wide defaults */
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if (smoothscroll == 2) {
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HKEY hkey;
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smoothscroll = 0;
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if (!RegOpenKeyA(HKEY_CURRENT_USER,"Control Panel\\Desktop",&hkey)) {
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DWORD len = 4;
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RegQueryValueExA(hkey,"SmoothScroll",0,0,(LPBYTE)&smoothscroll,&len);
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RegCloseKey(hkey);
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}
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}
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if (!smoothscroll)
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flags |= 0x20000;
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}
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if (flags & 0x20000) { /* are we doing jump scrolling? */
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if ((smooth->x2 & 1) && smooth->scrollfun)
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return smooth->scrollfun(
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smooth->hwnd,smooth->dx,smooth->dy,smooth->lpscrollrect,
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smooth->lpcliprect,hrgnupdate,lpupdaterect,
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flags & 0xffff
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);
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else
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return ScrollWindowEx(
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smooth->hwnd,smooth->dx,smooth->dy,smooth->lpscrollrect,
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smooth->lpcliprect,hrgnupdate,lpupdaterect,
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flags & 0xffff
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);
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}
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FIXME("(hwnd=%x,flags=%lx,x2=%lx): should smooth scroll here.\n",
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smooth->hwnd,flags,smooth->x2
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);
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/* FIXME: do timer based smooth scrolling */
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if ((smooth->x2 & 1) && smooth->scrollfun)
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return smooth->scrollfun(
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smooth->hwnd,smooth->dx,smooth->dy,smooth->lpscrollrect,
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smooth->lpcliprect,hrgnupdate,lpupdaterect,
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flags & 0xffff
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);
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else
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return ScrollWindowEx(
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smooth->hwnd,smooth->dx,smooth->dy,smooth->lpscrollrect,
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smooth->lpcliprect,hrgnupdate,lpupdaterect,
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flags & 0xffff
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);
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return ret;
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}
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