/* * Undocumented SmoothScrollWindow function from COMCTL32.DLL * * Copyright 2000 Marcus Meissner <marcus@jet.franken.de> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA * * TODO * - actually add smooth scrolling */ #include <stdarg.h> #include "windef.h" #include "winbase.h" #include "winreg.h" #include "winerror.h" #include "winuser.h" #include "wine/debug.h" WINE_DEFAULT_DEBUG_CHANNEL(commctrl); static DWORD smoothscroll = 2; typedef BOOL (CALLBACK *SCROLLWINDOWEXPROC)(HWND,INT,INT,LPRECT,LPRECT,HRGN,LPRECT,DWORD); typedef struct tagSMOOTHSCROLLSTRUCT { DWORD dwSize; DWORD x2; HWND hwnd; DWORD dx; DWORD dy; LPRECT lpscrollrect; LPRECT lpcliprect; HRGN hrgnupdate; LPRECT lpupdaterect; DWORD flags; DWORD stepinterval; DWORD dx_step; DWORD dy_step; SCROLLWINDOWEXPROC scrollfun; /* same parameters as ScrollWindowEx */ } SMOOTHSCROLLSTRUCT; /************************************************************************** * SmoothScrollWindow [COMCTL32.382] * * Lots of magic for smooth scrolling windows. * * RETURNS * Success: TRUE * Failure: FALSE * * BUGS * Currently only scrolls ONCE. The comctl32 implementation uses GetTickCount * and what else to do smooth scrolling. */ BOOL WINAPI SmoothScrollWindow( SMOOTHSCROLLSTRUCT *smooth ) { LPRECT lpupdaterect = smooth->lpupdaterect; HRGN hrgnupdate = smooth->hrgnupdate; RECT tmprect; DWORD flags = smooth->flags; if (smooth->dwSize!=sizeof(SMOOTHSCROLLSTRUCT)) return FALSE; if (!lpupdaterect) lpupdaterect = &tmprect; SetRectEmpty(lpupdaterect); if (!(flags & 0x40000)) { /* no override, use system wide defaults */ if (smoothscroll == 2) { HKEY hkey; smoothscroll = 0; if (!RegOpenKeyA(HKEY_CURRENT_USER,"Control Panel\\Desktop",&hkey)) { DWORD len = 4; RegQueryValueExA(hkey,"SmoothScroll",0,0,(LPBYTE)&smoothscroll,&len); RegCloseKey(hkey); } } if (!smoothscroll) flags |= 0x20000; } if (flags & 0x20000) { /* are we doing jump scrolling? */ if ((smooth->x2 & 1) && smooth->scrollfun) return smooth->scrollfun( smooth->hwnd,smooth->dx,smooth->dy,smooth->lpscrollrect, smooth->lpcliprect,hrgnupdate,lpupdaterect, flags & 0xffff ); else return ScrollWindowEx( smooth->hwnd,smooth->dx,smooth->dy,smooth->lpscrollrect, smooth->lpcliprect,hrgnupdate,lpupdaterect, flags & 0xffff ); } FIXME("(hwnd=%p,flags=%lx,x2=%lx): should smooth scroll here.\n", smooth->hwnd,flags,smooth->x2 ); /* FIXME: do timer based smooth scrolling */ if ((smooth->x2 & 1) && smooth->scrollfun) return smooth->scrollfun( smooth->hwnd,smooth->dx,smooth->dy,smooth->lpscrollrect, smooth->lpcliprect,hrgnupdate,lpupdaterect, flags & 0xffff ); else return ScrollWindowEx( smooth->hwnd,smooth->dx,smooth->dy,smooth->lpscrollrect, smooth->lpcliprect,hrgnupdate,lpupdaterect, flags & 0xffff ); }