| 1 | /*
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| 2 | * Undocumented SmoothScrollWindow function from COMCTL32.DLL
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| 3 | *
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| 4 | * Copyright 2000 Marcus Meissner <marcus@jet.franken.de>
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the GNU Lesser General Public
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| 8 | * License as published by the Free Software Foundation; either
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| 9 | * version 2.1 of the License, or (at your option) any later version.
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| 10 | *
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| 11 | * This library is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | * Lesser General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU Lesser General Public
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| 17 | * License along with this library; if not, write to the Free Software
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| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 19 | *
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| 20 | * TODO
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| 21 | * - actually add smooth scrolling
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| 22 | */
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| 23 |
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| 24 | #include "winbase.h"
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| 25 | #include "winreg.h"
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| 26 | #include "winerror.h"
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| 27 | #include "commctrl.h"
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| 28 | #include "wine/debug.h"
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| 29 |
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| 30 | WINE_DEFAULT_DEBUG_CHANNEL(commctrl);
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| 31 |
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| 32 | static DWORD smoothscroll = 2;
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| 33 |
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| 34 | #ifdef __WIN32OS2__
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| 35 | typedef BOOL (* CALLBACK SCROLLWINDOWEXPROC)(HWND,INT,INT,LPRECT,LPRECT,HRGN,LPRECT,DWORD);
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| 36 | #else
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| 37 | typedef BOOL (CALLBACK *SCROLLWINDOWEXPROC)(HWND,INT,INT,LPRECT,LPRECT,HRGN,LPRECT,DWORD);
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| 38 | #endif
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| 39 |
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| 40 | typedef struct tagSMOOTHSCROLLSTRUCT {
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| 41 | DWORD dwSize;
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| 42 | DWORD x2;
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| 43 | HWND hwnd;
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| 44 | DWORD dx;
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| 45 |
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| 46 | DWORD dy;
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| 47 | LPRECT lpscrollrect;
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| 48 | LPRECT lpcliprect;
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| 49 | HRGN hrgnupdate;
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| 50 |
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| 51 | LPRECT lpupdaterect;
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| 52 | DWORD flags;
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| 53 | DWORD stepinterval;
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| 54 | DWORD dx_step;
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| 55 |
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| 56 | DWORD dy_step;
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| 57 | SCROLLWINDOWEXPROC scrollfun; /* same parameters as ScrollWindowEx */
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| 58 | } SMOOTHSCROLLSTRUCT;
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| 59 |
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| 60 | /**************************************************************************
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| 61 | * SmoothScrollWindow [COMCTL32.382]
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| 62 | *
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| 63 | * Lots of magic for smooth scrolling windows.
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| 64 | *
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| 65 | * Currently only scrolls ONCE. The comctl32 implementation uses GetTickCount
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| 66 | * and what else to do smooth scrolling.
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| 67 | */
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| 68 |
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| 69 | BOOL WINAPI SmoothScrollWindow( SMOOTHSCROLLSTRUCT *smooth ) {
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| 70 | LPRECT lpupdaterect = smooth->lpupdaterect;
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| 71 | HRGN hrgnupdate = smooth->hrgnupdate;
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| 72 | RECT tmprect;
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| 73 | BOOL ret = TRUE;
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| 74 | DWORD flags = smooth->flags;
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| 75 |
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| 76 | if (smooth->dwSize!=sizeof(SMOOTHSCROLLSTRUCT))
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| 77 | return FALSE;
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| 78 |
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| 79 | if (!lpupdaterect)
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| 80 | lpupdaterect = &tmprect;
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| 81 | SetRectEmpty(lpupdaterect);
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| 82 |
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| 83 | if (!(flags & 0x40000)) { /* no override, use system wide defaults */
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| 84 | if (smoothscroll == 2) {
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| 85 | HKEY hkey;
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| 86 |
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| 87 | smoothscroll = 0;
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| 88 | if (!RegOpenKeyA(HKEY_CURRENT_USER,"Control Panel\\Desktop",&hkey)) {
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| 89 | DWORD len = 4;
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| 90 |
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| 91 | RegQueryValueExA(hkey,"SmoothScroll",0,0,(LPBYTE)&smoothscroll,&len);
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| 92 | RegCloseKey(hkey);
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| 93 | }
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| 94 | }
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| 95 | if (!smoothscroll)
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| 96 | flags |= 0x20000;
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| 97 | }
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| 98 |
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| 99 | if (flags & 0x20000) { /* are we doing jump scrolling? */
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| 100 | if ((smooth->x2 & 1) && smooth->scrollfun)
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| 101 | return smooth->scrollfun(
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| 102 | smooth->hwnd,smooth->dx,smooth->dy,smooth->lpscrollrect,
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| 103 | smooth->lpcliprect,hrgnupdate,lpupdaterect,
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| 104 | flags & 0xffff
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| 105 | );
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| 106 | else
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| 107 | return ScrollWindowEx(
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| 108 | smooth->hwnd,smooth->dx,smooth->dy,smooth->lpscrollrect,
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| 109 | smooth->lpcliprect,hrgnupdate,lpupdaterect,
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| 110 | flags & 0xffff
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| 111 | );
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| 112 | }
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| 113 |
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| 114 | FIXME("(hwnd=%p,flags=%lx,x2=%lx): should smooth scroll here.\n",
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| 115 | smooth->hwnd,flags,smooth->x2
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| 116 | );
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| 117 | /* FIXME: do timer based smooth scrolling */
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| 118 | if ((smooth->x2 & 1) && smooth->scrollfun)
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| 119 | return smooth->scrollfun(
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| 120 | smooth->hwnd,smooth->dx,smooth->dy,smooth->lpscrollrect,
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| 121 | smooth->lpcliprect,hrgnupdate,lpupdaterect,
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| 122 | flags & 0xffff
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| 123 | );
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| 124 | else
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| 125 | return ScrollWindowEx(
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| 126 | smooth->hwnd,smooth->dx,smooth->dy,smooth->lpscrollrect,
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| 127 | smooth->lpcliprect,hrgnupdate,lpupdaterect,
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| 128 | flags & 0xffff
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| 129 | );
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| 130 | return ret;
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| 131 | }
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