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Implemented mouse wheel support.

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Mike Hearn 2003-09-17 22:38:12 +00:00 committed by Alexandre Julliard
parent add0c5850b
commit 9e849c0044
1 changed files with 31 additions and 0 deletions
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31
programs/winhelp/winhelp.c
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@ -24,6 +24,7 @@
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include "windef.h"
#include "winbase.h"
@ -811,6 +812,36 @@ static LRESULT CALLBACK WINHELP_TextWndProc(HWND hWnd, UINT msg, WPARAM wParam,
if (!(winpos->flags & SWP_NOSIZE)) WINHELP_SetupText(hWnd);
break;
case WM_MOUSEWHEEL:
{
int wheelDelta = 0;
UINT scrollLines = 3;
int curPos = GetScrollPos(hWnd, SB_VERT);
int min, max;
GetScrollRange(hWnd, SB_VERT, &min, &max);
SystemParametersInfo(SPI_GETWHEELSCROLLLINES,0, &scrollLines, 0);
if (wParam & (MK_SHIFT | MK_CONTROL))
return DefWindowProc(hWnd, msg, wParam, lParam);
wheelDelta -= GET_WHEEL_DELTA_WPARAM(wParam);
if (abs(wheelDelta) >= WHEEL_DELTA && scrollLines) {
int dy;
curPos += wheelDelta;
if (curPos > max)
curPos = max;
else if (curPos < min)
curPos = min;
dy = GetScrollPos(hWnd, SB_VERT) - curPos;
SetScrollPos(hWnd, SB_VERT, curPos, TRUE);
ScrollWindow(hWnd, 0, dy, NULL, NULL);
UpdateWindow(hWnd);
}
}
break;
case WM_VSCROLL:
{
BOOL update = TRUE;