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Fixed HandleMouseWheel to be __WIN32__ sensitive

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10011 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robin Dunn
2001-05-06 00:25:03 +00:00
parent a2cf862156
commit 0f7a546d9c
1 changed files with 20 additions and 5 deletions
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25
src/msw/window.cpp
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@@ -3371,16 +3371,31 @@ bool wxWindow::HandleMouseWheel(WXWPARAM wParam, WXLPARAM lParam)
GET_X_LPARAM(lParam), GET_X_LPARAM(lParam),
GET_Y_LPARAM(lParam), GET_Y_LPARAM(lParam),
LOWORD(wParam)); LOWORD(wParam));
event.m_wheelRotation = (short)HIWORD(wParam); event.m_wheelRotation = (short)HIWORD(wParam);
event.m_wheelDelta = WHEEL_DELTA; event.m_wheelDelta = WHEEL_DELTA;
int linesPer; #ifdef __WIN32__
if (!SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &linesPer, 0)) static int s_linesPerRotation = -1;
linesPer = 1; if ( s_linesPerRotation == -1 )
event.m_linesPerAction = linesPer; {
if ( !::SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0,
&s_linesPerRotation, 0))
{
// this is not supposed to happen
wxLogLastError(_T("SystemParametersInfo(GETWHEELSCROLLLINES)"));
// the default is 3, so use it if SystemParametersInfo() failed
s_linesPerRotation = 3;
}
}
#else // Win16
// no SystemParametersInfo() under Win16
static const int s_linesPerRotation = 3;
#endif
event.m_linesPerAction = s_linesPerRotation;
return GetEventHandler()->ProcessEvent(event); return GetEventHandler()->ProcessEvent(event);
#else #else
return FALSE; return FALSE;
#endif #endif