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Horizontal wheel support in windows 

Lorenzo Pistone

this patch adds support for the horizontal wheel in Windows. It is shamelessly copied off the vertical wheel code, but I guess that that is a value added in consistency.
This commit is contained in:
Sam Lantinga 2013-11-06 23:35:08 -08:00
parent 22770a8f40
commit 3b050fc953
1 changed files with 22 additions and 0 deletions
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22
src/video/windows/SDL_windowsevents.c
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@ -67,6 +67,9 @@
#ifndef WM_TOUCH
#define WM_TOUCH 0x0240
#endif
#ifndef WM_MOUSEHWHEEL
#define WM_MOUSEHWHEEL 0x020E
#endif
static SDL_Scancode
WindowsScanCodeToSDLScanCode( LPARAM lParam, WPARAM wParam )
@ -481,6 +484,25 @@ WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
break;
}
case WM_MOUSEHWHEEL:
{
static short s_AccumulatedMotion;
s_AccumulatedMotion += GET_WHEEL_DELTA_WPARAM(wParam);
if (s_AccumulatedMotion > 0) {
while (s_AccumulatedMotion >= WHEEL_DELTA) {
SDL_SendMouseWheel(data->window, 0, 1, 0, timestamp);
s_AccumulatedMotion -= WHEEL_DELTA;
}
} else {
while (s_AccumulatedMotion <= -WHEEL_DELTA) {
SDL_SendMouseWheel(data->window, 0, -1, 0, timestamp);
s_AccumulatedMotion += WHEEL_DELTA;
}
}
break;
}
#ifdef WM_MOUSELEAVE
case WM_MOUSELEAVE:
if (SDL_GetMouseFocus() == data->window && !SDL_GetMouse()->relative_mode) {