diff options
Diffstat (limited to 'win32/PlatWin.h')
-rw-r--r-- | win32/PlatWin.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/win32/PlatWin.h b/win32/PlatWin.h index 893618b38..68098f9c7 100644 --- a/win32/PlatWin.h +++ b/win32/PlatWin.h @@ -49,6 +49,20 @@ int SystemMetricsForDpi(int nIndex, UINT dpi) noexcept; HCURSOR LoadReverseArrowCursor(UINT dpi) noexcept; +class MouseWheelDelta { + int wheelDelta = 0; +public: + bool Accumulate(WPARAM wParam) noexcept { + wheelDelta -= GET_WHEEL_DELTA_WPARAM(wParam); + return std::abs(wheelDelta) >= WHEEL_DELTA; + } + int Actions() noexcept { + const int actions = wheelDelta / WHEEL_DELTA; + wheelDelta = wheelDelta % WHEEL_DELTA; + return actions; + } +}; + #if defined(USE_D2D) extern bool LoadD2D(); extern ID2D1Factory *pD2DFactory; |