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[win] Discern trackpad/mouse wheel based on delta values #192

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[win] Discern trackpad/mouse wheel based on delta values #192

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8 changes: 5 additions & 3 deletions os/win/window.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1411,9 +1411,11 @@ LRESULT WindowWin::wndProc(UINT msg, WPARAM wparam, LPARAM lparam)
if (ABS(z) >= WHEEL_DELTA)
z /= WHEEL_DELTA;
else {
// TODO use floating point numbers or something similar
// (so we could use: z /= double(WHEEL_DELTA))
z = SGN(z);
ev.setPreciseWheel(true);
const int sign = SGN(z);
z /= (WHEEL_DELTA / 10);
if (z == 0)
z = sign;
}

gfx::Point delta((msg == WM_MOUSEHWHEEL ? z : 0), (msg == WM_MOUSEWHEEL ? -z : 0));
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