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SDL: Enable precise (smooth touchpad) scrolling.

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Made possible by #17329
This commit is contained in:
Henrik Rydgård 2023-02-12 00:29:37 +01:00
parent 3d8d7a3ccb
commit 0f107e102e
1 changed files with 13 additions and 0 deletions
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13
SDL/SDLMain.cpp
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@ -1170,6 +1170,19 @@ int main(int argc, char *argv[]) {
KeyInput key;
key.deviceId = DEVICE_ID_MOUSE;
key.flags = KEY_DOWN;
if (event.wheel.preciseY != 0.0f) {
// Should the scale be DPI-driven?
const float scale = 30.0f;
key.keyCode = event.wheel.preciseY > 0 ? NKCODE_EXT_MOUSEWHEEL_UP : NKCODE_EXT_MOUSEWHEEL_DOWN;
key.flags |= KEY_HASWHEELDELTA;
int wheelDelta = event.wheel.preciseY * scale;
if (event.wheel.preciseY < 0) {
wheelDelta = -wheelDelta;
}
key.flags |= wheelDelta << 16;
NativeKey(key);
break;
}
if (event.wheel.y > 0) {
key.keyCode = NKCODE_EXT_MOUSEWHEEL_UP;
mouseWheelMovedUpFrames = 5;