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[libinput] Event compression for PointerAxis

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This commit is contained in:
Martin Gräßlin 2015-09-02 11:49:51 +02:00
parent 123e361f55
commit 5904349c69
1 changed files with 25 additions and 3 deletions
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28
libinput/connection.cpp
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@ -206,9 +206,31 @@ void Connection::processEvents()
}
case LIBINPUT_EVENT_POINTER_AXIS: {
PointerEvent *pe = static_cast<PointerEvent*>(event.data());
const auto axis = pe->axis();
for (auto it = axis.begin(); it != axis.end(); ++it) {
emit pointerAxisChanged(*it, pe->axisValue(*it), pe->time());
struct Axis {
qreal delta = 0.0;
quint32 time = 0;
};
QMap<InputRedirection::PointerAxis, Axis> deltas;
auto update = [&deltas] (PointerEvent *pe) {
const auto axis = pe->axis();
for (auto it = axis.begin(); it != axis.end(); ++it) {
deltas[*it].delta += pe->axisValue(*it);
deltas[*it].time = pe->time();
}
};
update(pe);
auto it = m_eventQueue.begin();
while (it != m_eventQueue.end()) {
if ((*it)->type() == LIBINPUT_EVENT_POINTER_AXIS) {
QScopedPointer<PointerEvent> p(static_cast<PointerEvent*>(*it));
update(p.data());
it = m_eventQueue.erase(it);
} else {
break;
}
}
for (auto it = deltas.constBegin(); it != deltas.constEnd(); ++it) {
emit pointerAxisChanged(it.key(), it.value().delta, it.value().time);
}
break;
}