Method refreshTouches

snap_drawing/src/snap_drawing/cpp/Layers/LayerRoot.cpp:202–236

    return processed;
}

GestureTypes LayerRoot::getGesturesTypesForTouchEvent(const TouchEvent& event) const {
    if (_contentLayer == nullptr) {
        return GestureTypes();
    }

    auto gestureCandidates = _touchDispatcher.getGestureCandidatesForEvent(event, _contentLayer);

    GestureTypes types;

    for (const auto& gesture : gestureCandidates) {
        if (Valdi::castOrNull<TapGestureRecognizer>(gesture) != nullptr) {
            types.hasTap = true;
        } else if (Valdi::castOrNull<ScrollGestureRecognizer>(gesture) != nullptr) {
            types.hasScroll = true;
        } else if (Valdi::castOrNull<DragGestureRecognizer>(gesture) != nullptr) {
            types.hasDrag = true;
        }
    }

    return types;
}

bool LayerRoot::refreshTouches(const TimePoint& currentTime) {
    if (_touchDispatcher.isEmpty()) {
        return false;
    }
    if (!_touchDispatcher.getLastEvent()) {
        return false;
    }

    const auto& lastEvent = _touchDispatcher.getLastEvent().value();

    auto offsetSinceLastEvent = currentTime - lastEvent.getTime();

    if (offsetSinceLastEvent.milliseconds() < kTouchRefreshMs) {
        // Only refresh gestures if there wasn't another event that came over 10ms ago
        return false;