private bool ConsumeDrags(GestureSamples gestureSamples)
{
bool dragsConsumed = false;
List<GestureSample> freeDrags = gestureSamples.GetSamples (GestureType.FreeDrag);
foreach (GestureSample freeDrag in freeDrags) {
if (IsGestureWithinView (freeDrag)) {
Position += freeDrag.Delta;
dragsConsumed = true;
}
}
return dragsConsumed;
}
private bool ConsumePinches(GestureSamples gestureSamples)
{
Vector2 initialPosition = Position;
bool pinchesConsumed = false;
List<GestureSample> pinches = gestureSamples.GetSamples (GestureType.Pinch);
foreach (GestureSample pinch in pinches) {
if (IsGestureWithinView (pinch)) {
float scaleFactor = GetPinchScaleFactor (pinch);
Scale *= scaleFactor;
Position = GetPinchScaledPosition (this, pinch, scaleFactor);
ScaleAndRepositionChildViews (pinch, scaleFactor);
pinchesConsumed = true;
}
}
return pinchesConsumed;
}
public virtual bool ConsumeGestures(GestureSamples gestureSamples)
{
bool gestureConsumed = false;
if (IsTapEnabled) {
List<GestureSample> taps = gestureSamples.GetSamples (GestureType.Tap);
foreach (GestureSample tap in taps) {
if (IsGestureWithinView (tap)) {
OnTap (this);
gestureConsumed = true;
break;
}
}
}
if (IsDoubleTapEnabled && ! gestureConsumed) {
List<GestureSample> doubleTaps = gestureSamples.GetSamples (GestureType.DoubleTap);
foreach (GestureSample doubleTap in doubleTaps) {
if (IsGestureWithinView (doubleTap)) {
OnDoubleTap (this);
gestureConsumed = true;
break;
}
}
}
if (IsHoldEnabled && ! gestureConsumed) {
List<GestureSample> holds = gestureSamples.GetSamples (GestureType.Hold);
foreach (GestureSample hold in holds) {
if (IsGestureWithinView (hold)) {
OnHold (this);
gestureConsumed = true;
break;
}
}
}
return gestureConsumed;
}
public override bool ConsumeGestures(GestureSamples gestureSamples)
{
return ConsumeDrags (gestureSamples) || ConsumePinches (gestureSamples);
}
public override bool ConsumeGestures(GestureSamples gestureSamples)
{
// Overlays consume all gestures so that they don't pass through to lower layers
return true;
}
public ScreenLayers()
{
Gestures = new GestureSamples ();
Clear ();
}
internal bool ConsumeGestures(GestureSamples gestureSamples)
{
// Iterate through the view layers, starting at the top
for (int layer = Layers.Length-1; layer >= 0; layer--) {
List<View> viewLayer = Layers [layer];
foreach (View view in viewLayer) {
if (view.Visible && view.ConsumeGestures (gestureSamples)) {
return true;
}
}
}
return false;
}
