/// <summary>
/// This view's owner (ModelView) receives the: ShouldRecognizeSimultaneouslyWithGestureRecognizer
/// callback for each of its delegates.
/// </summary>
public void SetupGestureRecognizers()
{
// Pinch - Zoom
ZoomRecognizer = new UIPinchGestureRecognizer(this, new Selector("ZoomCameraWithGesture:"));
ZoomRecognizer.Enabled = false;
ZoomRecognizer.Delegate = new GestureDelegate(this);
View.AddGestureRecognizer(ZoomRecognizer);
// Orbit & Dolly
OrbitDollyRecognizer = new OrbitDollyGestureRecognizer();
OrbitDollyRecognizer.AddTarget(this, new Selector("OrbitDollyCameraWithGesture:"));
OrbitDollyRecognizer.MaximumNumberOfTouches = 2;
OrbitDollyRecognizer.Enabled = false;
OrbitDollyRecognizer.Delegate = new GestureDelegate(this);
View.AddGestureRecognizer(OrbitDollyRecognizer);
// Zoom Extents / Restore Last View
DoubleTapGestureRecognizer = new UITapGestureRecognizer();
DoubleTapGestureRecognizer.AddTarget(this, new Selector("ZoomExtentsWithGesture:"));
DoubleTapGestureRecognizer.NumberOfTapsRequired = 2;
DoubleTapGestureRecognizer.Enabled = false;
View.AddGestureRecognizer(DoubleTapGestureRecognizer);
}
private void OrbitDollyCameraWithGesture(OrbitDollyGestureRecognizer gesture)
{
if (Camera == null)
{
return;
}
if (gesture.State == UIGestureRecognizerState.Began)
{
ActiveGesturesCount++;
}
if (gesture.State == UIGestureRecognizerState.Changed)
{
FastDrawing = true;
CameraIsAtInitialPosition = false;
if (gesture.HasSingleTouch)
{
Camera.GestureOrbit(View.Bounds.Size.ToSize(), gesture.AnchorLocation, gesture.CurrentLocation);
gesture.AnchorLocation = gesture.CurrentLocation;
}
if (gesture.HasTwoTouches)
{
Camera.LateralPan(gesture.StartLocation, gesture.MidpointLocation, false, false);
gesture.StartLocation = gesture.MidpointLocation;
}
View.SetNeedsDisplay();
}
if (gesture.State == UIGestureRecognizerState.Ended || gesture.State == UIGestureRecognizerState.Cancelled)
{
ActiveGesturesCount--;
}
}