private void PerformFlyover(Flyover flyover)
{
if (!flyover.Coordinate.IsValid())
{
return;
}
if (_mapView == null)
{
return;
}
// Increase heading by heading step for _mapCamera
_mapCamera.Heading += Configuration.HeadingStep;
_mapCamera.Heading = _mapCamera.Heading % 360;
// Initialize UIViewPropertyAnimator
_animator = new UIViewPropertyAnimator(
Configuration.Duration,
Curve,
animations: () => {
_mapView.Camera = _mapCamera;
});
// Add completion
_animator?.SetCompletion((a) => {
if (_flyover.NearlyEquals(flyover))
{
PerformFlyover(flyover);
}
});
// Start animation
_animator?.StartAnimation();
}
public void Start(Flyover flyover)
{
// Set flyover
_flyover = flyover;
if (UIApplication.SharedApplication.ApplicationState != UIApplicationState.Active)
{
// Return out of function
return;
}
// Change state
State = FlyoverCameraState.Started;
// Stop current animation
_animator?.ForceStopAnimation();
// Set center coordinate
_mapCamera.CenterCoordinate = flyover.Coordinate;
// Check if duration is zero or the current mapView camera
// equals nearly the same to the current flyover
if (new Flyover(_mapView.Camera).NearlyEquals(_flyover))
{
// Simply perform flyover as we are still looking at the same coordinate
PerformFlyover(flyover);
}
else if (Configuration.RegionChangeAnimation == RegionChangeAnimation.Animated &&
Configuration.Duration > 0)
{
// Apply StartAnimationMode animated
// Initialize start animator
var startAnimator = new UIViewPropertyAnimator(
duration: Configuration.Duration,
curve: Curve,
animations: () => {
_mapView.Camera = _mapCamera;
});
// Add completion
startAnimator.SetCompletion((x) => PerformFlyover(_flyover));
// Start animation
startAnimator.StartAnimation();
}
else
{
// No animation should be applied
// Set MapView Camera to look at coordinate
_mapView.Camera = _mapCamera;
// Perform flyover
PerformFlyover(_flyover);
}
}