/// <summary>
/// Starts an animation to the given parameters.
/// </summary>
/// <param name="center"></param>
/// <param name="zoomLevel"></param>
/// <param name="mapTilt"></param>
/// <param name="time"></param>
public void Start(GeoCoordinate center, float zoomLevel, Degree mapTilt, TimeSpan time)
{
lock (this)
{
// stop the previous timer.
if (_timer != null)
{ // timer exists.
//_mapView.Invalidate();
_timer.Stop();
_timer.Dispose();
_timer = null;
}
_timer = new Timer(_minimumTimeSpan.TotalMilliseconds);
_timer.Elapsed += new ElapsedEventHandler(_timer_Elapsed);
// set the targets.
_targetCenter = center;
_targetTilt = mapTilt;
_targetZoom = zoomLevel;
// calculate the animation steps.
_maxSteps = (int)System.Math.Round((double)time.TotalMilliseconds / (double)_minimumTimeSpan.TotalMilliseconds, 0);
_currentStep = 0;
_stepCenter = new GeoCoordinate(
(_targetCenter.Latitude - _mapView.MapCenter.Latitude) / _maxSteps,
(_targetCenter.Longitude - _mapView.MapCenter.Longitude) / _maxSteps);
_stepZoom = (float)((_targetZoom - _mapView.MapZoom) / _maxSteps);
// calculate the map tilt, make sure it turns along the smallest corner.
double diff = _targetTilt.Subtract180(_mapView.MapTilt);
OsmSharp.Logging.Log.TraceEvent("MapViewAnimator", System.Diagnostics.TraceEventType.Information, diff.ToString());
_stepTilt = (diff / _maxSteps);
OsmSharp.Logging.Log.TraceEvent("MapViewAnimator", System.Diagnostics.TraceEventType.Verbose,
string.Format("Started new animation with steps z:{0} t:{1} c:{2} to z:{3} t:{4} c:{5} from z:{6} t:{7} c:{8}.",
_stepZoom, _stepTilt, _stepCenter.ToString(),
_targetZoom, _targetTilt, _targetCenter.ToString(),
_mapView.MapZoom, _mapView.MapTilt, _mapView.MapCenter.ToString()));
// disable auto invalidate.
//_mapView.AutoInvalidate = false;
_mapView.RegisterAnimator(this);
// start the timer.
_timer.Enabled = true;
_timer.Start();
}
}