/// <summary>
/// Attach an event tracker to the current map view model
/// </summary>
private void AttachMap()
{
var mapViewModel = MapViewModel;
if (mapViewModel != null)
{
_activeEventTracker = new MapPopupMenuEventTracker(this);
mapViewModel.InteractionHandler.EventTrackers.Add(_activeEventTracker);
mapViewModel.PropertyChanged += MapViewModelPropertyChanged;
mapViewModel.TrailLayer.Drawing.ContentsChanged += TrailLayerContentChanged;
}
}
/// <summary>
/// Detach the active map event tracker
/// </summary>
private void DetachMap()
{
var tracker = _activeEventTracker;
var mapViewModel = MapViewModel;
_activeEventTracker = null;
if (tracker != null && mapViewModel != null)
{
mapViewModel.InteractionHandler.EventTrackers.Remove(tracker);
mapViewModel.PropertyChanged -= MapViewModelPropertyChanged;
mapViewModel.TrailLayer.Drawing.ContentsChanged -= TrailLayerContentChanged;
}
}
