protected override void DisconnectHandler(SKCanvasView nativeView)
{
touchHandler?.Detach(nativeView);
touchHandler = null;
nativeView.PaintSurface -= OnPaintSurface;
base.DisconnectHandler(nativeView);
}
protected override void Dispose(bool disposing)
{
// detach all events before disposing
var controller = (ISKCanvasViewController)Element;
if (controller != null)
{
controller.SurfaceInvalidated -= OnSurfaceInvalidated;
controller.GetCanvasSize -= OnGetCanvasSize;
}
var control = Control;
if (control != null)
{
control.PaintSurface -= OnPaintSurface;
}
// detach, regardless of state
touchHandler.Detach(control);
base.Dispose(disposing);
}