using System.Windows;

using System.Windows.Media;



namespace Microsoft.Research.DynamicDataDisplay.Navigation

{

    /// <summary>Base class for all navigation providers</summary>

	public abstract class NavigationBase : ViewportElement2D {

		protected NavigationBase() {

			ManualTranslate = true;

			ManualClip = true;

			Loaded += NavigationBase_Loaded;

		}



		private void NavigationBase_Loaded(object sender, RoutedEventArgs e) {

			OnLoaded(e);

		}



		protected virtual void OnLoaded(RoutedEventArgs e) { }



		protected override void OnRenderCore(DrawingContext dc, RenderState state) {

			Color color = Color.FromArgb(0, 0, 0, 0);

			dc.DrawRectangle(new SolidColorBrush(color), null, state.Output);

		}

	}

}