35 lines
854 B
C#
35 lines
854 B
C#
using System.Windows;
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using System.Windows.Media;
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namespace Microsoft.Research.DynamicDataDisplay.Navigation
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{
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/// <summary>Base class for all navigation providers</summary>
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public abstract class NavigationBase : ViewportElement2D
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{
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protected NavigationBase()
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{
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ManualTranslate = true;
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ManualClip = true;
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Loaded += NavigationBase_Loaded;
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}
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private void NavigationBase_Loaded(object sender, RoutedEventArgs e)
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{
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OnLoaded(e);
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}
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protected virtual void OnLoaded(RoutedEventArgs e)
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{
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// this call enables contextMenu to be shown after loading and
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// before any changes to Viewport - without this call
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// context menu was not shown.
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InvalidateVisual();
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}
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protected override void OnRenderCore(DrawingContext dc, RenderState state)
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{
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dc.DrawRectangle(Brushes.Transparent, null, state.Output);
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}
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}
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}
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