source: stable/HeuristicLab.ExtLibs/HeuristicLab.AvalonEdit/5.0.1/AvalonEdit-5.0.1/Rendering/Layer.cs @ 16662

// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System;
using System.Diagnostics;
using System.Windows;
using System.Windows.Media;

namespace ICSharpCode.AvalonEdit.Rendering
{
  /// <summary>
  /// Base class for known layers.
  /// </summary>
  class Layer : UIElement
  {
    protected readonly TextView textView;
    protected readonly KnownLayer knownLayer;
    
    public Layer(TextView textView, KnownLayer knownLayer)
    {
      Debug.Assert(textView != null);
      this.textView = textView;
      this.knownLayer = knownLayer;
      this.Focusable = false;
    }
    
    protected override GeometryHitTestResult HitTestCore(GeometryHitTestParameters hitTestParameters)
    {
      return null;
    }
    
    protected override HitTestResult HitTestCore(PointHitTestParameters hitTestParameters)
    {
      return null;
    }
    
    protected override void OnRender(DrawingContext drawingContext)
    {
      base.OnRender(drawingContext);
      textView.RenderBackground(drawingContext, knownLayer);
    }
  }
}