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source: branches/ALPS/HeuristicLab.ExtLibs/HeuristicLab.AvalonEdit/5.0.1/AvalonEdit-5.0.1/Rendering/TextLayer.cs @ 12048

Last change on this file since 12048 was 11700, checked in by jkarder, 10 years ago

#2077: created branch and added first version

File size: 2.9 KB
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1// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
2//
3// Permission is hereby granted, free of charge, to any person obtaining a copy of this
4// software and associated documentation files (the "Software"), to deal in the Software
5// without restriction, including without limitation the rights to use, copy, modify, merge,
6// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
7// to whom the Software is furnished to do so, subject to the following conditions:
8//
9// The above copyright notice and this permission notice shall be included in all copies or
10// substantial portions of the Software.
11//
12// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
13// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
14// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
15// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
16// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
17// DEALINGS IN THE SOFTWARE.
18
19using System;
20using System.Collections.Generic;
21using System.Windows;
22using System.Windows.Input;
23using System.Windows.Media;
24
25namespace ICSharpCode.AvalonEdit.Rendering
26{
27  /// <summary>
28  /// The control that contains the text.
29  ///
30  /// This control is used to allow other UIElements to be placed inside the TextView but
31  /// behind the text.
32  /// The text rendering process (VisualLine creation) is controlled by the TextView, this
33  /// class simply displays the created Visual Lines.
34  /// </summary>
35  /// <remarks>
36  /// This class does not contain any input handling and is invisible to hit testing. Input
37  /// is handled by the TextView.
38  /// This allows UIElements that are displayed behind the text, but still can react to mouse input.
39  /// </remarks>
40  sealed class TextLayer : Layer
41  {
42    /// <summary>
43    /// the index of the text layer in the layers collection
44    /// </summary>
45    internal int index;
46   
47    public TextLayer(TextView textView) : base(textView, KnownLayer.Text)
48    {
49    }
50   
51    List<VisualLineDrawingVisual> visuals = new List<VisualLineDrawingVisual>();
52   
53    internal void SetVisualLines(ICollection<VisualLine> visualLines)
54    {
55      foreach (VisualLineDrawingVisual v in visuals) {
56        if (v.VisualLine.IsDisposed)
57          RemoveVisualChild(v);
58      }
59      visuals.Clear();
60      foreach (VisualLine newLine in visualLines) {
61        VisualLineDrawingVisual v = newLine.Render();
62        if (!v.IsAdded) {
63          AddVisualChild(v);
64          v.IsAdded = true;
65        }
66        visuals.Add(v);
67      }
68      InvalidateArrange();
69    }
70   
71    protected override int VisualChildrenCount {
72      get { return visuals.Count; }
73    }
74   
75    protected override Visual GetVisualChild(int index)
76    {
77      return visuals[index];
78    }
79   
80    protected override void ArrangeCore(Rect finalRect)
81    {
82      textView.ArrangeTextLayer(visuals);
83    }
84  }
85}
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