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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;
namespace Tango.Scripting.Editors.Rendering
{
/// <summary>
/// The control that contains the text.
///
/// This control is used to allow other UIElements to be placed inside the TextView but
/// behind the text.
/// The text rendering process (VisualLine creation) is controlled by the TextView, this
/// class simply displays the created Visual Lines.
/// </summary>
/// <remarks>
/// This class does not contain any input handling and is invisible to hit testing. Input
/// is handled by the TextView.
/// This allows UIElements that are displayed behind the text, but still can react to mouse input.
/// </remarks>
sealed class TextLayer : Layer
{
/// <summary>
/// the index of the text layer in the layers collection
/// </summary>
internal int index;
public TextLayer(TextView textView) : base(textView, KnownLayer.Text)
{
}
List<VisualLineDrawingVisual> visuals = new List<VisualLineDrawingVisual>();
internal void SetVisualLines(ICollection<VisualLine> visualLines)
{
foreach (VisualLineDrawingVisual v in visuals) {
if (v.VisualLine.IsDisposed)
RemoveVisualChild(v);
}
visuals.Clear();
foreach (VisualLine newLine in visualLines) {
VisualLineDrawingVisual v = newLine.Render();
if (!v.IsAdded) {
AddVisualChild(v);
v.IsAdded = true;
}
visuals.Add(v);
}
InvalidateArrange();
}
protected override int VisualChildrenCount {
get { return visuals.Count; }
}
protected override Visual GetVisualChild(int index)
{
return visuals[index];
}
protected override void ArrangeCore(Rect finalRect)
{
textView.ArrangeTextLayer(visuals);
}
}
}
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