56 lines
1.6 KiB
C#
56 lines
1.6 KiB
C#
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#if !NETSTANDARD2_0
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Windows;
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using System.Windows.Media;
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namespace PdfSharp.Windows
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{
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// Create a host visual derived from the FrameworkElement class.// This class provides layout, event handling, and container support for// the child visual objects.
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/// <summary>
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/// Used to present Visuals in the PagePreview.
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/// </summary>
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public class VisualPresenter : FrameworkElement
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="VisualPresenter"/> class.
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/// </summary>
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public VisualPresenter()
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{
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_children = new VisualCollection(this);
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}
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/// <summary>
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/// Gets the number of visual child elements within this element.
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/// </summary>
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protected override int VisualChildrenCount
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{
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get { return _children.Count; }
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}
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/// <summary>
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/// Overrides <see cref="M:System.Windows.Media.Visual.GetVisualChild(System.Int32)"/>, and returns a child at the specified index from a collection of child elements.
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/// </summary>
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protected override Visual GetVisualChild(int index)
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{
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if (index < 0 || index >= _children.Count)
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throw new ArgumentOutOfRangeException("index");
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return _children[index];
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}
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/// <summary>
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/// Gets the children collection.
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/// </summary>
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public VisualCollection Children
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{
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get { return _children; }
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}
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readonly VisualCollection _children;
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}
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}
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#endif
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