91 строка
2.8 KiB
C#
91 строка
2.8 KiB
C#
//
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// TreeViewDropAdorner.cs
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//
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// Author:
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// Eric Maupin <ermau@xamarin.com>
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//
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// Copyright (c) 2012 Xamarin, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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using System.Windows;
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using System.Windows.Documents;
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using System.Windows.Media;
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using System.Windows.Shapes;
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namespace Xwt.WPFBackend
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{
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public class TreeViewDropAdorner
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: Adorner
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{
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public TreeViewDropAdorner (ExTreeViewItem item, RowDropPosition position)
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: base (item)
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{
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IsHitTestVisible = false;
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double indent = ((item.Level + 1) * LevelToIndentConverter.IndentSize) + 5;
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this.shape = new System.Windows.Shapes.Rectangle();
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this.shape.Stroke = Brushes.DimGray;
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this.shape.Width = item.ActualWidth - indent;
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switch (position) {
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case RowDropPosition.Into:
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this.shape.Height = item.ActualHeight;
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this.shape.Margin = new Thickness (indent, 0, 0, 0);
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this.shape.StrokeDashArray = new DoubleCollection { 1, 0, 1 };
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break;
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case RowDropPosition.Before:
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this.shape.Height = 1;
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this.shape.Margin = new Thickness (indent, 0, 0, 0);
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break;
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case RowDropPosition.After:
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this.shape.Height = 1;
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this.shape.Margin = new Thickness (indent, item.ActualHeight, 0, 0);
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break;
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}
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}
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private readonly Shape shape;
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protected override int VisualChildrenCount
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{
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get { return 1; }
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}
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protected override Visual GetVisualChild (int index)
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{
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return this.shape;
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}
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protected override System.Windows.Size MeasureOverride(System.Windows.Size constraint)
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{
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this.shape.Measure (constraint);
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return this.shape.DesiredSize;
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}
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protected override System.Windows.Size ArrangeOverride(System.Windows.Size finalSize)
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{
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this.shape.Arrange (new Rect (this.shape.DesiredSize));
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return finalSize;
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}
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}
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} |