97 строки
2.7 KiB
C#
97 строки
2.7 KiB
C#
//
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// ImageAdorner.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.Controls;
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using System.Windows.Documents;
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using System.Windows.Media;
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namespace Xwt.WPFBackend
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{
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public class ImageAdorner
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: Adorner
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{
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public ImageAdorner (UIElement owner, object image)
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: base (owner)
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{
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var source = DataConverter.AsImageSource (image);
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this.child = new Image {
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Source = source,
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Width = source.Width,
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Height = source.Height
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};
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}
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public System.Windows.Point Offset
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{
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set
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{
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this.offset = value;
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UpdatePosition ();
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}
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}
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public override GeneralTransform GetDesiredTransform (GeneralTransform transform)
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{
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GeneralTransformGroup result = new GeneralTransformGroup();
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result.Children.Add (transform);
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result.Children.Add (new TranslateTransform (this.offset.X, this.offset.Y));
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return result;
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}
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private System.Windows.Point offset;
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private readonly UIElement child;
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protected override System.Windows.Size MeasureOverride (System.Windows.Size constraint)
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{
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this.child.Measure (constraint);
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return this.child.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.child.Arrange (new Rect (this.child.DesiredSize));
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return finalSize;
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}
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protected override Visual GetVisualChild (int index)
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{
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return this.child;
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}
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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 void UpdatePosition()
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{
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AdornerLayer layer = (AdornerLayer) Parent;
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if (layer != null)
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layer.Update (AdornedElement);
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}
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}
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} |