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POIs this an Adorner BUG?
 

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  1. POIs this an Adorner BUG?
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    <p>I've encountered a strange problem working with adorners.By using a class inheriting from Adorner,I try to draw a line in a ScrollViewer dynamically.It works well when the line is shorter than a particular length(about 600),but if I tried to scroll the ScrollViewer and draw the line longer,the problem came.The line appeared to be clipped and the rest part which is longer than 600 seemed to be invisible. I had checked the line's X1,X2,Y1,Y2,it seemed to be correct.Could you please give some advices?Thanks a lot!</p> <h2>Here is my Adorner Class</h2> <pre><code> internal class LinkGanttTaskAdorner : Adorner { private readonly Line child = null; private double x2 = 0; private double y2 = 0; private double x1 = 0; private double y1 = 0; public LinkGanttTaskAdorner(UIElement adornedElement) : base(adornedElement) { var brush = new VisualBrush(adornedElement); child = new Line { Stroke = Brushes.Black, StrokeThickness = 1 }; } protected override Size MeasureOverride(Size constraint) { child.Measure(constraint); return child.DesiredSize; } protected override Size ArrangeOverride(Size finalSize) { child.Arrange(new Rect(finalSize)); return finalSize; } protected override Visual GetVisualChild(int index) { return child; } protected override int VisualChildrenCount { get { return 1; } } public double X1 { get { return x1; } set { x1 = value; child.X1 = value; } } public double Y1 { get { return y1; } set { y1 = value; child.Y1 = value; } } public double X2 { get { return x2; } set { x2 = value; child.X2 = value; UpdatePosition(); } } public double Y2 { get { return y2; } set { y2 = value; child.Y2 = value; UpdatePosition(); } } private void UpdatePosition() { var adornerLayer = this.Parent as AdornerLayer; if (adornerLayer != null) { adornerLayer.Update(AdornedElement); } } </code></pre> <hr> <h2>By using the MouseMove event to Draw the line</h2> <pre><code> private void DragLinkStarted() { isMoveTask = false; isLinkTask = true; linkAdorner = new LinkGanttTaskAdorner(originalElement) { X1 = startMousePoint.X, Y1 = startMousePoint.Y }; var layer = AdornerLayer.GetAdornerLayer(originalElement); layer.Add(linkAdorner); Cursor = Cursors.Cross; } private void DragLinkMoved() { mousePoint = Mouse.GetPosition(originalElement); linkAdorner.X2 = mousePoint.X; linkAdorner.Y2 = mousePoint.Y; } </code></pre>
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    1. USJerry Nixon - MSFT
    1. USClaw
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      1. POIs this an Adorner BUG?
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    2. VO
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    1. COEvery have any luck on this? I'm encountering a similar problem: http://stackoverflow.com/questions/10065130/include-adorner-in-scrollviewer-scrollable-region
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      1. POIs this an Adorner BUG?
      1. USRyan Norbauer
 

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