我已经完成了一个简单的userControl对象“MilObject”，它将遵循鼠标在InkCancas上完成的路径。我的问题是动画不想开始。好吗？
这是我的inkCanvas背后的代码：
private void myInkCanvas_StrokeCollected(object sender, InkCanvasStrokeCollectedEventArgs e)
{
if (myInkCanvas.Children.Count > 0)
{
myInkCanvas.Children.RemoveAt(0);
}
MilObject myObj = new MilObject();
InkCanvas.SetLeft(myObj, (e.Stroke.StylusPoints[0].X));
InkCanvas.SetTop(myObj, (e.Stroke.StylusPoints[0].Y));
myObj.Height = 100;
myObj.Width = 100;
myObj.Color = myColorPicker.SelectedColor;
myInkCanvas.Children.Add(myObj);
if (myInkCanvas.Children.Count > 0)
{
MilObject myMilObject = myInkCanvas.Children[0] as MilObject;
myMilObject.RenderTransformOrigin = new Point(0.5, 0.5);
//get the path from the mouse mouvements points collection
myPath = new PathGeometry();
Geometry temp = e.Stroke.GetGeometry();
myPath.AddGeometry(temp);
//create the MatrixAnimationUsingPath
MatrixAnimationUsingPath myanimation = new MatrixAnimationUsingPath();
myanimation.PathGeometry = myPath;
myanimation.FillBehavior = FillBehavior.HoldEnd;
myanimation.Duration = TimeSpan.FromSeconds(60);
myanimation.DoesRotateWithTangent = true;
//Set the static parameters for the Storyboard
Storyboard.SetTarget(myanimation, myMilObject);
Storyboard.SetTargetProperty(myanimation,new PropertyPath("(UIElement.RenderTransform).(MatrixTransform.Matrix)"));
Storyboard.SetTargetName(myanimation, "myMilObject");
// Create a Storyboard to contain and apply the animation.
Storyboard pathAnimationStoryboard = new Storyboard();
//begin the animation
pathAnimationStoryboard.Children.Add(myanimation);
pathAnimationStoryboard.Duration = myanimation.Duration;
pathAnimationStoryboard.Begin();
}
}
这是我的XAML userControl MilObject
<UserControl x:Name="MilObject1" x:Class="MilOpViewer.MilObject"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
Height="100" Width="100">
<UserControl.RenderTransform>
<TransformGroup>
<TranslateTransform X="-50" Y="-50"></TranslateTransform>
<MatrixTransform></MatrixTransform>
</TransformGroup>
</UserControl.RenderTransform>
<UserControl.Resources>
<DrawingBrush x:Key="plane1" Stretch="Uniform">
<DrawingBrush.Drawing>
<DrawingGroup x:Name="myGroup">
<DrawingGroup.Children>
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<GeometryDrawing.Pen>
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</GeometryDrawing.Pen>
</GeometryDrawing>
<GeometryDrawing Geometry="F1 M 872.54,231.206L 872.54,221.801C 872.54,217.808 877.945,214.574 884.61,214.574C 891.277,214.574 896.681,217.808 896.681,221.801L 896.681,236.278">
<GeometryDrawing.Pen>
<Pen Thickness="4.476" MiterLimit="2.75" Brush="White"/>
</GeometryDrawing.Pen>
</GeometryDrawing>
<GeometryDrawing Geometry="F1 M 767.389,262.994L 713.797,231.206L 872.54,231.206L 872.54,262.994L 767.389,262.994 Z ">
<GeometryDrawing.Pen>
<Pen Thickness="4.69334" MiterLimit="2.75" Brush="White"/>
</GeometryDrawing.Pen>
</GeometryDrawing>
<GeometryDrawing Geometry="F1 M 872.54,262.994L 872.54,231.206">
<GeometryDrawing.Pen>
<Pen Thickness="4.476" MiterLimit="2.75" Brush="White"/>
</GeometryDrawing.Pen>
</GeometryDrawing>
<GeometryDrawing Geometry="F1 M 903.119,234.533L 905.13,234.533C 912.242,234.533 918.005,240.325 918.005,247.47C 918.005,254.614 912.242,260.407 905.13,260.407L 903.119,260.407C 900.771,260.407 898.576,259.765 896.682,258.661L 896.682,236.278C 898.576,235.175 900.771,234.533 903.119,234.533 Z ">
<GeometryDrawing.Pen>
<Pen Thickness="6.39867" MiterLimit="2.75" Brush="White"/>
</GeometryDrawing.Pen>
</GeometryDrawing>
</DrawingGroup.Children>
</DrawingGroup>
</DrawingBrush.Drawing>
</DrawingBrush>
</UserControl.Resources>
<Grid
Background="{DynamicResource ResourceKey=plane1}">
</Grid>
答案 0 :(得分：0)
问题是matrixTransform包含在TransformGroup中。所以解决方案是：
Storyboard.SetTargetProperty(myanimation, new PropertyPath("(UIElement.RenderTransform).(TransformGroup.Children)[0].(MatrixTransform.Matrix)"));
谢谢