自定义用户控件的Silverlight SetTargetProperty

问题描述

我正在尝试对动态创建的曲线上的自定义用户控件进行动画处理.
我需要更改该用户控件的3个属性，分别称为.X，.Y和.Angle.
我使用3个DoubleAnimationUsingKeyFrames，每个属性一个，但是我不知道如何在SetTargetProperty中引用属性.

我尝试使用2个仅属性X和Y来代替用户控件的Left和Top属性，并通过以下方式进行设置:
Storyboard.SetTargetProperty(Anim_X，New PropertyPath(((Canvas.Left)"))
Storyboard.SetTargetProperty(Anim_Y，New PropertyPath(((Canvas.Top)"))
可以，但是如何设置角度旋转?

谢谢

I''m trying to animate a Custom User Control on a curve dynamically created.
I need to change 3 properties called .X, .Y and .Angle of that user control.
I use 3 DoubleAnimationUsingKeyFrames, one for each property, but I don''t know how to reference properties in SetTargetProperty.

I tryed with 2 only properties X and Y using instead Left and Top properties of my user control and setting them in this way:
Storyboard.SetTargetProperty(Anim_X, New PropertyPath("(Canvas.Left)")
Storyboard.SetTargetProperty(Anim_Y, New PropertyPath("(Canvas.Top)")
It works but how to set Angle rotation?

Thanks

推荐答案

<usercontrol x:class="Coach2D_SL.UC1" xmlns:x="#unknown">
    Xmlns … >

    <stackpanel x:name="Sp" background="Transparent" margin="100,100,0,0">
        <border name="Border1" background="transparent" borderbrush="transparent" borderthickness="2" x:uid="mbi">
            <grid>
                                           Width="56" Height="56" />
            </grid>
        </border>
    </stackpanel>
</usercontrol>

代码隐藏

CodeBehind

Partial Public Class UC1
    Inherits UserControl

    Public WriteOnly Property Position As Integer()
        Set(value As Integer())
            Sp.Margin = New Thickness(value(0) - image1.Width / 2, value(1) - image1.Height / 2, 0, 0)
        End Set
    End Property

    Public WriteOnly Property RotationAngle As Double
        Set(value As Double)
            Rotate.Angle = value
            image1.RenderTransform = Rotate
        End Set
    End Property


End Class

MainPage.xaml

MainPage.xaml

. . .
    xmlns:uc1="clr-namespace:SilverlightApplication1"
. . .

代码隐藏

CodeBehind

Imports SilverlightApplication1.UC1

Partial Public Class MainPage
    Inherits UserControl

    Dim Uc1 As New UC1
  Private Sub Canvas1_Loaded(sender As Object, e As System.Windows.RoutedEventArgs) Handles Canvas1.Loaded

      Uc1.Position = {70, 150}
      Canvas1.Children.Add(Uc1)
End Sub

    Private Sub Button1_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles Button1.Click

        '' Prepare animation
        Actpts_X = New DoubleCollection
        Actpts_Y = New DoubleCollection
        ActAng = New DoubleCollection
        ''
        Dim Anim_X As New DoubleAnimationUsingKeyFrames
        Dim Anim_Y As New DoubleAnimationUsingKeyFrames
        Dim AnimAng As New DoubleAnimationUsingKeyFrames
        ''
        Dim d As New Duration(TimeSpan.FromSeconds(T))
        Anim_X.Duration = d
        Anim_Y.Duration = d
        AnimAng.Duration = d
        '' Create Frames
        For i  = 0 To PolyLine1.Points.Count - 1
            Actpts_X.Add(PolyLine1.Points(i).X - Canvas1.Margin.Left)
            Actpts_Y.Add(PolyLine1.Points(i).Y - Canvas1.Margin.Top)
            Anim_X.KeyFrames.Add(New DiscreteDoubleKeyFrame() With { _
             .Value = PolyLine1.Points(i).X, _
             .KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(i / speed)) _
                })
            Anim_Y.KeyFrames.Add(New DiscreteDoubleKeyFrame() With { _
             .Value = PolyLine1.Points(i).Y, _
             .KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(i / speed)) _
                })
            AnimAng.KeyFrames.Add(New DiscreteDoubleKeyFrame() With { _
             .Value = RotAng(i), _
             .KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(i / speed)) _
                })
        Next


        Dim SB As New Storyboard
        Canvas1.Resources.Add("unique_id", SB)
        SB.Duration = d
        SB.Children.Add(Anim_X)
        SB.Children.Add(Anim_Y)
        SB.Children.Add(AnimAng)
        ''

        Storyboard.SetTargetProperty(Anim_X, New PropertyPath("(Uc1.X)"))
        Storyboard.SetTargetProperty(Anim_Y, New PropertyPath("(Uc1.Y)"))
        Storyboard.SetTargetProperty(AnimAng, New PropertyPath("(Uc1.Angle)"))
        ''
        Storyboard.SetTarget(Anim_X, Uc2)
        Storyboard.SetTarget(Anim_Y, Uc2)
        Storyboard.SetTarget(AnimAng, Uc2)
        ''
        SB.Begin()



    End Sub

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