如何在 windows phone 8 应用程序中以编程方式从一个 canvas 获取手势以在另一个 canvas 上设置

Question

我正在创建简单的 canvas 应用程序，它是从名为 canvas 的 canvas 中获取签名的，"ContentPanelCanvas" 来自名为 "pop-up" 的网格，并且要从 "Pop-up" 设置签名并在 canvas 上设置名为 "maincanvas"。如果你知道请帮助我解决这个问题如何获取 canvas 上下文并将其设置为空白 canvas.Here 是我使用的代码。

在Xaml中：

<Grid x:Name="ContentPanel">
    <Grid.RowDefinitions>
           <RowDefinition Height="*"></RowDefinition>
           <RowDefinition Height="Auto"></RowDefinition>
    </Grid.RowDefinitions>
     <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"></ColumnDefinition>
     </Grid.ColumnDefinitions>
     <Grid Grid.Column="0">
            <Canvas Name="maincanvas">

            </Canvas>
        </Grid>

    <Grid  Name="Popup" Visibility="Collapsed" Grid.Row="0" Width="480" Height="300" Background="Black">
            <Grid.RowDefinitions>
                <RowDefinition Height="*"></RowDefinition>
                <RowDefinition Height="Auto"></RowDefinition>
            </Grid.RowDefinitions>
            <Grid Grid.Row="0">
            <Canvas Name="ContentPanelCanvas"  Background="Beige">

            </Canvas>
            </Grid>
            <Grid Grid.Row="1" HorizontalAlignment="Center">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"></ColumnDefinition>
                    <ColumnDefinition Width="*"></ColumnDefinition>
                </Grid.ColumnDefinitions>
                <Button Grid.Column="0" x:Name="btnOK" Content="OK" Tap="btnOK_Tap"/>
                <Button Grid.Column="1" x:Name="btnCancel" Content="Clear" Tap="btnCancel_Tap"/>
            </Grid>
        </Grid>
</Grid>

这是 .CS 文件：

    private Point currentPoint;
    private Point oldPoint;
    Line line;

    public SingleImage()
    {
        InitializeComponent();
        this.ContentPanelCanvas.MouseMove += new MouseEventHandler(ContentPanelCanvas_MouseMove);
        this.ContentPanelCanvas.MouseLeftButtonDown += new MouseButtonEventHandler(ContentPanelCanvas_MouseLeftButtonDown);

    }

    void ContentPanelCanvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        currentPoint = e.GetPosition(ContentPanelCanvas);
        oldPoint = currentPoint;
    }

    void ContentPanelCanvas_MouseMove(object sender, MouseEventArgs e)
    {

        currentPoint = e.GetPosition(this.ContentPanelCanvas);

        line = new Line() { X1 = currentPoint.X, Y1 = currentPoint.Y, X2 = oldPoint.X, Y2 = oldPoint.Y };

        line.Stroke = new SolidColorBrush(Colors.Purple);
        line.StrokeThickness = 3;

        this.ContentPanelCanvas.Children.Add(line);
        oldPoint = currentPoint;
    }

    private void Button_Tap(object sender, System.Windows.Input.GestureEventArgs e)
    {
        Popup.Visibility = Visibility.Visible;
        ContentPanelCanvas.Children.Clear();
    }

    private void btnOK_Tap(object sender, System.Windows.Input.GestureEventArgs e)
    {
        Popup.Visibility = Visibility.Collapsed;          
       // Here i want to set signature to main canvas how to pass signature
          from one canvas to another?//    
    }

    private void btnCancel_Tap(object sender, System.Windows.Input.GestureEventArgs e)
    {
        ContentPanelCanvas.Children.Clear();
    }

Answer 1

private void btnOK_Tap(object sender, System.Windows.Input.GestureEventArgs e)
    {
        Popup.Visibility = Visibility.Collapsed;          
         int k = ContentPanelCanvas.Children.Count;
          for (int i = 0; i < k; i++)
          {
              line =(System.Windows.Shapes.Line)    ContentPanelCanvas.Children[0];
              line.StrokeThickness = 3;
              ContentPanelCanvas.Children.RemoveAt(0);
              maincanvas.Children.Add(line);
           }

    }

如何在 windows phone 8 应用程序中以编程方式从一个 canvas 获取手势以在另一个 canvas 上设置

How to get guesture from one canvas to set on another canvas programatically in windows phone 8 app

windows-phone-8