Question

有人可以帮我解决这个问题：如何将数字划分为字段，因此根据鼠标点击哪个区域会进行特定事件？

    private void LayoutRoot_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        //if (!isDragging)
        {
            //creating of my  user control element
            NodePicture node = new NodePicture();
            node.Width = 100;
            node.Height = 100;

            //use cursor position as the center of the figure
            Point point = e.GetPosition(this);
            node.SetValue(Canvas.TopProperty, point.Y - node.Height / 2);
            node.SetValue(Canvas.LeftProperty, point.X - node.Width / 2);
            node.MouseLeftButtonDown += controlReletionshipsLine;
            LayoutRoot.Children.Add(node);
        }
    }

    private void controlReletionshipsLine(object sender, MouseButtonEventArgs e)
    {
        //creating parant element of node
        ParentNode parentNode = new ParentNode();

        //creating connected element of the node
        ConnectedNode connectedNode = new ConnectedNode();

        //creating node element
        NodePicture node = (NodePicture)sender;

        //getting the relative position of the element
        Point point = e.GetPosition(this);

Answer 1

你可以用数学方式划分对象，使用鼠标位置“相对于对象”来决定你点击的位置，或者你可以叠加多个多边形，每个多边形的颜色alpha通道设置为1％（所以他们可以进行重击测试，但不可见。

由于您只想查看单击的圆圈的四分之一，请在LeftMouseButtonDown事件args上调用GetPosition，将控件本身作为参数传递。这将返回一个Point对象，其位置相对于控件的左上角。

然后只是看看它在哪个季度：

private void ControlX_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    // Get the relative position of the element
    Point point = e.GetPosition(sender as UIElement);

    if (point.X > control.Width/2)
    {
        if (point.Y > control.Height/2)
        {
            // You are in the bottom right quarter
        }
        else
        {
            // You are in the top right quarter
        }
    }
    else
    {
        if (point.Y > control.Height/2)
        {
            // You are in the bottom left quarter
        }
        else
        {
            // You are in the top left quarter
        }
    }
}

在您发送给我的示例代码中（controlReletionshipsLine）：

// getting the relative position of the element
Point point = e.GetPosition(this);

应该是：

// getting the relative position of the element
Point point = e.GetPosition(sender as UIElement);

如何使用SilverLight将图形划分为字段

1 个答案: