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我想在WPF中绘制两个形状并将它们合并在一起。然后，我想将拖放事件附加到原始形状之一。在WPF中合并形状并附加部分拖放
所以基本上，只有当你点击形状的某个部分时，你才能拖动，但它会拖动整个形状。
下面是一些代码：
// Set up some basic properties for the two ellipses
Point centerPoint = new Point(100, 100);
SolidColorBrush ellipseColor_1 = new SolidColorBrush(Color.FromArgb(255, 0, 0, 255));
double width_1 = 10; double height_1 = 10;
SolidColorBrush ellipseColor_2 = new SolidColorBrush(Color.FromArgb(50, 255, 0, 0));
double width_2 = 200; double height_2 = 200;
// Create the first ellipse: A small blue dot
// Then position it in the correct location (centerPoint)
Ellipse ellipse_1 = new Ellipse() { Fill = ellipseColor_1, Width = width_1, Height = height_1 };
ellipse_1.RenderTransform = new TranslateTransform(point.X - width_1/2, point.Y - height_1/2);
// Create the second ellipse: A large red, semi-transparent circle
// Then position it in the correct location (centerPoint)
Ellipse ellipse_2 = new Ellipse() { Fill = ellipseColor_2, Width = width_2, Height = height_2 };
ellipse_2.RenderTransform = new TranslateTransform(point.X - width_2/2, point.Y - height_2/2);
// ???
// How should I merge these?
// ???
// Now apply drag drop behavior to ONLY ellipse_1
MouseDragElementBehavior dragBehavior = new MouseDragElementBehavior();
dragBehavior.Attach(ellipse_1); // This may change depending on the above
// ...
// Add new element to canvas
此代码创建两个圆圈（一个大的和小的）。我希望只能在点击小图标时才能拖动，但我想将它们连接起来，以便它们可以一起移动，而无需手动添加代码来处理此问题。