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我想在WPF中繪製兩個形狀並將它們合併在一起。然後，我想將拖放事件附加到原始形狀之一。在WPF中合併形狀並附加部分拖放
所以基本上，只有當你點擊形狀的某個部分時，你才能拖動，但它會拖動整個形狀。
下面是一些代碼：
// 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
此代碼創建兩個圓圈（一個大的和小的）。我希望只能在點擊小圖標時才能拖動，但我想將它們連接起來，以便它們可以一起移動，而無需手動添加代碼來處理此問題。