Call this member function repeatedly to redraw a drag rectangle.
反复调用该成员函数以重新绘制一个拖动的矩形。
It is actually this rectangle that you drag to another element.
实际上是将这个矩形拖放到另一个元素。
Select the Rounded rectangle Tool (u) and then drag out your footer sized rectangle.
选择圆角矩形工具(U)在也叫拖动出一个圆角矩形。
Finally, the done method, seen in Listing 7, removes the translucent rectangle, because the drag-and-drop process is now over.
最后，done方法(参见清单7)删除这个透明矩形，因为拖放过程现在已经结束。
One of the drag handlers, rectangle_drag_handler, is responsible for attaching to the cursor a translucent rectangle that represents the element being dragged.
其中的一个拖动处理程序rectangle_drag_handler负责向光标附加一个代表被拖动元素的透明矩形。
Select the Zoom In tool on the toolbar and drag a rectangle over the map.
选择放大工具然后在地图上拖动画一个矩形。
Select the Zoom In tool on the toolbar and drag a rectangle over the map.
选择放大工具然后在地图上拖动画一个矩形。
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