相对于矩形而不是窗体绘制线 [英] Draw Line Relative to rectangle instead of form

问题描述

我有一个大小为500,500的表格，它有一个大小为800,800的矩形，我可以拖动该矩形，现在我想相对于矩形而不是表格来画一条线.即，我想在600到700的点上画一条线.怎么可能.
感谢

I have a form of size 500,500 and it has a rectangle of size 800,800 i can drag the rectangle,now i want to draw a line relative to rectangle instead of form .i.e i want to draw a line a point 600 to 700. how is possible.
Thanks

推荐答案

好吧，这里可能适用一些简单的常识.如果您的矩形已被拖动到100、50，并且您想从矩形的角开始画一条线，那么您如何确定从哪里开始呢?我的猜测是，从矩形的位置100、50开始.

Well, some simple common sense might apply here. If your rectangle has been dragged to 100, 50, and you want to start a line from the corner of the rectangle, how do you think you''d work out where to start ? My guess is, start at 100, 50, the position of the rectangle.

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