Draw a line connecting two rectangles

Question

I create my own class diagram application in Swing / AWT, but I settled on this function:

• I want to draw a line between the selected rectangle of the class and the target rectangle of the class, but there is a function in the line that occurs when I move one of the rectangles, the connecting line is bent in a direct way, following the moving rectangle, I hope that the following picture will demonstrate that I want to achieve:

General guidance or sample code is welcome.

Answer 1

I do not know Java, but the steps you could follow are as follows:

• Find the middle of each line of rectangles (should be easy, just avarage x1 + x2 and y1 + y2)
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• xb, yb ( ). , xa-xb ya-yb ( , ). ( ?), , , xa, ya xa, yb xa, ya xb, ya, , .
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Answer 2

http://java-sl.com/connector.html , .

Answer 3

observer . , , "" . , , 2 .

Answer 4

"ConnectionLine" . ( uml), . , , ), "LineSegment". , , .

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