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POinteractive planar straight line graph in swing
 

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    <p>I am trying to draw an interactive planar straight line graph (PSLG) on a JApplet. I am using mouse-clicks to determine the vertices of the PSLG. </p> <p>Here is the algorithm which I am following for drawing edges of the PSLG 1. The point where user performs a mouse-click is added as a vertex of the PSLG. 2. If he clicks a second point,an edge is directly created among the point and the previously clicked-point</p> <p>Here are certain flaws which I observed due to the use of this algorithm:</p> <ol> <li>Inability to create disjoint-planar sets like say just a line segment</li> <li>A closed polygon is only created if the user clicks at the exact location where the start point was [Essentially, if the user clicks very close to the start point, there is no way to tell that this point is actually the start point since it appears within a certain tolerance range from the point].</li> </ol> <p>I've checked out some similar questions over here and people suggest to use the <strong>JFreeChart</strong> library. But as far as I get, the scenario in those questions was that the points of the PSLG were already known. I do not know whether <strong>JFreeChart</strong> can be used for creating interactive PSLG's </p> <p>I thought about adding points and having a button which would say add edges among points,but if that's the case selecting the 2 points will still involve the proximity problem encountered in 2.</p> <p>I was wondering if anybody could suggest me a better approach on how to handle this situation.</p> <p>Thanks in advance</p>
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    1. COI'm not sure I understand your problem #1, but for #2, you could pop up a menu on right click allowing the user to close the polygon if desired.
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