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get the length of an arrow (association connector) [message #518911]

Fri, 05 March 2010 07:23

Eclipse User

Hi,

I need the length of arrows that links the objects on the diagram. Is there a way to do that? My background is a scaled image of a map. With the exact scale, I wanted to know the real length of the linkEditPart. The arrows are drowned in the "Manhattan" mode.

Thanks,
Daniele

refresh the length of an arrow (association connector) [message #519796 is a reply to message #518911]

Tue, 09 March 2010 20:32

Eclipse User

ok, i calculate the lenght of an arrow in this way (this=linkEditPart)

Quote:

double length = 0;
PointList punti = this.getPrimaryShape().getPolygonPoints();
for (int i = 0; i < punti.size()-1; i++)
{length = length + (punti.getPoint(i).getDistanceOrthogonal(punti.getPoint(i+1) ));
// 28 pixel = 1 cm.
}
length = (length/28);
int temp = (int)(length*10);
length = (temp/10.0);
return (length);

I put the length returned in the label of the connection.
Where should I put this code, so that when I resize the arrow, its length is immediatly updated ?

[Updated on: Tue, 09 March 2010 20:34] by Moderator

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