CODEWITHSUNDEEP
enterprise-architect
BIndu_Madhav
BIndu_Madhav

Reputation: 597

How to get the position of connectors on a diagram in Enterprise Architect?

I have a usecase diagram with an actor and a usecase and there is an association between the two. I want to get the source and target position of the association on the diagram. I tried considering the SX,SY,EX,EY points of the connector in the PDATA5 column of the t_connector table but it doesn't make sense for most of the connectors as they are 0 in most cases.

Is there any other way to get the positions of the connectors on the diagram?

Upvotes: 1

Views: 461

Answers (2)

qwerty_so
qwerty_so

Reputation: 36295

Well, it's complicated. EA renders connectors internally. In your case you have a plain rendering. So what EA does is to find the centers of the two connected elements by looking at the element positions on the diagram (via t_diagramobjects). As you might know, EA considers all elements to be rectangular. Use cases and actors the same. This is why connectors do not attach to visible borders but swivel around an invisible frame. Now the geometric centers are calculated and the attachment to those frames (which is simple geometry).

You need to look into t_diagramlinks for the connector as well, but only if you shift attachment point or introduce bends. And of course if you have special renderings (like tree style which makes completely different things you can't re-compute (simply)). The geometry will tell how shifts are made. And the path reveals the bends. Again just simple geometry if you have standard Custom Lines being set. For every other line style: you better don't ask.

Upvotes: 1

Kalina Mielke
Kalina Mielke

Reputation: 111

From DB side: t_diagramlinks.geometry (SX,SY)(EX,EY)=(0,0)(0,0) - probably the line from the center of the object to the center. EDGE - where the connector starts (1 top, 2 right, 3 bottom,4 left) from the source object, t_diagramlinks.path - additional break points etc.

Upvotes: 0

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