| Connection Anchors [message #164264] |
Tue, 18 January 2005 10:43 |
 Fabian Wolf
Messages: 96
Registered: July 2009 |
Member |
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Hi,
in my GEF-Editor I want the objects to have an "infinite" number of anchor
points along some drawn line on the figure.
To get this done, I wrote an anchor class that extends
AbstractConnectionAnchor.
It's : public getLocation(Point referencePoint) : method checks if the
referencePoint is inside the owner figure returned by getOwner();
It then asks the owner figure to give back an anchor point.
My figures look like this (figure 1 and figure 2):
----- -----
I f1 I I f2 I
----- -----
I I
I----------Connection--------->I
I I
I----------Connection--------->I
I I
I'm now failing to fully understand how these anchor coordinates are
determined. What exactly happens, when I draw a connection from a source to
a target figure. How is the target coordinate determined?
I want to be able to draw a connection from f1 (all along the long straight
line) to f2 (also all along the straight line). How could I get it to not
move the anchor coordinates when moving the figures. When moving the
figures, I don't want the connection to travel up and down the line.
All this is done, using the com.realpersist.gef.schemaeditor as a base.
A basic introduction what exactly happens when drawing connections or an
"anchor introduction" is very welcome :)
Thanks a lot!!
Fabian
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