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Dynamically change the anchor points. [message #167055]

Sat, 05 February 2005 01:27

Eclipse User

Originally posted by: jsk_lam.hotmail.com

Hi,

I would like to change the anchor point of the figure dynamically
and programmatically based on the orientation of the nodes.
For example, the following diagram shows the link that connects
figure A and B on either left or right side of the figure:

A <---------> B

B <---------> A

Could someone please help on this?

Thanks,
SL

Re: Dynamically change the anchor points. [message #167063 is a reply to message #167055]

Sat, 05 February 2005 04:07

Eclipse User

slam wrote:

> Hi,
>
> I would like to change the anchor point of the figure dynamically
> and programmatically based on the orientation of the nodes.
> For example, the following diagram shows the link that connects
> figure A and B on either left or right side of the figure:
>
> A <---------> B
>
> B <---------> A
>
> Could someone please help on this?
>
> Thanks,
> SL

What I did was, I put the calculation of the anchor points inside the figure
and let validate() call the calculation method which in turn fills a List
with all valid anchors.

Looking at your drawing, some questions come to my mind:

Why not having one (or more) anchors at the left and right hand side of your
figure? Each of them could be used to connect.

Why not using ChopboxAnchor, which "automatically" places the anchor point
on the right edge.

Regards,
Fabian

Re: Dynamically change the anchor points. [message #167226 is a reply to message #167055]

Sun, 06 February 2005 17:44

Eclipse User

slam wrote:

> Hi,
>
> I would like to change the anchor point of the figure dynamically
> and programmatically based on the orientation of the nodes.
> For example, the following diagram shows the link that connects
> figure A and B on either left or right side of the figure:
>
> A <---------> B
>
> B <---------> A
>
> Could someone please help on this?
>
> Thanks,
> SL
>
>
I did this by creating my own anchor that "decided" which side to place
itself on in its getLocation method. If you look at the source for
ChopBoxAnchor you will see a more general version of this. In
particular pay attention to the conversions to/from absolute coordinates
- that tripped me up for a while.

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