As Nicolai said, you need to explicitly say that you want the edges to be considered in the layout using #useInLayout.
Additionally, you may want to play with the charge and length in the layout. Consider the following example:
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
builder := RTGraphBuilder new.
builder nodes shape: (RTEllipse new size: 20).
builder edges
connectTo: [ :c | c subclasses ];
useInLayout;
shape: (RTLine new color: Color gray).
builder layout force
charge: -300;
length: 20.
builder addAll: Boolean allSuperclasses, Boolean withAllSubclasses.
builder build.
builder view
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
We give a repulsion of -300 to each node (which is what you want since nodes have to repulse each other), and you give a length of 20 pixel to each edge.
You end up with something like:
Cheers,
Alexandre
--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel
http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
> On Nov 10, 2014, at 8:17 AM, Natalia Tymchuk
natalia.tymchuk@unikernel.net wrote:
>
> Hello.
> I’m trying to use Force based layout to position some elements. I expected to get the image like this.
> <Screen Shot 2014-11-10 at 11.16.54.png>
> Using this code
http://ws.stfx.eu/LACEUL5X6K1S http://ws.stfx.eu/LACEUL5X6K1S I got something different and I don’t know why.
> <Screen Shot 2014-11-10 at 12.01.11 PM.png>
> It looks like all elements attract instead of repel each other. Does somebody know why it is like that?
>
> Best regards,
> Natalia
>
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