Re: [Roassal]Text on edges ? - Moose-dev

30 Jan 2014

The problem here is that you are mixing Mondrian code and Roassal code. It is like putting
some C or Assembly code in your Java code. You can do it, but you need to know exactly
what’s going on.

Without Mondrian, you can have:
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
| v e1 e2 l lbl |
v := ROView new.
e1 := (ROBox new size: 30) element.
e2 := (ROBox new size: 30) element.
l := ROLine elementFrom: e1 to: e2.

lbl := (ROLabel text: 'hello world') element.
ROConstraint stick: lbl between: e1 and: e2. "locate the label between 2 nodes"

e1 @ RODraggable.
e2 @ RODraggable.

v add: e1; add: e2; add: l; add: lbl.
v open
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

If you really wish to stick to Mondrian, you can do:

-=-=-=-=-=-=-=-=
| b |
b:= ROMondrianViewBuilder new.
b shape circle size: 30.
b nodes: #(1 2).

b edgeFromAssociation: 1 -> 2.
b open.

b view edges do: [ :edge | 
	| lbl |
	lbl := (ROLabel text: 'hello world') element.
	b view add: lbl.
	ROConstraint stick: lbl between: edge from and: edge to.
].
-=-=-=-=-=-=-=-=

Cheers,
Alexandre

On Jan 30, 2014, at 6:51 AM, Vincent Blondeau &lt;vincent.blondeau(a)polytech-lille.net&gt;
wrote:

...
  Le 29/01/2014 11:49, Alexandre Bergel a écrit :
  Vincent, did it work?  Not really...

 The code I use is :

     //Node and edges creation
     ...
     view shape label centeredLabel. 
     labelNode := view node: 'Hello'. "create the label I want between
(it's for the example)"
     ROConstraint stick: labelNode between: view edges first from and: view edges first
to. "locate the label between 2 nodes"
     view treeLayout.
     view open

 A text "hello" is displayed but at the begining, the text is misplaced :
 <Mail Attachment.txt>
 If I move one of the nodes linked to the edge, the text moves to the right location (the
picture at the bottom, shows what  I want to do :) )
 <Mail Attachment.txt>
  But the text doesn't stay on the edge but it's between the left sides of the
nodes...

 <Mail Attachment.txt>
 Do I use the right method and the right arguments ?

 Thanks for helping !

 Vincent

 Alexandre

  On 24 Jan 2014, at 07:11, Vincent Blondeau
&lt;vincent.blondeau(a)polytech-lille.net&gt;
  wrote:

 Hello,

 I use Roassal to visualize a FAST AST as a kind of UML diagram.
 Each node on Roassal is a node of the AST and the edges shows the parent link.
 That's work fine and it's very easy to do it ! Thanks !

 But I would like to add some text on the edges to know what are the instance variables
containing the children nodes.

 I saw the examples and there's not a such functionality.

 Is it possible to add it ?

 Cheers,
 Vincent
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Alexandre Bergel  http://www.bergel.eu
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