Well,
If you started with the Easel then you must have seen the examples. Well at first you see two boxes with examples inside (one on the top and the other below (If you dont see the second one just drag the view).�

The first one has a label at the top-left corner that says ROMondrianExample, and this were done using the ROMondrianViewBuilder API, and you can see that you interact mainly with the "view" variable.
The second box is called ROExample and then you interact mainly with the "rawView" variable which is pure Roassal.

The difference between them is that the ROMondrianViewBuilder is a nice and friendly API, but doing really complex stuff it's not possible. So we go one level below to pure Roassal.

Here you have the Collection class hierarchy in Roassal:
|rawView|
rawView := ROView new.
Collection withAllSubclasses do: [ :c |�
| el |
el := ROBorder elementOn: c.
el @ ROPopup.
rawView add: el ].

"Draw edges"
rawView addAll: (ROEdge�
buildEdgesFromElements: rawView elements�
from: �[ :cls | cls superclass ] �
to: #yourself�
using: ROLine new).
ROTreeLayout on: rawView elementsNotEdge edges: rawView elementsAsEdge.
rawView open.

I recommend you to see the ROExamples and if there is something that you don't know just ask to the mailing list.
You may like to see the ROExamples>>interactions>>addingOnClick example.


2013/9/20 roberto.minelli@usi.ch <roberto.minelli@usi.ch>
Thanks Alejandro, I will try what you propose!

What do you mean by
> Another thing bothering me is that you mentioned the method #nodes, thats from the ROMondrianViewBuilder, which I think is not that friendly with dynamic stuff.

How would you construct a view without using the ROMondrianViewBuilder? I am used to start as in the Roassal Easel like
� � � � rawView := ROView new.
� � � � view := ROMondrianViewBuilder view: rawView

And then adding nodes to the view, calling view nodes: myNodes

Cheers,
R



On Sep 20, 2013, at 1:49 PM, Alejandro Infante <alejandroinfante91@gmail.com>
�wrote:

> In Roassal calling the method #signalUpdate to the view should show those new nodes. If you want to re-layout the nodes you should apply a new layout to the nodes before the #signalUpdate.
>
> Another pretty interesting feature is the method ROContainer>>callback: aCallback. The idea is that every time an element is added inside the container the callback is called.
> Now how you can use this:
>
> element callback: (ROContainerCallbackLayout new layout: (ROGridLayout new gapSize: 2)).
>
> Remember that you must send signalUpdate to the view if you want to see the changes.
>
> Another thing bothering me is that you mentioned the method #nodes, thats from the ROMondrianViewBuilder, which I think is not that friendly with dynamic stuff.
> It is a little bit ugly but you can always get the ROView from ROMondrianViewBuilder sending the message #view and over that do all kind of Roassal magic stuff, like adding the callback with the TreeLayout the the ROView itself. Also for adding new nodes you should add them directly to the ROView, or at least I haven't found the way to do that without having to add all the nodes again to the Builder.
>
> Hope that help you.
>
>
> 2013/9/20 roberto.minelli@usi.ch <roberto.minelli@usi.ch>
> *and have the visualization re-layouted?
>
> On Sep 20, 2013, at 11:24 AM, "roberto.minelli@usi.ch" <roberto.minelli@usi.ch>
> �wrote:
>
> > Hi,
> >
> > I was playing around with Roassal (in particular, a tree map) and I have a question: Is there a way to dynamically adding nodes? I mean, once the view is generated to update the #nodes by adding a new node (and associations as well, i.e., edges) and have the visualization re-
> >
> > Thanks in advance.
> >
> > Roby
>
>
>