Thanks Alex,

I did not finished reading the chapter about RTBuilder yet. But regardless of the GraphET2 scope, having a pie diagram builder is important for Pharo (I don't know the status of PieChartMorph but I will check).

I have tried two different directions. One is adding a RTLabel to each sector shape in #getElementsFromModels

GET2PieDiagram>>getElementsFromModels

   ...
            label := RTLabel new text: model key.
            shape := shape + label.
   ...

| diag |
diag := GET2DiagramBuilder new.
(diag pieDiagram)
    function: #value;
    models: {'A' -> 30 . 'B' -> 10 . 'C' -> 20 . 'D' -> 40};
    color: [ Color random ].
^ diag open.

Another one is using #modelLabels: to add labels to axis:

| diag |
diag := GET2DiagramBuilder new.
(diag pieDiagram)
    modelLabels: #key;
    function: #value;
    models: {'A' -> 30 . 'B' -> 10 . 'C' -> 20 . 'D' -> 40};
    color: [ Color random ].
^ diag open.

but none of them positions the labels nicely. If anyone wants to comment would be very welcome :)

Cheers,

Hernán

2014-07-26 14:14 GMT-03:00 Alexandre Bergel <alexandre.bergel@me.com>:

Hi Hernán,

Thanks for your effort. This is very valuable.
However, I am not sure a pie diagram should be part of GraphET. A pie is radically different from a curve. Maybe subclassing the class RTBuilder is the way to go. You will then not be constraint by GraphET for the labeling...

Cheers,
Alexandre

On Jul 25, 2014, at 8:41 PM, Hernán Morales Durand <hernan.morales@gmail.com> wrote:

> Hello
>
> I am trying GET2 pieDiagram builder. You may want to add a random color in the #pieExample method so it looks nicer (see attachment):
>
> | diag |
> diag := GET2DiagramBuilder new.
> (diag pieDiagram)
> models: #(30 10 20 40);
> color: [ Color random ].
> ^ diag open.
>
> Now my question is simple, but I don't know how to start
>
> How would you add labels to each sector?
>
> Hernán
>
>

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