Re: [platform-swt-dev] kombining GLCanvas/Composite and Button classes i

[Pere Estaques <pestatije@xxxxxxxxx>]

Hi Peter,
as a general rule you should not subclass Button (or so say the Button javadocs), so option II is the way to go.
However you cannot implement Button; you should just subclass Composite, and pretend you are implementing Button (just the methods you are interested in: I imagine you'll want addSelectionListener, for instance).



peto <peter.fodrek@xxxxxxxx> wrote:
>  Dear conference,
>
> I am t o  to design own class for openGL rendered Button. I am to combine 
> Button and Composite and add GLCanvas object into Composite part of me class.
>
> I was metioned two way to do so
>
> I.
> OglButton extends Buttton implements Composite{
>  private Composite LocalComposite;
>  void changed(Control[] changed)
>  {
>   LocalComposite.changed(changed);
>  }
>
> .......
> }
>
>
> or II.
> OglButton extends
>  Composite implements Button{
> // same binding as above
> .......
> }
>
> Could anyone reply me which is recomended way to create such new widget, 
> please? (I know about paint listener)
>
>
> I look forward heraing from you
>
> Yours faithfully
>
> Peter Fodrek
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> platform-swt-dev@xxxxxxxxxxx
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