[news.eclipse.newcomer] Re: Paint events in Composite

[Ric Wright <riwright@xxxxxxxxx>]

I am reposting to the SWT list as that looks like a more appropriate place.
Sorry for the noise.  Of course if anyone does have the answer...  :-)


On 4/16/09 9:52 AM, in article C60CB043.2727C%riwright@xxxxxxxxx, "Ric
Wright" <riwright@xxxxxxxxx> wrote:

> I am writing a program that has a rather elaborate "editor" akin to the PDE.
> I have most of it working and am working on the last part of the UI.  I have
> a FormPage which hosts a TabFolder which has one or more TabItems in it.
> That all works fine.  Now I want to have various kinds of widgets hosted in
> the Tabs.  One of them is my JOGL OpenGL view.  Normally I simply host it in
> a ViewPart and then instantiate it thusly:
> 
> // we can't use the default Composite because using the AWT bridge
> 
> // requires that it have the property of SWT.EMBEDDED
> 
> Composite composite = new Composite(parent, SWT.EMBEDDED);
> 
> // set the layout so our canvas fills the whole control
> 
> composite.setLayout(new FillLayout());
> 
> 
> // create the special frame bridge to AWT
> 
> java.awt.Frame glFrame = SWT_AWT.new_Frame(composite);
> 
> 
> // we need the listener so we get the GL events
> 
> this.canvas.addGLEventListener(this);
> 
> 
> // finally, add our canvas as a child of the frame
> glFrame.add(this.canvas);
> 
> This all works fine.  I created a new class that subclasses Composite to
> create a GLComposite.  I then create an instance of that:
> 
> CTabItem viewItem = new CTabItem(tabFolder.SWT.NULL);
> Composite composite = new Composite(tabFolder, SWT.NONE);
> GLComposite glView = new GLComposite(composite);
> ViewItem.setControl(composite);
> 
> This all "works" fine - there are no exceptions thrown and I can debug
> through my GL routines, but nothing gets painted on the tab.  And my GL
> render only gets called if I explicitly call redraw on the glView object.
> 
> So... Any suggestions?  What is the proper approach to this?  I'll keep
> poking at it, but any suggestions are welcome.
> 
> TIA, Ric
>