[news.eclipse.modeling.gmf] Re: How to call own layoutProvider from "Arr

[Martin Jacob <mj@xxxxxxxxxxxxxx>]

Hi Mariot,

thanks for the hint!
In fact the plugin could not be loaded because a ClassNotFoundException was thrown...
Now I copied the package name and class name to the extension point in plugin.xml. And it works! There must be a typo some where...

Regards,	Martin



Mariot Chauvin wrote, On 29.01.2009 10:46:
> Martin,
>
> Is there another layout defined with the highest priority ?
> If you externalize your layout in a plug-in check that you plug-in started without errors ("Show View" -> "Other" -> "Plug-in Registry").
>
> If you install GMF sdk there is also an example of layout provider ("New" -> "Example/ GMF PLugins/Square layout provider") to compare.
>
> Regards,
>
> Mariot
>
> Martin Jacob a écrit :
> > Hi Mariot,
> >
> > the package and class name in plugin.xml is correct. (I just delete some
> > parts for posting it here)
> > And yes u are right system.out is evil, its just a old habit from C
> > programming....
> >
> > Now I used the debugger but got the same result. My layout provider will
> > not be called :(
> >
> > Any other suggestions?
> >
> > Cheers,        Martin
> >
> > Mariot Chauvin wrote, On 29.01.2009 09:49:
> > > Hi Martin,
> > >
> > > It seems to me that your class value in plugin.xml is not the right one :
> > >
> > > <layoutProvider class="ui.diagram.providers.LayoutProvider">
> > >
> > > should be :
> > >
> > > <layoutProvider class="yourcompany.yourpackage.PscViewerLayoutProvider">
> > >
> > > BTW debugging with system.out is evil :P, why you do not simply add
> > > breakpoints ?
> > >
> > > Regards,
> > >
> > > Mariot
> > >
> > > Martin Jacob a écrit :
> > > > Hi everyone,
> > > >
> > > > I was searching on the mailing list but did  not find a sufficient
> > > > answer fop my problem.
> > > >
> > > > I want to use my own layoutProvider while using the already existing
> > > > menu item "Arrange All".
> > > >
> > > >
> > > > I did the following things so far:
> > > >
> > > > 1. Add the extension point, see below:
> > > >
> > > > <extension name="PSC Viewer Layout Provider"
> > > > point="org.eclipse.gmf.runtime.diagram.ui.layoutProviders">
> > > >    <layoutProvider class="ui.diagram.providers.LayoutProvider">
> > > >       <Priority name="Highest">
> > > >       </Priority>
> > > >    </layoutProvider>
> > > > </extension>
> > > >
> > > >
> > > > 2. Create a class derived from
> > > > org.eclipse.gmf.runtime.diagram.ui.services.layout.AbstractLayoutNodeProvider
> > > >
> > > >
> > > >
> > > > public class PscViewerLayoutProvider extends
> > > > AbstractLayoutNodeProvider {
> > > >
> > > > public Runnable layoutLayoutNodes(List layoutNodes,
> > > >         boolean offsetFromBoundingBox, IAdaptable layoutHint) {
> > > >     System.out.println("layoutNodes: "+layoutNodes.toString());
> > > >     System.out.println("offsetFromBoundingBox: "+offsetFromBoundingBox);
> > > >     System.out.println("layoutHint: "+layoutHint.toString());
> > > >     return null;
> > > > }
> > > >
> > > > public boolean provides(IOperation operation) {
> > > >     System.out.println(""+operation.toString());
> > > >     if (operation instanceof
> > > > org.eclipse.gmf.runtime.diagram.ui.services.layout.ILayoutNodeOperation)
> > > > {
> > > >         System.out.println("true");
> > > >         return true;
> > > >     }
> > > >     System.out.println("false");
> > > >     return false;
> > > > }
> > > > }
> > > >
> > > > I would expect to see at least the println while calling "Arrange All".
> > > > But I don't see any thing at System.out!
> > > >
> > > > Does any one could please give me a hint how to solve the problem?
> > > >
> > > > Thanks, Martin