h2. IEEFTabDescriptorProvider

This extension point allows the contribution of an @org.eclipse.eef.ide.ui.api.widgets.IEEFLifecycleManagerProvider@ which can be used to create an instance of @org.eclipse.eef.ide.ui.api.widgets.IEEFLifecycleManager@ for the description of some controls. With this mechanism, you can not only provide the compulsory lifecycle manager of a custom widget but you can also replace the default lifecycle manager of any widget or container which gives you the ability to change the behavior and appearance of each part of the user interface (excluding groups and pages).

bc.. <extension
      point="org.eclipse.eef.properties.ui.eefTabDescriptorProvider">
   <descriptor
         class="org.eclipse.eef.sample.internal.extensions.SampleTabDescriptorProvider"
         description="Provides EEF Tab descriptors"
         id="org.eclipse.eef.sample.eefTabDescriptorProvider"
         label="EEF Sample Tab Descriptor Provider">
   </descriptor>
</extension>
p. Example of IEEFTabDescriptorProvider contribution. In this example, we are providing a contribution used to add new tabs to the Properties view created by EEF. In order to link an editor with the EEF-based Properties view, you will first need to use the method org.eclipse.core.runtime.IAdaptable.getAdapter(Class) of your editor to return an EEF-based property sheet page.

bc.. @Override
public Object getAdapter(@SuppressWarnings("rawtypes") Class type) {
    if (type == IPropertySheetPage.class) {
        // Must be unique for your editor, should be stored in a static constant
        String contributorId = "org.eclipse.eef.sample.contributorId";
        return new EEFTabbedPropertySheetPage(type, contributorId);
    }

    return super.getAdapter(type);
}
p. Once the Eclipse platform has retrieved this EEF-based tabbed property sheet page, EEF will look for the list of tabs to display in this property view using all its IEEFTabDescriptorProvider. Here is an implementation of an example:


bc.. package org.eclipse.eef.sample.internal.extensions;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.eclipse.eef.EEFViewDescription;
import org.eclipse.eef.core.api.EEFExpressionUtils;
import org.eclipse.eef.core.api.EEFPage;
import org.eclipse.eef.core.api.EEFView;
import org.eclipse.eef.core.api.EEFViewFactory;
import org.eclipse.eef.core.api.EditingContextAdapter;
import org.eclipse.eef.ide.ui.properties.api.EEFTabDescriptor;
import org.eclipse.eef.properties.ui.api.IEEFTabDescriptor;
import org.eclipse.eef.properties.ui.api.IEEFTabDescriptorProvider;
import org.eclipse.eef.properties.ui.api.IEEFTabbedPropertySheetPageContributor;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.sirius.common.interpreter.api.IVariableManager;
import org.eclipse.sirius.common.interpreter.api.VariableManagerFactory;
import org.eclipse.ui.IWorkbenchPart;

public class SampleTabDescriptorProvider implements IEEFTabDescriptorProvider {

    @Override
    public Collection<IEEFTabDescriptor> get(IWorkbenchPart part, ISelection selection, IEEFTabbedPropertySheetPageContributor contributor) {
        if (selection instanceof IStructuredSelection) {
            IStructuredSelection structuredSelection = (IStructuredSelection) selection;
            Object[] objects = structuredSelection.toArray();

            // We will first retrieve the description of the user interface
            EEFViewDescription viewDescription = this.getViewDescription(objects);
            EEFView eefView = this.createEEFView(viewDescription, objects);

            List<IEEFTabDescriptor> descriptors = new ArrayList<IEEFTabDescriptor>();
            List<EEFPage> eefPages = eefView.getPages();
            for (EEFPage eefPage : eefPages) {
                descriptors.add(new EEFTabDescriptor(eefPage));
            }
            return descriptors;
        }
        return new ArrayList<IEEFTabDescriptor>();
    }

    private EEFViewDescription getViewDescription(Object object) {
        // Programmatically create the description of the view or load it from an EMF model
        return null;
    }

    private EEFView createEEFView(EEFViewDescription viewDescription, Object object) {
        IVariableManager variableManager = new VariableManagerFactory().createVariableManager();
        variableManager.put(EEFExpressionUtils.SELF, object);
        
        // See the documentation regarding the interpreter and the editing context adapter
        EEFView eefView = new EEFViewFactory().createEEFView(viewDescription, variableManager, new SampleInterpreter(), new SampleEditingContextAdapter(), object);
        return eefView;
    }
}
p. This example requires at least the following dependencies:

* org.eclipse.sirius.common.interpreter
* org.eclipse.eef
* org.eclipse.eef.core
* org.eclipse.eef.ide.ui.properties
* org.eclipse.eef.properties.ui
* org.eclipse.ui.workbench
* org.eclipse.jface
