E4OutlineTreePart.java example

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/**
 * Copyright 2004-2016 Riccardo Solmi. All rights reserved.
 * This file is part of the Whole Platform.
 *
 * The Whole Platform is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The Whole Platform is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
 */
package org.whole.lang.e4.ui.parts;

import java.util.List;

import org.eclipse.e4.core.contexts.ContextInjectionFactory;
import org.eclipse.e4.core.contexts.EclipseContextFactory;
import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.ui.model.application.ui.basic.MPart;
import org.eclipse.swt.widgets.Composite;
import org.whole.lang.bindings.IBindingManager;
import org.whole.lang.e4.ui.actions.DerivedLinkableSelectionListener;
import org.whole.lang.e4.ui.actions.ILinkableSelectionListener;
import org.whole.lang.e4.ui.actions.IE4UIConstants;
import org.whole.lang.e4.ui.actions.LinkType;
import org.whole.lang.model.IEntity;
import org.whole.lang.ui.viewers.IEntityPartViewer;
import org.whole.lang.util.EntityUtils;

/**
 * @author Enrico Persiani
 */
public class E4OutlineTreePart extends E4TreePart {

	protected IEntityPartViewer createEntityViewer(Composite parent) {
		IEntityPartViewer viewer = super.createEntityViewer(parent);
		setSelectionLinkable(createSelectionLinkable(viewer));
		return viewer;
	}

	protected ILinkableSelectionListener createSelectionLinkable(IEntityPartViewer viewer) {
		IEclipseContext params = EclipseContextFactory.create();
		// we need to pass the viewer because it has not been set in the active context
		params.set(IEntityPartViewer.class, viewer);
		return ContextInjectionFactory.make(OutlineDerivedLinkableSelectionListener.class, context,
				configureSelectionLinkable(params));
	}

	protected IEclipseContext configureSelectionLinkable(IEclipseContext params) {
		params.set(ILinkableSelectionListener.LINK_TYPE, LinkType.ACTIVE_PART);
		params.set(ILinkableSelectionListener.SHARE_EDIT_DOMAIN, true);
		params.set(ILinkableSelectionListener.SYNCHRONIZE_SELECTION, true);
		params.set(ILinkableSelectionListener.IGNORABLE_PART_IDS, IE4UIConstants.DERIVED_PARTS_ID_SET);
		return params;
	}

	public static class OutlineDerivedLinkableSelectionListener extends DerivedLinkableSelectionListener {

		@SuppressWarnings("unchecked")
		@Override
		public void selectionChanged(MPart part, Object selection) {
			if (lastSelection != null && part.getElementId().equals(IE4UIConstants.OUTLINE_PART_ID) && selection instanceof IBindingManager) {
				IEntityPartViewer lastLinkedViewer = (IEntityPartViewer) lastSelection.wGetValue("viewer");
				List<IEntity> selectedEntities = (List<IEntity>) ((IBindingManager) selection).wGet("selectedEntities");
				lastLinkedViewer.selectAndReveal(EntityUtils.mapEntities(selectedEntities, lastLinkedViewer.getEntityContents()), false);
			} else
				super.selectionChanged(part, selection);
		}
	}
}