/*******************************************************************************
 * Copyright (c) 2007 VTT Technical Research Centre of Finland and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.proconf.g3d.actions;

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

import javax.vecmath.Vector3d;

import org.simantics.db.Graph;
import org.simantics.db.Resource;
import org.simantics.layer0.utils.IEntity;
import org.simantics.layer0.utils.EntityFactory;
import org.simantics.proconf.g3d.Activator;
import org.simantics.proconf.g3d.Resources;
import org.simantics.proconf.g3d.base.G3DTools;
import org.simantics.proconf.g3d.base.ThreeDimensionalEditorBase;
import org.simantics.proconf.g3d.common.OrbitalCamera;
import org.simantics.proconf.g3d.stubs.Tuple3;

public class FocusAction extends ContextAction{

	private OrbitalCamera camera;
	
    Vector3d focusPoint = null;
    
    public FocusAction(ThreeDimensionalEditorBase parent) {
        super(parent);
        camera = parent.getCamera();
    }
    
    public void init() {
        this.setText("Focus");
        this.setToolTipText("Focus");
        this.setImageDescriptor(Activator.imageDescriptorFromPlugin(Activator.PLUGIN_ID, "icons/eye.png"));
    }
    

    
    @Override
  public boolean usable(Graph graph,List<Resource> resources) {
      if (resources.size() != 1)
          return false;
      IEntity t = EntityFactory.create(graph, resources.get(0));
      
      if (t.isInstanceOf(Resources.g3dResource.G3DNode)) {
          Collection<IEntity> p = t.getRelatedObjects(Resources.g3dResource.HasWorldPosition);
          if (p == null || p.size() != 1)
              return false;
          else 
              //focusPoint = new Vector3d(G3DTools.getPoint(new Position(graph,p.iterator().next().getResource())));
              focusPoint = new Vector3d(G3DTools.getPoint(new Tuple3(graph,p.iterator().next().getResource())));
      }
      return true;
  }
    
    public void run() {
        camera.setTarget(focusPoint);
        parent.setViewChanged(true);
    }

   
}