/**
 * 
 */
package org.eclipse.epf.diagramming.base.actions;

import org.eclipse.epf.diagramming.edit.parts.ActivityEditPart;
import org.eclipse.gef.EditPart;
import org.eclipse.gmf.runtime.diagram.ui.services.editpart.EditPartService;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;

/**
 * Refresh action refreshes the DiagramEditPart, performs deactivate and activate. 
 * 
 * @author Shashidhar Kannoori
 *
 */
public class RefreshAction implements IObjectActionDelegate {

	private ActivityEditPart editPart;
	/**
	 * 
	 */
	public RefreshAction() {
		// TODO Auto-generated constructor stub
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IObjectActionDelegate#setActivePart(org.eclipse.jface.action.IAction, org.eclipse.ui.IWorkbenchPart)
	 */
	public void setActivePart(IAction action, IWorkbenchPart targetPart) {
		// TODO Auto-generated method stub

	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
	 */
	public void run(IAction action) {
		// TODO Auto-generated method stub
		Diagram diagram = (Diagram) editPart.getModel();
		EditPart parent = editPart.getParent();
		if (editPart.isActive()) {
			editPart.deactivate();
		}
		//TODO: set The consumer.
		//diagram.removeConsumer(this);
		//createEditPart();
		editPart = (ActivityEditPart)EditPartService.getInstance().createGraphicEditPart(diagram);
		editPart.setParent(parent);
		parent.getViewer().setContents(editPart);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection)
	 */
	public void selectionChanged(IAction action, ISelection selection) {
		editPart = null;
		if (selection instanceof IStructuredSelection) {
			IStructuredSelection structuredSelection = (IStructuredSelection) selection;
			if (structuredSelection.size() == 1
					&& structuredSelection.getFirstElement() instanceof ActivityEditPart) {
				editPart = (ActivityEditPart) structuredSelection
						.getFirstElement();
			}
		}
		if(editPart != null){
			Diagram diagram = (Diagram)editPart.getModel();
			if(diagram != null){
//				NodeAdapter adapter= BridgeHelper.getNodeAdapter(diagram.getElement());
//				if(((VariabilityElement)adapter.getElement()).getVariabilityBasedOnElement() == null)
//					action.setEnabled(false);
				action.setEnabled(true);

			}
		}else{
			action.setEnabled(false);
		}

	}

}