UpToAction.java

package net.ms.designer.actions;

import net.ms.designer.core.MsContext;
import net.ms.designer.core.MsElement;
import net.ms.designer.editors.packages.ui.PackageEditor;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;
import org.eclipse.ui.internal.UIPlugin;


public class UpToAction implements IWorkbenchWindowActionDelegate
{
	private IWorkbenchWindow window;
	private PackageEditor editor;
	private MsContext context;
	
	/**
	 * The constructor.
	 */
	public UpToAction()
	{
		
	}
	/**
	 * The action has been activated. The argument of the
	 * method represents the 'real' action sitting
	 * in the workbench UI.
	 * @see IWorkbenchWindowActionDelegate#run
	 */
	public void run(IAction action) 
	{
		this.editor = (PackageEditor)UIPlugin.getDefault()
						.getWorkbench().getActiveWorkbenchWindow()
						.getActivePage().getActiveEditor();
		this.context = this.editor.getContext();
		MsElement element = this.editor.getCurrentElement();
		if(element.getParent() == null)
		{
			return;
		}
		MsElement parent = element.getParent();
		this.context.changeContext(parent);
	}
	/**
	 * Selection in the workbench has been changed. We 
	 * can change the state of the 'real' action here
	 * if we want, but this can only happen after 
	 * the delegate has been created.
	 * @see IWorkbenchWindowActionDelegate#selectionChanged
	 */
	public void selectionChanged(IAction action, ISelection selection) 
	{
		
	}

	/**
	 * We can use this method to dispose of any system
	 * resources we previously allocated.
	 * @see IWorkbenchWindowActionDelegate#dispose
	 */
	public void dispose() 
	{
		
	}

	/**
	 * We will cache window object in order to
	 * be able to provide parent shell for the message dialog.
	 * @see IWorkbenchWindowActionDelegate#init
	 */
	public void init(IWorkbenchWindow window) 
	{
		this.window = window;
	}
}