/**
* Licensed to Neo Technology under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Neo Technology licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.neo4j.neoclipse.action.view;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IMenuCreator;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.zest.core.viewers.ZoomContributionViewItem;
import org.neo4j.neoclipse.action.AbstractGraphAction;
import org.neo4j.neoclipse.action.Actions;
import org.neo4j.neoclipse.view.NeoGraphViewPart;
/**
* This action allows to zoom in / out the graph view.
*
* @author Peter Hänsgen
*/
public class ZoomAction extends AbstractGraphAction implements IMenuCreator
{
/**
* The zoom menu.
*/
private Menu menu;
/**
* The constructor.
*/
public ZoomAction( final NeoGraphViewPart view )
{
super( Actions.ZOOM, Action.AS_DROP_DOWN_MENU, view );
setMenuCreator( this );
}
/**
* Executes the default action, which sets zoom level to page.
*/
@Override
public void run()
{
// represents 100%, workaround for non-public API of zoom manager
graphView.getZoomableViewer().zoomTo( 0, 0, 0, 0 );
}
/**
* Returns a menu with the default zoom levels.
*/
@Override
public Menu getMenu( final Control parent )
{
if ( menu == null )
{
menu = new Menu( parent );
ZoomContributionViewItem zoom = new ZoomContributionViewItem(
graphView );
zoom.fill( menu, 0 );
}
return menu;
}
/**
* Returns a menu with the default zoom levels.
*/
@Override
public Menu getMenu( final Menu parent )
{
if ( menu == null )
{
menu = new Menu( parent );
ZoomContributionViewItem zoom = new ZoomContributionViewItem(
graphView );
zoom.fill( menu, 0 );
}
return menu;
}
/**
* Disposes the zoom level menu.
*/
@Override
public void dispose()
{
if ( menu != null )
{
menu.dispose();
}
}
}