bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/ContentsContribution.java

package org.eclipse.ui.internal.provisional.views.markers;

import org.eclipse.jface.action.ContributionItem;
import org.eclipse.jface.action.IContributionItem;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.ui.views.markers.internal.MarkerSupportRegistry;

/**
 * ContentsContribution is the class that defines the content selection
 * contribution for the {@link ExtendedMarkersView}.
 * 
 * @since 3.4
 * 
 */
public class ContentsContribution extends MarkersContribution {

	/**
	 * Create a new instance of the receiver.
	 */
	public ContentsContribution() {
		super();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.actions.CompoundContributionItem#getContributionItems()
	 */
	protected IContributionItem[] getContributionItems() {

		MarkerContentGenerator[] generators = MarkerSupportRegistry
				.getInstance().getGenerators();
		IContributionItem[] items = new IContributionItem[generators.length];
		for (int i = 0; i < generators.length; i++) {
			final MarkerContentGenerator generator = generators[i];
			items[i] = new ContributionItem() {

				/*
				 * (non-Javadoc)
				 * 
				 * @see org.eclipse.jface.action.ContributionItem#fill(org.eclipse.swt.widgets.Menu,
				 *      int)
				 */
				public void fill(Menu menu, int index) {
					MenuItem item = new MenuItem(menu, SWT.CHECK);
					item.setText(generator.getName());
					ExtendedMarkersView view = getView();
					item.addListener(SWT.Selection, getMenuItemListener(
							generator, view));
					if (view != null && view.isShowing(generator))
						item.setSelection(true);
				}

				/**
				 * Create a menu listener for the generator and the view.
				 * 
				 * @param generator
				 * @param view
				 * @return Listener
				 */
				private Listener getMenuItemListener(
						final MarkerContentGenerator generator,
						final ExtendedMarkersView view) {
					return new Listener() {
						/*
						 * (non-Javadoc)
						 * 
						 * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
						 */
						public void handleEvent(Event event) {
							if (view != null)
								view.setContentGenerator(generator);
						}
					};
				}
			};
		}
		return items;
	}
}