org.eclipse.e4.demo.modifier.SampleView.java Source code

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Here is the source code for org.eclipse.e4.demo.modifier.SampleView.java

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/*******************************************************************************
 * Copyright (c) 2009 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 ******************************************************************************/

package org.eclipse.e4.demo.modifier;

import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.ui.services.IServiceConstants;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;

/**
 *
 */
public class SampleView {
    /**
     * Create the sample view.
     * 
     * @param parent
     * @param selectionService
     */
    public SampleView(Composite parent, final IEclipseContext outputContext, final IExtensionRegistry registry) {
        TreeViewer viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
        viewer.getTree().setData("class", "navigator"); //$NON-NLS-1$ //$NON-NLS-2$
        viewer.addSelectionChangedListener(new ISelectionChangedListener() {
            public void selectionChanged(SelectionChangedEvent event) {
                outputContext.set(IServiceConstants.SELECTION, event.getSelection());
            }
        });
        viewer.setContentProvider(new ITreeContentProvider() {

            public Object[] getChildren(Object parentElement) {
                if (parentElement instanceof IConfigurationElement) {
                    return ((IConfigurationElement) parentElement).getChildren();
                }
                return null;
            }

            public Object getParent(Object element) {
                if (element instanceof IConfigurationElement) {
                    return ((IConfigurationElement) element).getParent();
                }
                return null;
            }

            public boolean hasChildren(Object element) {
                if (element instanceof IConfigurationElement) {
                    return ((IConfigurationElement) element).getChildren().length > 0;
                }
                return false;
            }

            public Object[] getElements(Object inputElement) {
                if (inputElement instanceof IExtension) {
                    return ((IExtension) inputElement).getConfigurationElements();
                }
                return null;
            }

            public void dispose() {
            }

            public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
            }
        });
        viewer.setLabelProvider(new LabelProvider() {
            @Override
            public String getText(Object element) {
                if (element instanceof IConfigurationElement) {
                    IConfigurationElement c = (IConfigurationElement) element;
                    String tag = c.getName();
                    String id = c.getAttribute("id"); //$NON-NLS-1$
                    if (id == null) {
                        id = c.getAttribute("name"); //$NON-NLS-1$
                    }
                    if (id == null) {
                        id = c.getAttribute("api"); //$NON-NLS-1$
                    }
                    if (id == null) {
                        id = c.getAttribute("class"); //$NON-NLS-1$
                    }
                    return tag + "(" + id + ")"; //$NON-NLS-1$ //$NON-NLS-2$
                }
                return ""; //$NON-NLS-1$
            }

            @Override
            public Image getImage(Object element) {
                // TODO update this to look for an icon or image attribute
                return super.getImage(element);
            }
        });

        IExtension input = null;
        IExtension[] extensions = registry.getExtensions("org.eclipse.e4.ui.workbench"); //$NON-NLS-1$
        for (int i = 0; i < extensions.length; i++) {
            if (extensions[i].getExtensionPointUniqueIdentifier().equals("org.eclipse.e4.services")) { //$NON-NLS-1$
                input = extensions[i];
                break;
            }
        }
        viewer.setInput(input);
        GridLayoutFactory.fillDefaults().generateLayout(parent);
    }
}