org.eclipse.emf.cdo.dawn.ui.composites.CDOResourceNodeSelectionWidget.java Source code

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Here is the source code for org.eclipse.emf.cdo.dawn.ui.composites.CDOResourceNodeSelectionWidget.java

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/*
 * Copyright (c) 2011, 2012 Eike Stepper (Berlin, Germany) 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:
 *    Martin Fluegge - initial API and implementation
 */
package org.eclipse.emf.cdo.dawn.ui.composites;

import org.eclipse.emf.cdo.dawn.ui.views.DawnWizardPageItemProvider;
import org.eclipse.emf.cdo.eresource.CDOResource;
import org.eclipse.emf.cdo.session.CDOSession;

import org.eclipse.net4j.util.container.IContainer;
import org.eclipse.net4j.util.container.IManagedContainer;
import org.eclipse.net4j.util.container.IPluginContainer;
import org.eclipse.net4j.util.ui.views.ContainerItemProvider;
import org.eclipse.net4j.util.ui.views.IElementFilter;

import org.eclipse.jface.viewers.DecoratingLabelProvider;
import org.eclipse.jface.viewers.IBaseLabelProvider;
import org.eclipse.jface.viewers.IContentProvider;
import org.eclipse.jface.viewers.ILabelDecorator;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.PlatformUI;

/**
 * @author Martin Fluegge
 * @since 1.0
 */
public class CDOResourceNodeSelectionWidget extends Composite {
    private ContainerItemProvider<IContainer<Object>> itemProvider;

    private ShowResourcesViewFilter viewFilter;

    private TreeViewer viewer;

    public CDOResourceNodeSelectionWidget(Composite parent, int style) {
        super(parent, style);
        GridLayout layout = new GridLayout();
        layout.numColumns = 1;
        layout.marginWidth = 0;
        setLayout(layout);
        init();
    }

    public void setShowResources(boolean showResources) {
        viewFilter.setShowResources(showResources);
    }

    protected void init() {
        viewer = new TreeViewer(this, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
        itemProvider = createContainerItemProvider();
        viewer.setContentProvider(createContentProvider());
        viewer.setLabelProvider(createLabelProvider());
        viewer.getTree().setLayoutData(new GridData(GridData.FILL_BOTH));
        viewer.setInput(getManagedContainer());

        viewFilter = new ShowResourcesViewFilter();
        viewer.addFilter(viewFilter);
    }

    public void addSelectionChangedListener(ISelectionChangedListener listener) {
        viewer.addSelectionChangedListener(listener);
    }

    public void removeSelectionChangedListener(ISelectionChangedListener listener) {
        viewer.removeSelectionChangedListener(listener);
    }

    protected IManagedContainer getManagedContainer() {
        return IPluginContainer.INSTANCE;
    }

    protected IContentProvider createContentProvider() {
        return itemProvider;
    }

    protected IBaseLabelProvider createLabelProvider() {
        ILabelDecorator labelDecorator = createLabelDecorator();
        return new DecoratingLabelProvider(itemProvider, labelDecorator);
    }

    protected ILabelDecorator createLabelDecorator() {
        return PlatformUI.getWorkbench().getDecoratorManager().getLabelDecorator();
    }

    protected ContainerItemProvider<IContainer<Object>> createContainerItemProvider() {
        return new DawnWizardPageItemProvider<IContainer<Object>>(new IElementFilter() {
            public boolean filter(Object element) {
                return element instanceof CDOSession;
            }
        });
    }

    /**
     * @author Martin Fluegge
     */
    protected class ShowResourcesViewFilter extends ViewerFilter {
        private boolean showResources;

        @Override
        public boolean select(Viewer viewer, Object parentElement, Object element) {
            if (element instanceof CDOResource) {
                return isShowResources();
            }

            return true;
        }

        public void setShowResources(boolean showResources) {
            this.showResources = showResources;
        }

        public boolean isShowResources() {
            return showResources;
        }
    }
}