no.itpr.parser.handlers.TimeZoneTreeView.java Source code

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Here is the source code for no.itpr.parser.handlers.TimeZoneTreeView.java

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/*
 * Copyright (c) 2013, Alex Blewitt, Bandlem Ltd
 * Copyright (c) 2013, Packt Publishing Ltd
 *
 * 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
 */
package no.itpr.parser.handlers;

import java.net.URL;
import java.util.TimeZone;

import org.eclipse.jface.resource.FontRegistry;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.resource.LocalResourceManager;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
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.widgets.Composite;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.part.ViewPart;

import no.itpr.parser.handlers.internal.TimeZoneComparator;
import no.itpr.parser.handlers.internal.TimeZoneDialog;
import no.itpr.parser.handlers.internal.TimeZoneSelectionListener;
import no.itpr.parser.handlers.internal.TimeZoneViewerComparator;
import no.itpr.parser.handlers.internal.TimeZoneViewerFilter;

public class TimeZoneTreeView extends ViewPart {
    private TreeViewer treeViewer;
    private TimeZoneSelectionListener selectionListener;

    public void createPartControl(Composite parent) {
        ResourceManager rm = JFaceResources.getResources();
        LocalResourceManager lrm = new LocalResourceManager(rm, parent);
        ImageRegistry ir = new ImageRegistry(lrm);
        FontRegistry fr = JFaceResources.getFontRegistry();
        URL sample = getClass().getResource("/icons/sample.gif");
        ir.put("sample", ImageDescriptor.createFromURL(sample));
        treeViewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
        treeViewer.setLabelProvider(new DelegatingStyledCellLabelProvider(new TimeZoneLabelProvider(ir, fr)));
        treeViewer.setContentProvider(new TimeZoneContentProvider());
        treeViewer.setInput(new Object[] { TimeZoneComparator.getTimeZones() });
        treeViewer.setData("REVERSE", Boolean.TRUE);
        treeViewer.setFilters(new ViewerFilter[] { new TimeZoneViewerFilter("GMT") });
        treeViewer.setExpandPreCheckFilters(true);
        treeViewer.setComparator(new TimeZoneViewerComparator());
        treeViewer.addDoubleClickListener(new IDoubleClickListener() {
            public void doubleClick(DoubleClickEvent event) {
                Viewer viewer = event.getViewer();
                Shell shell = viewer.getControl().getShell();
                ISelection sel = viewer.getSelection();
                Object selectedValue;
                if (!(sel instanceof IStructuredSelection) || sel.isEmpty()) {
                    selectedValue = null;
                } else {
                    selectedValue = ((IStructuredSelection) sel).getFirstElement();
                }
                if (selectedValue instanceof TimeZone) {
                    TimeZone timeZone = (TimeZone) selectedValue;
                    new TimeZoneDialog(shell, timeZone).open();
                }
            }
        });
        getSite().setSelectionProvider(treeViewer);
        selectionListener = new TimeZoneSelectionListener(treeViewer, getSite().getPart());
        getSite().getWorkbenchWindow().getSelectionService().addSelectionListener(selectionListener);
    }

    public void setFocus() {
        treeViewer.getControl().setFocus();
    }

    @Override
    public void dispose() {
        if (selectionListener != null) {
            getSite().getWorkbenchWindow().getSelectionService().removeSelectionListener(selectionListener);
            selectionListener = null;
        }
        super.dispose();
    }
}