org.eclipse.birt.report.designer.ui.dialogs.TreeValueDialog.java Source code

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Here is the source code for org.eclipse.birt.report.designer.ui.dialogs.TreeValueDialog.java

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/*******************************************************************************
 * Copyright (c) 2004 Actuate Corporation.
 * 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:
 *  Actuate Corporation  - initial API and implementation
 *******************************************************************************/

package org.eclipse.birt.report.designer.ui.dialogs;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.birt.report.designer.internal.ui.dialogs.BaseElementTreeSelectionDialog;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;

/**
 * TreeValueDialog
 */
public class TreeValueDialog extends BaseElementTreeSelectionDialog {

    List<ListenerClass> listeners = new ArrayList<ListenerClass>();

    private static class ListenerClass {

        int type;
        Listener listener;

        public ListenerClass(int type, Listener listener) {
            this.type = type;
            this.listener = listener;
        }
    }

    /**
     * @param parent
     * @param labelProvider
     * @param contentProvider
     */
    public TreeValueDialog(Shell parent, ILabelProvider labelProvider, ITreeContentProvider contentProvider) {
        super(parent, labelProvider, contentProvider);

        setAllowMultiple(false);
    }

    /**
     * Creates and initializes the tree viewer.
     * 
     * @param parent
     *            the parent composite
     * @return the tree viewer
     * @see #doCreateTreeViewer(Composite, int)
     */
    protected TreeViewer createTreeViewer(Composite parent) {
        TreeViewer treeViewer = super.createTreeViewer(parent);
        Tree tree = treeViewer.getTree();
        assert (tree != null);
        for (int i = 0; i < listeners.size(); i++) {
            int type = listeners.get(i).type;
            Listener listener = listeners.get(i).listener;
            tree.addListener(type, listener);
        }
        return treeViewer;
    }

    public void addListener(int type, Listener listner) {
        listeners.add(new ListenerClass(type, listner));
    }

    public boolean removeListener(int index) {
        if (index >= 0 && index < listeners.size()) {
            listeners.remove(index);
            return true;
        } else {
            return false;
        }
    }

    public boolean removeAllListeners() {
        listeners.clear();
        return true;
    }
}