RCP tree Menu

/*******************************************************************************
 * 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.swt.snippets;

/*
 * Tree example snippet: show a menu in a tree header
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.5
 */

import org.eclipse.swt.*;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet312 {

    static String[][] files = {
            { "ver.txt", "1 KB", "Text Document", "28/09/2005 9:57 AM",
                    "admin", },
            { "Thumbs.db", "76 KB", "Data Base file", "13/03/2006 3:56 PM",
                    "john", },
            { "daddy.bmp", "148 MB", "Bitmap", "27/10/2008 1:34 PM", "bill", },
            { "io.sys", "48 KB", "File System", "16/12/2008 6:14 AM", "admin", },
            { "Programs", "0 KB", "File Folder", "04/02/2009 12:18 PM", "anne", },
            { "test.rnd", "55 MB", "RND File", "19/02/2009 5:49 PM", "john", },
            { "arial.ttf", "94 KB", "True Type Font", "25/08/2008 1:25 PM",
                    "john", }, };

    static void createMenuItem(Menu parent, final TreeColumn column) {
        final MenuItem itemName = new MenuItem(parent, SWT.CHECK);
        itemName.setText(column.getText());
        itemName.setSelection(column.getResizable());
        itemName.addListener(SWT.Selection, new Listener() {
            @Override
            public void handleEvent(Event event) {
                if (itemName.getSelection()) {
                    column.setWidth(150);
                    column.setResizable(true);
                } else {
                    column.setWidth(0);
                    column.setResizable(false);
                }
            }
        });
    }

    static void createMenuItem(Menu parent, final Tree tree1) {
        final MenuItem itemName = new MenuItem(parent, SWT.CHECK);

    }

    public static void tree1MouseDown(MouseEvent e, final Tree tree1, Shell shell) {
        TreeItem selected = tree1.getItem(new Point(e.x, e.y)); // 取节点控件
        if (selected != null && e.button == 3) // 如果取到节点控件，且是鼠标右键
        {
            Menu menu = new Menu(shell, SWT.POP_UP); // 为节点建POP UP菜单
            if (selected.getParentItem() != null) // 如果不是根节点
            {

            } else { // 如果，是根节点，即selected.getParentItem()==null为真。
                System.out.println("@@@@$#");
                MenuItem mi4 = new MenuItem(menu, SWT.PUSH); // 为菜单，建菜单项
                mi4.setText("向[" + selected.getText() + "]节点，发送即时消息！");
                mi4.setData(selected.getText()); // 向响应菜单项事件的代码，传递值。
                mi4.addListener(SWT.Selection, new Listener() {
                    public void handleEvent(Event e) { // 向指定用户发送消息!
                        MenuItem mi = (MenuItem) e.widget; // 取菜单项Widget
                        String selected = (String) mi.getData(); // 取，在建立菜单项时，传过来的对象。
                        if (selected != null) { // 添加，响应代码
                            System.out.println("aaa");
                            tree1.setMenu(null); // 取消弹出菜单
                        }
                    }
                });
                tree1.setMenu(menu); // 设置弹出菜单
            }

        } else if (e.button == 3) // 选中的是树形控件的空白区
        {
            // 响应代码段，略
            tree1.setMenu(null); // 取消弹出菜单
        }
    }

    public static void main(String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setLayout(new FillLayout());

        final Tree tree = new Tree(shell, SWT.V_SCROLL | SWT.H_SCROLL
                | SWT.BORDER);
        tree.setHeaderVisible(true);
        tree.addMouseListener(new MouseListener() {

            @Override
            public void mouseUp(MouseEvent e) {
            }

            @Override
            public void mouseDown(MouseEvent e) {
                tree1MouseDown(e, tree, shell);
            }

            @Override
            public void mouseDoubleClick(MouseEvent e) {

            }
        });
        final Menu headerMenu = new Menu(shell, SWT.POP_UP);
        final TreeColumn columnName = new TreeColumn(tree, SWT.NONE);
        columnName.setText("Name");
        columnName.setWidth(150);
        createMenuItem(headerMenu, columnName);
        final TreeColumn columnSize = new TreeColumn(tree, SWT.NONE);
        columnSize.setText("Size");
        columnSize.setWidth(150);
        createMenuItem(headerMenu, columnSize);
        /*
         * final TreeColumn columnType = new TreeColumn(tree, SWT.NONE);
         * columnType.setText("Type"); columnType.setWidth(150);
         * createMenuItem(headerMenu, columnType); final TreeColumn columnDate =
         * new TreeColumn(tree, SWT.NONE); columnDate.setText("Date");
         * columnDate.setWidth(150); createMenuItem(headerMenu, columnDate);
         * final TreeColumn columnOwner = new TreeColumn(tree, SWT.NONE);
         * columnOwner.setText("Owner"); columnOwner.setWidth(0);
         * columnOwner.setResizable(false); createMenuItem(headerMenu,
         * columnOwner);
         */

        for (int i = 0; i < files.length; i++) {
            TreeItem item = new TreeItem(tree, SWT.NONE);
            item.setText(files[i]);
            TreeItem subItem = new TreeItem(item, SWT.NONE);
            subItem.setText("node"+i);
        }

        /*final Menu treeMenu = new Menu(shell, SWT.POP_UP);
        MenuItem item = new MenuItem(treeMenu, SWT.PUSH);
        item.setText("Open");
        item = new MenuItem(treeMenu, SWT.PUSH);
        item.setText("Open With");

        new MenuItem(treeMenu, SWT.SEPARATOR);// 分隔符

        item = new MenuItem(treeMenu, SWT.PUSH);
        item.setText("Cut");
        item = new MenuItem(treeMenu, SWT.PUSH);
        item.setText("Copy");
        item = new MenuItem(treeMenu, SWT.PUSH);
        item.setText("Paste");

        new MenuItem(treeMenu, SWT.SEPARATOR);// 分隔符
        item = new MenuItem(treeMenu, SWT.PUSH);
        item.setText("Delete");

        tree.addListener(SWT.MenuDetect, new Listener() {
            @Override
            public void handleEvent(Event event) {
                Point pt = display.map(null, tree, new Point(event.x, event.y));
                Rectangle clientArea = tree.getClientArea();
                boolean header = clientArea.y <= pt.y
                        && pt.y < (clientArea.y + tree.getHeaderHeight());
                tree.setMenu(header ? headerMenu : treeMenu);
            }
        });*/

        /*
         * IMPORTANT: Dispose the menus (only the current menu, set with
         * setMenu(), will be automatically disposed)
         */
    /*    tree.addListener(SWT.Dispose, new Listener() {
            @Override
            public void handleEvent(Event event) {
                headerMenu.dispose();
                treeMenu.dispose();
            }
        });*/

        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
        display.dispose();
    }
}