JMeter example source code file (AboutCommand.java)

This example JMeter source code file (AboutCommand.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - JMeter tags/keywords

all, apache, apache, awt, border, command, dimension, dimension, event, gui, hashset, jdialog, jlabel, jlabel, jmeter, jpanel, set, set, swing, util

The JMeter AboutCommand.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.apache.jmeter.gui.action;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

import org.apache.jmeter.gui.GuiPackage;
import org.apache.jmeter.util.JMeterUtils;

/**
 * About Command. It may be extended in the future to add a list of installed
 * protocols, config options, etc.
 *
 */
public class AboutCommand implements Command {
    private static final Set<String> commandSet;

    private static JDialog about;

    static {
        HashSet<String> commands = new HashSet();
        commands.add(ActionNames.ABOUT);
        commandSet = Collections.unmodifiableSet(commands);
    }

    /**
     * Handle the "about" action by displaying the "About Apache JMeter..."
     * dialog box. The Dialog Box is NOT modal, because those should be avoided
     * if at all possible.
     */
    public void doAction(ActionEvent e) {
        if (e.getActionCommand().equals(ActionNames.ABOUT)) {
            this.about();
        }
    }

    /**
     * Provide the list of Action names that are available in this command.
     */
    public Set<String> getActionNames() {
        return AboutCommand.commandSet;
    }

    /**
     * Called by about button. Raises about dialog. Currently the about box has
     * the product image and the copyright notice. The dialog box is centered
     * over the MainFrame.
     */
    void about() {
        JFrame mainFrame = GuiPackage.getInstance().getMainFrame();
        if (about == null) {
            about = new JDialog(mainFrame, "About Apache JMeter...", false);
            about.addMouseListener(new MouseAdapter() {
                @Override
                public void mouseClicked(MouseEvent e) {
                    about.setVisible(false);
                }
            });

            JLabel jmeter = new JLabel(JMeterUtils.getImage("jmeter.jpg"));
            JLabel copyright = new JLabel(JMeterUtils.getJMeterCopyright(), JLabel.CENTER);
            JLabel rights = new JLabel("All Rights Reserved.", JLabel.CENTER);
            JLabel version = new JLabel("Apache JMeter Version " + JMeterUtils.getJMeterVersion(), JLabel.CENTER);
            JPanel infos = new JPanel();
            infos.setOpaque(false);
            infos.setLayout(new GridLayout(0, 1));
            infos.setBorder(new EmptyBorder(5, 5, 5, 5));
            infos.add(copyright);
            infos.add(rights);
            infos.add(version);
            Container panel = about.getContentPane();
            panel.setLayout(new BorderLayout());
            panel.setBackground(Color.white);
            panel.add(jmeter, BorderLayout.NORTH);
            panel.add(infos, BorderLayout.SOUTH);
        }

        // NOTE: these lines center the about dialog in the
        // current window. Some older Swing versions have
        // a bug in getLocationOnScreen() and they may not
        // make this behave properly.
        Point p = mainFrame.getLocationOnScreen();
        Dimension d1 = mainFrame.getSize();
        Dimension d2 = about.getSize();
        about.setLocation(p.x + (d1.width - d2.width) / 2, p.y + (d1.height - d2.height) / 2);
        about.pack();
        about.setVisible(true);
    }
}