org.ngrinder.recorder.ui.AboutDialog.java Source code

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Here is the source code for org.ngrinder.recorder.ui.AboutDialog.java

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/* 
 * Licensed 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.ngrinder.recorder.ui;

import static net.grinder.util.NoOp.noOp;

import java.awt.Component;
import java.awt.Font;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.io.IOException;
import java.io.InputStream;
import java.util.Calendar;

import javax.swing.AbstractAction;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRootPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;
import javax.swing.border.EmptyBorder;

import org.apache.commons.io.IOUtils;
import org.ngrinder.recorder.infra.RecorderConfig;
import org.ngrinder.recorder.util.ResourceUtil;

/**
 * nGrinder recorder "about" dialog class.
 * 
 * @author AlexQin
 * @version 1.0
 */
public final class AboutDialog extends JDialog {

    private static final long serialVersionUID = -2225460316898229436L;
    private static AboutDialog aboutDialog = null;
    private final RecorderConfig recordConfig;

    /**
     * Get instance of AboutDialog class.
     * 
     * @param owner
     *            owner frame
     * @param recordConfig
     *            recordConfig
     * @return AboutDialog instance
     */
    public static AboutDialog getInstance(Frame owner, RecorderConfig recordConfig) {
        if (aboutDialog == null) {
            aboutDialog = new AboutDialog(owner, recordConfig);
        }

        return aboutDialog;
    }

    /**
     * Constructor.
     * 
     * @param owner
     *            owner frame
     * @param recordConfig
     *            recordConfig
     */
    private AboutDialog(Frame owner, RecorderConfig recordConfig) {
        super(owner, "About nGrinder Recorder", true);
        this.recordConfig = recordConfig;
        setName("aboutDialog");
        initUI();
        initKeyStroke();
        setResizable(false);
        pack();
        this.setSize(400, getHeight());
        setLocationRelativeTo(owner);
        setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
    }

    /**
     * Initialize UI.
     */
    protected void initUI() {
        JPanel jContentPane = new JPanel();
        jContentPane.setBorder(new EmptyBorder(10, 10, 10, 10));
        jContentPane.setLayout(new BoxLayout(jContentPane, BoxLayout.Y_AXIS));

        jContentPane.add(getIcon());
        jContentPane.add(Box.createVerticalStrut(16));
        jContentPane.add(getAppName());
        jContentPane.add(Box.createVerticalStrut(8));
        jContentPane.add(getVersion());
        jContentPane.add(Box.createVerticalStrut(8));
        jContentPane.add(getCompany());
        jContentPane.add(getRights());
        jContentPane.add(Box.createVerticalStrut(8));
        jContentPane.add(getLicenseTextArea());
        setContentPane(jContentPane);
    }

    private Component getLicenseTextArea() {
        JTextArea licenseTextArea = new JTextArea();
        JScrollPane scrollPane = new JScrollPane(licenseTextArea);
        InputStream resourceAsStream = AboutDialog.class.getResourceAsStream("/license.txt");
        String licenseMessage;
        try {
            licenseMessage = IOUtils.toString(resourceAsStream);
            IOUtils.closeQuietly(resourceAsStream);
            licenseTextArea.setText(licenseMessage);
        } catch (IOException e) {
            noOp();
        }
        return scrollPane;
    }

    private void initKeyStroke() {
        addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ESCAPE) {
                    dispose();
                }
            }
        });

        JRootPane rootPane = getRootPane();
        rootPane.getActionMap().put("ESCAPE", new AbstractAction() {
            private static final long serialVersionUID = 421791976774749694L;

            public void actionPerformed(ActionEvent e) {
                dispose();
            }
        });

        KeyStroke keyStroke = KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0, false);
        rootPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(keyStroke, "ESCAPE");
    }

    private JLabel getIcon() {
        JLabel icon = new JLabel();
        icon.setIcon(ResourceUtil.getIcon("recorder32x32.png"));
        icon.setAlignmentX(CENTER_ALIGNMENT);

        return icon;
    }

    private JLabel getAppName() {
        JLabel appName = new JLabel("nGrinder Recorder");
        appName.setAlignmentX(CENTER_ALIGNMENT);
        appName.setFont(appName.getFont().deriveFont(Font.BOLD, 12.0f));

        return appName;
    }

    private JLabel getVersion() {
        JLabel version = new JLabel(
                "Version: " + recordConfig.getInternalProperty("ngrinder.recorder.version", "1.0"));
        version.setAlignmentX(CENTER_ALIGNMENT);
        return version;
    }

    private JLabel getCompany() {
        JLabel company = new JLabel(
                "\u00A9 " + Calendar.getInstance().get(Calendar.YEAR) + " nGrinder Dev Community.");
        company.setAlignmentX(CENTER_ALIGNMENT);

        return company;
    }

    private JLabel getRights() {
        JLabel rights = new JLabel("All rights reserved.");
        rights.setAlignmentX(CENTER_ALIGNMENT);

        return rights;
    }
}