aboutdialog.java

tiled地图编辑器是2d的,很不错的国外软件,使用起来很方便的

/*
 *  Tiled Map Editor, (c) 2004-2006
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  Adam Turk <[e-mail]>
 *  Bjorn Lindeijer <[e-mail]>
 */

package tiled.mapeditor.dialogs;

import java.awt.Component;
import java.awt.Dimension;
import java.awt.Color;
import java.awt.event.MouseEvent;
import java.awt.event.ActionEvent;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.*;
import javax.swing.event.MouseInputAdapter;

import tiled.mapeditor.MapEditor;
import tiled.mapeditor.Resources;

/**
 * The about dialog.
 *
 * @version $Id: AboutDialog.java 683 2006-06-25 14:17:37Z bjorn $
 */
public class AboutDialog extends JDialog
{
    private final JFrame parent;
    private JProgressBar memoryBar;

    public AboutDialog(JFrame parent) {
        super(parent, Resources.getString("dialog.main.title") + " v" + MapEditor.version);

        this.parent = parent;

        Timer timer = new Timer(true);
        timer.scheduleAtFixedRate(new UpdateTimerTask(), 0, 1000);

        setContentPane(createMainPanel());
        setResizable(false);
        setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
        pack();
    }

    private JPanel createMainPanel() {
        JLabel logo = new JLabel(Resources.getIcon("logo.png"));
        logo.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
        logo.setAlignmentX(Component.LEFT_ALIGNMENT);
        logo.addMouseListener(new MouseInputAdapter() {
            public void mouseClicked(MouseEvent mouseEvent) {
                setVisible(false);
            }
        });

        JSeparator separator = new JSeparator();
        separator.setAlignmentX(Component.LEFT_ALIGNMENT);

        memoryBar = new JProgressBar();
        memoryBar.setStringPainted(true);

        JButton gcButton = new JButton(new GarbageCollectAction());
        gcButton.setBorderPainted(false);
        gcButton.setBorder(null);
        gcButton.setOpaque(false);
        gcButton.setBackground(new Color(0, 0, 0, 0));

        JPanel barPanel = new JPanel();
        barPanel.setLayout(new BoxLayout(barPanel, BoxLayout.X_AXIS));
        barPanel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
        barPanel.setMaximumSize(new Dimension(logo.getPreferredSize().width,
                                              Short.MAX_VALUE));
        barPanel.setAlignmentX(Component.LEFT_ALIGNMENT);
        barPanel.add(memoryBar);
        barPanel.add(Box.createRigidArea(new Dimension(5, 5)));
        barPanel.add(gcButton);

        JPanel mainPanel = new JPanel();
        mainPanel.setOpaque(false);
        mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
        mainPanel.add(logo);
        mainPanel.add(separator);
        mainPanel.add(barPanel);
        return mainPanel;
    }

    private void updateMemoryBar() {
        int total = (int) Runtime.getRuntime().totalMemory();
        int used = (int) (total - Runtime.getRuntime().freeMemory());
        memoryBar.setMaximum(total);
        memoryBar.setValue(used);
        memoryBar.setString(used / 1024 + " KB / " + total / 1024 + " KB");
    }

    public void setVisible(boolean visible) {
        if (visible) {
            updateMemoryBar();
            setLocationRelativeTo(parent);
        }
        super.setVisible(visible);
    }

    /**
     * Used for updating the memory bar in intervals.
     */
    private class UpdateTimerTask extends TimerTask
    {
        public void run() {
            if (isVisible()) {
                SwingUtilities.invokeLater(new Runnable() {
                    public void run() {
                        updateMemoryBar();
                    }
                });
            }
        }
    }

    /**
     * Collects garbage.
     */
    private class GarbageCollectAction extends AbstractAction
    {
        public GarbageCollectAction() {
            putValue(Action.SMALL_ICON, Resources.getIcon("gnome-delete.png"));
        }

        public void actionPerformed(ActionEvent actionEvent) {
            System.gc();
            updateMemoryBar();
        }
    }
}