innerframe.java

Manning - Java Swing 2nd Edition (2003) swing2e源代码

/** 
 *  Copyright 1999-2002 Matthew Robinson and Pavel Vorobiev. 
 *  All Rights Reserved. 
 * 
 *  =================================================== 
 *  This program contains code from the book "Swing" 
 *  2nd Edition by Matthew Robinson and Pavel Vorobiev 
 *  http://www.spindoczine.com/sbe 
 *  =================================================== 
 * 
 *  The above paragraph must be included in full, unmodified 
 *  and completely intact in the beginning of any source code 
 *  file that references, copies or uses (in any way, shape 
 *  or form) code contained in this file. 
 */ 

package mdi;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.EmptyBorder;

public class InnerFrame 
extends JPanel
{
  private static String IMAGE_DIR = "mdi" + java.io.File.separator;
  private static ImageIcon ICONIZE_BUTTON_ICON = new ImageIcon(IMAGE_DIR+"iconize.gif");
  private static ImageIcon RESTORE_BUTTON_ICON = new ImageIcon(IMAGE_DIR+"restore.gif");
  private static ImageIcon CLOSE_BUTTON_ICON = new ImageIcon(IMAGE_DIR+"close.gif");
  private static ImageIcon PRESS_CLOSE_BUTTON_ICON = new ImageIcon(IMAGE_DIR+"pressclose.gif");
  private static ImageIcon PRESS_RESTORE_BUTTON_ICON = new ImageIcon(IMAGE_DIR+"pressrestore.gif");
  private static ImageIcon PRESS_ICONIZE_BUTTON_ICON = new ImageIcon(IMAGE_DIR+"pressiconize.gif");
  private static final int WIDTH = 200;
  private static final int HEIGHT = 200;
  private static final int TITLE_BAR_HEIGHT = 25;
  private static Color TITLE_BAR_BG_COLOR = new Color(108,190,116);

  private String m_title;
  private JLabel m_titleLabel;

  private boolean m_iconified;

  private JPanel m_titlePanel; 
  private JPanel m_contentPanel;
  private JPanel m_buttonPanel; 
  private JPanel m_buttonWrapperPanel;

  private InnerFrameButton m_iconize;
  private InnerFrameButton m_close;

  public InnerFrame(String title) { 
    m_title = title;
    setLayout(new BorderLayout());
    createTitleBar();
    m_contentPanel = new JPanel();
    add(m_titlePanel, BorderLayout.NORTH);
    add(m_contentPanel, BorderLayout.CENTER);
  }

  public void toFront() {
    if (getParent() instanceof JLayeredPane)
      ((JLayeredPane) getParent()).moveToFront(this);
  }

  public void close() {
    if (getParent() instanceof JLayeredPane) {
      JLayeredPane jlp = (JLayeredPane) getParent();
      jlp.remove(InnerFrame.this);
      jlp.repaint();
    }
  }

  public void setIconified(boolean b) {
    m_iconified = b;
    if (b) {
      setBounds(getX(), getY(), WIDTH, TITLE_BAR_HEIGHT);
      m_iconize.setIcon(RESTORE_BUTTON_ICON);
      m_iconize.setPressedIcon(PRESS_RESTORE_BUTTON_ICON);
    }
    else {
      setBounds(getX(), getY(), WIDTH, HEIGHT);
      m_iconize.setIcon(ICONIZE_BUTTON_ICON);
      m_iconize.setPressedIcon(PRESS_ICONIZE_BUTTON_ICON);
      revalidate();
    }
  }

  public boolean isIconified() {
    return m_iconified;
  }

  ////////////////////////////////////////////
  //////////////// Title Bar /////////////////
  ////////////////////////////////////////////

  // create the title bar m_titlePanel
  public void createTitleBar() {
    m_titlePanel = new JPanel() {
      public Dimension getPreferredSize() {
        return new Dimension(InnerFrame.WIDTH, 
          InnerFrame.TITLE_BAR_HEIGHT);
      }
    };
    m_titlePanel.setLayout(new BorderLayout());
    m_titlePanel.setOpaque(true);
    m_titlePanel.setBackground(TITLE_BAR_BG_COLOR);

    m_titleLabel = new JLabel(m_title);
    m_titleLabel.setForeground(Color.black);

    m_close = new InnerFrameButton(CLOSE_BUTTON_ICON);
    m_close.setPressedIcon(PRESS_CLOSE_BUTTON_ICON);
    m_close.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        InnerFrame.this.close();
      }
    });

    m_iconize = new InnerFrameButton(ICONIZE_BUTTON_ICON);
    m_iconize.setPressedIcon(PRESS_ICONIZE_BUTTON_ICON);
    m_iconize.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        InnerFrame.this.setIconified(!InnerFrame.this.isIconified());
      }
    });
    
    m_buttonWrapperPanel = new JPanel();
    m_buttonWrapperPanel.setOpaque(false);
    m_buttonPanel = new JPanel(new GridLayout(1,2));
    m_buttonPanel.setOpaque(false);
    m_buttonPanel.add(m_iconize);
    m_buttonPanel.add(m_close);
    m_buttonPanel.setAlignmentX(0.5f);
    m_buttonPanel.setAlignmentY(0.5f);
    m_buttonWrapperPanel.add(m_buttonPanel);

    m_titlePanel.add(m_titleLabel, BorderLayout.CENTER);
    m_titlePanel.add(m_buttonWrapperPanel, BorderLayout.EAST);

    InnerFrameTitleBarMouseAdapter iftbma = 
      new InnerFrameTitleBarMouseAdapter(this);
    m_titlePanel.addMouseListener(iftbma);
    m_titlePanel.addMouseMotionListener(iftbma);
  }

  // title bar mouse adapter for frame dragging
  class InnerFrameTitleBarMouseAdapter 
  extends MouseInputAdapter
  {
    InnerFrame m_if;
    int m_XDifference, m_YDifference;
    boolean m_dragging;

    public InnerFrameTitleBarMouseAdapter(InnerFrame inf) {
      m_if = inf;
    }

    public void mouseDragged(MouseEvent e) {
      if (m_dragging)
        m_if.setLocation(e.getX()-m_XDifference + getX(), 
          e.getY()-m_YDifference + getY());
    }

    public void mousePressed(MouseEvent e) {	
      m_if.toFront();
      m_XDifference = e.getX();
      m_YDifference = e.getY();
      m_dragging = true;
    }

    public void mouseReleased(MouseEvent e) {
      m_dragging = false;
    }
  }
  
  // custom button class for title bar
  class InnerFrameButton extends JButton 
  {
    Dimension m_dim;

    public InnerFrameButton(ImageIcon ii) {
      super(ii);
      m_dim = new Dimension(ii.getIconWidth(), ii.getIconHeight());
      setOpaque(false);
      setContentAreaFilled(false);
      setBorder(null);
    }

    public Dimension getPreferredSize() {
      return m_dim;
    }

    public Dimension getMinimumSize() {
      return m_dim;
    }

    public Dimension getMaximumSize() {
      return m_dim;
    }
  }
}