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 ImageIcon DEFAULT_FRAME_ICON = new ImageIcon(IMAGE_DIR+"default.gif");
  private static int BORDER_THICKNESS = 4;
  private static int WIDTH = 200;
  private static int HEIGHT = 200;
  private static int TITLE_BAR_HEIGHT = 25;
  private static int FRAME_ICON_PADDING = 2;
  private static int ICONIZED_WIDTH = 150;
  private static Color TITLE_BAR_BG_COLOR = new Color(108,190,116);
  private static Color BORDER_COLOR = new Color(8,90,16);

  private int m_titleBarHeight = TITLE_BAR_HEIGHT;
  private int m_width = WIDTH;
  private int m_height = HEIGHT;
  private int m_iconizedWidth = ICONIZED_WIDTH;

  private String m_title;
  private JLabel m_titleLabel;
  private JLabel m_iconLabel;

  private boolean m_iconified;

  private boolean m_iconizeable;
  private boolean m_resizeable;
  private boolean m_closeable;

  // used to wrap title bar and contentPanel
  private JPanel m_frameContentPanel;

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

  private InnerFrameButton m_iconize;
  private InnerFrameButton m_close;

  private ImageIcon m_frameIcon = DEFAULT_FRAME_ICON;

  private NorthResizeEdge m_northResizer;
  private SouthResizeEdge m_southResizer;
  private EastResizeEdge m_eastResizer;
  private WestResizeEdge m_westResizer;

  public InnerFrame() {
    this("");
  }

  public InnerFrame(String title) {
    this(title, null);
  }

  public InnerFrame(String title, ImageIcon frameIcon) {
    this(title, frameIcon, true, true, true);
  }

  public InnerFrame(String title, ImageIcon frameIcon,
   boolean resizeable, boolean iconizeable, boolean closeable) {
    super.setLayout(new BorderLayout());
    attachNorthResizeEdge();
    attachSouthResizeEdge();
    attachEastResizeEdge();
    attachWestResizeEdge();
    populateInnerFrame();

    setTitle(title);
    setResizeable(resizeable);
    setIconizeable(iconizeable);
    setCloseable(closeable);
    if (frameIcon != null)
      setFrameIcon(frameIcon);
  }

  protected void populateInnerFrame() {
    m_frameContentPanel = new JPanel();
    m_frameContentPanel.setLayout(new BorderLayout());
    createTitleBar();
    m_contentPanel = new JPanel();
    m_frameContentPanel.add(m_titlePanel, BorderLayout.NORTH);
    m_frameContentPanel.add(m_contentPanel, BorderLayout.CENTER);
    super.add(m_frameContentPanel, BorderLayout.CENTER);
  }

  public Component add(Component c) {
    return((m_contentPanel == null) ? null : m_contentPanel.add(c));
  }

  public void setLayout(LayoutManager mgr) {
    if (m_contentPanel != null)
      m_contentPanel.setLayout(mgr);
  }

  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 boolean isIconizeable() {
    return m_iconizeable;
  }

  public void setIconizeable(boolean b) {
    m_iconizeable = b;
    m_iconize.setVisible(b);
    m_titlePanel.revalidate();
  }

  public boolean isCloseable() {
    return m_closeable;
  }

  public void setCloseable(boolean b) {
    m_closeable = b;
    m_close.setVisible(b);
    m_titlePanel.revalidate();
  }

  public boolean isIconified() {
    return m_iconified;
  }

  public void setIconified(boolean b) {
    m_iconified = b;
    if (b) {
      m_width = getWidth();     // remember width
      m_height = getHeight();   // remember height
      setBounds(getX(), getY(), ICONIZED_WIDTH, 
        m_titleBarHeight + 2*BORDER_THICKNESS);
      m_iconize.setIcon(RESTORE_BUTTON_ICON);
      m_iconize.setPressedIcon(PRESS_RESTORE_BUTTON_ICON);
      setResizeable(false);
    }
    else {
      setBounds(getX(), getY(), m_width, m_height);
      m_iconize.setIcon(ICONIZE_BUTTON_ICON);
      m_iconize.setPressedIcon(PRESS_ICONIZE_BUTTON_ICON);
      setResizeable(true);
    }
    revalidate();
  }

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

  public void setFrameIcon(ImageIcon fi) {
    m_frameIcon = fi;

    if (fi != null) {
      if (m_frameIcon.getIconHeight() > TITLE_BAR_HEIGHT)
        setTitleBarHeight(m_frameIcon.getIconHeight() + 2*FRAME_ICON_PADDING);
      m_iconLabel.setIcon(m_frameIcon);
    }
    else setTitleBarHeight(TITLE_BAR_HEIGHT);
    revalidate();
  }
 
  public ImageIcon getFrameIcon() {
    return m_frameIcon;
  }

  public void setTitle(String s) {
    m_title = s;
    m_titleLabel.setText(s);
    m_titlePanel.repaint();
  }

  public String getTitle() {
    return m_title;
  }

  public void setTitleBarHeight(int h) {
    m_titleBarHeight = h;
  }

  public int getTitleBarHeight() {
    return m_titleBarHeight;
  }
 
  // create the title bar: m_titlePanel
  protected void createTitleBar() {
    m_titlePanel = new JPanel() {
      public Dimension getPreferredSize() {
        return new Dimension(InnerFrame.this.getWidth(), 
          m_titleBarHeight);
      }
    };
    m_titlePanel.setLayout(new BorderLayout());
    m_titlePanel.setOpaque(true);
    m_titlePanel.setBackground(TITLE_BAR_BG_COLOR);

    m_titleLabel = new JLabel();
    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_iconLabel = new JLabel();
    m_iconLabel.setBorder(new EmptyBorder(
      FRAME_ICON_PADDING, FRAME_ICON_PADDING,
      FRAME_ICON_PADDING, FRAME_ICON_PADDING));
    if (m_frameIcon != null)
      m_iconLabel.setIcon(m_frameIcon);

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

    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;
    }
  }

  ///////////////////////////////////////////////
  //////////////// Resizability /////////////////
  ///////////////////////////////////////////////

  public boolean isResizeable() {
    return m_resizeable;
  }

  public void setResizeable(boolean b) {
    if (!b && m_resizeable == true) {
      m_northResizer.removeMouseListener(m_northResizer);
      m_northResizer.removeMouseMotionListener(m_northResizer);
      m_southResizer.removeMouseListener(m_southResizer);
      m_southResizer.removeMouseMotionListener(m_southResizer);
      m_eastResizer.removeMouseListener(m_eastResizer);
      m_eastResizer.removeMouseMotionListener(m_eastResizer);
      m_westResizer.removeMouseListener(m_westResizer);
      m_westResizer.removeMouseMotionListener(m_westResizer);
    }
    else if (m_resizeable == false) {
      m_northResizer.addMouseListener(m_northResizer);
      m_northResizer.addMouseMotionListener(m_northResizer);
      m_southResizer.addMouseListener(m_southResizer);
      m_southResizer.addMouseMotionListener(m_southResizer);
      m_eastResizer.addMouseListener(m_eastResizer);
      m_eastResizer.addMouseMotionListener(m_eastResizer);
      m_westResizer.addMouseListener(m_westResizer);
      m_westResizer.addMouseMotionListener(m_westResizer);
    }
    m_resizeable = b;
  }

  protected void attachNorthResizeEdge() {
    m_northResizer = new NorthResizeEdge(this);
    super.add(m_northResizer, BorderLayout.NORTH);
  }

  protected void attachSouthResizeEdge() {
    m_southResizer = new SouthResizeEdge(this);
    super.add(m_southResizer, BorderLayout.SOUTH);
  }

  protected void attachEastResizeEdge() {
    m_eastResizer = new EastResizeEdge(this);
    super.add(m_eastResizer, BorderLayout.EAST);
  }

  protected void attachWestResizeEdge() {
    m_westResizer = new WestResizeEdge(this);
    super.add(m_westResizer, BorderLayout.WEST);
  }

  class EastResizeEdge extends JPanel
  implements MouseListener, MouseMotionListener {
    private int WIDTH = BORDER_THICKNESS;