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 implements RootPaneContainer
{
  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 MAXIMIZE_BUTTON_ICON = new ImageIcon(IMAGE_DIR+"maximize.gif");
  private static ImageIcon MINIMIZE_BUTTON_ICON = new ImageIcon(IMAGE_DIR+"minimize.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 PRESS_MAXIMIZE_BUTTON_ICON = new ImageIcon(IMAGE_DIR+"pressmaximize.gif");
  private static ImageIcon PRESS_MINIMIZE_BUTTON_ICON = new ImageIcon(IMAGE_DIR+"pressminimize.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 int m_x;
  private int m_y;

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

  private boolean m_iconified;
  private boolean m_maximized;

  private boolean m_iconizeable;
  private boolean m_resizeable;
  private boolean m_closeable;
  private boolean m_maximizeable;
 
  // only false when maximized
  private boolean m_draggable = true;

  private JRootPane m_rootPane;

  // used to wrap m_titlePanel and m_rootPane
  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 InnerFrameButton m_maximize;

  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, true);
  }

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

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

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

  protected void setupCapturePanel() {
    CapturePanel mouseTrap = new CapturePanel();
    m_rootPane.getLayeredPane().add(mouseTrap, 
      new Integer(Integer.MIN_VALUE));
    mouseTrap.setBounds(0,0,10000,10000);
  } 

  // don't allow this in root pane containers 
  public Component add(Component c) {
    return null;
  }

  // don't allow this in root pane containers 
  public void setLayout(LayoutManager mgr) {
  }

  public JMenuBar getJMenuBar() {
    return m_rootPane.getJMenuBar();
  }

  public JRootPane getRootPane() {
    return m_rootPane;
  }

  public Container getContentPane() {
    return m_rootPane.getContentPane();
  }

  public Component getGlassPane() {
    return m_rootPane.getGlassPane();
  }

  public JLayeredPane getLayeredPane() {
    return m_rootPane.getLayeredPane();
  }

  public void setJMenuBar(JMenuBar menu) {
    m_rootPane.setJMenuBar(menu);
  }

  public void setContentPane(Container content) {
    m_rootPane.setContentPane(content);
  }

  public void setGlassPane(Component glass) {
    m_rootPane.setGlassPane(glass);
  }

  public void setLayeredPane(JLayeredPane layered) {
    m_rootPane.setLayeredPane(layered);
  }

  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 isMaximizeable() {
    return m_maximizeable;
  }

  public void setMaximizeable(boolean b) {
    m_maximizeable = b;
    m_maximize.setVisible(b);
    m_titlePanel.revalidate();
  }

  public boolean isIconified() {
    return m_iconified;
  }

  public void setIconified(boolean b) {
    m_iconified = b;
    if (b) {
      if (isMaximized())
        setMaximized(false);
      toFront();
      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 {
      toFront();
      setBounds(getX(), getY(), m_width, m_height);
      m_iconize.setIcon(ICONIZE_BUTTON_ICON);
      m_iconize.setPressedIcon(PRESS_ICONIZE_BUTTON_ICON);
      setResizeable(true);
    }
    revalidate();
  }

  public boolean isMaximized() {
    return m_maximized;
  }

  public void setMaximized(boolean b) {
    m_maximized = b;
    if (b)
    {
      if (isIconified())
        setIconified(false);
      toFront();
      m_width = getWidth();     // remember width
      m_height = getHeight();   // remember height
      m_x = getX();             // remember x
      m_y = getY();             // remember y
      setBounds(0, 0, getParent().getWidth(), getParent().getHeight());
      m_maximize.setIcon(MINIMIZE_BUTTON_ICON);
      m_maximize.setPressedIcon(PRESS_MINIMIZE_BUTTON_ICON);
      setResizeable(false);
      setDraggable(false);
    }
    else {
      toFront();
      setBounds(m_x, m_y, m_width, m_height);
      m_maximize.setIcon(MAXIMIZE_BUTTON_ICON);
      m_maximize.setPressedIcon(PRESS_MAXIMIZE_BUTTON_ICON);
      setResizeable(true);
      setDraggable(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;
  }

  public boolean isDraggable() {
    return m_draggable;
  }
  
  private void setDraggable(boolean b) {
    m_draggable = b;
  }
 
  // 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_maximize = new InnerFrameButton(MAXIMIZE_BUTTON_ICON);
    m_maximize.setPressedIcon(PRESS_MAXIMIZE_BUTTON_ICON);
    m_maximize.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        InnerFrame.this.setMaximized(!InnerFrame.this.isMaximized());
      }
    });

    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(1,3));
    m_buttonPanel.setOpaque(false);
    m_buttonPanel.add(m_iconize);
    m_buttonPanel.add(m_maximize);
    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;
    }

    // don't allow dragging outside of parent
    public void mouseDragged(MouseEvent e) {
      int ex = e.getX();
      int ey = e.getY();
      int x = m_if.getX();
      int y = m_if.getY();
      int w = m_if.getParent().getWidth();
      int h = m_if.getParent().getHeight();
      if (m_dragging & m_if.isDraggable()) {
        if ((ey + y > 0 && ey + y < h) && (ex + x > 0 && ex + x < w))
          m_if.setLocation(ex-m_XDifference + x, ey-m_YDifference + y);
        else if (!(ey + y > 0 && ey + y < h) && (ex + x > 0 && ex + x < w)) {
          if (!(ey + y > 0) && ey + y < h)
            m_if.setLocation(ex-m_XDifference + x, 0-m_YDifference);
          else if (ey + y > 0 && !(ey + y < h))
            m_if.setLocation(ex-m_XDifference + x, h-m_YDifference);
        }
        else if ((ey + y > 0 && ey + y < h) && !(ex + x > 0 && ex + x < w)) {
          if (!(ex + x > 0) && ex + x < w)
            m_if.setLocation(0-m_XDifference, ey-m_YDifference + y);
          else if (ex + x > 0 && !(ex + x < w)) 
            m_if.setLocation(w-m_XDifference, ey-m_YDifference + y);
        }
        else if (!(ey + y > 0) && ey + y < h && !(ex + x > 0) && ex + x < w) 
          m_if.setLocation(0-m_XDifference, 0-m_YDifference);
        else if (!(ey + y > 0) && ey + y < h && ex + x > 0 && !(ex + x < w)) 
          m_if.setLocation(w-m_XDifference, 0-m_YDifference);
        else if (ey + y > 0 && !(ey + y < h) && !(ex + x > 0) && ex + x < w) 
          m_if.setLocation(0-m_XDifference, h-m_YDifference);
        else if (ey + y > 0 && !(ey + y < h) && ex + x > 0 && !(ex + x < w)) 
          m_if.setLocation(w-m_XDifference, h-m_YDifference);
      }
    } 

    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);