Swing Components Java

// Example from http://www.crionics.com/products/opensource/faq/swing_ex/SwingExamples.html
/* (swing1.1.1) */
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
/**
 * @version 1.0 08/13/99
 */
public class CompTitledPaneExample3 extends JFrame {
  public CompTitledPaneExample3() {
    super("CompTitledPaneExample3");
    Container c = getContentPane();
    c.setLayout(new GridLayout(2, 2));
    ButtonGroup group = new ButtonGroup();
    APanel p = new APanel(group, "Metal");
    c.add(p);
    c.add(new APanel(group, "Motif"));
    c.add(new APanel(group, "Mac"));
    c.add(new APanel(group, "Windows"));
    p.getRadioButton().setSelected(true);
  }
  class APanel extends CompTitledPane {
    JRadioButton titleComp;
    APanel(ButtonGroup group, final String text) {
      titleComp = new JRadioButton(text);
      final JButton button = new JButton(text);
      setTitleComponent(titleComp);
      this.titleComp = titleComp;
      group.add(titleComp);
      titleComp.setSelected(true);
      titleComp.addItemListener(new ItemListener() {
        public void itemStateChanged(ItemEvent e) {
          button.setEnabled(e.getStateChange() == ItemEvent.SELECTED);
        }
      });
      button.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
          System.out.println(text);
        }
      });
      getContentPane().add(button);
    }
    public JRadioButton getRadioButton() {
      return titleComp;
    }
  }
  public static void main(String args[]) {
    try {
        UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
    } catch (Exception evt) {}
  
    CompTitledPaneExample3 frame = new CompTitledPaneExample3();
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
    frame.setSize(280, 200);
    frame.setVisible(true);
  }
}
class CompTitledPane extends JPanel {
  protected CompTitledBorder border;
  protected JComponent component;
  protected JPanel panel;
  protected boolean transmittingAllowed;
  protected StateTransmitter transmitter;
  public CompTitledPane() {
    this(new JLabel("Title"));
    // debug
    // JLabel label = (JLabel)getTitleComponent();
    // label.setOpaque(true);
    // label.setBackground(Color.yellow);
  }
  public CompTitledPane(JComponent component) {
    this.component = component;
    border = new CompTitledBorder(component);
    setBorder(border);
    panel = new JPanel();
    setLayout(null);
    add(component);
    add(panel);
    transmittingAllowed = false;
    transmitter = null;
  }
  public JComponent getTitleComponent() {
    return component;
  }
  public void setTitleComponent(JComponent newComponent) {
    remove(component);
    add(newComponent);
    border.setTitleComponent(newComponent);
    component = newComponent;
  }
  public JPanel getContentPane() {
    return panel;
  }
  public void doLayout() {
    Insets insets = getInsets();
    Rectangle rect = getBounds();
    rect.x = 0;
    rect.y = 0;
    Rectangle compR = border.getComponentRect(rect, insets);
    component.setBounds(compR);
    rect.x += insets.left;
    rect.y += insets.top;
    rect.width -= insets.left + insets.right;
    rect.height -= insets.top + insets.bottom;
    panel.setBounds(rect);
  }
  public void setTransmittingAllowed(boolean enable) {
    transmittingAllowed = enable;
  }
  public boolean getTransmittingAllowed() {
    return transmittingAllowed;
  }
  public void setTransmitter(StateTransmitter transmitter) {
    this.transmitter = transmitter;
  }
  public StateTransmitter getTransmitter() {
    return transmitter;
  }
  public void setEnabled(boolean enable) {
    super.setEnabled(enable);
    if (transmittingAllowed && transmitter != null) {
      transmitter.setChildrenEnabled(enable);
    }
  }
}
interface StateTransmitter {
  public void setChildrenEnabled(boolean enable);
}
class CompTitledBorder extends TitledBorder {
  protected JComponent component;
  public CompTitledBorder(JComponent component) {
    this(null, component, LEFT, TOP);
  }
  public CompTitledBorder(Border border) {
    this(border, null, LEFT, TOP);
  }
  public CompTitledBorder(Border border, JComponent component) {
    this(border, component, LEFT, TOP);
  }
  public CompTitledBorder(Border border, JComponent component,
      int titleJustification, int titlePosition) {
    super(border, null, titleJustification, titlePosition, null, null);
    this.component = component;
    if (border == null) {
      this.border = super.getBorder();
    }
  }
  public void paintBorder(Component c, Graphics g, int x, int y, int width,
      int height) {
    Rectangle borderR = new Rectangle(x + EDGE_SPACING, y + EDGE_SPACING,
        width - (EDGE_SPACING * 2), height - (EDGE_SPACING * 2));
    Insets borderInsets;
    if (border != null) {
      borderInsets = border.getBorderInsets(c);
    } else {
      borderInsets = new Insets(0, 0, 0, 0);
    }
    Rectangle rect = new Rectangle(x, y, width, height);
    Insets insets = getBorderInsets(c);
    Rectangle compR = getComponentRect(rect, insets);
    int diff;
    switch (titlePosition) {
    case ABOVE_TOP:
      diff = compR.height + TEXT_SPACING;
      borderR.y += diff;
      borderR.height -= diff;
      break;
    case TOP:
    case DEFAULT_POSITION:
      diff = insets.top / 2 - borderInsets.top - EDGE_SPACING;
      borderR.y += diff;
      borderR.height -= diff;
      break;
    case BELOW_TOP:
    case ABOVE_BOTTOM:
      break;
    case BOTTOM:
      diff = insets.bottom / 2 - borderInsets.bottom - EDGE_SPACING;
      borderR.height -= diff;
      break;
    case BELOW_BOTTOM:
      diff = compR.height + TEXT_SPACING;
      borderR.height -= diff;
      break;
    }
    border.paintBorder(c, g, borderR.x, borderR.y, borderR.width,
        borderR.height);
    Color col = g.getColor();
    g.setColor(c.getBackground());
    g.fillRect(compR.x, compR.y, compR.width, compR.height);
    g.setColor(col);
    component.repaint();
  }
  public Insets getBorderInsets(Component c, Insets insets) {
    Insets borderInsets;
    if (border != null) {
      borderInsets = border.getBorderInsets(c);
    } else {
      borderInsets = new Insets(0, 0, 0, 0);
    }
    insets.top = EDGE_SPACING + TEXT_SPACING + borderInsets.top;
    insets.right = EDGE_SPACING + TEXT_SPACING + borderInsets.right;
    insets.bottom = EDGE_SPACING + TEXT_SPACING + borderInsets.bottom;
    insets.left = EDGE_SPACING + TEXT_SPACING + borderInsets.left;
    if (c == null || component == null) {
      return insets;
    }
    int compHeight = 0;
    if (component != null) {
      compHeight = component.getPreferredSize().height;
    }
    switch (titlePosition) {
    case ABOVE_TOP:
      insets.top += compHeight + TEXT_SPACING;
      break;
    case TOP:
    case DEFAULT_POSITION:
      insets.top += Math.max(compHeight, borderInsets.top)
          - borderInsets.top;
      break;
    case BELOW_TOP:
      insets.top += compHeight + TEXT_SPACING;
      break;
    case ABOVE_BOTTOM:
      insets.bottom += compHeight + TEXT_SPACING;
      break;
    case BOTTOM:
      insets.bottom += Math.max(compHeight, borderInsets.bottom)
          - borderInsets.bottom;
      break;
    case BELOW_BOTTOM:
      insets.bottom += compHeight + TEXT_SPACING;
      break;
    }
    return insets;
  }
  public JComponent getTitleComponent() {
    return component;
  }
  public void setTitleComponent(JComponent component) {
    this.component = component;
  }
  public Rectangle getComponentRect(Rectangle rect, Insets borderInsets) {
    Dimension compD = component.getPreferredSize();
    Rectangle compR = new Rectangle(0, 0, compD.width, compD.height);
    switch (titlePosition) {
    case ABOVE_TOP:
      compR.y = EDGE_SPACING;
      break;
    case TOP:
    case DEFAULT_POSITION:
      compR.y = EDGE_SPACING
          + (borderInsets.top - EDGE_SPACING - TEXT_SPACING - compD.height)
          / 2;
      break;
    case BELOW_TOP:
      compR.y = borderInsets.top - compD.height - TEXT_SPACING;
      break;
    case ABOVE_BOTTOM:
      compR.y = rect.height - borderInsets.bottom + TEXT_SPACING;
      break;
    case BOTTOM:
      compR.y = rect.height
          - borderInsets.bottom
          + TEXT_SPACING
          + (borderInsets.bottom - EDGE_SPACING - TEXT_SPACING - compD.height)
          / 2;
      break;
    case BELOW_BOTTOM:
      compR.y = rect.height - compD.height - EDGE_SPACING;
      break;
    }
    switch (titleJustification) {
    case LEFT:
    case DEFAULT_JUSTIFICATION:
      compR.x = TEXT_INSET_H + borderInsets.left;
      break;
    case RIGHT:
      compR.x = rect.width - borderInsets.right - TEXT_INSET_H
          - compR.width;
      break;
    case CENTER:
      compR.x = (rect.width - compR.width) / 2;
      break;
    }
    return compR;
  }
}