package com.opensymphony.workflow.designer.swing;import java.awt.*;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;import javax.swing.*;import javax.swing.border.AbstractBorder;public class FramePanel extends JPanel{  private JLabel titleLabel;  private GradientPanel gradientPanel;  private JPanel headerPanel;  private boolean isSelected;  private boolean closeable = false;  /**   * Constructs a <code>FramePanel</code> for the specified   * icon, title, tool bar, and content panel.   */  public FramePanel(Icon frameIcon, String title, JToolBar bar, JComponent content, boolean closeable)  {    super(new BorderLayout());    this.isSelected = false;    this.closeable = closeable;    this.titleLabel = new JLabel(title, frameIcon, SwingConstants.LEADING);    JPanel top = buildHeader(titleLabel, bar);    add(top, BorderLayout.NORTH);    if(content != null)    {      setContent(content);    }    setBorder(new ShadowBorder());    setSelected(true);    updateHeader();  }  /**   * Constructs a <code>FramePanel</code> for the specified   * title, tool bar, and content panel.   */  public FramePanel(String title, JToolBar bar, JComponent c, boolean closeable)  {    this(null, title, bar, c, closeable);  }  /**   * Constructs a <code>FramePanel</code> for the specified   * icon, and title.   */  public FramePanel(Icon icon, String title, boolean closeable)  {    this(icon, title, null, null, closeable);  }  /**   * Constructs a <code>FramePanel</code> for the specified title.   */  public FramePanel(String title, boolean closeable)  {    this(null, title, null, null, closeable);  }  public Icon getFrameIcon()  {    return titleLabel.getIcon();  }  public void setFrameIcon(Icon icon)  {    titleLabel.setIcon(icon);  }  public String getTitle()  {    return titleLabel.getText();  }  public void setTitle(String text)  {    titleLabel.setText(text);  }  public void setToolBar(JToolBar bar)  {    if(bar != null)    {      bar.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 0));      headerPanel.add(bar, BorderLayout.EAST);    }  }  public Component getContent()  {    return hasContent() ? getComponent(1) : null;  }  /**   * Set the component to show in the panel.   */  public void setContent(Component content)  {    if(hasContent())    {      remove(getContent());    }    add(content, BorderLayout.CENTER);  }  public boolean isSelected()  {    return isSelected;  }  public void setSelected(boolean selected)  {    isSelected = selected;    updateHeader();  }  private JPanel buildHeader(JLabel label, JToolBar bar)  {    gradientPanel = new GradientPanel(new BorderLayout(), getHeaderBackground());    label.setOpaque(false);    gradientPanel.add(label, BorderLayout.WEST);    gradientPanel.setBorder(BorderFactory.createEmptyBorder(3, 4, 3, 1));    headerPanel = new JPanel(new BorderLayout());    headerPanel.add(gradientPanel, BorderLayout.CENTER);    setToolBar(bar);    headerPanel.setBorder(new RaisedHeaderBorder());    headerPanel.setOpaque(false);    return headerPanel;  }  private void updateHeader()  {    gradientPanel.setBackground(getHeaderBackground());    gradientPanel.setOpaque(isSelected());    if(closeable)    {      JButton button = new JButton(new ImageIcon(getClass().getResource("/images/close.gif")));      button.setBorderPainted(false);      button.setOpaque(false);      button.setMargin(new Insets(0, 0, 0, 0));      button.addActionListener(new ActionListener()      {        public void actionPerformed(ActionEvent e)        {          close();        }      });      gradientPanel.add(button, BorderLayout.EAST);    }    titleLabel.setForeground(getTextForeground(isSelected()));    headerPanel.repaint();  };  public void close()  {    if(closeable)    {      JComponent parent = (JComponent)getParent();      //parent.remove(SimpleInternalFrame.this);      setVisible(false);      parent.revalidate();    }  }  public void updateUI()  {    super.updateUI();    if(titleLabel != null)    {      updateHeader();    }  }  private boolean hasContent()  {    return getComponentCount() > 1;  }  protected Color getTextForeground(boolean selected)  {    Color c = UIManager.getColor(selected ? "FramePanel.activeTitleForeground" : "FramePanel.inactiveTitleForeground");    if(c != null)    {      return c;    }    return UIManager.getColor(selected ? "InternalFrame.activeTitleForeground" : "Label.foreground");  }  protected Color getHeaderBackground()  {    Color c = UIManager.getColor("FramePanel.activeTitleBackground");    if(c != null)      return c;    return UIManager.getColor("InternalFrame.activeTitleBackground");  }  private static class RaisedHeaderBorder extends AbstractBorder  {    private static final Insets INSETS = new Insets(1, 1, 1, 0);    public Insets getBorderInsets(Component c)    {      return INSETS;    }    public void paintBorder(Component c, Graphics g, int x, int y, int w, int h)    {      g.translate(x, y);      g.setColor(UIManager.getColor("controlLtHighlight"));      g.fillRect(0, 0, w, 1);      g.fillRect(0, 1, 1, h - 1);      g.setColor(UIManager.getColor("controlShadow"));      g.fillRect(0, h - 1, w, h);      g.translate(-x, -y);    }  }  private static class ShadowBorder extends AbstractBorder  {    private static final Insets INSETS = new Insets(1, 1, 3, 3);    public Insets getBorderInsets(Component c)    {      return INSETS;    }    public void paintBorder(Component c, Graphics g, int x, int y, int w, int h)    {      Color shadow = UIManager.getColor("controlShadow");      Color lightShadow = new Color(shadow.getRed(), shadow.getGreen(), shadow.getBlue(), 170);      Color lighterShadow = new Color(shadow.getRed(), shadow.getGreen(), shadow.getBlue(), 70);      g.translate(x, y);      g.setColor(shadow);      g.fillRect(0, 0, w - 3, 1);      g.fillRect(0, 0, 1, h - 3);      g.fillRect(w - 3, 1, 1, h - 3);      g.fillRect(1, h - 3, w - 3, 1);      // Shadow line 1      g.setColor(lightShadow);      g.fillRect(w - 3, 0, 1, 1);      g.fillRect(0, h - 3, 1, 1);      g.fillRect(w - 2, 1, 1, h - 3);      g.fillRect(1, h - 2, w - 3, 1);      // Shadow line2      g.setColor(lighterShadow);      g.fillRect(w - 2, 0, 1, 1);      g.fillRect(0, h - 2, 1, 1);      g.fillRect(w - 2, h - 2, 1, 1);      g.fillRect(w - 1, 1, 1, h - 2);      g.fillRect(1, h - 1, w - 2, 1);      g.translate(-x, -y);    }  }  private static class GradientPanel extends JPanel  {    private GradientPanel(LayoutManager lm, Color background)    {      super(lm);      setBackground(background);    }    public void paintComponent(Graphics g)    {      super.paintComponent(g);      if(!isOpaque())      {        return;      }      Color control = UIManager.getColor("control");      int width = getWidth();      int height = getHeight();      Graphics2D g2 = (Graphics2D)g;      Paint storedPaint = g2.getPaint();      g2.setPaint(new GradientPaint(0, 0, getBackground(), width, 0, control));      g2.fillRect(0, 0, width, height);      g2.setPaint(storedPaint);    }  }}