package example;

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

import org.jdesktop.swingx.JXTextArea;
 
public class JScrollableToolTip extends JToolTip implements MouseWheelListener {
 
    private JXTextArea tipArea;
    
    /** Creates a tool tip. */
    public JScrollableToolTip(final int width, final int height) {
        setPreferredSize(new Dimension(width, height));
        setLayout(new BorderLayout());
        tipArea = new JXTextArea();
        tipArea.setLineWrap(true);
        tipArea.setWrapStyleWord(true);
        tipArea.setEditable(true);
        //tipArea.setBorder(new BevelBorder(BevelBorder.LOWERED, null, null, null, null));
        
        LookAndFeel.installColorsAndFont(tipArea, 
                "ToolTip.background",
                "ToolTip.foreground",
                "ToolTip.font");
        
        //LookAndFeel.installBorder(tipArea, "InternalFrame.border");                
        
        JScrollPane scrollpane = new JScrollPane(tipArea);
        scrollpane.setBorder(UIManager.getBorder("InternalFrame.border"));
        scrollpane.getViewport().setOpaque(false);
        add(scrollpane);
                
    }
    
    @Override
    public void addNotify() {
        super.addNotify();
        JComponent comp = getComponent();
        if (comp != null) {
            comp.addMouseWheelListener(this);
        }
    }
 
    @Override
    public void removeNotify() {
        JComponent comp = getComponent();
        if(comp != null) {
            comp.removeMouseWheelListener(this);
        } 
        super.removeNotify();
    }
    
    public void mouseWheelMoved(final MouseWheelEvent e) {
        JComponent comp = getComponent();
        if(comp != null) {
            tipArea.dispatchEvent(new MouseWheelEvent(tipArea, 
                    e.getID(), e.getWhen(), e.getModifiers(),
                    0, 0, e.getClickCount(), e.isPopupTrigger(),
                    e.getScrollType(), e.getScrollAmount(), e.getWheelRotation()));
        }
    }
 
    @Override
    public void setTipText(/*final*/ String tipText) {
        String oldValue = this.tipArea.getText();
        tipArea.setText(tipText);
        tipArea.setCaretPosition(0);
        firePropertyChange("tiptext", oldValue, tipText);
    }
 
    @Override
    public String getTipText() {
        return tipArea == null ? "" : tipArea.getText();
    }
 
    @Override
    protected String paramString() {
        String tipTextString = (tipArea.getText() != null ? tipArea.getText() : "");
 
        return super.paramString()
                + ",tipText=" + tipTextString;
    }
 
    //for testing only:
    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (Exception e) {
                    e.printStackTrace();
                }
                
                JFrame f = new JFrame("JScrollableToolTip");
                f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                f.setSize(300, 200);
                f.setLocationRelativeTo(null);
                ToolTipManager.sharedInstance().setDismissDelay(Integer.MAX_VALUE);
                               
                JTable table = new JTable(50, 4) {
         
                    @Override
                    public JToolTip createToolTip() {
                        JScrollableToolTip tip = new JScrollableToolTip(200, 80);                         
                        tip.setComponent(this);
                        return tip; 
                    }
                };
                table.setToolTipText("Used to display a 'Tip' for a Component. "
                        + "Typically components provide api to automate the process of "
                        + "using ToolTips. For example, any Swing component can use the "
                        + "JComponent  setToolTipText method to specify the text for a standard tooltip.");
                f.add(new JScrollPane(table));
                f.setVisible(true);
            }
        });
        
    }
}