//Titre :        linkLabel 
//Version : 
//Copyright :    Copyright (c) 1999..2000 
//Auteur :       BERTHOU 
//Société :      BERTHOU 
//Description :  Exemple simple de creation d'un bean 

package rblBeans ; 

import java.awt.*; 
import java.awt.event.*; 

public class linkLabel extends Label 
       implements MouseListener 
{ 
     // URL 
     private String URL= null; 

     // Color for the link (not the text) 
     private Color  linkColor, linkbgColor; 
     private Color  sColor1, sColor2; 

        transient boolean bOn = false ; 

     transient ActionListener actionListener = null; 

     /** 
       * Creates a linkLabel with no specific data 
       * 
       */ 
        public linkLabel() { 
                this("", null, Color.blue, null); 
        } 

     /** 
       * Creates a linkLabel with no specific hyperlink 
       * 
       * @param label    Text of label 
       */ 
     public linkLabel(String label) 
     { 
          this(label, null, Color.blue, null); 
     } 

     /** 
       * Creates a linkLabel hyperlinked to the URL. 
       * 
       * @param label    Text of label 
       * @param URL      Universal Resource Locator (URL) 
       */ 
     public linkLabel(String label, String URL) 
     { 
          this(label, URL, Color.blue, null); 
     } 

     /** 
       * Creates a linkLabel , 
       * 
       * @param label    Text of label 
       * @param URL      Universal Resource Locator (URL) 
       * @param color  Color of hyperlink 
       */ 
     public linkLabel(String label, String URL, Color color) 
     { 
          this(label, URL, color, null); 
     } 

     /** 
       * Creates a linkLabel with all data, 
       * 
       * @param label    Text of label 
       * @param URL      Universal Resource Locator (URL) 
       * @param color  Color   of hyperlink 
       * @param color  BgColor of hyperlink 
       */ 
     public linkLabel(String label, String URL, Color color1, Color color2) 
     { 
          super(label); 

          setURL  (URL); 
          setlinkColor(color1); 
          setlinkbgColor(color2); 

          addMouseListener(this); 
     } 

     /** 
       * Sets the URL destination for this hyperlink. 
       * 
       * @param URL      Universal Resource Locator (URL) 
       */ 
     public void setURL(String URL) 
     { 
          this.URL=URL; 
     } 

     /** 
       * Sets the color for this hyperlink. 
       * 
       * @param color    Color of hyperlink 
       */ 
     public void setlinkColor (Color color) 
     { 
          this.linkColor=color; 
     } 

     /** 
       * Returns the color for this hyperlink. 
       * 
       * @return Color of hyperlink 
       */ 
     public Color getlinkColor () 
     { 
          return linkColor; 
     } 

     /** 
       * Sets the background color for this hyperlink. 
       * 
       * @param color   background Color of hyperlink 
       */ 
     public void setlinkbgColor (Color color) 
     { 
          this.linkbgColor=color; 
     } 

     /** 
       * Returns the background color for this hyperlink. 
       * 
       * @return background Color of hyperlink 
       */ 
     public Color getlinkbgColor () 
     { 
          return linkbgColor; 
     } 

     /** 
       * Returns the URL for this hyperlink. 
       * 
       * @return URL as a String 
       */ 
     public String getURL () 
     { 
          return URL; 
     } 

     /** 
       * Paints the hyperlink 
       * 
       * @param g    Graphics object for painting 
       */ 
     public void paint(Graphics g) 
     { 
          // Call label's paint method 
          super.paint(g); 

          // Check that a hyperlink was specified 
          if (URL == null) return; 

          // Set color for hyperlink 
                if (bOn) { 
                    g.setColor ( linkColor ); 
                } 

          // Get width of hyperlink label component 
          Dimension d = getSize(); 
          int width = d.width; 
          int height= d.height; 

          // Get width of label text 
          FontMetrics metrics = getFontMetrics(getFont()); 
          int strWidth = metrics.stringWidth( getText() ); 

          int offset = width - strWidth ; 

          int align = getAlignment(); 

          switch (align) 
          { 
          case LEFT : 
               g.drawLine ( 2, height-5, 2 +strWidth, height-5); 
               break; 
          case CENTER : 
               g.drawLine ( offset/2 + 1, height-5, width - offset/2 -1, height-5); 
               break; 
          case RIGHT : 
               g.drawLine ( offset - 2, height-5, width, height-5); 
               break; 
          } 
     } 

     /** 
      * Adds action listener to receive action events from 
      * this hyperlink. 
      * 
      * @param listener  ActionListener to add to event queue 
      */ 
     public synchronized void addActionListener(ActionListener listener) { 
          actionListener = AWTEventMulticaster.add(actionListener, listener); 
     } 

     /** 
      * Removes action listener from the list of action listeners 
      * associated with this hyperlink. 
      * 
      * @param listener  ActionListener to add to event queue 
      */ 
     public synchronized void removeActionListener(ActionListener listener) { 
          actionListener = AWTEventMulticaster.remove(actionListener, listener); 
     } 

     /** 
      * Event handler when the mouse is clcked on the hyperlink<br> 
         *  send click action to all listeners 
      * @param MouseEvent Event 
      */ 
     public void mouseClicked(MouseEvent e) { 
          if (actionListener != null) { 
               actionListener.actionPerformed(new ActionEvent(this, 
                    ActionEvent.ACTION_PERFORMED, "Clicked")); 
          } 
     } 

     /** 
      * Event handler when the cursor enters the hyperlink 
      * @param MouseEvent Event 
      */ 
     public void mouseEntered(MouseEvent e) 
     { 
                bOn = true ; 

          sColor1 = getForeground(); 
          setForeground ( linkColor ); 

          sColor2 = getBackground() ; 
                if (linkbgColor != null) 
                  setBackground ( linkbgColor ); 

          setCursor (new Cursor(Cursor.HAND_CURSOR)); 
     } 

     /** 
       * Event handler for when the cursor leaves the hyperlink 
       * @param MouseEvent Event 
       */ 
     public void mouseExited(MouseEvent e) 
     { 
                bOn = false ; 
          setForeground ( sColor1 ); 
                setBackground ( sColor2 ); 
          setCursor (new Cursor(Cursor.DEFAULT_CURSOR)); 
     } 

     public void mousePressed(MouseEvent e)  { } 
     public void mouseReleased(MouseEvent e) { } 

     /** 
       * Returns the preferred size of the hyperlink. 
       * @return Preferred dimensions 
       */ 
     public Dimension getPreferredSize() 
     { 
          // Shave a little off original width 
          FontMetrics metrics = getFontMetrics(getFont()); 
          int strWidth = metrics.stringWidth( getText() ); 

          Dimension original = super.getPreferredSize(); 
          return new Dimension (strWidth+2, original.height); 
     } 


}