import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Point;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;

import javax.swing.JTextField;


public class HintTextField extends JTextField{
	private String hint;
	public void setHint(String hint){
		this.hint=hint;
	}
	public String getHint(){
		if(hint==null)
			hint="";
		return hint;
	}
	public void setText(String arg0) {
		super.setText(arg0);
		repaint();
	}
	
	public HintTextField(){
		super();
		
		addFocusListener(new FocusListener(){
			public void focusGained(FocusEvent arg0) {
				repaint();
			}
			public void focusLost(FocusEvent arg0) {
				repaint();
			}
		});
	}
	
	protected void paintComponent(Graphics g) {
		super.paintComponent(g);
		
		if( hasFocus() ){
			return ;
		}
		if( getText().length()>0 ){
			return ;
		}
		if( getHint().length()<1){
			return ;
		}
		
		Font oldFont=g.getFont();
		Color oldColor=g.getColor();
		{
			g.setFont(getFont());
			g.setColor(Color.LIGHT_GRAY);
			
			Insets insets=getBorder().getBorderInsets(this);
			int h=g.getFontMetrics().getAscent();
			g.drawString(getHint(),insets.left,insets.top+h);
		}
		g.setFont(oldFont);
		g.setColor(oldColor);
		
	}
}