JHintTextField.java

package com.jaumard.sails.ui;

import javax.swing.*;
import java.awt.*;

/**
 * Created by jaumard on 04/04/2015.
 */
public class JHintTextField extends JTextField
{
    public JHintTextField(int columns)
    {
        super(columns);
    }

    @Override
    public void paint(Graphics g)
    {
        super.paint(g);
        if (getText().length() == 0)
        {
            int h = getHeight();
            ((Graphics2D) g).setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
            Insets ins = getInsets();
            FontMetrics fm = g.getFontMetrics();
            int c0 = getBackground().getRGB();
            int c1 = getForeground().getRGB();
            int m = 0xfefefefe;
            int c2 = ((c0 & m) >>> 1) + ((c1 & m) >>> 1);
            g.setColor(new Color(c2, true));
            g.drawString(_hint, ins.left, h / 2 + fm.getAscent() / 2 - 2);
        }
    }

    private String _hint = "";

    public String getHint()
    {
        return _hint;
    }

    public void setHint(String hint)
    {
        _hint = hint;
        repaint();
    }

}