import java.awt.Component;
import java.awt.Dimension;
import java.awt.FontMetrics;
import java.awt.geom.Rectangle2D;

import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.ListCellRenderer;

public class ComboBoxRenderer extends JLabel
                       implements ListCellRenderer {
    
    /**
	 * 
	 */
//	private static final long serialVersionUID = 1L;
	private Dimension d = null;
	private JComboBox box;
	private JLabel labelToInsert = null;

	public ComboBoxRenderer(JComboBox box) {
        setOpaque(true);
        setHorizontalAlignment(LEFT);
        setVerticalAlignment(CENTER);
        this.box = box;
        calculateWidth();
    }
	
	public void setLabelToInsert(JLabel l){
		this.labelToInsert = l;
	}
	
	private void calculateWidth(){
		FontMetrics fm = box.getFontMetrics(box.getFont());
		int i = 0;
		int y= 0;
		for(int temp = 0; temp < box.getItemCount();temp++){
			String st = (String) box.getItemAt(temp);
			Rectangle2D rect =  fm.getStringBounds(st,this.getGraphics());
			if(rect.getWidth() > i)
				i = (int) rect.getWidth();
			y= (int)rect.getHeight();
		}
		d =new Dimension(i+20,y);
	     
	}

	

	
	public Component getListCellRendererComponent(
                                       JList list,
                                       Object value,
                                       int index,
                                       boolean isSelected,
                                       boolean cellHasFocus) {

  	   setText((String)value);
  	   this.setMinimumSize(d);
   	   this.setPreferredSize(d);
   	   this.setMaximumSize(d);
        if (isSelected) {
            setBackground(list.getSelectionBackground());
            setForeground(list.getSelectionForeground());
            if(labelToInsert != null)
            	labelToInsert.setText(this.getText());
        } else {
            setBackground(list.getBackground());
            setForeground(list.getForeground());
        }

        return this;
    }
}