MatchScoreRenderer.java

package com.vistatec.ocelot.tm.gui.match;

import java.awt.Color;
import java.awt.Component;

import javax.swing.JTable;
import javax.swing.JTextPane;
import javax.swing.text.BadLocationException;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.DefaultHighlighter.DefaultHighlightPainter;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Table cell renderer for numeric values. It highlight the value with different
 * colors depending on the interval where the value falls.
 */
public class MatchScoreRenderer extends AlternateRowsColorRenderer {
    private static final Logger LOG = LoggerFactory.getLogger(MatchScoreRenderer.class);

	/** serial version UID. */
	private static final long serialVersionUID = -8959470309220918429L;

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * javax.swing.table.DefaultTableCellRenderer#getTableCellRendererComponent
	 * (javax.swing.JTable, java.lang.Object, boolean, boolean, int, int)
	 */
	@Override
	public Component getTableCellRendererComponent(JTable table, Object value,
			boolean isSelected, boolean hasFocus, int row, int column) {

		Component comp = super.getTableCellRendererComponent(table,
				value, isSelected, hasFocus, row, column);
		JTextPane textPane = new JTextPane();
		textPane.setBackground(comp.getBackground());
		textPane.setForeground(Color.white);
		textPane.setFont(comp.getFont());
		if (comp != null && value != null) {
			int score = (int) value;
			Color highlightColor = comp.getBackground();
			if (score == 100) {
				highlightColor = new Color(16, 164, 87);
			} else if (score >= 95) {
				highlightColor = new Color(95, 164, 16);
			} else if (score >= 85) {
				highlightColor = new Color(232, 206, 11);
			} else if (score >= 75) {
				highlightColor = new Color(232, 143, 11);
			} else if (score >= 65) {
				highlightColor = new Color(232, 99, 11);
			} else {
				highlightColor = new Color(232, 51, 11);
			}

			DefaultHighlightPainter painter = new DefaultHighlightPainter(
					highlightColor);
			StyledDocument style = textPane.getStyledDocument();
			SimpleAttributeSet rightAlign = new SimpleAttributeSet();
			StyleConstants.setAlignment(rightAlign, StyleConstants.ALIGN_RIGHT);
			try {
				style.insertString(style.getLength(), " " + value + "% ",
						rightAlign);
				textPane.getHighlighter().addHighlight(0,
						textPane.getText().length(), painter);
			} catch (BadLocationException e) {
				LOG.warn("Error while highlighting the score " + value
								+ "at column " + column + " and row " + row
								+ ".", e);
			}
		}
		return textPane;
	}

}