NumericCellRenderer.java

/*
 * Copyright (c) 2012 Patrick Meyer
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.itemanalysis.jmetrik.swing;

import javax.swing.*;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import java.awt.*;

public class NumericCellRenderer extends DefaultTableCellRenderer {
    
    private int precision = 4;
    
    public NumericCellRenderer(int precision){
        this.precision = precision;
    }

    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int rowIndex, int colIndex) {
        Component c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, rowIndex, colIndex);
        if (c instanceof JLabel && value instanceof Number) {
            JLabel label = (JLabel) c;
            label.setHorizontalAlignment(JLabel.RIGHT);
            Number  number = (Number)value;
            String text = String.format(" %."+precision+"f", number);
            label.setText(text);
        }
        return c;
    }

}