JTables.java

/*******************************************************************************
 * GenPlay, Einstein Genome Analyzer
 * Copyright (C) 2009, 2014 Albert Einstein College of Medicine
 * 
 * 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/>.
 * Authors: Julien Lajugie <julien.lajugie@einstein.yu.edu>
 *          Nicolas Fourel <nicolas.fourel@einstein.yu.edu>
 *          Eric Bouhassira <eric.bouhassira@einstein.yu.edu>
 * 
 * Website: <http://genplay.einstein.yu.edu>
 ******************************************************************************/
package edu.yu.einstein.genplay.util;

import java.awt.Component;

import javax.swing.JTable;
import javax.swing.table.DefaultTableColumnModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;

/**
 * This class provide utility methods for JTable objects
 * @author Julien Lajugie
 */
public class JTables {

	/**
	 * Sets the preferred width of the visible column specified by vColIndex. The column
	 * will be just wide enough to show the column head and the widest cell in the column.
	 * margin pixels are added to the left and right
	 * (resulting in an additional width of 2*margin pixels).
	 */
	public static void packColumn(JTable table, int vColIndex, int margin) {
		DefaultTableColumnModel colModel = (DefaultTableColumnModel)table.getColumnModel();
		TableColumn col = colModel.getColumn(vColIndex);
		int width = 0;

		// Get width of column header
		TableCellRenderer renderer = col.getHeaderRenderer();
		if (renderer == null) {
			renderer = table.getTableHeader().getDefaultRenderer();
		}
		Component comp = renderer.getTableCellRendererComponent(
				table, col.getHeaderValue(), false, false, 0, 0);
		width = comp.getPreferredSize().width;

		// Get maximum width of column data
		for (int r=0; r<table.getRowCount(); r++) {
			renderer = table.getCellRenderer(r, vColIndex);
			comp = renderer.getTableCellRendererComponent(
					table, table.getValueAt(r, vColIndex), false, false, r, vColIndex);
			width = Math.max(width, comp.getPreferredSize().width);
		}

		// Add margin
		width += 2*margin;

		// Set the width
		col.setPreferredWidth(width);
	}
}