Java JTable Column Size Calculate adjustColumnSizes(JTable table, int column, int margin)

Description

Method sets columns width to the widest value

License

Open Source License

Parameter

Parameter	Description
table	a parameter
column	a parameter
margin	a parameter

Declaration

public static void adjustColumnSizes(JTable table, int column, int margin) 

Method Source Code

//package com.java2s;
/*/*from   w  w  w.j a v  a 2s.co  m*/
* Open-Source tuning tools
*
* 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 2 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

import java.awt.Component;

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

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

public class Main {
    /**
     * Method sets columns width to the widest value
     * @param table
     * @param column
     * @param margin
     */
    public static void adjustColumnSizes(JTable table, int column, int margin) {
        DefaultTableColumnModel colModel = (DefaultTableColumnModel) table.getColumnModel();
        TableColumn col = colModel.getColumn(column);
        int width;
        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;
        for (int r = 0; r < table.getRowCount(); ++r) {
            renderer = table.getCellRenderer(r, column);
            comp = renderer.getTableCellRendererComponent(table, table.getValueAt(r, column), false, false, r,
                    column);
            int currentWidth = comp.getPreferredSize().width;
            width = Math.max(width, currentWidth);
        }
        width += 2 * margin;
        col.setPreferredWidth(width);
    }
}

Related

1. autoSizeCols(JTable table)
2. autoSizeTableColumns(JTable table)
3. calcColumnWidth(JTable table, int col)
4. calcColumnWidths(final JTable table)