/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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 Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.libraries.designtime.swing;
import javax.swing.*;
import java.awt.*;
/**
* A list cell renderer that corrects the obvious Swing bug where empty strings or null-values as first element in a
* JList or a JCombobox cause the list to have a size near to zero. This bug prevents any meaningful interaction with
* the List/Combobox.
*
* @author Thomas Morgner.
*/
public class EmptyValueListCellRenderer extends DefaultListCellRenderer {
public EmptyValueListCellRenderer() {
}
public Component getListCellRendererComponent( final JList list,
final Object value,
final int index,
final boolean isSelected,
final boolean cellHasFocus ) {
if ( value == null || "".equals( value ) ) {
return super.getListCellRendererComponent( list, " ", index, isSelected, cellHasFocus );
}
return super.getListCellRendererComponent( list, value, index, isSelected, cellHasFocus );
}
}