ErrorLabel.java

/*!
 * 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.gwt.widgets.client.controls;

import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;
import org.pentaho.gwt.widgets.client.utils.StringUtils;

/**
 * @author Steven Barkdull
 * 
 */

@SuppressWarnings( "deprecation" )
public class ErrorLabel extends VerticalPanel {

  protected Label errorLabel = null;

  public ErrorLabel( Widget w ) {
    errorLabel = new Label();
    errorLabel.setStyleName( "errorLabel" ); //$NON-NLS-1$
    errorLabel.setVisible( false );
    add( errorLabel );

    add( w );
  }

  /**
   * Set an error message to be associated with the label
   * 
   * @param msg
   *          String if null, clear the error message, else set the error message to <param>mgs</param>.
   */
  public void setErrorMsg( String msg ) {
    if ( !StringUtils.isEmpty( msg ) ) {
      errorLabel.setText( msg );
      errorLabel.setVisible( true );
    } else {
      errorLabel.setText( "" ); //$NON-NLS-1$
      errorLabel.setVisible( false );
    }
  }
}