org.apache.excalibur.instrument.client.StatusBar Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of excalibur-instrument-client Show documentation

Excalibur Instrument is an instrumentation utility that allows you to attach a separate JVM to your running application to determine its health. Instrumentation is the process of exposing the internal state in a way that is easy for an administrator or help desk personell to digest. Excalibur Instrumentation is such a package that you can use for your Avalon based projects.

The newest version!

/* 
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed  under the  License is distributed on an "AS IS" BASIS,
 * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY KIND, either  express  or
 * implied.
 * 
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.excalibur.instrument.client;

import java.awt.BorderLayout;

import javax.swing.JLabel;
import javax.swing.JPanel;

/**
 * This class defines the status bar at the bottom of the main frame.
 *  It is used to display information to the user.
 *
 * @author Avalon Development Team
 * @version CVS $Revision: 1.4 $ $Date: 2004/02/28 11:47:23 $
 * @since 4.1
 */
class StatusBar extends JPanel
{
    private JLabel m_statusLabel;
    
    /*---------------------------------------------------------------
     * Constructors
     *-------------------------------------------------------------*/
    StatusBar()
    {
        setLayout( new BorderLayout() );
        m_statusLabel = new JLabel( " " );
        add( m_statusLabel, BorderLayout.CENTER );
    }
    
    /*---------------------------------------------------------------
     * Methods
     *-------------------------------------------------------------*/
    void setStatusMessage( String message )
    {
        // If the message is of 0 length, then the status bar will collapse.
        if ( ( message == null ) || ( message.length() < 1 ) )
        {
            message = " ";
        }
        
        if ( !message.equals( m_statusLabel.getText() ) )
        {
            m_statusLabel.setText( message );
            m_statusLabel.invalidate();
            validate();
        }
    }
}