// $Header: /home/cvs/jakarta-jmeter/src/monitor/components/org/apache/jmeter/visualizers/MonitorHealthVisualizer.java,v 1.6 2004/03/18 03:02:08 woolfel Exp $
/*
 * Copyright 2004 The Apache Software Foundation.
 *
 * Licensed 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.jmeter.visualizers;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.Image;

import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;

import org.apache.jmeter.gui.util.VerticalPanel;
import org.apache.jmeter.reporters.ResultCollector;
import org.apache.jmeter.testelement.TestElement;

import org.apache.jmeter.samplers.Clearable;
import org.apache.jmeter.samplers.SampleResult;
import org.apache.jmeter.util.JMeterUtils;
import org.apache.jmeter.visualizers.gui.AbstractVisualizer;

/**
 * For performance reasons, I am using tabs for the
 * visualizers. Since a visualizer is heavy weight,
 * I don not want to have two separate result
 * collectors rather the same information. Instead,
 * I would rather have the visualizer be the
 * container for the data and simply pass the data
 * to child JComponents. In the future, we may want
 * to add email alerts as a third tab.
 */
public class MonitorHealthVisualizer extends AbstractVisualizer
	implements ImageVisualizer, ItemListener, GraphListener, Clearable
{
	private MonitorTabPane TABPANE;
	private MonitorHealthPanel HEALTHPANE;
	private MonitorPerformancePanel PERFPANE;
	private MonitorAccumModel MODEL;
	private MonitorGraph GRAPH;
	
	public static final String BUFFER = "monitor.buffer.size";
	
    /**
     * Constructor for the GraphVisualizer object.
     */
    public MonitorHealthVisualizer()
    {
    	MODEL = new MonitorAccumModel();
    	GRAPH = new MonitorGraph(MODEL);
    	init();
		MODEL.setBufferSize(JMeterUtils.getPropDefault(BUFFER,800));
    }

    public String getLabelResource()
    {
        return "monitor_health_title";
    }

	/**
	 * Because of the unique requirements of a monitor
	 * We have to handle the results differently than
	 * normal GUI components. A monitor should be able
	 * to run for a very long time without eating up
	 * all the memory.
	 */
	public void add(SampleResult res)
	{
		MODEL.addSample(res);
	}
	
	public Image getImage()
	{
		Image result = GRAPH.createImage(this.getWidth(),this.getHeight());
		Graphics image = result.getGraphics();
		GRAPH.paintComponent(image);
		return result;
	}

	public void itemStateChanged(ItemEvent e)
	{
	}
	
	public synchronized void updateGui()
	{
		this.repaint();
	}

	public synchronized void updateGui(Sample s)
	{
		this.repaint();
	}

	/**
	 * Initialize the GUI.
	 */
	private void init()
	{
		this.setLayout(new BorderLayout());

		// MAIN PANEL
		Border margin = new EmptyBorder(10, 10, 5, 10);
		this.setBorder(margin);
		
		// Add the main panel and the graph
		this.add(this.makeTitlePanel(), BorderLayout.NORTH);
		this.createTabs();
	}
	
	protected void createTabs(){
		TABPANE = new MonitorTabPane();
		createHealthPane(TABPANE);
		createPerformancePane(TABPANE);
		this.add(TABPANE, BorderLayout.CENTER);
	}

	/**
	 * Create the JPanel
	 * @param pane
	 */	
	public void createHealthPane(MonitorTabPane pane){
		HEALTHPANE = new MonitorHealthPanel(MODEL);
		pane.addTab(JMeterUtils.getResString("monitor_health_tab_title"),
			HEALTHPANE);
	}

	/**
	 * Create the JSplitPane for the performance history
	 * @param pane
	 */	
	public void createPerformancePane(MonitorTabPane pane){
		PERFPANE = new MonitorPerformancePanel(MODEL,GRAPH);
		pane.addTab(JMeterUtils.getResString("monitor_performance_tab_title"),
			PERFPANE);
	}
	
	protected Container makeTitlePanel()
	{
		VerticalPanel titlePanel = new VerticalPanel();
		titlePanel.add(createTitleLabel());
		titlePanel.add(getNamePanel());
		return titlePanel;
	}

	/**
	 * Clear will clear the MonitorAccumModel and create a
	 * new instance.
	 */
	public void clear(){
		this.MODEL.clear();
		this.HEALTHPANE.clear();
		this.PERFPANE.clear();
	}
	
	public TestElement createTestElement()
	{
		if (collector == null)
		{
			collector = new ResultCollector();
		}
		modifyTestElement(collector);
		return (TestElement) collector.clone();
	}
}