/**
 * --Copyright notice-- 
 *
 * Copyright (c) School of Geography, University of Leeds. 
 * http://www.geog.leeds.ac.uk/
 * This software is licensed under 'The Artistic License' which can be found at 
 * the Open Source Initiative website at... 
 * http://www.opensource.org/licenses/artistic-license.php
 * Please note that the optional Clause 8 does not apply to this code.
 *
 * The Standard Version source code, and associated documentation can be found at... 
 * [online] http://mass.leeds.ac.uk/
 * 
 *
 * --End of Copyright notice-- 
 *
 */

import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;

/**
* Main class for an generic data processing tool.<P>
* The tool has an Storage, containing raster data.<P>
* @version 1.0
* @author <A href="http://www.geog.leeds.ac.uk/people/a.evans/">Andy Evans</A>
*/
public class Analyst extends Frame implements ActionListener {

	
	/** Reader/writer. */
	private IO io = new IO();
	
	/** For drawing. */
	private Canvas c = new Canvas();
	
	/** For enabling. */
	MenuItem runMenuItem = new MenuItem("Run");
	
	/** For enabling. */
	MenuItem saveMenuItem = new MenuItem("Save Results...");
	
	/** Environment to store raster data. */
	private Storage store = new Storage();
	
	/** Environment to store raster data. */
	private Storage resultsStore = new Storage();

	
	/**
	* Analyst constructor. 
	*/
	public Analyst () {
	
		// Note how simple this is. We keep the complexity elsewhere 
		// so we can see the program flow here.

		buildGui();

	}
	
	
	
	
	/**
	* Builds the GUI.
	*/
	private void buildGui() {
	
		
		add(c);
	
		setSize(300,300);
		
		addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e){
				((Frame)e.getSource()).dispose();
				// System.exit(0);
			}
		});
		MenuBar menuBar = new MenuBar();
		Menu fileMenu = new Menu("File");
		menuBar.add(fileMenu);
		
		MenuItem openMenuItem = new MenuItem("Open...");
		fileMenu.add(openMenuItem);
		openMenuItem.addActionListener(this);
		
		
		fileMenu.add(saveMenuItem);
		saveMenuItem.addActionListener(this);
		saveMenuItem.setEnabled(false);
		
		Menu toolsMenu = new Menu("Tools");
		menuBar.add(toolsMenu);
		
		
		toolsMenu.add(runMenuItem);
		runMenuItem.addActionListener(this);
		runMenuItem.setEnabled(false);
		
		setMenuBar(menuBar);
		
		setLocation(
			(int)(Toolkit.getDefaultToolkit().getScreenSize().getWidth() / 2) - (getWidth() / 2), 
			(int)(Toolkit.getDefaultToolkit().getScreenSize().getHeight() / 2) - (getHeight() / 2)
		);
		
		setVisible(true);
		
	}
	
	
	
	/**
	* Paints data to the screen.
	* @param g Graphics context (actually draws on a canvas, so unused)
	*/
	public void paint(Graphics g) {
	
		Image image = store.getDataAsImage(); 
		Image results = resultsStore.getDataAsImage(); 
		Graphics cg = c.getGraphics();
		
		if (results != null) {
			cg.drawImage(results, 0, 0, this);
		} else {
			if (image != null) {
				cg.drawImage(image, 0, 0, this);
			}
		}
		
	}

	
	
	
	
	/**
	* Listens to menus.
	*/
	public void actionPerformed(ActionEvent e) {
	
		MenuItem clickedMenuItem = (MenuItem)e.getSource();
	
		if (clickedMenuItem.getLabel().equals("Open...")) {
			FileDialog fd = new FileDialog(this, "Open File", FileDialog.LOAD);
			fd.setVisible(true);
			File f = null;
			if((fd.getDirectory() != null)||( fd.getFile() != null)) {
				f = new File(fd.getDirectory() + fd.getFile());
				store.setData(io.readData(f));
				setSize(store.getWidth() +  getInsets().left +  getInsets().right, store.getHeight() +  getInsets().top +  getInsets().bottom);
			}
			runMenuItem.setEnabled(true);
		}
		
		if (clickedMenuItem.getLabel().equals("Save Results...")) {
			FileDialog fd = new FileDialog(this, "Save File", FileDialog.SAVE);
			fd.setVisible(true);
			File f = null;
			if((fd.getDirectory() != null)||( fd.getFile() != null)) {
				f = new File(fd.getDirectory() + fd.getFile());
				io.writeData(resultsStore.getData(), f);
			}
		}	
		
		if (clickedMenuItem.getLabel().equals("Run")) {
			Process p = new Process();
			double[][] results = p.runProcess(store.getData());
			resultsStore.setData(results);
			saveMenuItem.setEnabled(true);
		}
		
		repaint();
		
	}
	
	
	
	
	/**
	* Just calls the constructor.
	* @param args String sequence. Unused.
	*/
	public static void main (String args[]) {

		new Analyst();
		
	}


}