import java.awt.*;
import java.awt.event.*;
import java.io.*;
import ij.plugin.frame.*;
import ij.*;
import ij.process.*;
import ij.gui.*;

/**
 *The Two_D_Manipulation class uses much of the same code in IP_Demo.java 
 *written by Wayne Rasband and can be found under the ImageJ website at 
 *http://rsbweb.nih.gov/ij/plugins/ip-demo.html. This versioon however modifies 
 *some of the parameters in the panel and has a new button that allows six 
 *stacks to be combined into one. 
 *
 *@author Chris Tsang & Gurinder Kler
 *@version 1.0	
 */
 
public class Two_D_Manipulation extends PlugInFrame implements ActionListener {

	Panel panel;
	int previousID;
	static Frame instance;

	public Two_D_Manipulation() {
		super("Two D Manipulations");
		if (instance!=null) {
			instance.toFront();
			return;
		}
		instance = this;
		IJ.register(Two_D_Manipulation.class);

		setLayout(new FlowLayout());
		panel = new Panel();
		panel.setLayout(new GridLayout(4, 4, 5, 5));
		
		addButton("Reset");
		addButton("Histogram");
		addButton("Invert");
		addButton("Rotate");
		addButton("Lighten");
		addButton("Darken");
		addButton("Zoom In");
		addButton("Zoom Out");
		addButton("Smooth");
		addButton("Sharpen");
		addButton("Find Edges");
		addButton("Add Noise");
		addButton("Reduce Noise");
		addButton("Start Animation");
		addButton("Stop Animation");
		addButton("Combine Stacks");
		addButton("Create 3D");
		add(panel);
		
		pack();
		show();
	}
	
	void addButton(String label) {
		Button b = new Button(label);
		b.addActionListener(this);
		panel.add(b);
	}

	public void actionPerformed(ActionEvent e) {
		ImagePlus imp = WindowManager.getCurrentImage();
		if (imp==null) {
			IJ.beep();
			IJ.showStatus("No image");
			previousID = 0;
			return;
		}
		if (!imp.lock())
			{previousID = 0; return;}
		ImageProcessor ip = imp.getProcessor();
		int id = imp.getID();
		if (id!=previousID)
			ip.snapshot();
		previousID = id;
		String label = e.getActionCommand();
		if (label==null)
			return;
		new Runner(label, imp, ip);
	}

	public void processWindowEvent(WindowEvent e) {
		super.processWindowEvent(e);
		if (e.getID()==WindowEvent.WINDOW_CLOSING) {
			instance = null;	
		}
	}

}

class Runner extends Thread {
	private String command;
	private ImagePlus imp;
	private ImageProcessor ip;

	Runner(String command, ImagePlus imp, ImageProcessor ip) {
		super(command);
		this.command = command;
		this.imp = imp;
		this.ip = ip;
		setPriority(Math.max(getPriority()-2, MIN_PRIORITY));
		start();
	}

	public void run() {
		try {runCommand(command, imp, ip);}
		catch(OutOfMemoryError e) {
			IJ.outOfMemory(command);
			if (imp!=null) imp.unlock();
		} catch(Exception e) {
			CharArrayWriter caw = new CharArrayWriter();
			PrintWriter pw = new PrintWriter(caw);
			e.printStackTrace(pw);
			IJ.write(caw.toString());
			IJ.showStatus("");
			if (imp!=null) imp.unlock();
		}
	}

	void runCommand(String command, ImagePlus imp, ImageProcessor ip) {
		IJ.showStatus(command + "...");
		if (command.equals("Reset"))
			ip.reset();
		
		else if(command.equals("Histogram"))
			{
			imp.unlock();
			IJ.run("Histogram");
			}
		else if (command.equals("Invert"))
			ip.invert();
		else if (command.equals("Lighten")) {
			if (imp.isInvertedLut())
				ip.multiply(0.9);
			else
				ip.multiply(1.1);
		}
		else if (command.equals("Darken")) {
			if (imp.isInvertedLut())
				ip.multiply(1.1);
			else
				ip.multiply(0.9);
		}
		else if (command.equals("Rotate"))
			ip.rotate(90);
		else if (command.equals("Zoom In"))
			ip.scale(1.2, 1.2);
		else if (command.equals("Zoom Out"))
			ip.scale(.8, .8);
		//else if (command.equals("Threshsold"))
			//ip.autoThreshold();
		else if (command.equals("Smooth"))
			ip.smooth();
		else if (command.equals("Sharpen"))
			ip.sharpen();
		else if (command.equals("Find Edges"))
			ip.findEdges();
		else if (command.equals("Add Noise"))
			ip.noise(20);
		else if (command.equals("Reduce Noise"))
			ip.medianFilter();
		else if (command.equals("Combine Stacks"))
			IJ.runPlugIn("Combine_Stacks","Combine Stacks");
		else if (command.equals("Start Animation"))
			IJ.doCommand("Start Animation [=]");
		else if(command.equals("Stop Animation"))
			IJ.doCommand("Stop Animation");
		else if(command.equals("Create 3D"))
			IJ.showMessage("Gurinder Kler!!!!! How come it doesn't work??");
		Roi roi = imp.getRoi();
		if (roi!=null) {
			int[] mask = roi.getMask();
			if (mask!=null)
				ip.reset(mask);
		}
		imp.updateAndDraw();
		imp.unlock();
		IJ.showStatus("");
	}



}