import java.lang.*;
import java.util.*;
import java.awt.*;
import java.io.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class distance extends operator1DInt{

  JTextField scaleText = new JTextField("1.0",5);
  JTextField offsetText = new JTextField("0.0",5);
  JButton applyButton = new JButton("Apply");

  Distance distanceOp = new Distance();
  static int number=0;
  String type = new String("Distance");

  public distance(){
  }

  public distance(JPanel panel, linkData links){
    ++number;
    setName(type+"_"+number);
    setParameters();
    setType(type);
    setBox(panel,links,1,1);
    box.getIn1().setText("BININ1");
  }

  /**
   * Loads the required parameters (number of iterations)
   * from the input stream, so the operator can be recreated in an 
   * identical state to when it was saved.
   * @param tokenizer the input stream split into tokens
   * @throws IOException if error occurs during token retrieval
   */
  public void loadParameters(StreamTokenizer tokenizer) throws IOException{

    //Grab the parameters
    int tokenType;
    tokenType = tokenizer.nextToken();
    double scaleValue = (double) tokenizer.nval;
    tokenType = tokenizer.nextToken();
    double offsetValue = (double) tokenizer.nval;

    //Get all parameters here
    scaleText.setText(String. valueOf(scaleValue));
    offsetText.setText(String. valueOf(offsetValue));

    //Repack the components in the interface
    parameters.pack();
    parameters.setVisible(false);
  }

  /**
   * Returns a String representing all the parameters for this operator
   * for the purpose of saving the system setup (and being able to load
   * it again at a future date).
   */
  public String saveParameters(){
    String saveData = new String();
    
    //Add any parameters to the string
    saveData = saveData + " " + scaleText.getText() + " " + offsetText.getText();
    return saveData;
  }
  
  void setParameters(){
    /**
     *This function is used to set up the parameters window. This window
     *should contain enough parameters to be able to run the operator
     *although parameters like scaling and offset are not required as there
     *is an operator already defined to do this. The interface components
     *should be added to the parameters frame. In this example a single panel
     *is created which is used to hold a label saying there are no paramters.
     *In general this will not be true of most operators.
     */
    parameters = new JFrame(name);
    panel = new JPanel();
    panel.add(new JLabel("Scale"));
    panel.add(scaleText);
    panel.add(new JLabel("Offset"));
    panel.add(offsetText);
    panel.add(applyButton);

    applyButton. addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
	go();
      }
    }); 

    parameters.getContentPane().add(panel);
    parameters.pack();
    parameters.setVisible(false);
  }

  public void go(){

    System.out.println(name);

    if(getInput1()!=null){
      System.out.println("Input Width 1 "+getInput1().getWidth());
      try {
        output1 = new image1DInt(
                input1.getWidth(),
                input1.getHeight(),
                imageConversions.binary2gs(
                    distanceOp.distance_image(
                        imageConversions.gs2binary(
                            input1.getValues(),
                            input1.getWidth(),
                            input1.getHeight()),
                        (new Double(scaleText.getText()).doubleValue()),
                        (new Double(offsetText.getText()).doubleValue()))));
      }
      catch(NumberFormatException e){
        //The scale or offset values aren't valid so pop up a window
        JOptionPane.showMessageDialog(null,("Invalid scale or offset"),
				    ("Error!"), JOptionPane.WARNING_MESSAGE);
        return;
      }
      System.out.println("Output width "+getOutput1().getWidth());
      propagate();
    }
  }
}