package Gui.Param;

import Obj.*;

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



public class LambdDlg extends JDialog {
    
    private int buttonHit; 
    
    private JTextField lambdField;
    private JCheckBox specBox;
    
    
    // Buttons
    private JButton okButton;
    private JButton cancelButton;
    private JButton defaultButton;
    
    // Data Members
    private float lambd = 1.0f;
    private boolean spec;
	
    // Data Model
    private NSimObj sim;	

    public LambdDlg(Component owner, NSimObj sim, boolean def){
	
	this.sim = sim;	

	JLabel l1 = new JLabel("Initial LAMBDA: ");
	
	lambdField = new JTextField(10);
	lambdField.setText("1.0");
	
	l1.setLabelFor(lambdField);
	

	ActionListener listener = new ActionListener(){
		public void actionPerformed(ActionEvent event){
		    if(event.getActionCommand().equals("Default")){
			reset();
			return;
		    }
		    
		    if(event.getActionCommand().equals("ok")){
		      if(!validateData())
			   return;
			buttonHit = JOptionPane.OK_OPTION;
		    }
		    if(event.getActionCommand().equals("cancel")){
			buttonHit = JOptionPane.CANCEL_OPTION;
			reset();
		    }
		    // disappear the current dialog box
		    setVisible(false);
		}
	    };
	
	
	//Create Buttons
	okButton = new JButton("   OK  ");
	okButton.setActionCommand("ok");
	okButton.addActionListener(listener);
	cancelButton = new JButton("Cancel ");      
	cancelButton.setActionCommand("cancel");
	cancelButton.addActionListener(listener);
	defaultButton = new JButton("Default");
	defaultButton.addActionListener(listener);
	

	specBox = new JCheckBox("  Infer a Separate LAMBDA for Each Population ");
	
	CheckBoxListener boxlistener = new CheckBoxListener();
	specBox.addItemListener(boxlistener);
	
	//Layout the labels in a panel.
	JPanel labelPane = new JPanel();
	labelPane.setLayout(new GridLayout(0, 1));
	labelPane.add(l1);
	
	JPanel fieldPane = new JPanel();
        fieldPane.setLayout(new GridLayout(0, 1));
	
	JPanel p1 =new JPanel();
	p1.add(lambdField);
        fieldPane.add(p1);
	
	//Layout the buttons in a panel
	JPanel buttonPane = new JPanel();
	buttonPane.add(cancelButton);
	buttonPane.add(defaultButton);
	buttonPane.add(okButton);
	
	JPanel contentPane = new JPanel();
        contentPane.setBorder(BorderFactory.createEmptyBorder(20, 20, 4, 20));
	GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints c = new GridBagConstraints();
        contentPane.setLayout(gridbag);

	c.fill = GridBagConstraints.BOTH;
	
	
	c.gridx = 0;
	c.gridy = 0;
	c.insets = new Insets(5,0,0,0);
	c.gridwidth = 1;	
	gridbag.setConstraints(labelPane, c);
	contentPane.add(labelPane);

	c.gridx = 1;
	c.gridy = 0;
	c.gridwidth = 1;
	gridbag.setConstraints(fieldPane, c);	
	contentPane.add(fieldPane);
	
	c.gridx = 0;
	c.gridy = 1;
	c.gridwidth = 2;
	c.insets = new Insets(20,0,0,0);
	gridbag.setConstraints(specBox, c);	
	contentPane.add(specBox);
	
	
	
	c.gridx = 0;
	c.gridy = 2;
	c.gridwidth = 2;
	c.insets = new Insets(25,20,20,20);
	gridbag.setConstraints(buttonPane, c);
        contentPane.add(buttonPane);
        setContentPane(contentPane);
	
	setLocationRelativeTo(owner);
	
	if(!sim.isNew() && !def ){
	    lambd = sim.LAMBDA;
	    spec  = sim.POPSPECIFICLAMBDA;
	    lambdField.setText(""+lambd);
	    specBox.setSelected(spec);
	}
    }
    
    public void reset(){

	lambdField.setText("1.0");
	lambd = 1.0f;
	specBox.setSelected(false);
	spec = false;
    }
	
	
    public int showDialog(){
	setModal(true);
	pack();
	super.show();
	return buttonHit;
    }
    
    public boolean validateData() {
       String errString = ""; 
   
       String tmp = lambdField.getText();
       try {
	     lambd = Float.parseFloat(tmp);
	 }catch (NumberFormatException e){
	     errString += new String("\nLAMBDA Must be a Real Number");
	 }
	
       if(errString.compareTo("")!=0){
	  String prefix = "Errors:\n";
	  errString = prefix.concat(errString);
	  errString += new String("\n\n");
	  JOptionPane.showMessageDialog(this,
					  errString,
					  "errors",
					  JOptionPane.ERROR_MESSAGE);
       return false;
    }

    return true;
  }	


  public void updateData(){
	sim.LAMBDA = lambd;
	sim.POPSPECIFICLAMBDA = spec;
  }

	
  class CheckBoxListener implements ItemListener {
	public void itemStateChanged(ItemEvent e) {
	    
	    Object source = e.getItemSelectable();	    
	    int index;
	    boolean val= true;
	    
	    if (e.getStateChange() == ItemEvent.DESELECTED)
		val = false;
	    
	    if (source == specBox){
		spec = val;
	    }
	   
	}
    }
	
}