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Re: First JLIST, used with GUI Inventory

#21

Jul 26th, 2007

WOW, YOU could probably finish it in an hour!

It is going to take me an hour to sit here and think each one through invididually, and a week to impliment AFTER I figure out what is what.

Delete button I am not worried about at the moment, empty fields either. It is the toString(), currCD, listeners, and actions for my fields that have my head spinning.

I have to remark out the CurrentCD line to get it to run, but I know I need it in there for currCD to work. Once that works
I think I just need a line in my buttons to finish it up, currCD++ and currCD-- should be all that is required. If there is more to that please let me know, because everything else needs that to work before I can start it.
The real thing I want to accomplish today is Field Functionality, to make my calculations populate the fields correctly. I need currCD and a bunch of listeners and actions to do that, and I am not sure about how to do those yet.
Display and toString() would come last. Ezzarral showed me some of that last week, but I am still quite shakey on it and cannot accomplish it without help.

I never drew first, but I drew first blood.
I'm no ones son, unforgiven.

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Posting Maven

Re: First JLIST, used with GUI Inventory

#22

Jul 26th, 2007

•

I have to remark out the CurrentCD line to get it to run, but I know I need it in there for currCD to work.

No, if you stick with currCD and access the cd object with listModel.get(currCD), you do not need currentCD necessarily. It's just a convenience reference and is probably just confusing you.

•

Display and toString() would come last.

I thought you already put a toString() method on your CdwArtist class? There was discussion about an item number and line breaks but I thought you had that part in there. You don't really need to get all that fancy on the toString() representation of the object in the list.

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Re: First JLIST, used with GUI Inventory

#23

Jul 26th, 2007

You are right about the toString(), and I can leave it like that for now, I will lose points because I only want to display one at a time, small problem.
For the currCd, I though for sure I understood what you were saying. I re-coded it, as so:

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

public class Inventory2 extends JFrame
{
	private JLabel cdNameLabel; // name label 
	private JLabel artistLabel; // item number label 
	private JLabel nstockLabel; // units in stock label 
	private JLabel priceLabel; // price each label 
	private JLabel itemLabel; // item number label 
	private JLabel valueLabel; // value of that item label 
	private JLabel rstkLabel; // cost to restock label 
	private JLabel totalLabel; // total value of inventory label 
	private JTextField cdNameField; // name display 
	private JTextField artistField; // artist display 
	private JFormattedTextField nstockField; // units in stock display 
	private JFormattedTextField priceField; // price each display 
	private JTextField itemField; // item number display 
	private JFormattedTextField valueField; // value of that item display 
	private JFormattedTextField rstkField; // cost to restock display
	private JFormattedTextField totalField; // value of all inventory combine 
	private NumberFormat nstockFormat; // format field and parse numbers 
	private NumberFormat priceFormat; // format field and parse numbers 
	private NumberFormat valueFormat; // format field and parse numbers 
	private NumberFormat rstkFormat; // format field and parse numbers 
	private NumberFormat totalFormat;
	private JButton btnAdd; // first button 
	private JButton btnPrev; // previous button 
	private JButton btnNext; // next button 
	private JButton btnDel; // last button 
	private JPanel buttonJPanel; // JPanle to hold buttons 
	private JPanel fieldJPanel; // JPanel to hold labels and displays 
	private JPanel fontJPanel; // JPanel to display logo 
	private int currCD; 
//	private int currentCD;  
	private double total = 0; // variable for total inventory 
	private JList Inventorylist; // JList to take place of old array
	private DefaultListModel listModel;
	private JScrollPane jScrollPanel;  

	public Inventory2() // create class and method to perform GUI build 
	{ 
		initComponents(); 
	} 

	private void initComponents() 
	{ 
		// create label names 
		cdNameLabel = new JLabel("CD Name:"); 
		artistLabel = new JLabel("Artist:");
		nstockLabel = new JLabel("In Stock:"); 
		priceLabel = new JLabel("Each Item Cost:$"); 
		itemLabel = new JLabel("Item Number:"); 
		valueLabel = new JLabel("Value of Item Inventory:$"); 
		rstkLabel = new JLabel("Cost to Re-Stock Item:$"); 
		totalLabel = new JLabel("Total Value of Inventory:$"); 
		
		// initial fields
		cdNameField = new JTextField(25);
		cdNameField.setEditable(true);
		artistField = new JTextField(15);
		artistField.setEditable(true);
		nstockField = new JFormattedTextField(nstockFormat);
		nstockField.setEditable(true);
		nstockField.setColumns(10);
		priceField = new JFormattedTextField(priceFormat);
		priceField.setEditable(true);
		priceField.setColumns(10);
		itemField = new JTextField(5);
		itemField.setEditable(true);
		valueField = new JFormattedTextField(valueFormat);
		valueField.setEditable(true);
		valueField.setColumns(10);
		rstkField = new JFormattedTextField(rstkFormat);
		rstkField.setEditable(true);
		rstkField.setColumns(5);
		totalField = new JFormattedTextField(totalFormat);
		totalField.setColumns (10);
		totalField.setEditable(true);
				
		// JList
		jScrollPanel = new JScrollPane();
		Inventorylist = new JList(); 
		
		//Instantiate object for JList
	//	CdwArtist currentCD = (CdwArtist) listModel.get( currCD );
		currCD = 0;
		
		
	   // add values to textFields
	//	cdNameField.setText(currentCD.getcdName());
	//	artistField.setText(currentCD.getArtist()); 
	//	nstockField.setValue(new Float(currentCD.getValue()));
	//	priceField.setValue(new Float("$"+curentrCD.getPrice()));
	//	itemField.setText(currCD.getItem());
	//	valueField.setValue(new Float("$" + currentCD.getValue()));
	//	rstkField.setValue(new Float(currentCD.getRestock()));
	//	totalField.setValue(new Float("$" + currentCD.getValue()));
		
		
		// buttons 
		btnAdd = new JButton(); 
		btnNext = new JButton(); 
		btnPrev = new JButton(); 
		btnDel = new JButton(); 
		
		getContentPane().setLayout(new FlowLayout());
		
		setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

		// place textFields and labels
		
		//artist
		artistLabel.setText("Artist"); 
		getContentPane().add(artistLabel); 

		artistField.setMinimumSize(new Dimension(75,19)); 
		artistField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(artistField); 
		
		// cd name
		cdNameLabel.setText("CD Name"); 
		getContentPane().add(cdNameLabel); 

		cdNameField.setMinimumSize(new Dimension(75,19)); 
		cdNameField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(cdNameField);
		
		// copies in stock
		nstockLabel.setText("Copies In Stock"); 
		getContentPane().add(nstockLabel); 

		nstockField.setMinimumSize(new Dimension(75,19)); 
		nstockField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(nstockField); 
		
		//price of cd
		priceLabel.setText("Price"); 
		getContentPane().add(priceLabel); 

		priceField.setMinimumSize(new Dimension(75,19)); 
		priceField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(priceField); 
		
		//item number of cd
		itemLabel.setText("Item Number"); 
		getContentPane().add(itemLabel); 

		itemField.setMinimumSize(new Dimension(75,19)); 
		itemField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(itemField);; 
		
		// value of individual cd in stock
		valueLabel.setText("Value"); 
		getContentPane().add(valueLabel); 

		valueField.setMinimumSize(new Dimension(75,19)); 
		valueField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(valueField); 
		
		// restocking fee
		rstkLabel.setText("Restock Fee"); 
		getContentPane().add(rstkLabel); 

		rstkField.setMinimumSize(new Dimension(75,19)); 
		rstkField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(rstkField);
		
		// total value of inventory
		totalLabel.setText("Total Inventory Value"); 
		getContentPane().add(totalLabel); 

		totalField.setMinimumSize(new Dimension(75,19)); 
		totalField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(totalField);	
		
		
		//ADD listeners
		
		// listener to perform calc upon leaving the price field
		priceField.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
			valueField.setValue( ((CdwArtist) listModel.get( currCD )).getValue() );

			}
		});
		
		btnAdd.setText("Add");
		btnAdd.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
				btnAddActionPerformed(evt);
			}
		});
		getContentPane().add(btnAdd);
		 
		// PREVIOUS
		btnPrev.setText("Previous");
		btnPrev.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
				btnAddActionPerformed(evt);
			}
		});
		getContentPane().add(btnPrev);
		
		// NEXT
		btnNext.setText("Next");		btnNext.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
				btnAddActionPerformed(evt);
			}
		});
		getContentPane().add(btnNext);
				
		// DELETE
		btnDel.setText("Delete");
		btnDel.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
				btnAddActionPerformed(evt);
			}
		});
		getContentPane().add(btnDel);
		
		// new Jlist model
		listModel = new DefaultListModel();
		Inventorylist.setModel(listModel);
		
		jScrollPanel.setViewportView(Inventorylist);
		
		getContentPane().add(jScrollPanel);
		
		pack();
	}// close
	
			
		private void btnAddActionPerformed(ActionEvent evt)
		{
			// Create cd to add
			currCD++;
			artistField.getText(currCD.getArtist());
			cdNameField.getText(currCD.getcdName());	
			Integer.parseInt(itemField.getText(currCD.getitemno()));
			Integer.parseInt(nstockField.getText(currCD.getNstock()));
			Float.parseFloat(priceField.getText(currCD.getPrice()));
			Float.parseFloat(valueField.getText(currCD.getValue()));
			Float.parseFloat(totalField.getText(currCD.getTotal()));
			Float.parseFloat(rstkField.getText(currCD.getrestock()));	
			
			// Add cd to list
			
			
			listModel.addElement(currCD);
			
			// Clear the text fields after add
			artistField.setText(null);
			cdNameField.setText(null);	
			itemField.setText(null);
			nstockField.setText(null);
         priceField.setText(null);
			valueField.setText(null);
			rstkField.setText(null);
			totalField.setText(null);
		}// end ADD
		
			
		// run it
		public static void main(String args[])
		{
		java.awt.EventQueue.invokeLater(new Runnable()
			{
			public void run()
				{
				new Inventory2().setVisible(true);
				}
			});
		}
			
} // close class

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

public class Inventory2 extends JFrame
{
	private JLabel cdNameLabel; // name label 
	private JLabel artistLabel; // item number label 
	private JLabel nstockLabel; // units in stock label 
	private JLabel priceLabel; // price each label 
	private JLabel itemLabel; // item number label 
	private JLabel valueLabel; // value of that item label 
	private JLabel rstkLabel; // cost to restock label 
	private JLabel totalLabel; // total value of inventory label 
	private JTextField cdNameField; // name display 
	private JTextField artistField; // artist display 
	private JFormattedTextField nstockField; // units in stock display 
	private JFormattedTextField priceField; // price each display 
	private JTextField itemField; // item number display 
	private JFormattedTextField valueField; // value of that item display 
	private JFormattedTextField rstkField; // cost to restock display
	private JFormattedTextField totalField; // value of all inventory combine 
	private NumberFormat nstockFormat; // format field and parse numbers 
	private NumberFormat priceFormat; // format field and parse numbers 
	private NumberFormat valueFormat; // format field and parse numbers 
	private NumberFormat rstkFormat; // format field and parse numbers 
	private NumberFormat totalFormat;
	private JButton btnAdd; // first button 
	private JButton btnPrev; // previous button 
	private JButton btnNext; // next button 
	private JButton btnDel; // last button 
	private JPanel buttonJPanel; // JPanle to hold buttons 
	private JPanel fieldJPanel; // JPanel to hold labels and displays 
	private JPanel fontJPanel; // JPanel to display logo 
	private int currCD; 
//	private int currentCD;  
	private double total = 0; // variable for total inventory 
	private JList Inventorylist; // JList to take place of old array
	private DefaultListModel listModel;
	private JScrollPane jScrollPanel;  

	public Inventory2() // create class and method to perform GUI build 
	{ 
		initComponents(); 
	} 

	private void initComponents() 
	{ 
		// create label names 
		cdNameLabel = new JLabel("CD Name:"); 
		artistLabel = new JLabel("Artist:");
		nstockLabel = new JLabel("In Stock:"); 
		priceLabel = new JLabel("Each Item Cost:$"); 
		itemLabel = new JLabel("Item Number:"); 
		valueLabel = new JLabel("Value of Item Inventory:$"); 
		rstkLabel = new JLabel("Cost to Re-Stock Item:$"); 
		totalLabel = new JLabel("Total Value of Inventory:$"); 
		
		// initial fields
		cdNameField = new JTextField(25);
		cdNameField.setEditable(true);
		artistField = new JTextField(15);
		artistField.setEditable(true);
		nstockField = new JFormattedTextField(nstockFormat);
		nstockField.setEditable(true);
		nstockField.setColumns(10);
		priceField = new JFormattedTextField(priceFormat);
		priceField.setEditable(true);
		priceField.setColumns(10);
		itemField = new JTextField(5);
		itemField.setEditable(true);
		valueField = new JFormattedTextField(valueFormat);
		valueField.setEditable(true);
		valueField.setColumns(10);
		rstkField = new JFormattedTextField(rstkFormat);
		rstkField.setEditable(true);
		rstkField.setColumns(5);
		totalField = new JFormattedTextField(totalFormat);
		totalField.setColumns (10);
		totalField.setEditable(true);
				
		// JList
		jScrollPanel = new JScrollPane();
		Inventorylist = new JList(); 
		
		//Instantiate object for JList
	//	CdwArtist currentCD = (CdwArtist) listModel.get( currCD );
		currCD = 0;
		
		
	   // add values to textFields
	//	cdNameField.setText(currentCD.getcdName());
	//	artistField.setText(currentCD.getArtist()); 
	//	nstockField.setValue(new Float(currentCD.getValue()));
	//	priceField.setValue(new Float("$"+curentrCD.getPrice()));
	//	itemField.setText(currCD.getItem());
	//	valueField.setValue(new Float("$" + currentCD.getValue()));
	//	rstkField.setValue(new Float(currentCD.getRestock()));
	//	totalField.setValue(new Float("$" + currentCD.getValue()));
		
		
		// buttons 
		btnAdd = new JButton(); 
		btnNext = new JButton(); 
		btnPrev = new JButton(); 
		btnDel = new JButton(); 
		
		getContentPane().setLayout(new FlowLayout());
		
		setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

		// place textFields and labels
		
		//artist
		artistLabel.setText("Artist"); 
		getContentPane().add(artistLabel); 

		artistField.setMinimumSize(new Dimension(75,19)); 
		artistField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(artistField); 
		
		// cd name
		cdNameLabel.setText("CD Name"); 
		getContentPane().add(cdNameLabel); 

		cdNameField.setMinimumSize(new Dimension(75,19)); 
		cdNameField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(cdNameField);
		
		// copies in stock
		nstockLabel.setText("Copies In Stock"); 
		getContentPane().add(nstockLabel); 

		nstockField.setMinimumSize(new Dimension(75,19)); 
		nstockField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(nstockField); 
		
		//price of cd
		priceLabel.setText("Price"); 
		getContentPane().add(priceLabel); 

		priceField.setMinimumSize(new Dimension(75,19)); 
		priceField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(priceField); 
		
		//item number of cd
		itemLabel.setText("Item Number"); 
		getContentPane().add(itemLabel); 

		itemField.setMinimumSize(new Dimension(75,19)); 
		itemField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(itemField);; 
		
		// value of individual cd in stock
		valueLabel.setText("Value"); 
		getContentPane().add(valueLabel); 

		valueField.setMinimumSize(new Dimension(75,19)); 
		valueField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(valueField); 
		
		// restocking fee
		rstkLabel.setText("Restock Fee"); 
		getContentPane().add(rstkLabel); 

		rstkField.setMinimumSize(new Dimension(75,19)); 
		rstkField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(rstkField);
		
		// total value of inventory
		totalLabel.setText("Total Inventory Value"); 
		getContentPane().add(totalLabel); 

		totalField.setMinimumSize(new Dimension(75,19)); 
		totalField.setPreferredSize(new Dimension(75,19));
		getContentPane().add(totalField);	
		
		
		//ADD listeners
		
		// listener to perform calc upon leaving the price field
		priceField.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
			valueField.setValue( ((CdwArtist) listModel.get( currCD )).getValue() );

			}
		});
		
		btnAdd.setText("Add");
		btnAdd.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
				btnAddActionPerformed(evt);
			}
		});
		getContentPane().add(btnAdd);
		 
		// PREVIOUS
		btnPrev.setText("Previous");
		btnPrev.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
				btnAddActionPerformed(evt);
			}
		});
		getContentPane().add(btnPrev);
		
		// NEXT
		btnNext.setText("Next");		btnNext.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
				btnAddActionPerformed(evt);
			}
		});
		getContentPane().add(btnNext);
				
		// DELETE
		btnDel.setText("Delete");
		btnDel.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
				btnAddActionPerformed(evt);
			}
		});
		getContentPane().add(btnDel);
		
		// new Jlist model
		listModel = new DefaultListModel();
		Inventorylist.setModel(listModel);
		
		jScrollPanel.setViewportView(Inventorylist);
		
		getContentPane().add(jScrollPanel);
		
		pack();
	}// close
	
			
		private void btnAddActionPerformed(ActionEvent evt)
		{
			// Create cd to add
			currCD++;
			artistField.getText(currCD.getArtist());
			cdNameField.getText(currCD.getcdName());	
			Integer.parseInt(itemField.getText(currCD.getitemno()));
			Integer.parseInt(nstockField.getText(currCD.getNstock()));
			Float.parseFloat(priceField.getText(currCD.getPrice()));
			Float.parseFloat(valueField.getText(currCD.getValue()));
			Float.parseFloat(totalField.getText(currCD.getTotal()));
			Float.parseFloat(rstkField.getText(currCD.getrestock()));	
			
			// Add cd to list
			
			
			listModel.addElement(currCD);
			
			// Clear the text fields after add
			artistField.setText(null);
			cdNameField.setText(null);	
			itemField.setText(null);
			nstockField.setText(null);
         priceField.setText(null);
			valueField.setText(null);
			rstkField.setText(null);
			totalField.setText(null);
		}// end ADD
		
			
		// run it
		public static void main(String args[])
		{
		java.awt.EventQueue.invokeLater(new Runnable()
			{
			public void run()
				{
				new Inventory2().setVisible(true);
				}
			});
		}
			
} // close class

but I get those same errors as yesterday that led us off down the other road. I do not know what these mean.
Inventory2.java:253: int cannot be dereferenced
artistField.getText(currCD.getArtist());
^
Inventory2.java:254: int cannot be dereferenced
cdNameField.getText(currCD.getName());
^
Inventory2.java:255: int cannot be dereferenced
Integer.parseInt(itemField.getText(currCD.getitemno()))

I appreciate your perserverance with me. I will not quit as long as you do not. :o)

I am also coding my backup plan at the same time though in case we just decide this one is above me.

I never drew first, but I drew first blood.
I'm no ones son, unforgiven.

•

Join Date: May 2007

Location: USA

Posts: 2,825

Reputation: Ezzaral is a name known to all

Rep Power: 12

Solved Threads: 282

Ezzaral

Online

Posting Maven

Re: First JLIST, used with GUI Inventory

#24

Jul 26th, 2007

        private void btnAddActionPerformed(ActionEvent evt)
        {
            // Create cd to add
            currCD++;
            artistField.getText(currCD.getArtist());
            cdNameField.getText(currCD.getcdName());    
            Integer.parseInt(itemField.getText(currCD.getitemno()));
            Integer.parseInt(nstockField.getText(currCD.getNstock()));
            Float.parseFloat(priceField.getText(currCD.getPrice()));
            Float.parseFloat(valueField.getText(currCD.getValue()));
            Float.parseFloat(totalField.getText(currCD.getTotal()));
            Float.parseFloat(rstkField.getText(currCD.getrestock()));    
            
            // Add cd to list
            
            
            listModel.addElement(currCD);

Ok, I see. That was not the "currentCD" reference I was talking about. I meant a persistent one that you kept at the class level.
You do need to create a CdwArtist object there to add it to the list. Perhaps we should just call that "newCD" to avoid confusion. Also, since the index is 0 based, it would be easier to initialize currCD with a value of -1 when you declare it, so your add code would be:

        private void btnAddActionPerformed(ActionEvent evt)
        {
            // Create cd to add
            CdwArtist newCD = new CdwArtist();
            newCD.setArtist(artistField.getText());
            newCD.setCdName(cdNameField.getText());    
            newCD.setItemNo(Integer.parseInt(itemField.getText());
            
                        <snip other sets>

            // Add cd to list
            listModel.addElement(newCD);
            currCD = listModel.size()-1;    // set currCD to the index that was added

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Junior Poster

Re: First JLIST, used with GUI Inventory

#25

Jul 26th, 2007

That is a little clearer.
Do I leave the other one in also?
//CdwArtist currentCD = (CdwArtist) listModel.get( currCD );

Both ways I try it the other messages have gone - whew - and the only thing I am left with is
cannot find symbol on currCD here:
currCd = listModel.size()-1;

I thought maybe the -1 needed to be inside the paranthesis, but the message stayed the same so I put it back where you had it.

How can currCD work everywhere but here? <scratching head>

I never drew first, but I drew first blood.
I'm no ones son, unforgiven.

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Join Date: May 2007

Location: USA

Posts: 2,825

Reputation: Ezzaral is a name known to all

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Ezzaral

Online

Posting Maven

Re: First JLIST, used with GUI Inventory

#26

Jul 26th, 2007

You have "currCd" - your variable is "currCD". Case matters.

You don't need the //CdwArtist currentCD = (CdwArtist) listModel.get( currCD ); line in there for anything.

Last edited by Ezzaral : Jul 26th, 2007 at 4:05 pm.

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Junior Poster

Re: First JLIST, used with GUI Inventory

#27

Jul 26th, 2007

I hate it when I am stupid. I looked for just that.

I would now expect my listener to work now that currCD is working, but it does not. It stays blank until I enter something manually.
I wrote this yesterday as a template before all this, so that if we got it working I could lay down ones for the other fields.
Am I missing something else?

	// listener to perform calc upon leaving the price field
		priceField.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent evt)
			{
			valueField.setValue( ((CdwArtist) listModel.get( currCD )).getValue() );

			}
		});

I never drew first, but I drew first blood.
I'm no ones son, unforgiven.

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Re: First JLIST, used with GUI Inventory

#28

Jul 26th, 2007

ActionPerformed will only get triggered by hitting enter in the text field with the listener. Even if triggers though, you will not get the value from a new CD that you are entering, because it is not yet in the list model until you click "add". Instead, what will be set in the field will be the value of the last CD (the one that currCD points to). To alleviate that you would have to either calc the price from text fields that you do have, or have the "Add" button create a new blank CD to work with and put in a Save button that added it to the list model.

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