ToTGUI

package gw2.tot;

import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;

public class ToTGUI
{
    ToTDrops records ;
    JButton button, button2 ;
    JFrame frame ;
    JLabel item, number, errorDisplay ;
    JTextField itemTxt, numberTxt ;
    final static boolean shouldFill = true;
    final static boolean shouldWeightX = true;
    final static boolean RIGHT_TO_LEFT = false;

    public ToTGUI()
    {
        records = new ToTDrops() ;

        frame = new JFrame("Trick or treat bag drops") ;
        frame.setSize(500,300) ;
        frame.setLayout(new GridBagLayout()) ;
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE) ;
        frame.setVisible(true) ;

        //declare and initialise constraints object
        GridBagConstraints c = new GridBagConstraints();
        if (shouldFill) {
            //natural height, maximum width
            c.fill = GridBagConstraints.HORIZONTAL;
            }


        item = new JLabel("Enter the item that you got from the bag(s):") ;
        //constraints for item
        if (shouldWeightX) {
            c.weightx = 0.5;
            }
            c.gridx = 0;
            c.gridy = 0;
            frame.add(item, c);

        itemTxt = new JTextField("") ;
        itemTxt.setPreferredSize(new Dimension(100,20)) ;
        //constraints for itemTxt
        if (shouldWeightX) {
            c.weightx = 0.5;
            }
            c.gridx = 1;
            c.gridy = 0;
            frame.add(itemTxt, c);
        number = new JLabel("Enter the amount obtained") ;
        if (shouldWeightX) {
            c.weightx = 0.5;
            }
            c.gridx = 0;
            c.gridy = 1;
            frame.add(number, c);
        numberTxt = new JTextField("") ;
        numberTxt.setPreferredSize(new Dimension(100,20)) ;
        if (shouldWeightX) {
            c.weightx = 0.5;
            }
            c.gridx = 1;
            c.gridy = 1;
            frame.add(numberTxt, c);
        button = new JButton("Add item(s)") ;
        button.addActionListener(new AddButtonListener(this)) ;
        if (shouldWeightX) {
            c.weightx = 1;
            }
            c.gridx = 0;
            c.gridy = 2;
            frame.add(button, c);
        button2 = new JButton("Subtract item(s)") ;
        button2.addActionListener(new SubtractButtonListener(this)) ;
        if (shouldWeightX) {
            c.weightx = 1;
            }
            c.gridx = 0;
            c.gridy = 3;
            frame.add(button2, c);
        errorDisplay = new JLabel("") ;
        errorDisplay.setPreferredSize(new Dimension(frame.getWidth(),20)) ;
        if (shouldWeightX) {
            c.weightx = 1;
            }
            c.gridx = 0;
            c.gridy = 4;
            frame.add(errorDisplay, c);

        frame.pack() ; //pack the frame
        frame.setResizable(false) ;
    }

    public static void main(String[] args)
    {
        ToTGUI gui = new ToTGUI() ;
    }
}

class AddButtonListener implements ActionListener
{
    private ToTGUI obj ;

    public AddButtonListener(ToTGUI obj)
    {
        this.obj = obj ;
    }

    public void actionPerformed(ActionEvent e)
    {
        try {
            obj.records.incrementTotal(obj.itemTxt.getText(),Integer.parseInt(obj.numberTxt.getText())) ;
            obj.records.generateEntryList() ;
        } catch (ItemNotFoundException ex) {
            obj.errorDisplay.setText(ex.getMessage()) ;
        } catch (NumberFormatException ex) {
            obj.errorDisplay.setText(ex.getMessage()) ;
        } catch (IllegalArgumentException ex) {
            obj.errorDisplay.setText(ex.getMessage()) ;
        }
        //System.out.println(obj.itemTxt.getText()) ;
        catch (Exception ex) {
            // TODO Auto-generated catch block
            ex.printStackTrace();
        }
    }
}

class SubtractButtonListener implements ActionListener
{
    private ToTGUI obj ;

    public SubtractButtonListener(ToTGUI obj)
    {
        this.obj = obj ;
    }

    public void actionPerformed(ActionEvent e)
    {
        try {
            obj.records.decrementTotal(obj.itemTxt.getText(),Integer.parseInt(obj.numberTxt.getText())) ;
            obj.records.generateEntryList() ;
        } catch(ItemNotFoundException ex) {
            obj.errorDisplay.setText(ex.getMessage()) ;
        } catch(NumberFormatException ex) {
            obj.errorDisplay.setText(ex.getMessage()) ;
        } catch (IllegalArgumentException ex) {
            obj.errorDisplay.setText(ex.getMessage()) ;
        } catch (Exception ex) {
            // TODO Auto-generated catch block
            ex.printStackTrace();
        }
    }
}