/*
 * ViewZor.java
 *
 * Created on 15 July 2007, 21:15 using NetBeans 5.5 IDE.
 *
 * CA 326 Third Year Project.
 * Bryan Carter - Student no: 53697673.
 *
 */

package calczor;
import java.util.*;
import java.lang.*;
import java.math.*;
/**
 *
 * @author  Arquinsiel
 */
public class ViewZor extends javax.swing.JFrame {    
    /** Creates new form ViewZor */
    public ViewZor() {
        initComponents();
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */    
    
    Vector stuff = new Vector();        // a list to hold the entire calculation.
    Double answer;                      // the current state of the calculation.
    //int retControl = 1;               // controls the execution of the calculation. Essentially a pointer to the next operation.
    //Integer operation = -1;           // simply initialised to -1 for convenience sake, this tells the switch which case to select.
    Integer number = 0;                 // this represents the code of the operation type.
    Double tempDouble;
    boolean newCalc = true;             // a signal to reset the calculator after a calculation is finished.
    boolean decBool = false;            // a signal to say if a calculation already has a decimal point or not.
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
    private void initComponents() {
        CalculationField = new javax.swing.JTextField();
        AnswerField = new javax.swing.JTextField();
        NumPad = new javax.swing.JPanel();
        Button7 = new javax.swing.JButton();
        Button8 = new javax.swing.JButton();
        Button9 = new javax.swing.JButton();
        Button4 = new javax.swing.JButton();
        Button5 = new javax.swing.JButton();
        Button6 = new javax.swing.JButton();
        Button1 = new javax.swing.JButton();
        Button2 = new javax.swing.JButton();
        Button3 = new javax.swing.JButton();
        Button0 = new javax.swing.JButton();
        ButtonDec = new javax.swing.JButton();
        ButtonTab = new javax.swing.JButton();
        OperatorPanel = new javax.swing.JPanel();
        AddButton = new javax.swing.JButton();
        SubButton = new javax.swing.JButton();
        MulButton = new javax.swing.JButton();
        DivButton = new javax.swing.JButton();
        RootButton = new javax.swing.JButton();
        ModBUtton = new javax.swing.JButton();
        RecButton = new javax.swing.JButton();
        IndexButton = new javax.swing.JButton();
        EditPanel = new javax.swing.JPanel();
        ClearButton = new javax.swing.JButton();
        DelButton = new javax.swing.JButton();
        RetButton = new javax.swing.JButton();
        MenuBar = new javax.swing.JMenuBar();
        EditMenu = new javax.swing.JMenu();
        ExitButton = new javax.swing.JMenuItem();
        ViewMenu = new javax.swing.JMenu();
        Standard = new javax.swing.JRadioButtonMenuItem();
        Scientific = new javax.swing.JRadioButtonMenuItem();
        jSeparator1 = new javax.swing.JSeparator();
        AboutMenu = new javax.swing.JMenu();
        AboutButton = new javax.swing.JMenuItem();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("CA 326 - Calculator ");
        CalculationField.setHorizontalAlignment(javax.swing.JTextField.TRAILING);

        AnswerField.setHorizontalAlignment(javax.swing.JTextField.TRAILING);
        AnswerField.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                AnswerFieldActionPerformed(evt);
            }
        });

        Button7.setText("7");
        Button7.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                Button7ActionPerformed(evt);
            }
        });
        Button7.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyTyped(java.awt.event.KeyEvent evt) {
                Button7KeyTyped(evt);
            }
        });

        Button8.setText("8");
        Button8.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                Button8ActionPerformed(evt);
            }
        });
        Button8.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyTyped(java.awt.event.KeyEvent evt) {
                Button8KeyTyped(evt);
            }
        });

        Button9.setText("9");
        Button9.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                Button9ActionPerformed(evt);
            }
        });
        Button9.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyTyped(java.awt.event.KeyEvent evt) {
                Button9KeyTyped(evt);
            }
        });

        Button4.setText("4");
        Button4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                Button4ActionPerformed(evt);
            }
        });
        Button4.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyTyped(java.awt.event.KeyEvent evt) {
                Button4KeyTyped(evt);
            }
        });

        Button5.setText("5");
        Button5.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                Button5ActionPerformed(evt);
            }
        });
        Button5.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyTyped(java.awt.event.KeyEvent evt) {
                Button5KeyTyped(evt);
            }
        });

        Button6.setText("6");
        Button6.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                Button6ActionPerformed(evt);
            }
        });
        Button6.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyTyped(java.awt.event.KeyEvent evt) {
                Button6KeyTyped(evt);
            }
        });

        Button1.setText("1");
        Button1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                Button1ActionPerformed(evt);
            }
        });
        Button1.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyTyped(java.awt.event.KeyEvent evt) {
                Button1KeyTyped(evt);
            }
        });

        Button2.setText("2");
        Button2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                Button2ActionPerformed(evt);
            }
        });
        Button2.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyTyped(java.awt.event.KeyEvent evt) {
                Button2KeyTyped(evt);
            }
        });

        Button3.setText("3");
        Button3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                Button3ActionPerformed(evt);
            }
        });
        Button3.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyTyped(java.awt.event.KeyEvent evt) {
                Button3KeyTyped(evt);
            }
        });

        Button0.setText("0");
        Button0.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                Button0ActionPerformed(evt);
            }
        });
        Button0.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyTyped(java.awt.event.KeyEvent evt) {
                Button0KeyTyped(evt);
            }
        });

        ButtonDec.setText(".");
        ButtonDec.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                ButtonDecActionPerformed(evt);
            }
        });

        ButtonTab.setText("+/-");
        ButtonTab.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                ButtonTabActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout NumPadLayout = new javax.swing.GroupLayout(NumPad);
        NumPad.setLayout(NumPadLayout);
        NumPadLayout.setHorizontalGroup(
            NumPadLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(NumPadLayout.createSequentialGroup()
                .addGroup(NumPadLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(NumPadLayout.createSequentialGroup()
                        .addComponent(Button0)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(ButtonDec)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(ButtonTab))
                    .addGroup(NumPadLayout.createSequentialGroup()
                        .addGroup(NumPadLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(Button4, 0, 0, Short.MAX_VALUE)
                            .addComponent(Button7, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(NumPadLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(Button5, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(Button8, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(NumPadLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(Button6, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(Button9, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
                    .addGroup(NumPadLayout.createSequentialGroup()
                        .addComponent(Button1)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(Button2)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(Button3)))
                .addContainerGap())
        );
        NumPadLayout.setVerticalGroup(
            NumPadLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(NumPadLayout.createSequentialGroup()
                .addGroup(NumPadLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(Button7)
                    .addComponent(Button8)
                    .addComponent(Button9))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(NumPadLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(Button4)
                    .addComponent(Button5)
                    .addComponent(Button6))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(NumPadLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(Button1)
                    .addComponent(Button2)
                    .addComponent(Button3))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(NumPadLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(Button0)
                    .addComponent(ButtonDec)
                    .addComponent(ButtonTab))
                .addContainerGap())
        );

        AddButton.setText("+");
        AddButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                AddButtonActionPerformed(evt);
            }
        });

        AddButton.getAccessibleContext().setAccessibleName("PlusButton");

        SubButton.setText("-");
        SubButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                SubButtonActionPerformed(evt);
            }
        });

        SubButton.getAccessibleContext().setAccessibleName("MinusButton");

        MulButton.setText("*");
        MulButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                MulButtonActionPerformed(evt);
            }
        });

        MulButton.getAccessibleContext().setAccessibleName("MulButton");

        DivButton.setText("/");
        DivButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                DivButtonActionPerformed(evt);
            }
        });

        DivButton.getAccessibleContext().setAccessibleName("DivButton");

        RootButton.setText("Sqrt");
        RootButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                RootButtonActionPerformed(evt);
            }
        });

        RootButton.getAccessibleContext().setAccessibleName("RootButton");

        ModBUtton.setText("%");
        ModBUtton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                ModBUttonActionPerformed(evt);
            }
        });

        ModBUtton.getAccessibleContext().setAccessibleName("ModButton");

        RecButton.setText("1/x");
        RecButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                RecButtonActionPerformed(evt);
            }
        });

        RecButton.getAccessibleContext().setAccessibleName("RecipButton");

        IndexButton.setText("n^x");
        IndexButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                IndexButtonActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout OperatorPanelLayout = new javax.swing.GroupLayout(OperatorPanel);
        OperatorPanel.setLayout(OperatorPanelLayout);
        OperatorPanelLayout.setHorizontalGroup(
            OperatorPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(OperatorPanelLayout.createSequentialGroup()
                .addGroup(OperatorPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(DivButton, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(MulButton, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(SubButton, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(AddButton, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGap(2, 2, 2)
                .addGroup(OperatorPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(ModBUtton, javax.swing.GroupLayout.DEFAULT_SIZE, 57, Short.MAX_VALUE)
                    .addComponent(RootButton, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 57, Short.MAX_VALUE)
                    .addComponent(RecButton, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 57, Short.MAX_VALUE)
                    .addComponent(IndexButton, javax.swing.GroupLayout.DEFAULT_SIZE, 57, Short.MAX_VALUE)))
        );
        OperatorPanelLayout.setVerticalGroup(
            OperatorPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(OperatorPanelLayout.createSequentialGroup()
                .addGroup(OperatorPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(AddButton)
                    .addComponent(RootButton))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(OperatorPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(SubButton)
                    .addComponent(ModBUtton, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(OperatorPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(MulButton)
                    .addComponent(RecButton))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(OperatorPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(IndexButton)
                    .addComponent(DivButton))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        ClearButton.setText("CE");
        ClearButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                ClearButtonActionPerformed(evt);
            }
        });

        ClearButton.getAccessibleContext().setAccessibleName("CEButton");

        DelButton.setText("Delete");
        DelButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                DelButtonActionPerformed(evt);
            }
        });

        DelButton.getAccessibleContext().setAccessibleName("DeleteButton");

        RetButton.setText("Answer");
        RetButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                RetButtonActionPerformed(evt);
            }
        });
        RetButton.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyTyped(java.awt.event.KeyEvent evt) {
                RetButtonKeyTyped(evt);
            }
        });

        RetButton.getAccessibleContext().setAccessibleName("AnswerButton");

        javax.swing.GroupLayout EditPanelLayout = new javax.swing.GroupLayout(EditPanel);
        EditPanel.setLayout(EditPanelLayout);
        EditPanelLayout.setHorizontalGroup(
            EditPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(ClearButton, javax.swing.GroupLayout.DEFAULT_SIZE, 69, Short.MAX_VALUE)
            .addComponent(DelButton, javax.swing.GroupLayout.DEFAULT_SIZE, 69, Short.MAX_VALUE)
            .addComponent(RetButton, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        EditPanelLayout.setVerticalGroup(
            EditPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(EditPanelLayout.createSequentialGroup()
                .addComponent(DelButton)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(ClearButton)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(RetButton, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );

        EditMenu.setText("Edit");
        ExitButton.setText("Exit");
        ExitButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                ExitButtonActionPerformed(evt);
            }
        });

        EditMenu.add(ExitButton);

        MenuBar.add(EditMenu);

        ViewMenu.setText("Menu");
        Standard.setSelected(true);
        Standard.setText("Standard");
        ViewMenu.add(Standard);

        Scientific.setText("Scientific");
        ViewMenu.add(Scientific);

        ViewMenu.add(jSeparator1);

        MenuBar.add(ViewMenu);

        AboutMenu.setText("About");
        AboutButton.setText("About");
        AboutButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                AboutButtonActionPerformed(evt);
            }
        });

        AboutMenu.add(AboutButton);

        MenuBar.add(AboutMenu);

        setJMenuBar(MenuBar);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(AnswerField, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 318, Short.MAX_VALUE)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(NumPad, javax.swing.GroupLayout.PREFERRED_SIZE, 137, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(OperatorPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(EditPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addComponent(CalculationField, javax.swing.GroupLayout.DEFAULT_SIZE, 318, Short.MAX_VALUE))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(CalculationField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(AnswerField, javax.swing.GroupLayout.PREFERRED_SIZE, 20, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(OperatorPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(NumPad, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(EditPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addContainerGap())
        );
        pack();
    }// </editor-fold>//GEN-END:initComponents

    private int factorial(int FactInt)
    // a recursive method to find factorials of ints. later requires re-conversion to Double. Not used in final version.
    {
        if (FactInt == 1)
        {
            return FactInt;
        }else
        {
            int tempInt = FactInt * factorial(FactInt - 1);
            return tempInt;
        }
    }
    
    private Double squareRoot(Double number)
    // a method to take the Double and return the Square Root.
    {
        Double finalNumber = Math.sqrt(number);
        return finalNumber;
    }
    
    private Double reciprocal(Double most, Double Numerator, Double Denominator)
    // a method to convert a reciprocal fraction into a decimal.
    {
        Double temp = Numerator/Denominator;
        answer = most + temp;
        return answer;
    }

    private Double powers(Double num, Double power)
    // a recursive method to do indices.
    {
        Double answer = 1.0;
        if (power == 0)
        {
            return answer;
        }else if(power == 1)
        {
            return num;
        }else
        {
            return num * powers(num, power-1);
        }
    }
    private void RetButtonKeyTyped(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_RetButtonKeyTyped
// TODO add your handling code here:
    }//GEN-LAST:event_RetButtonKeyTyped
    
    private void Button9KeyTyped(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_Button9KeyTyped
// TODO add your handling code here:
    }//GEN-LAST:event_Button9KeyTyped
    
    private void Button8KeyTyped(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_Button8KeyTyped
// TODO add your handling code here:
    }//GEN-LAST:event_Button8KeyTyped
    
    private void Button7KeyTyped(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_Button7KeyTyped
// TODO add your handling code here:
    }//GEN-LAST:event_Button7KeyTyped
    
    private void Button6KeyTyped(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_Button6KeyTyped
// TODO add your handling code here:
    }//GEN-LAST:event_Button6KeyTyped
    
    private void Button5KeyTyped(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_Button5KeyTyped
// TODO add your handling code here:
    }//GEN-LAST:event_Button5KeyTyped
    
    private void Button4KeyTyped(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_Button4KeyTyped
// TODO add your handling code here:
    }//GEN-LAST:event_Button4KeyTyped
    
    private void Button3KeyTyped(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_Button3KeyTyped
// TODO add your handling code here:
    }//GEN-LAST:event_Button3KeyTyped
    
    private void Button2KeyTyped(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_Button2KeyTyped
// TODO add your handling code here:
    }//GEN-LAST:event_Button2KeyTyped
    
    private void Button1KeyTyped(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_Button1KeyTyped
// TODO add your handling code here:
    }//GEN-LAST:event_Button1KeyTyped
    
    private void Button0KeyTyped(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_Button0KeyTyped
// If the box is empty do nothing, otherwise add a zero to the end of the string.
        //Button8ActionPerformed(java.awt.event.ActionEvent evt);
        /*String AnswerText = AnswerField.getText();
        if (AnswerText != null)
        {
            AnswerText = AnswerText + "0";
            AnswerField.setText(AnswerText);
        }*/
    }//GEN-LAST:event_Button0KeyTyped

    private void IndexButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_IndexButtonActionPerformed
        // Adds the current number to the vector and the code for the operation.
        String AnswerText = AnswerField.getText();
        String tempString = CalculationField.getText();
        stuff.add(AnswerText);
        CalculationField.setText(tempString + AnswerText + " ^ ");
        number = 8;
        stuff.add(number);
        AnswerField.setText(null);
        decBool = false;
    }//GEN-LAST:event_IndexButtonActionPerformed

    private void RecButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_RecButtonActionPerformed
    // TODO add your handling code here:
        String AnswerText = AnswerField.getText();
        String tempString = CalculationField.getText();
        stuff.add(AnswerText);
        CalculationField.setText(tempString + AnswerText + "/");
        number = 7;
        stuff.add(number);
        AnswerField.setText(null);
    }//GEN-LAST:event_RecButtonActionPerformed

    private void ModBUttonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_ModBUttonActionPerformed
    // Adds the current number to the vector and the code for the operation.
        String AnswerText = AnswerField.getText();
        String tempString = CalculationField.getText();
        stuff.add(AnswerText);
        CalculationField.setText(tempString + AnswerText + " % ");
        number = 6;
        stuff.add(number);
        AnswerField.setText(null);
    }//GEN-LAST:event_ModBUttonActionPerformed

    private void RootButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_RootButtonActionPerformed
    // Adds the current number to the vector and the code for the operation.
        String AnswerText = AnswerField.getText();
        String tempString = CalculationField.getText();
        stuff.add(null);
        number = 5;
        stuff.add(number);
        tempString =  "root ";                       // U+221A.toString();
        //AnswerText = tempString + AnswerText;
        AnswerText = tempString;
        CalculationField.setText(tempString);
        decBool = false;
    }//GEN-LAST:event_RootButtonActionPerformed

    private void ClearButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_ClearButtonActionPerformed
    // Clears the current item.
        String AnswerText = AnswerField.getText();
        AnswerText = null;
        AnswerField.setText(AnswerText);
        decBool = false;
        
    }//GEN-LAST:event_ClearButtonActionPerformed

    private void DelButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_DelButtonActionPerformed
    // deletes the last character entered.
        String AnswerText = AnswerField.getText();
        AnswerText = AnswerText.substring(0,AnswerText.length()-1);
        AnswerField.setText(AnswerText);        
    }//GEN-LAST:event_DelButtonActionPerformed

    private void AboutButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_AboutButtonActionPerformed
    //  should create a new form which opens the about box in a window.
        AboutBox Box = new AboutBox();
        Box.setVisible(true);
        
    }//GEN-LAST:event_AboutButtonActionPerformed

    private void ExitButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_ExitButtonActionPerformed
    // kills the program upon clicking the menuitem.
        dispose();
        System.exit(0);
    
    }//GEN-LAST:event_ExitButtonActionPerformed

    private void DivButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_DivButtonActionPerformed
    // Adds the current number to the vector and the code for the operation.
        String AnswerText = AnswerField.getText();
        String tempString = CalculationField.getText();
        stuff.add(AnswerText);
        CalculationField.setText(tempString + AnswerText + " / ");
        number = 4;
        stuff.add(number);
        decBool = false;
        AnswerField.setText(null);
        
    }//GEN-LAST:event_DivButtonActionPerformed

    private void MulButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_MulButtonActionPerformed
    // Adds the current number to the vector and the code for the operation.
        String AnswerText = AnswerField.getText();
        String tempString = CalculationField.getText();
        stuff.add(AnswerText);
        CalculationField.setText(tempString + AnswerText + " * ");
        number = 3;
        stuff.add(number);
        decBool = false;
        AnswerField.setText(null);
    }//GEN-LAST:event_MulButtonActionPerformed

    private void SubButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_SubButtonActionPerformed
    // Adds the current number to the vector and the code for the operation.
        String AnswerText = AnswerField.getText();
        String tempString = CalculationField.getText();
        stuff.add(AnswerText);
        CalculationField.setText(tempString + AnswerText + " - ");
        number = 2;
        stuff.add(number);
        decBool = false;
        AnswerField.setText(null);
    }//GEN-LAST:event_SubButtonActionPerformed

    private void AddButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_AddButtonActionPerformed
    // Adds the current number to the vector and the code for the operation.
        String AnswerText = AnswerField.getText();
        String tempString = CalculationField.getText();
        stuff.add(AnswerText);
        CalculationField.setText(tempString + AnswerText + " + ");      
        number = 1;
        stuff.add(number);
        decBool = false;
        AnswerField.setText(null);       
    }//GEN-LAST:event_AddButtonActionPerformed

    private void RetButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_RetButtonActionPerformed
    // While the vector still has elements to it run through it and perform the operation.
        int retControl = 1;                                         // moves onto the first operation, later used as a pointer to the operation code.
        String AnswerText = AnswerField.getText();                  // takes the current (and last) item entered.
        stuff.add(AnswerText);                                      // adds it to the vector for later retrieval.
        String tempString = CalculationField.getText();             // takes the entire calculation from the relevant field.
        CalculationField.setText(tempString + AnswerText);          // adds the last item to above and displays the entire calculation.
        String startString = stuff.elementAt(0).toString();         // takes the first item from the vector and
        answer = Double.parseDouble(startString);                   // converts it to something usable.
        
        while (retControl < stuff.size()-1)
        // while we have information in the vector, keep stepping through until it has all been processed.
        {   
            
            tempString = stuff.elementAt(retControl).toString();    // retrieves the operation code and
            int operation = Integer.parseInt(tempString);           // converts it to an integer
            tempString = stuff.elementAt(retControl+1).toString();  // retrieves the item ahead of the operation counter.
            tempDouble = Double.parseDouble(tempString);            // makes it usable.
            
            switch (operation)                                      // switches to cases based on operation code, different case for each operation.
            {
                case 1: answer = answer + tempDouble; break;        // addition
                case 2: answer = answer - tempDouble; break;        // subtraction
                case 3: answer = answer * tempDouble; break;        // multiplication
                case 4: answer = answer / tempDouble; break;        // division
                case 5: answer = squareRoot(tempDouble);            // roots
                case 6: answer = answer % tempDouble; break;        // modulus
                case 7: String tempDenominator = stuff.elementAt(retControl+3).toString();
                    Double denominator = Double.parseDouble(tempDenominator);
                    answer = reciprocal(answer, tempDouble, denominator); 
                    break;
                case 8: answer = powers(answer, tempDouble); break; // indices
                /*  Failed cases for doing Sin, Cos, Tan and Factorials.
                    case 9: answer = Math.sin(tempDouble); break;       // sin
                    case 10: answer = Math.cos(tempDouble); break;      // cos
                    case 11: answer = Math.tan(tempDouble); break;      // tan
                    case 12: Integer FactInt = Integer.parseInt(AnswerText);
                    FactInt = factorial(FactInt);
                    tempString = FactInt.toString();
                    answer = Double.parseDouble(tempString);
                    break;                                          // factorial
                 */
            }
            retControl = retControl + 2;                            // jump ahead two vector items.
        }
        AnswerField.setText(answer.toString());                     // outputs the final answer to the answerfield.
        newCalc = false;
        decBool = false;
        stuff = new Vector();
    }//GEN-LAST:event_RetButtonActionPerformed
    
    private void ButtonTabActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_ButtonTabActionPerformed
// TODO add your handling code here:
        if (newCalc == false)
        {
            CalculationField.setText(null);
            AnswerField.setText(null);
        }
        String AnswerText = AnswerField.getText();                  // get the current number.
        if (AnswerText.substring(0,1).equals("-") == false)         // if it doesn't have a "-" at the start
        {
            AnswerText = "-" + AnswerText;                          // put one there.
        }else if(AnswerText.substring(0,1).equals("-"))             // of if it does
        {
            AnswerText = AnswerText.substring(1,AnswerText.length());// take it away.
        }
        AnswerField.setText(AnswerText);                            // then send it back.
    }//GEN-LAST:event_ButtonTabActionPerformed

    private void ButtonDecActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_ButtonDecActionPerformed
// TODO add your handling code here:
        if (decBool == false)
        {
             if (newCalc == false)
            {
                CalculationField.setText("");
                AnswerField.setText("");
            }
            String AnswerText = AnswerField.getText();                  // check the number.
            if (AnswerText == null)                                     // if it's blank
            {
                AnswerText = "0.";                                      // add "0."
                AnswerField.setText(AnswerText);                        // and return it.
            }else                                                       // if there is a number there.
            {
                AnswerText = AnswerText + ".";                          // simply add a "." to it.
                AnswerField.setText(AnswerText);                        // then send it back.
            }
            decBool = true;
        }else
        {
        }
    }//GEN-LAST:event_ButtonDecActionPerformed

    private void Button0ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Button0ActionPerformed
    // If the box is empty do nothing, otherwise add a zero to the end of the string.
        if (newCalc == false)
        {
            CalculationField.setText("");
            AnswerField.setText("");
        }
        String AnswerText = AnswerField.getText();
        if (AnswerText != null)
        {
            AnswerText = AnswerText + "0";
            AnswerField.setText(AnswerText);
        }
    }//GEN-LAST:event_Button0ActionPerformed

    private void Button3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Button3ActionPerformed
// TODO add your handling code here:
        if (newCalc == false)
        {
            CalculationField.setText("");
            AnswerField.setText("");
        }
        String AnswerText = AnswerField.getText();
        if (AnswerText == null)
        {
            AnswerText = "3";
            AnswerField.setText(AnswerText);
        }else
        {
            AnswerText = AnswerText + "3";
            AnswerField.setText(AnswerText);
        }
    }//GEN-LAST:event_Button3ActionPerformed

    private void Button2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Button2ActionPerformed
// TODO add your handling code here:
        if (newCalc == false)
        {
            CalculationField.setText("");
            AnswerField.setText("");
        }
        String AnswerText = AnswerField.getText();
        if (AnswerText == null)
        {
            AnswerText = "2";
            AnswerField.setText(AnswerText);
        }else
        {
            AnswerText = AnswerText + "2";
            AnswerField.setText(AnswerText);
        }
    }//GEN-LAST:event_Button2ActionPerformed

    private void Button1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Button1ActionPerformed
// TODO add your handling code here:
        String AnswerText = AnswerField.getText(); 
        if (AnswerText == null)
        {
            AnswerText = "1";
            AnswerField.setText(AnswerText);            
        }else
        {
            AnswerText = AnswerText + "1";
            AnswerField.setText(AnswerText);
        }
    }//GEN-LAST:event_Button1ActionPerformed

    private void Button6ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Button6ActionPerformed
// TODO add your handling code here:
        if (newCalc == false)
        {
            CalculationField.setText("");
            AnswerField.setText("");
        }
        String AnswerText = AnswerField.getText();
        if (AnswerText == null)
        {
            AnswerText = "6";
            AnswerField.setText(AnswerText);
        }else
        {   
            AnswerText = AnswerText + "6";
            AnswerField.setText(AnswerText);
        }
    }//GEN-LAST:event_Button6ActionPerformed

    private void Button5ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Button5ActionPerformed
// TODO add your handling code here:
        if (newCalc == false)
        {
            CalculationField.setText("");
            AnswerField.setText("");
        }
        String AnswerText = AnswerField.getText();
        if (AnswerText == null)
        {
            AnswerText = "5";
            AnswerField.setText(AnswerText);
        }else
        { 
            AnswerText = AnswerText + "5";
            AnswerField.setText(AnswerText);
        }
    }//GEN-LAST:event_Button5ActionPerformed

    private void Button4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Button4ActionPerformed
// TODO add your handling code here:
        if (newCalc == false)
        {
            CalculationField.setText("");
            AnswerField.setText("");
        }
        String AnswerText = AnswerField.getText();
        if (AnswerText == null)
        {
            AnswerText = "4";
            AnswerField.setText(AnswerText);
        }else
        {         
            AnswerText = AnswerText + "4";
            AnswerField.setText(AnswerText);
        }
    }//GEN-LAST:event_Button4ActionPerformed

    private void Button9ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Button9ActionPerformed
// TODO add your handling code here:
        if (newCalc == false)
        {
            CalculationField.setText("");
            AnswerField.setText("");
        }
        String AnswerText = AnswerField.getText();
        if (AnswerText == null)
        {
            AnswerText = "9";
            AnswerField.setText(AnswerText);
        }else
        { 
            AnswerText = AnswerText + "9";
            AnswerField.setText(AnswerText);
        }
    }//GEN-LAST:event_Button9ActionPerformed

    private void Button8ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Button8ActionPerformed
        // TODO add your handling code here:
        if (newCalc == false)
        {
            CalculationField.setText("");
            AnswerField.setText("");
        }
        String AnswerText = AnswerField.getText();
        if (AnswerText == null)
        {
            AnswerText = "8";
            AnswerField.setText(AnswerText);
        }else
        { 
            AnswerText = AnswerText + "8";
            AnswerField.setText(AnswerText);
        }
    }//GEN-LAST:event_Button8ActionPerformed

    private void AnswerFieldActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_AnswerFieldActionPerformed
// TODO add your handling code here:
        
    }//GEN-LAST:event_AnswerFieldActionPerformed

    private void Button7ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Button7ActionPerformed
// TODO add your handling code here:
        if (newCalc == false)
        {
            CalculationField.setText("");
            AnswerField.setText("");
        }
        String AnswerText = AnswerField.getText();
        if (AnswerText == null)
        {
            AnswerText = "7";
            AnswerField.setText(AnswerText);
        }else
        { 
            AnswerText = AnswerText + "7";
            AnswerField.setText(AnswerText);
        }
    }//GEN-LAST:event_Button7ActionPerformed
        
    /**
     * @param args the command line arguments
     */ 
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new ViewZor().setVisible(true);
            }
        });
    }
   
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JMenuItem AboutButton;
    private javax.swing.JMenu AboutMenu;
    private javax.swing.JButton AddButton;
    private javax.swing.JTextField AnswerField;
    private javax.swing.JButton Button0;
    private javax.swing.JButton Button1;
    private javax.swing.JButton Button2;
    private javax.swing.JButton Button3;
    private javax.swing.JButton Button4;
    private javax.swing.JButton Button5;
    private javax.swing.JButton Button6;
    private javax.swing.JButton Button7;
    private javax.swing.JButton Button8;
    private javax.swing.JButton Button9;
    private javax.swing.JButton ButtonDec;
    private javax.swing.JButton ButtonTab;
    private javax.swing.JTextField CalculationField;
    private javax.swing.JButton ClearButton;
    private javax.swing.JButton DelButton;
    private javax.swing.JButton DivButton;
    private javax.swing.JMenu EditMenu;
    private javax.swing.JPanel EditPanel;
    private javax.swing.JMenuItem ExitButton;
    private javax.swing.JButton IndexButton;
    private javax.swing.JMenuBar MenuBar;
    private javax.swing.JButton ModBUtton;
    private javax.swing.JButton MulButton;
    private javax.swing.JPanel NumPad;
    private javax.swing.JPanel OperatorPanel;
    private javax.swing.JButton RecButton;
    private javax.swing.JButton RetButton;
    private javax.swing.JButton RootButton;
    private javax.swing.JRadioButtonMenuItem Scientific;
    private javax.swing.JRadioButtonMenuItem Standard;
    private javax.swing.JButton SubButton;
    private javax.swing.JMenu ViewMenu;
    private javax.swing.JSeparator jSeparator1;
    // End of variables declaration//GEN-END:variables
    //AnswerText = AnswerField.getText();
    //Double Answer = AnswerText.toDouble();
}