package ps1;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.border.BevelBorder;
import javax.swing.border.Border;


/**
 * <B>PolyCalcFrame</b> and <b>PolyGraph</b> are part of the graphical
 * calculator that utilizes all of the other classes in package ps1.
 */

public class PolyCalcFrame extends JFrame {
    JPanel jPanel1 = new JPanel();
    JPanel jPanel2 = new JPanel();
    JPanel jPanel3 = new JPanel();
    JPanel jPanel4 = new JPanel();
    JPanel jPanel5 = new JPanel();
    JPanel jPanel6 = new JPanel();
    JPanel jPanel8 = new JPanel();
    Border border1;
    JLabel jLabel5 = new JLabel();
    JLabel jLabel6 = new JLabel();
    JTextField jTextField1 = new JTextField();
    JTextField jTextField2 = new JTextField();
    JButton jButton_exp = new JButton();
    JButton jButton_div = new JButton();
    JButton jButton_mul = new JButton();
    JButton jButton_7 = new JButton();
    JButton jButton_8 = new JButton();
    JButton jButton_9 = new JButton();
    JButton jButton_4 = new JButton();
    JButton jButton_5 = new JButton();
    JButton jButton_6 = new JButton();
    JButton jButton_1 = new JButton();
    JButton jButton_2 = new JButton();
    JButton jButton_3 = new JButton();
    JButton jButton_0 = new JButton();
    JButton jButton_x = new JButton();
    JButton jButton_Enter = new JButton();
    JButton jButton_plus = new JButton();
    JButton jButton_minus = new JButton();
    JButton jButton_swap = new JButton();
    JButton jButton_pop = new JButton();
    JButton jButton_dup = new JButton();
    JButton jButton_int = new JButton();
    JButton jButton_dif = new JButton();
    JTextArea jTextArea_Current = new JTextArea();
    JTextArea jTextArea_Stack_3 = new JTextArea();
    JTextArea jTextArea_Stack_2 = new JTextArea();
    JTextArea jTextArea_Stack_1 = new JTextArea();
    JTextArea jTextArea_Stack_0 = new JTextArea();
    BorderLayout borderLayout1 = new BorderLayout();

    PolyGraph pg = null;

    RatPolyStack stack = null;
    Border border2;
    Border border3;
    Border border4;
    Border border5;
    JPanel jPanel7 = new JPanel();
    JButton jButton_stack_mul = new JButton();
    JButton jButton_stack_div = new JButton();
    JButton jButton_stack_add = new JButton();
    JButton jButton_stack_sub = new JButton();
    JButton jButton_Clear = new JButton();



    // Serializable classes are supposed to have this
    private static final long serialVersionUID = 42L;


    public PolyCalcFrame() {
        try
            {
                jbInit();
                // exit the application when this window is closed
                addWindowListener(new WindowAdapter() {
                        public void windowClosing(WindowEvent e) {
                            setVisible(false);
                            dispose();
                            System.exit(0);
                        }
                    });
            }
        catch(Exception e)
            {
                e.printStackTrace();
            }
    }
    private void jbInit() throws Exception
    {
        border1 = BorderFactory.createBevelBorder(BevelBorder.LOWERED,Color.white,Color.white,Color.white,new Color(124, 124, 124));
        border2 = BorderFactory.createBevelBorder(BevelBorder.LOWERED,Color.red,Color.white,new Color(178, 178, 178),new Color(124, 124, 124));
        border3 = BorderFactory.createBevelBorder(BevelBorder.LOWERED,Color.blue,Color.white,new Color(178, 178, 178),new Color(124, 124, 124));
        border4 = BorderFactory.createBevelBorder(BevelBorder.LOWERED,Color.green,Color.white,new Color(178, 178, 178),new Color(124, 124, 124));
        border5 = BorderFactory.createBevelBorder(BevelBorder.LOWERED,Color.orange,Color.white,new Color(178, 178, 178),new Color(124, 124, 124));
        jPanel1.setLayout(null);
        jPanel1.setBackground(Color.gray);
        jPanel1.setBorder(BorderFactory.createRaisedBevelBorder());
        jPanel2.setBorder(BorderFactory.createRaisedBevelBorder());
        jPanel2.setBounds(new Rectangle(21, 21, 330, 371));
        jPanel2.setLayout(borderLayout1);
        jPanel3.setBorder(BorderFactory.createRaisedBevelBorder());
        jPanel3.setBounds(new Rectangle(366, 23, 259, 219));
        jPanel3.setLayout(null);
        jPanel4.setBorder(BorderFactory.createRaisedBevelBorder());
        jPanel4.setBounds(new Rectangle(365, 258, 258, 132));
        jPanel4.setLayout(null);
        jPanel5.setBorder(BorderFactory.createRaisedBevelBorder());
        jPanel5.setBounds(new Rectangle(21, 410, 167, 90));
        jPanel5.setLayout(null);
        jPanel6.setBorder(BorderFactory.createRaisedBevelBorder());
        jPanel6.setBounds(new Rectangle(197, 410, 196, 275));
        jPanel6.setLayout(null);
        jPanel8.setBorder(BorderFactory.createRaisedBevelBorder());
        jPanel8.setBounds(new Rectangle(21, 510, 167, 90));
        jPanel8.setLayout(null);
        jLabel5.setText("X max");
        jLabel5.setBounds(new Rectangle(8, 47, 34, 25));
        jLabel6.setBounds(new Rectangle(10, 10, 34, 24));
        jLabel6.setText("X min");
        jTextField1.setText("-1.0");
        jTextField1.setBounds(new Rectangle(50, 15, 104, 22));
        jTextField1.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jTextField1_actionPerformed(e);
                }
            });
        jTextField2.setBounds(new Rectangle(49, 51, 104, 22));
        jTextField2.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jTextField2_actionPerformed(e);
                }
            });
        jTextField2.setText("1.0");
        jButton_exp.setFont(new java.awt.Font("Dialog", 0, 18));
        jButton_exp.setMargin(new Insets(2, 2, 2, 2));
        jButton_exp.setText("^");
        jButton_exp.setBounds(new Rectangle(9, 10, 41, 44));
        jButton_exp.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_exp_actionPerformed(e);
                }
            });
    
        jButton_int.setBounds(new Rectangle(10, 7, 146, 35));
        jButton_int.setText("Integrate");
        jButton_int.setFont(new java.awt.Font("Dialog", 0, 18));
        jButton_int.setMargin(new Insets(2, 2, 2, 2));
        jButton_int.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_int_actionPerformed(e);
                }
            });
    
        jButton_dif.setBounds(new Rectangle(10, 47, 146, 36));
        jButton_dif.setText("Differentiate");
        jButton_dif.setFont(new java.awt.Font("Dialog", 0, 18));
        jButton_dif.setMargin(new Insets(2, 2, 2, 2));
        jButton_dif.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_dif_actionPerformed(e);
                }
            });
    
        jButton_div.setBounds(new Rectangle(103, 10, 41, 44));
        jButton_div.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_div_actionPerformed(e);
                }
            });
        jButton_div.setText("/");
        jButton_div.setFont(new java.awt.Font("Dialog", 0, 18));
        jButton_div.setMargin(new Insets(2, 2, 2, 2));
        jButton_mul.setFont(new java.awt.Font("Dialog", 0, 18));
        jButton_mul.setMargin(new Insets(2, 2, 2, 2));
        jButton_mul.setText("*");
        jButton_mul.setBounds(new Rectangle(55, 10, 41, 44));
        jButton_mul.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_mul_actionPerformed(e);
                }
            });
        jButton_7.setBounds(new Rectangle(9, 60, 41, 44));
        jButton_7.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_7_actionPerformed(e);
                }
            });
        jButton_7.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_7.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_7.setMargin(new Insets(2, 2, 2, 2));
        jButton_7.setText("7");
        jButton_8.setText("8");
        jButton_8.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_8.setMargin(new Insets(2, 2, 2, 2));
        jButton_8.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_8.setBounds(new Rectangle(55, 60, 41, 44));
        jButton_8.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_8_actionPerformed(e);
                }
            });
        jButton_9.setBounds(new Rectangle(103, 60, 41, 44));
        jButton_9.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_9_actionPerformed(e);
                }
            });
        jButton_9.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_9.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_9.setMargin(new Insets(2, 2, 2, 2));
        jButton_9.setText("9");
        jButton_4.setText("4");
        jButton_4.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_4.setMargin(new Insets(2, 2, 2, 2));
        jButton_4.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_4.setBounds(new Rectangle(9, 111, 41, 44));
        jButton_4.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_4_actionPerformed(e);
                }
            });
        jButton_5.setBounds(new Rectangle(55, 111, 41, 44));
        jButton_5.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_5_actionPerformed(e);
                }
            });
        jButton_5.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_5.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_5.setMargin(new Insets(2, 2, 2, 2));
        jButton_5.setText("5");
        jButton_6.setText("6");
        jButton_6.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_6.setMargin(new Insets(2, 2, 2, 2));
        jButton_6.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_6.setBounds(new Rectangle(103, 111, 41, 44));
        jButton_6.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_6_actionPerformed(e);
                }
            });
        jButton_1.setBounds(new Rectangle(9, 163, 41, 44));
        jButton_1.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_1_actionPerformed(e);
                }
            });
        jButton_1.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_1.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_1.setMargin(new Insets(2, 2, 2, 2));
        jButton_1.setText("1");
        jButton_2.setText("2");
        jButton_2.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_2.setMargin(new Insets(2, 2, 2, 2));
        jButton_2.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_2.setBounds(new Rectangle(55, 163, 41, 44));
        jButton_2.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_2_actionPerformed(e);
                }
            });
        jButton_3.setBounds(new Rectangle(103, 163, 41, 44));
        jButton_3.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_3_actionPerformed(e);
                }
            });
        jButton_3.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_3.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_3.setMargin(new Insets(2, 2, 2, 2));
        jButton_3.setText("3");
        jButton_0.setText("0");
        jButton_0.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_0.setMargin(new Insets(2, 2, 2, 2));
        jButton_0.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_0.setBounds(new Rectangle(9, 218, 89, 44));
        jButton_0.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_0_actionPerformed(e);
                }
            });
        jButton_x.setText("x");
        jButton_x.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_x.setMargin(new Insets(2, 2, 2, 2));
        jButton_x.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_x.setBounds(new Rectangle(103, 218, 41, 44));
        jButton_x.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_x_actionPerformed(e);
                }
            });
        jButton_Enter.setBounds(new Rectangle(8, 171, 77, 44));
        jButton_Enter.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_Enter_actionPerformed(e);
                }
            });
        jButton_Enter.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_Enter.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_Enter.setMargin(new Insets(2, 2, 2, 2));
        jButton_Enter.setText("Enter");
        jButton_plus.setBounds(new Rectangle(149, 10, 41, 44));
        jButton_plus.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_plus_actionPerformed(e);
                }
            });
        jButton_plus.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_plus.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_plus.setMargin(new Insets(2, 2, 2, 2));
        jButton_plus.setText("+");
        jButton_minus.setText("-");
        jButton_minus.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_minus.setMargin(new Insets(2, 2, 2, 2));
        jButton_minus.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_minus.setBounds(new Rectangle(149, 61, 41, 44));
        jButton_minus.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_minus_actionPerformed(e);
                }
            });
        jButton_swap.setText("Swap");
        jButton_swap.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_swap.setMargin(new Insets(2, 2, 2, 2));
        jButton_swap.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_swap.setBounds(new Rectangle(8, 8, 75, 44));
        jButton_swap.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_swap_actionPerformed(e);
                }
            });
        jButton_pop.setBounds(new Rectangle(8, 63, 75, 44));
        jButton_pop.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_pop_actionPerformed(e);
                }
            });
        jButton_pop.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_pop.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_pop.setMargin(new Insets(2, 2, 2, 2));
        jButton_pop.setText("Pop");
        jButton_dup.setText("Dup");
        jButton_dup.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_dup.setMargin(new Insets(2, 2, 2, 2));
        jButton_dup.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_dup.setBounds(new Rectangle(8, 118, 76, 44));
        jButton_dup.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_dup_actionPerformed(e);
                }
            });
        jTextArea_Current.setLineWrap(true);
        jTextArea_Current.setBorder(BorderFactory.createLoweredBevelBorder());
        jTextArea_Current.setBounds(new Rectangle(8, 11, 239, 111));
        jTextArea_Stack_3.setLineWrap(true);
        jTextArea_Stack_3.setBorder(border5);
        jTextArea_Stack_3.setEditable(false);
        jTextArea_Stack_3.setBounds(new Rectangle(8, 10, 241, 40));
        jTextArea_Stack_2.setBounds(new Rectangle(8, 57, 241, 40));
        jTextArea_Stack_2.setLineWrap(true);
        jTextArea_Stack_2.setBorder(border4);
        jTextArea_Stack_2.setEditable(false);
        jTextArea_Stack_1.setLineWrap(true);
        jTextArea_Stack_1.setBorder(border3);
        jTextArea_Stack_1.setEditable(false);
        jTextArea_Stack_1.setBounds(new Rectangle(8, 105, 241, 40));
        jTextArea_Stack_0.setLineWrap(true);
        jTextArea_Stack_0.setBorder(border2);
        jTextArea_Stack_0.setEditable(false);
        jTextArea_Stack_0.setBounds(new Rectangle(8, 154, 241, 40));
        jPanel7.setBorder(BorderFactory.createRaisedBevelBorder());
        jPanel7.setBounds(new Rectangle(403, 411, 199, 283));
        jPanel7.setLayout(null);
        jButton_stack_mul.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_stack_mul_actionPerformed(e);
                }
            });
        jButton_stack_mul.setBounds(new Rectangle(105, 118, 75, 44));
        jButton_stack_mul.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_stack_mul.setMargin(new Insets(2, 2, 2, 2));
        jButton_stack_mul.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_stack_mul.setText("Mul");
        jButton_stack_div.setText("Div");
        jButton_stack_div.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_stack_div.setMargin(new Insets(2, 2, 2, 2));
        jButton_stack_div.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_stack_div.setBounds(new Rectangle(105, 171, 75, 44));
        jButton_stack_div.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_stack_div_actionPerformed(e);
                }
            });
        jButton_stack_add.setText("Add");
        jButton_stack_add.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_stack_add.setMargin(new Insets(2, 2, 2, 2));
        jButton_stack_add.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_stack_add.setBounds(new Rectangle(105, 8, 75, 44));
        jButton_stack_add.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_stack_add_actionPerformed(e);
                }
            });
        jButton_stack_sub.setText("Sub");
        jButton_stack_sub.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_stack_sub.setMargin(new Insets(2, 2, 2, 2));
        jButton_stack_sub.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_stack_sub.setBounds(new Rectangle(105, 63, 75, 44));
        jButton_stack_sub.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_stack_sub_actionPerformed(e);
                }
            });
        jButton_Clear.setText("Clear");
        jButton_Clear.setMargin(new Insets(2, 2, 2, 2));
        jButton_Clear.setHorizontalTextPosition(SwingConstants.CENTER);
        jButton_Clear.setFont(new java.awt.Font("Dialog", 1, 18));
        jButton_Clear.addActionListener(new java.awt.event.ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    jButton_Clear_actionPerformed(e);
                }
            });
        jButton_Clear.setBounds(new Rectangle(105, 225, 77, 44));
        this.getContentPane().add(jPanel1, BorderLayout.CENTER);
        jPanel1.add(jPanel2, null);
        jPanel1.add(jPanel3, null);
        jPanel3.add(jTextArea_Stack_3, null);
        jPanel3.add(jTextArea_Stack_2, null);
        jPanel3.add(jTextArea_Stack_0, null);
        jPanel3.add(jTextArea_Stack_1, null);
        jPanel1.add(jPanel4, null);
        jPanel4.add(jTextArea_Current, null);
        jPanel1.add(jPanel5, null);
        jPanel1.add(jPanel8, null);
        jPanel5.add(jLabel6, null);
        jPanel5.add(jLabel5, null);
        jPanel5.add(jTextField1, null);
        jPanel5.add(jTextField2, null);
        jPanel8.add(jButton_int, null);
        jPanel8.add(jButton_dif, null);
        jPanel1.add(jPanel6, null);
        jPanel6.add(jButton_exp, null);
        jPanel6.add(jButton_8, null);
        jPanel6.add(jButton_9, null);
        jPanel6.add(jButton_4, null);
        jPanel6.add(jButton_5, null);
        jPanel6.add(jButton_6, null);
        jPanel6.add(jButton_3, null);
        jPanel6.add(jButton_0, null);
        jPanel6.add(jButton_x, null);
        jPanel6.add(jButton_div, null);
        jPanel6.add(jButton_plus, null);
        jPanel6.add(jButton_mul, null);
        jPanel6.add(jButton_7, null);
        jPanel6.add(jButton_2, null);
        jPanel6.add(jButton_1, null);
        jPanel6.add(jButton_minus, null);
        jPanel1.add(jPanel7, null);
        jPanel7.add(jButton_pop, null);
        jPanel7.add(jButton_dup, null);
        jPanel7.add(jButton_Enter, null);
        jPanel7.add(jButton_swap, null);
        jPanel7.add(jButton_stack_div, null);
        jPanel7.add(jButton_stack_mul, null);
        jPanel7.add(jButton_stack_add, null);
        jPanel7.add(jButton_stack_sub, null);
        jPanel7.add(jButton_Clear, null);

        pg = new PolyGraph(this);
        // pg.setBackground(Color.white);
        jPanel2.add(pg, "Center");
    }

    /**Main method*/
    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        }
        catch(Exception e) {
            e.printStackTrace();
        }

        PolyCalcFrame frame = new PolyCalcFrame();

        //Validate frames that have preset sizes
        frame.validate();

        //Center the window
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();

        frame.setSize(new Dimension(670, 730));
        frame.setTitle("Polynomial Calculator");

        Dimension frameSize = frame.getSize();

        if (frameSize.height > screenSize.height) {
            frameSize.height = screenSize.height;
        }
        if (frameSize.width > screenSize.width) {
            frameSize.width = screenSize.width;
        }
        frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
        frame.setVisible(true);
    }
    
    boolean startNewEq = false;
    void appendToCurrentText(String textToAdd)
    {
        if(startNewEq) {
            jTextArea_Current.setText("");
            startNewEq = false;
        }
        String currentText = jTextArea_Current.getText();
        jTextArea_Current.setText(currentText + textToAdd);
    }

    void jButton_1_actionPerformed(ActionEvent e)
    {
        appendToCurrentText("1");
    }

    void jButton_2_actionPerformed(ActionEvent e)
    {
        appendToCurrentText("2");
    }

    void jButton_3_actionPerformed(ActionEvent e)
    {
        appendToCurrentText("3");
    }

    void jButton_4_actionPerformed(ActionEvent e)
    {
        appendToCurrentText("4");
    }

    void jButton_5_actionPerformed(ActionEvent e)
    {
        appendToCurrentText("5");
    }

    void jButton_6_actionPerformed(ActionEvent e)
    {
        appendToCurrentText("6");
    }

    void jButton_7_actionPerformed(ActionEvent e)
    {
        appendToCurrentText("7");
    }

    void jButton_8_actionPerformed(ActionEvent e)
    {
        appendToCurrentText("8");
    }

    void jButton_9_actionPerformed(ActionEvent e)
    {
        appendToCurrentText("9");
    }

    void jButton_exp_actionPerformed(ActionEvent e)
    {
        if (startNewEq == true) 
            startNewEq = false;
        appendToCurrentText("^");
    }

    void jButton_mul_actionPerformed(ActionEvent e)
    {
        if (startNewEq == true) 
            startNewEq = false;
        appendToCurrentText("*");
    }

    void jButton_div_actionPerformed(ActionEvent e)
    {
        if (startNewEq == true) 
            startNewEq = false;
        appendToCurrentText("/");
    }

    void jButton_plus_actionPerformed(ActionEvent e)
    {
        if (startNewEq == true) 
            startNewEq = false;
        appendToCurrentText("+");
    }

    void jButton_minus_actionPerformed(ActionEvent e)
    {
        if (startNewEq == true) 
            startNewEq = false;
        appendToCurrentText("-");
    }

    void jButton_0_actionPerformed(ActionEvent e)
    {
        appendToCurrentText("0");
    }

    void jButton_x_actionPerformed(ActionEvent e)
    {
        appendToCurrentText("x");
    }

    void jButton_swap_actionPerformed(ActionEvent e)
    {
        try{
            if (stack != null)
                if (stack.size() > 1)
                    stack.swap();
            // Update displays (so that they display new stack contents).
            updateStackDisplay();
            updateGraph();
        } catch (Exception e1) {
            e1.printStackTrace();
            return;
        }
    }

    void jButton_pop_actionPerformed(ActionEvent e)
    {
        try{
            if (stack != null) {
                if (stack.size() > 0) {
                    RatPoly popped = stack.pop();
                    jTextArea_Current.setText(popped.unparse());
                    startNewEq = true;
                }
            }
            // Update displays (so that they display new stack contents).
            updateStackDisplay();
            updateGraph();
        } catch (Exception e1) {
            e1.printStackTrace();
            return;
        }
    }

    void jButton_dup_actionPerformed(ActionEvent e)
    {
        try {
            if (stack != null)
                if (stack.size() > 0)
                    stack.dup();
            // Update displays (so that they display new stack contents).
            updateStackDisplay();
            updateGraph();
        } catch (Exception e1) {
            e1.printStackTrace();
            return;
        }
    }

    void jButton_Enter_actionPerformed(ActionEvent e)
    {
        String currentText = jTextArea_Current.getText();
        RatPoly parsedRatPoly;

        startNewEq = true;
        jTextArea_Current.setText("");

        // Exception handler used here since some of this calls what will
        // ultimately be student-written code.
        try
            {
                // Create stack if necessary
                if (stack == null)
                    stack = new RatPolyStack();

                // Parse text to get new RatPoly and push it onto the stack.
                parsedRatPoly = RatPoly.parse(currentText);
                stack.push(parsedRatPoly);

                // Update displays (so that they display new stack contents).
                updateStackDisplay();
                updateGraph();
            }
        catch(Exception e1)
            {
                // Provide more informative message here.
                jTextArea_Current.setText(currentText);
                e1.printStackTrace();
                return;
            }

    }



    void updateStackDisplay()
    {
        // First, clear all the text areas for the stack display.
        jTextArea_Stack_0.setText("");
        jTextArea_Stack_1.setText("");
        jTextArea_Stack_2.setText("");
        jTextArea_Stack_3.setText("");

        RatPoly currentRatPoly;
        String tempString;

        if (stack != null)
            {

                // Now fill in new information base on what's in stack.
                // Note that size of stack must be checked.
                if (stack.size() > 0)
                    {
                        currentRatPoly = stack.get(0);
                        tempString = currentRatPoly.unparse();
                        jTextArea_Stack_0.setText(tempString);
                    }

                if (stack.size() > 1)
                    {
                        currentRatPoly = stack.get(1);
                        tempString = currentRatPoly.unparse();
                        jTextArea_Stack_1.setText(tempString);
                    }

                if (stack.size() > 2)
                    {
                        currentRatPoly = stack.get(2);
                        tempString = currentRatPoly.unparse();
                        jTextArea_Stack_2.setText(tempString);
                    }

                if (stack.size() > 3)
                    {
                        currentRatPoly = stack.get(3);
                        tempString = currentRatPoly.unparse();
                        jTextArea_Stack_3.setText(tempString);
                    }
                // Consider abstracting this better!  This would require
                // putting the text areas into an array.

            }

    }



    void updateGraph()
    {
        pg.repaint();
    }

    void jTextField1_actionPerformed(ActionEvent e)
    {
        updateGraph();
    }

    void jTextField2_actionPerformed(ActionEvent e)
    {
        updateGraph();
    }
    void jButton_stack_mul_actionPerformed(ActionEvent e)
    {
        try {
            if (stack != null)
                if (stack.size() > 1)
                    stack.mul();
            // Update displays (so that they display new stack contents).
            updateStackDisplay();
            updateGraph();
        } catch (Exception e1) {
            e1.printStackTrace();
            return;
        }
    }
    void jButton_stack_div_actionPerformed(ActionEvent e)
    {
        try {
            if (stack != null)
                if (stack.size() > 1)
                    stack.div();
            // Update displays (so that they display new stack contents).
            updateStackDisplay();
            updateGraph();
        } catch (Exception e1) {
            e1.printStackTrace();
            return;
        }
    }
  
    void jButton_int_actionPerformed(ActionEvent e)
    {
        try {
            //System.out.println("Integrate Button Clicked");
            if (stack != null)
                stack.integrate();
            updateStackDisplay();
            updateGraph();
        }
        catch(Exception e1){
            e1.printStackTrace();
            return;
        }  
    }
    void jButton_dif_actionPerformed(ActionEvent e)
    {
        try {
            //System.out.println("Differentiate Button Clicked");
            if (stack != null)
                stack.differentiate();
            updateStackDisplay();
            updateGraph();
        }
        catch(Exception e1){
            e1.printStackTrace();
            return;
        }  
    }
  
    void jButton_stack_add_actionPerformed(ActionEvent e)
    {
        try {
            if (stack != null)
                if (stack.size() > 1)
                    stack.add();
            // Update displays (so that they display new stack contents).
            updateStackDisplay();
            updateGraph();
        } catch (Exception e1) {
            e1.printStackTrace();
            return;
        }
    }
    void jButton_stack_sub_actionPerformed(ActionEvent e)
    {
        try {
            if (stack != null)
                if (stack.size() > 1)
                    stack.sub();
            // Update displays (so that they display new stack contents).
            updateStackDisplay();
            updateGraph();
        } catch (Exception e1) {
            e1.printStackTrace();
            return;
        }
    }
    void jButton_Clear_actionPerformed(ActionEvent e)
    {
        try {
            if (stack != null)
                if (stack.size() > 0)
                    stack.clear();
            // Update displays (so that they display new stack contents).
            updateStackDisplay();
            updateGraph();
        } catch (Exception e1) {
            e1.printStackTrace();
            return;
        }
    }

}