// File: TestScrollPane.java (Module 11)
//
// Author: Rahul Simha
// Created: November 10, 1998.
//
// Replaces the Cardlayout with a single Panel 
// and a ScrollPane.

import java.awt.*;
import java.awt.event.*;


class NewFrame extends Frame {

  // Data.
  Panel centerpanel;   // For the questions.
  TextField tf;        // Used in question 1.
  boolean              // Store selections for Q2.
    q2_option1,
    q2_option2,
    q2_option3,
    q2_option4;
  Choice q4_choice; // For question 4.
  double               // Score on each question.
    q1_score = 0,
    q2_score = 0,
    q3_score = 0,
    q4_score = 0;

  ScrollPane sc;       // For placing all the questions.

  // Constructor.
  public NewFrame (int width, int height)
  {
    this.setTitle ("Snoot Club Membership Test");
    this.setResizable (true);
    this.setBackground (Color.cyan);
    this.setSize (width, height);
    // this.setLayout (new BorderLayout());

    // First, a welcome message, as a Label.
    Label L = new Label ("Are you elitist enough for our exclusive club?"
                         + " Fill out the form and find out");
    L.setFont (new Font ("Serif", Font.BOLD | Font.ITALIC, 15));
    L.setForeground (Color.blue);
    this.add (L, BorderLayout.NORTH);

    // Now the center panel.
    centerpanel = new Panel ();
    centerpanel.setLayout (new GridLayout (4,1));
    centerpanel.add (first_question ());
    centerpanel.add (second_question());
    centerpanel.add (third_question());
    centerpanel.add (fourth_question());

    // Next, the scrollpane.
    sc = new ScrollPane ();
    sc.add (centerpanel);

    // Add the scrollpane to the frame.
    this.add (sc, BorderLayout.CENTER);

    // Next, a panel of four buttons at the bottom.
    // The four buttons: quit, submit, next-question, previous-question.
    Panel bottom_panel = get_bottom_panel ();
    this.add (bottom_panel, BorderLayout.SOUTH);

    // Finally, show the frame.
    this.setVisible (true);
  }

  // No-parameter constructor.
  public NewFrame () 
  {
    this (500, 300);
  }


  // The first question uses labels for the question and
  // gets input via a textfield. A panel containing all 
  // these things is returned. The question asks for
  // a vacation destination: the more exotic the location,
  // the higher the score.

  Panel first_question ()
  {
    // We will package everything into a panel and return the panel.
    Panel subpanel = new Panel ();

    // We will place things in a single column, so 
    // a GridLayout with one column is appropriate.
    subpanel.setLayout (new GridLayout (8,1));

    Label L1 = new Label ("Question 1:");
    L1.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L1);

    Label L2 = new Label ("  Select a vacation destination");
    L2.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L2);

    Label L3 = new Label ("    1. Baltimore");
    L3.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L3);

    Label L4 = new Label ("    2. Disneyland");
    L4.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L4);

    Label L5 = new Label ("    3. Grand Canyon");
    L5.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L5);

    Label L6 = new Label ("    4. French Riviera");
    L6.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L6);

    Label L7 = new Label ("Enter 1,2,3 or 4 below:");
    L7.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L7);

    // Here's the textfield to get user-input.
    tf = new TextField ();
    tf.addTextListener (
      new TextListener () {
        // This interface has only one method.
        public void textValueChanged (TextEvent t)
	{
	  String q1_string = tf.getText();
	  if (q1_string.equals ("2"))
	    q1_score = 2;
	  else if (q1_string.equals ("3"))
	    q1_score = 3;
	  else if (q1_string.equals ("4"))
	    q1_score = 4;
	  else
	    q1_score = 1;
	}  
      }
    );
    subpanel.add (tf);

    return subpanel;
  }


  // For the second question, a collection of checkboxes
  // will be used. More than one selection can be made.
  // A listener is required for each checkbox. The state
  // of each checkbox is recorded.

  Panel second_question ()
  {
    Panel subpanel = new Panel ();
    subpanel.setLayout (new GridLayout (7,1));

    Label L1 = new Label ("Question 2:");
    L1.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L1);

    Label L2 = new Label ("  Select ONE OR MORE things that ");
    L2.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L2);

    Label L3 = new Label ("  you put into your lunch sandwich");
    L3.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L3);

    // Initialize the selections to false.
    q2_option1 = q2_option2 = q2_option3 = q2_option4 = false;

    // First checkbox.
    Checkbox c1 = new Checkbox ("Ham, beef or turkey");
    c1.addItemListener (
      new ItemListener () {
        public void itemStateChanged (ItemEvent i)
	{
	  Checkbox c = (Checkbox) i.getSource();
          q2_option1 = c.getState();
	}
      }
    );
    subpanel.add (c1);

    // Second checkbox.
    Checkbox c2 = new Checkbox ("Cheese");
    c2.addItemListener (
      new ItemListener () {
        // This is where we will react to a change in checkbox.
        public void itemStateChanged (ItemEvent i)
	{
	  Checkbox c = (Checkbox) i.getSource();
          q2_option2 = c.getState();
	}
      }
    );
    subpanel.add (c2);

    // Third checkbox.
    Checkbox c3 = new Checkbox ("Sun-dried Arugula leaves");
    c3.addItemListener (
      new ItemListener () {
        public void itemStateChanged (ItemEvent i)
	{
	  Checkbox c = (Checkbox) i.getSource();
          q2_option3 = c.getState();
	}
      }
    );
    subpanel.add (c3);

    // Fourth checkbox.
    Checkbox c4 = new Checkbox ("Lemon-enhanced smoked Siberian caviar");
    c4.addItemListener (
      new ItemListener () {
        public void itemStateChanged (ItemEvent i)
	{
	  Checkbox c = (Checkbox) i.getSource();
          q2_option4 = c.getState();
	}
      }
    );
    subpanel.add (c4);

    return subpanel;
  }


  // The third question allows only one among four choices
  // to be selected. We will use checkboxes, but also use
  // an associated CheckboxGroup to enforce only one selection.

  Panel third_question ()
  {
    Panel subpanel = new Panel ();
    subpanel.setLayout (new GridLayout (6,1));

    Label L1 = new Label ("Question 3:");
    L1.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L1);

    Label L2 = new Label ("  And which mustard do you use?");
    L2.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L2);

    // First, create the CheckboxGroup instance.
    // This instance will be passed to each Checkbox.
    CheckboxGroup cgroup = new CheckboxGroup();

    // First checkbox.
    Checkbox c1 = new Checkbox ("Who cares?", cgroup, true);
    c1.addItemListener (
      new ItemListener () {
        public void itemStateChanged (ItemEvent i)
	{
	  Checkbox c = (Checkbox) i.getSource();
          if (c.getState()) q3_score = 1;
	}
      }
    );
    subpanel.add (c1);

    // Second checkbox.
    Checkbox c2 = new Checkbox ("Safeway Brand", cgroup, false);
    c2.addItemListener (
      new ItemListener () {
        public void itemStateChanged (ItemEvent i)
	{
	  Checkbox c = (Checkbox) i.getSource();
          if (c.getState()) q3_score = 2;
	}
      }
    );
    subpanel.add (c2);

    // Third checkbox.
    Checkbox c3 = new Checkbox ("Fleishman's", cgroup, false);
    c3.addItemListener (
      new ItemListener () {
        public void itemStateChanged (ItemEvent i)
	{
	  Checkbox c = (Checkbox) i.getSource();
          if (c.getState()) q3_score = 3;
	}
      }
    );
    subpanel.add (c3);

    // Fourth checkbox.
    Checkbox c4 = new Checkbox ("Grey Poupon", cgroup, false);
    c4.addItemListener (
      new ItemListener () {
        public void itemStateChanged (ItemEvent i)
	{
	  Checkbox c = (Checkbox) i.getSource();
          if (c.getState()) q3_score = 4;
	}
      }
    );
    subpanel.add (c4);

    return subpanel;
  }


  // For the fourth question we will use a drop-down Choice.

  Panel fourth_question ()
  {
    Panel subpanel = new Panel ();
    subpanel.setLayout (new GridLayout (3,1));

    Label L1 = new Label ("Question 4:");
    L1.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L1);

    Label L2 = new Label ("  Your movie preference, among these:");
    L2.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L2);

    // Create a Choice widget.
    q4_choice = new Choice ();
    q4_choice.add ("Lethal Weapon IV");
    q4_choice.add ("Titanic");
    q4_choice.add ("Saving Private Ryan");
    q4_choice.add ("Le Art Movie avec subtitles");
    q4_score = 1;
    q4_choice.addItemListener (
      new ItemListener () {
        public void itemStateChanged (ItemEvent e)
	{
	  q4_score = 1 + q4_choice.getSelectedIndex();
	}
      }
    );
    subpanel.add (q4_choice);

    return subpanel;
  }

  void compute_result ()
  {
    // Clear the center panel.
    centerpanel.removeAll();

    // Display a wait-cursor.
    this.setCursor (new Cursor(Cursor.WAIT_CURSOR));

    // Create a new panel to display in the center.
    Panel subpanel = new Panel (new GridLayout (5,1));

    // Score on question 1.
    Label L1 = new Label ("Score on question 1: " + q1_score);
    L1.setFont (new Font ("Serif", Font.ITALIC, 15));
    subpanel.add (L1);

    // Score on question 2.
    if (q2_option1) q2_score += 1;
    if (q2_option2) q2_score += 2;
    if (q2_option3) q2_score += 3;
    if (q2_option4) q2_score += 4;
    q2_score = 0.6 * q2_score;
    Label L2 = new Label ("Score on question 2: " + q2_score);
    L2.setFont (new Font ("Serif", Font.ITALIC, 15));
    subpanel.add (L2);

    // Score on question 3.
    Label L3 = new Label ("Score on question 3: " + q3_score);
    L3.setFont (new Font ("Serif", Font.ITALIC, 15));
    subpanel.add (L3);

    // Score on question 4.
    Label L4 = new Label ("Score on question 4: " + q4_score);
    L4.setFont (new Font ("Serif", Font.ITALIC, 15));
    subpanel.add (L4);

    // Weighted score.
    double avg = (q1_score + q2_score + q3_score + q4_score) / (double) 4;
    Label L5;
    if (avg <= 3.5)
      L5 = new Label ("Your average score: " + avg + " - REJECTED!");
    else 
      L5 = new Label ("Your average score: " + avg + " - WELCOME!");
    L5.setFont (new Font ("Serif", Font.BOLD, 20));
    L5.setAlignment (Label.CENTER);
    subpanel.add (L5);

    // Now add the new subpanel.
    centerpanel.add (subpanel, "5");

    // Need to mark the centerpanel as "altered"
    centerpanel.invalidate();

    // Go back to original cursor.
    this.setCursor (new Cursor(Cursor.DEFAULT_CURSOR));

    // Everything "invalid" (e.g., the centerpanel above)
    // is now re-computed.
    this.validate();
  }

  Panel get_bottom_panel ()
  {
    // Create a panel into which we will place buttons.
    Panel bottom_panel = new Panel ();

    // A submit button.
    Button submit = new Button ("Submit");
    submit.setBackground (Color.green);
    submit.setFont (new Font ("Serif", Font.PLAIN | Font.BOLD, 15));
    submit.addActionListener (
      new ActionListener () {
        public void actionPerformed (ActionEvent a)
	{
	  // Perform submit task.
	  compute_result();
	}  
      }
    );
    bottom_panel.add (submit);

    Button quitb = new Button ("Quit");
    quitb.setBackground (Color.red);
    quitb.setFont (new Font ("Serif", Font.PLAIN | Font.BOLD, 15));
    quitb.addActionListener (
      new ActionListener () {
        public void actionPerformed (ActionEvent a)
	{
	  System.exit (0);
	}  
      }
    );
    bottom_panel.add (quitb);

    return bottom_panel;
  }

}


public class TestScrollPane {
  public static void main (String[] argv)
  {
    NewFrame nf = new NewFrame (500, 300);
  }
}