/*******************************
* Name: Huy Nguyen             *
* Lab #2                       *
* Fall 1998, ICS 52            *
********************************/

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

// A dialog box which allows the user to enter course info
public class AddCourseDialog extends Dialog
{
  Label		    label1, label2, label3, title;
  TextField	    textField1, textField3;
  Choice        choice;
  Button	    okButton;
  Button       	cancelButton;
  String       	courseNumber, quarter, grade;
  boolean      	cancelled;
  Panel         OKCancel;
  GridBagLayout gb;
  GridBagConstraints gc;
  Schedule schedule;

	public AddCourseDialog(Frame parent, Schedule schedule)
	{
		super( parent, true );  // true == modal
		this.schedule = schedule;
        gb = new GridBagLayout();
		setLayout(gb);
		gc = new GridBagConstraints();

		title = new Label( "ADDING-COURSES DIALOG BOX");
		gc.fill = GridBagConstraints.BOTH;
		addComponent( title, gb, gc, 0, 0, 1, 4 );

		gc.fill = GridBagConstraints.HORIZONTAL;
		label1 = new Label("Course Number:      ");
		addComponent( label1, gb, gc, 3, 0, 1, 2 );

		textField1 = new TextField("", 7);
		addComponent( textField1, gb, gc, 3, 2, 1, 2 );

		label2 = new Label("Quarter:            ");
		addComponent( label2, gb, gc, 5, 0, 1, 2 );

		choice = new Choice();
		choice.addItem("Fall, 1997");
		choice.addItem("Winter, 1997");
		choice.addItem("Spring, 1997");
		choice.addItem("Summer, 1997");
		choice.addItem("Fall, 1998");
		choice.addItem("Winter, 1998");
		choice.addItem("Spring, 1998");
		choice.addItem("Summer, 1998");
		choice.addItem("Fall, 1999");
		choice.addItem("Winter, 1999");
		choice.addItem("Spring, 1999");
		choice.addItem("Summer, 1999");
		addComponent( choice, gb, gc, 5, 2, 1, 2 );

		label3 = new Label("Grade:              ");
		addComponent( label3, gb, gc, 7, 0, 1, 2 );

		textField3 = new TextField("", 3);
		addComponent( textField3, gb, gc, 7, 2, 1, 2 );

		OKCancel = new Panel();
		OKCancel.setLayout( new FlowLayout(FlowLayout.CENTER));
		okButton = new Button("   OK   ");
		cancelButton = new Button("Cancel");
		OKCancel.add(okButton);
		OKCancel.add(cancelButton);

		addComponent( OKCancel, gb, gc, 10, 0, 1, 4 );

		setTitle( "Add Course To Schedule" );
		setSize(300,150);

		this.addWindowListener( new MyWindowAdapter() );

		ButtonListener buttonListener = new ButtonListener();
		cancelButton.addActionListener(buttonListener);
		okButton.addActionListener(buttonListener);

		setVisible( true );
}

    private void addComponent( Component c, GridBagLayout g, GridBagConstraints gc,
        int row, int column, int height, int width )
    {
        gc.gridx = column;
        gc.gridy = row;
        gc.gridwidth = width;
        gc.gridheight = height;
        g.setConstraints(c, gc);
        add(c);
    }

    public String getCourseNumber()
    {
        return courseNumber;
    }

    public String getQuarter()
    {
        return quarter;
    }

	String getGrade()
	{
		return grade;
	}

	boolean wasNotCancelled()
	{
		return !cancelled;
	}



    // The following two classes are inner classes.

    class MyWindowAdapter extends WindowAdapter
	{
		public void windowClosing(WindowEvent event)
		{
			dispose();
		}
	}

    // Since this class listens for events from two classes (buttons),
    // it uses the getSource() method to find out which button
    // sent the event message.
	class ButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent event)
		{
			Object object = event.getSource();
			if (object == cancelButton)
			  {
			    // remove the dialog from the screen
			    cancelled = true;
			    AddCourseDialog.this.dispose();
			  }
			else
			  {
			    courseNumber = AddCourseDialog.this.textField1.getText();
			    quarter      = AddCourseDialog.this.choice.getSelectedItem();
			    grade        = AddCourseDialog.this.textField3.getText();
			    //schedule.addCourse( courseNumber, quarter, grade );
			    AddCourseDialog.this.dispose();
			    cancelled = false;
			  }
		}
	}
}