/*
TS NU Grades GUI Interface Assignment 5
*/

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

//#1 Implement event proceesing
public class TSAssn5a extends JFrame implements ActionListener{
  private JTextArea frameTextArea;           //create a text area
  private Container frameContainer;          //for the content pane
  private JScrollPane scrollForTextArea;     //scroll bar
  private BorderLayout frameLayout;          //default
  final int width = 640, height = 480;       //Standard size

//#2 New attributes for data processing
  // and status bar
  private JLabel statusBar;
  //private int addedScore;

  private JMenuBar bar;
  private JMenu fileMenu, editMenu, helpMenu;
  private JMenuItem exitApp, clearText, displayText, addText,
                    aboutThisApp;
  // Constructor
  public TSAssn5a(String title){
     //Call to JFrame constructor
     super(title);
     //Call initialization
     init();
    }

  public void init(){
     //Use the WindowCloser Class
     addWindowListener(new WindowCloser(this));
     //Set up the Window for the operating system
     setLookAndFeel();

     //Get the content pane
     frameContainer = getContentPane();
     //Create an instance ofa JTextArea
     frameTextArea = new JTextArea("",
                                   18, 70);
     frameTextArea.setEditable(true);
     frameTextArea.setLineWrap(true);
     //Set the text area in the scroll pane
     scrollForTextArea = new JScrollPane(frameTextArea);

     //Create an instance of a border layout
     frameLayout = new BorderLayout();
     frameContainer.setLayout(frameLayout);

//#3 Add the status bar (JLabel)
     frameContainer.add(scrollForTextArea, BorderLayout.CENTER);
     //create a label to use as a status bar
     statusBar = new JLabel(" ");
     frameContainer.add(statusBar, BorderLayout.SOUTH);

     setSize(height, width);
     makeMenu();
//#4 Postition the window in the center of the desktop
     positionWindow();
     pack();
     setVisible(true);
  }

//----------------------------setLookAndFeel()----------------------
  //Set the look and feel for the application
  public void setLookAndFeel(){
     try{
        String lookAndFeel = UIManager.getSystemLookAndFeelClassName();
        UIManager.setLookAndFeel(lookAndFeel);
     }
     catch(Exception lFE){
       //process exception
     }
  }

//3.1
//-----------------------setStatus()---------------------------
private void setStatus(String msg){
    statusBar.setText("  " + msg);
}
//----------------------------positionWindow-----------------------------
//#4.1 Position the Frame
private void positionWindow(){
   Dimension sizeOfScreen = Toolkit.getDefaultToolkit().getScreenSize();
   Dimension sizeOfFrame = this.getSize();
   if(sizeOfFrame.height > sizeOfScreen.height){
      sizeOfFrame.height = sizeOfScreen.height;
   }
   if(sizeOfFrame.width > sizeOfScreen.width){
      sizeOfFrame.width = sizeOfScreen.width;
   }
   this.setLocation( (sizeOfScreen.width - sizeOfFrame.width) /2 ,
                (sizeOfScreen.height - sizeOfFrame.height) /2 );
}

//#5----------------------------makeMenu()-----------------------------
  private void makeMenu(){
       //Create a menu bar
     bar = new JMenuBar();

     //create File menu
     fileMenu = new JMenu("File");
     fileMenu.setMnemonic('F');
        //With menu items
        
     //generate events and add handlers
        exitApp = new JMenuItem("Exit");
        exitApp.setMnemonic('X');
        exitApp.addActionListener(this);

        //Add the File items to File menu
        fileMenu.add(exitApp);

     //create Edit menu
     editMenu = new JMenu("Edit");
     editMenu.setMnemonic('E');

       //With menu items
       clearText = new JMenuItem("Clear Text");
       clearText.setMnemonic('R');
       displayText = new JMenuItem("Display Text");
       displayText.setMnemonic('D');
       addText = new JMenuItem("Add Text");
       addText.setMnemonic('A');

       //Add the Edit items to Edit menu
       editMenu.add(clearText);
       clearText.addActionListener(this);
       editMenu.add(displayText);
       displayText.addActionListener(this);
       editMenu.add(addText);
       addText.addActionListener(this);

     //create Help menu
     helpMenu = new JMenu("Help");
     helpMenu.setMnemonic('H');
        //With menu items
        aboutThisApp = new JMenuItem("About...");
        aboutThisApp.setMnemonic('A');
        aboutThisApp.addActionListener(this);
        //Add the Help items to Help menu
        helpMenu.add(aboutThisApp);

    
     //Add File, Edit, and Help to bar
     bar.add(fileMenu);
     bar.add(editMenu);
     bar.add(helpMenu);

     //Add the menu bar to the content pane
     setJMenuBar(bar);
  }//end makeMenu
//#3.1-----------------------main()---------------------------------
  public static void main(String args[]){
     new TSAssn5a("TSNU Grades");
  }//end main
}//end class