// COBOL Programmers Swing With Java - copyright 2005 Doke, Hardgrave, & Johnson
// Chapter 11 - OO Development Issues
// Demonstrate a GUI collaborating with a PD class
// PostChecksGUI.java 1 JAN 05

import java.awt.*;
import java.awt.event.*;
public class PostChecksGUI extends MyWindow implements ActionListener
{
    // reference variables for GUI components
    Button btAccept, btClear, btClose;        // buttons
    TextField tfAccountNumber, tfCheckAmount; // text fields
    Label lblMessage;			      // label
    Panel pTop, pMiddle, pBottom;	      // panels

    CheckingAccountPD anAccount; // other variable definitions
    int accountNumber;
    float balance, checkAmount;
    boolean goodData;

    public static void main(String args[])  // main method called first
    {
	PostChecksGUI aWindow = new PostChecksGUI();
	aWindow.setSize(300,170);	    // pixels wide x pixels high
	aWindow.show();			    // display the window
	CheckingAccountPD.initialize();     // initialize data manager
   }  // end of main method

    public  PostChecksGUI() //  constructor method
    {
	setTitle("CNB - Post Checks");			// place title
	pTop = new Panel();				// create panels
	pMiddle = new Panel();
	pBottom = new Panel();

	// place labels & textfields in top panel
	pTop.setLayout(new GridLayout(2, 2));		      //  rows & 2 cols
	pTop.add(new Label("AccountNumber:  ", Label.RIGHT)); // Right justify the text
	pTop.add(tfAccountNumber = new TextField());
	pTop.add(new Label("Check Amount:  ", Label.RIGHT));
	pTop.add(tfCheckAmount = new TextField());

	// message label in middle panel
	pMiddle.setLayout(new FlowLayout());
	pMiddle.add (lblMessage = new Label("                                  "));

	// create & place the buttons in bottom panel
	pBottom.setLayout(new FlowLayout());
	pBottom.add(btAccept = new Button("Accept"));
	pBottom.add(btClear = new Button("Clear"));
	pBottom.add(btClose = new Button("Close"));

	// place panels in the window
	setLayout(new BorderLayout());
	add("North", pTop);
	add("Center", pMiddle);
	add("South", pBottom);

	btAccept.addActionListener(this);   // listen for Button Events
	btClear.addActionListener(this);
	btClose.addActionListener(this);
    } // end of constructor method

    // event handler method for button clicks
    public void actionPerformed(ActionEvent event)
     {
	if (event.getSource() == btAccept)     // if source is accept button
	    accept();
	if (event.getSource() == btClear)      // if source is clear button
	    clear();
	if (event.getSource() == btClose)      // if source is close button
	   {CheckingAccountPD.terminate();     // shut down the data manager
	    System.exit(0);}
     } // end of actionPerformed

     private void accept()
     {
	getInput();
	if (goodData)
	    postCheck();
     }  // end accept

    private void getInput()
    {
	goodData = true;
	try
	{accountNumber  =  Integer.parseInt(tfAccountNumber.getText().trim());}
	catch (NumberFormatException e)
	{
	  lblMessage.setText("Bad Account Number Entered!");
	  goodData = false;
	}
	try
	{Float f = new Float(tfCheckAmount.getText().trim());
	checkAmount =  f.floatValue();}
	catch (NumberFormatException e)
	{
	  lblMessage.setText("Bad Amount Entered!");
	  goodData = false;
	}
    }  // end getInput

    public void postCheck()
    {
	try
	{
	anAccount = CheckingAccountPD.recordACheck(accountNumber, checkAmount);
	lblMessage.setText("Balance is: " + Float.toString(anAccount.getCurrentBalance()));
	}
	catch (NoAccountFoundException e)
	{lblMessage.setText("No Account Found");}
	catch (NSFException e)
	{lblMessage.setText("Insufficient Funds");}
    }  // end postCheck

     private void clear()
     {
	tfAccountNumber.setText("");
	tfCheckAmount.setText("");
	lblMessage.setText("");
     }  // end of clear method
}  // end of PostChecksGUI.java