package GCB;
import Application.Constants;
import java.awt.*;
import java.awt.event.*;

/*
    define an input field on the display
        constructor:
            name, field width
            name, field width, initial value
*/
public class InputField extends TextField {      // input area on a window

//  attributes
static String CODE_FILE = "InputField";
static int CODE_REVISION = 3;

    private int fieldType;
    private MainGUI mainGUI;

//  internal classes
    class InputActions implements ActionListener { // input from an input field
        public void actionPerformed(ActionEvent e) {}
    }

    class KeyEvents implements KeyListener {     // key strokes made
        public void keyPressed(KeyEvent e) {}
        public void keyReleased(KeyEvent e) {}
        public void keyTyped(KeyEvent e) {
            char c = e.getKeyChar();
            if(Character.isISOControl(c)) return;
            switch(fieldType) {
                case Constants.ALPHANUMERIC_FIELD:
                    if(Character.isLetterOrDigit(c))
                        return;
                    break; // error
                case Constants.POSITIVE_INT_FIELD:
                    if(Character.isDigit(c))
                        return;
                    break; // error
                case Constants.POSITIVE_FLOAT_FIELD:
                    if(Character.isDigit(c) ||
                      (c=='.') || (c=='+'))
                        return;
                    break;
                case Constants.POSITIVE_FRACTION_FIELD:
                    if(Character.isDigit(c) ||
                      (c=='.') || (c=='+'))
                        return;
                    break;
                case Constants.DOMAIN_NAME_FIELD:
                    if(Character.isLetterOrDigit(c) ||
                      (c=='.') || (c=='_') || (c=='$'))
                        return;
                    break; // error
                case Constants.IP_ADDRESS_FIELD:
                    if(Character.isDigit(c) ||
                      (c=='.'))
                        return;
                    break;
                case Constants.NAME_FIELD:
                    if(Character.isLetterOrDigit(c) ||
                      (c=='.') || (c=='_') || (c=='$') || (c=='-') ||
                      (c==' ') || (c=='(') || (c==')'))
                        return;
                    break; // error
            }
            e.consume();                         // do not process character
            mainGUI.error(CODE_FILE,
                          "invalid character ("+
                          e.getKeyChar()+
                          ")");
        }
    }

//  public methods
//  constructors
    public InputField(MainGUI g, String n, int c) {  // create the input area
        super(c);                                // create the field
        mainGUI = g;
        setName(n);                              // listeners can identify events
        fieldType = Constants.ALPHANUMERIC_FIELD;
        addActionListener(new InputField.InputActions()); // wait for input
        addKeyListener(new InputField.KeyEvents());
    }
    public InputField(MainGUI g, String n, int c, String t) { // create the input area
        super(c);                                // create the field
        mainGUI = g;
        setName(n);                              // listeners can identify events
        setText(t);                              // initial test in the field
        fieldType = Constants.ALPHANUMERIC_FIELD;
        addActionListener(new InputField.InputActions()); // wait for input
        addKeyListener(new InputField.KeyEvents());
    }
    public InputField(MainGUI g, String n, int c, int f) { // create the input area
        super(c);                                // create the field
        mainGUI = g;
        setName(n);                              // listeners can identify events
        fieldType = f;
        addActionListener(new InputField.InputActions()); // wait for input
        addKeyListener(new InputField.KeyEvents());
    }
    public InputField(MainGUI g, String n, int c, String t, int f) { // create the input area
        super(c);                                // create the field
        mainGUI = g;
        setName(n);                              // listeners can identify events
        setText(t);                              // initial test in the field
        fieldType = f;
        addActionListener(new InputField.InputActions()); // wait for input
        addKeyListener(new InputField.KeyEvents());
    }
}