----------------------------------- KeijiAurion Mon Jan 15, 2007 10:13 am Ready to Program IDE - Keyboard Help? ----------------------------------- Hi, I'm basically computer illiterate, and I am stuck on how to make keyboard input move things across a GUI in Java. I'm using the Ready to Program Java IDE compiler, and I've run into a problem. I'm guessing I have to create whatever I want to move in the paint area (For this example, I'm using a circle). Will I have to somehow classify this circle as an object? I have found a tutorial on how to read keyboard input and determine the key code, if it is an action key, a modifier, and the location on the keyboard; but I'm unsure of what coding I'll need to modify this to move this circle around. Oh, by the way, I already know that this program is junk. Please, spare me from any flames like that; if I could use a proper Java compiler, I would. This is the tutorial I got: import javax.swing.*; import java.awt.event.*; import java.awt.BorderLayout; import java.awt.Dimension; public class KeyEventDemo extends JPanel implements KeyListener, ActionListener { JTextArea displayArea; JTextField typingArea; static final String newline = "\n"; public KeyEventDemo() { super(new BorderLayout()); JButton button = new JButton("Clear"); button.addActionListener(this); typingArea = new JTextField(20); typingArea.addKeyListener(this); //Uncomment this if you wish to turn off focus //traversal. The focus subsystem consumes //focus traversal keys, such as Tab and Shift Tab. //If you uncomment the following line of code, this //disables focus traversal and the Tab events will //become available to the key event listener. //typingArea.setFocusTraversalKeysEnabled(false); displayArea = new JTextArea(); displayArea.setEditable(false); JScrollPane scrollPane = new JScrollPane(displayArea); scrollPane.setPreferredSize(new Dimension(375, 125)); add(typingArea, BorderLayout.PAGE_START); add(scrollPane, BorderLayout.CENTER); add(button, BorderLayout.PAGE_END); } /** Handle the key typed event from the text field. */ public void keyTyped(KeyEvent e) { displayInfo(e, "KEY TYPED: "); } /** Handle the key pressed event from the text field. */ public void keyPressed(KeyEvent e) { displayInfo(e, "KEY PRESSED: "); } /** Handle the key released event from the text field. */ public void keyReleased(KeyEvent e) { displayInfo(e, "KEY RELEASED: "); } /** Handle the button click. */ public void actionPerformed(ActionEvent e) { //Clear the text components. displayArea.setText(""); typingArea.setText(""); //Return the focus to the typing area. typingArea.requestFocusInWindow(); } /* * We have to jump through some hoops to avoid * trying to print non-printing characters * such as Shift. (Not only do they not print, * but if you put them in a String, the characters * afterward won't show up in the text area.) */ protected void displayInfo(KeyEvent e, String s){ String keyString, modString, tmpString, actionString, locationString; //You should only rely on the key char if the event //is a key typed event. int id = e.getID(); if (id == KeyEvent.KEY_TYPED) { char c = e.getKeyChar(); keyString = "key character = '" + c + "'"; } else { int keyCode = e.getKeyCode(); keyString = "key code = " + keyCode + " (" + KeyEvent.getKeyText(keyCode) + ")"; } int modifiers = e.getModifiersEx(); modString = "modifiers = " + modifiers; tmpString = KeyEvent.getModifiersExText(modifiers); if (tmpString.length() > 0) { modString += " (" + tmpString + ")"; } else { modString += " (no modifiers)"; } actionString = "action key? "; if (e.isActionKey()) { actionString += "YES"; } else { actionString += "NO"; } locationString = "key location: "; int location = e.getKeyLocation(); if (location == KeyEvent.KEY_LOCATION_STANDARD) { locationString += "standard"; } else if (location == KeyEvent.KEY_LOCATION_LEFT) { locationString += "left"; } else if (location == KeyEvent.KEY_LOCATION_RIGHT) { locationString += "right"; } else if (location == KeyEvent.KEY_LOCATION_NUMPAD) { locationString += "numpad"; } else { // (location == KeyEvent.KEY_LOCATION_UNKNOWN) locationString += "unknown"; } displayArea.append(s + newline + " " + keyString + newline + " " + modString + newline + " " + actionString + newline + " " + locationString + newline); displayArea.setCaretPosition(displayArea.getDocument().getLength()); } /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Create and set up the window. JFrame frame = new JFrame("KeyEventDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane. JComponent newContentPane = new KeyEventDemo(); newContentPane.setOpaque(true); //content panes must be opaque frame.setContentPane(newContentPane); //Display the window. frame.pack(); frame.setVisible(true); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } } mod edit: wtd added code tags ----------------------------------- KeijiAurion Tue Jan 16, 2007 9:51 am Re: Ready to Program IDE - Keyboard Help? ----------------------------------- Okay, I've started to try and compile on my own; but it's just not working. *sighs* I think I understand KeyListeners and KeyEvents and such; but I'm getting a lot of events. This is my code: // Programmed by: John Elasigue // Date Started: January 10th, 2007 // This is (at least, planned to be) a remake of a Fire Emblem game. // The "FireEmblem" class. import java.applet.*; import java.awt.*; import javax.swing.*; import java.awt.event.*; public class FireEmblem extends Applet implements KeyListener, ActionListener { Object Player; int y = 0; int x = 0; int turn = 0; //Procedure for delays for drawing public static void delay (int de) { try { Thread.sleep (de); } catch (Exception e) { ; } } // This is to be used to handle the arrow keys being typed. public void keyTyped (KeyEvent e) { int id = e.getID (); if (id == KeyEvent.KEY_TYPED) { if (id == 39) // This represents the right arrow being pressed { Graphics g = g.getGraphics (); //Gets graphics from the paint class g.setColor (new Color (0, 100, 0)); Player = g.fillOval (x, y, 32, 32); delay (5); g.setColor (new Color (0, 191, 255)); Player = g.fillOval (x + 32, y, 32, 32); // Moves player's circle to the right. } } } public void init () { // Place the body of the initialization method here } // init method public void paint (Graphics g) { // Draws the green background (the grass) g.setColor (new Color (0, 100, 0)); g.fillRect (0, 0, 320, 320); // Draws the grid for movement. for (int i = 0 ; i