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  How to Execute a KeyEvents ONCE ???  (Read 1351 times)
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Offline DMastaGX

Senior Newbie





« Posted 2008-06-05 02:30:11 »

I'm making a game, and I want to make the executions triggered by a key event to only happen ONCE when you hold down the button. I want to obligated the user to press the Button Again to activate It's function. In other words I want to take off rapid fire.

I made a simple frame that will print a sentence telling you how many times it has executed in the console when you press "Enter". The source code is below, and I will Appreciate if anyone can tell me how to disable the rapid fire.



import javax.swing.*;
import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;

public class KeyEventExecuteOnce implements KeyListener {

   public static int X = 0;

   public void keyPressed(KeyEvent Event) {

      switch (Event.getKeyCode()) {

      case KeyEvent.VK_ENTER:
         System.out.println("Button was Pressed " + X++ + " times");
         break;

      }

   }

   public void keyReleased(KeyEvent Event) {

   }

   public void keyTyped(KeyEvent Event) {

   }

   public static void main(String[] args) {

      JFrame frame = new JFrame("Execute Key Event once per button press ");
      KeyEventExecuteOnce KeyBoard = new KeyEventExecuteOnce();
      JLabel Label = new JLabel("Press Enter to print to the Console");

      frame.setSize(210, 100);
      frame.setLocationRelativeTo(null);
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setVisible(true);
      frame.setFocusable(true);
      frame.addKeyListener(KeyBoard);
      frame.add(Label);
   }

}
Offline SimonH
« Reply #1 - Posted 2008-06-05 02:47:12 »

Put a flag in;

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import javax.swing.*;
import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;

public class KeyEventExecuteOnce implements KeyListener {

   public static int X = 0;
        public static boolean enterKeyHasBeenPressed=false;

   public void keyPressed(KeyEvent Event) {

        switch (Event.getKeyCode()) {

      case KeyEvent.VK_ENTER:
                        if (!enterKeyHasBeenPressed)
                        {
                 System.out.println("Button was Pressed " + X++ + " times");
                                enterKeyHasBeenPressed=true;
                        }
          break;
      }
   }

   public void keyReleased(KeyEvent Event) {
        switch (Event.getKeyCode()) {

      case KeyEvent.VK_ENTER:
                        enterKeyHasBeenPressed=false;
          break;
      }
   }

   public void keyTyped(KeyEvent Event) {

   }

   public static void main(String[] args) {

      JFrame frame = new JFrame("Execute Key Event once per button press ");
      KeyEventExecuteOnce KeyBoard = new KeyEventExecuteOnce();
      JLabel Label = new JLabel("Press Enter to print to the Console");

      frame.setSize(210, 100);
      frame.setLocationRelativeTo(null);
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setVisible(true);
      frame.setFocusable(true);
      frame.addKeyListener(KeyBoard);
      frame.add(Label);
   }

}


People make games and games make people
Offline DMastaGX

Senior Newbie





« Reply #2 - Posted 2008-06-05 02:51:45 »

WOW, Thanks Man.  Cool
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Offline CaptainJester

JGO Knight


Medals: 12
Projects: 2
Exp: 14 years


Make it work; make it better.


« Reply #3 - Posted 2008-06-05 12:04:19 »

Didn't you ask this on GameDev.net?  I answered you there.

Offline DMastaGX

Senior Newbie





« Reply #4 - Posted 2008-06-05 17:43:04 »

Didn't you ask this on GameDev.net?  I answered you there.

I've never been to that website. You have me mistaken.
Offline CaptainJester

JGO Knight


Medals: 12
Projects: 2
Exp: 14 years


Make it work; make it better.


« Reply #5 - Posted 2008-06-06 00:47:41 »

I've never been to that website. You have me mistaken.

Ok, sorry.  It's  just that the question was identical.  Grin

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