CODEWITHSUNDEEP
javajframe
Tseno Tsenov
Tseno Tsenov

Reputation: 23

JFrame - accessing my window from keylistener class

I am creating JFrame window In one class called Core and then in Main creating the window like this:

Core window = new Core("GAME1", 0, 0, true, true);

But then I decided to use keylistener and I created another class called Core_ControlsL: My problem is that in here:

 else if(keyCode == 113)
      {
         GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().setFullScreenWindow(this.window);
      }

I cannot figure out how to access window so that when I press F2 it goes into full screen again.

import javax.swing.UnsupportedLookAndFeelException;

This is my main.java:

public class Main
{
   public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException
   {
         Core window = new Core("GAME1", 0, 0, true, true);
   }
}

This is the Core.java:

import java.awt.GraphicsEnvironment;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.WindowConstants;

public class Core extends JFrame implements ActionListener
{
   private final String Game_Title;
   private int Window_Width;
   private int Window_Height;
   private boolean isVisible;
   private boolean isResizeable;

   public Core(String Game_Title, int Window_Width, int Window_Height, boolean isVisible, boolean isResizeable) throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException
   {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

      this.Game_Title = Game_Title;
      this.Window_Width = Window_Height;
      this.Window_Height = Window_Height;
      this.isResizeable = isResizeable;
      this.isVisible = isVisible;

      //Create JFrame
      JFrame window = new JFrame(Game_Title);
      window.setSize(Window_Width, Window_Height);
      window.setResizable(isResizeable);
      window.setExtendedState(JFrame.MAXIMIZED_BOTH);
      window.setVisible(isVisible);
      window.addKeyListener(new Core_Controls());
      window.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
      GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().setFullScreenWindow(window); // make window full screen

   }

   @Override
   public void actionPerformed(ActionEvent e)
   {

   }
}

And the Core_Controls.java:

import java.awt.GraphicsEnvironment;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

public class Core_Controls implements KeyListener
{
   @Override
   public void keyTyped(KeyEvent e)
   {
   }

   @Override
   public void keyPressed(KeyEvent e)
   {
      int keyCode;
      keyCode = e.getKeyCode();
      System.out.println(keyCode); // LLLLLL
      if(keyCode == 112)
      {
         GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().setFullScreenWindow(null);
      }
      else if(keyCode == 113)
      {
        GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().setFullScreenWindow(null);
      }
   }

   @Override
   public void keyReleased(KeyEvent e)
   {
   }
}

Upvotes: 0

Views: 128

Answers (2)

camickr
camickr

Reputation: 324157

  1. Don't use "magic numbers". "112" and "113" don't mean anything to anybody else reading the code.
  2. Better yet, don't use a KeyListener.

Swing was designed to be used with Key Bindings. Check out Key Bindings for some basic information as well as a link to the Swing tutorial on How to Use Key Bindings and links to working examples with key bindings.

Upvotes: 0

JB Nizet
JB Nizet

Reputation: 692073

Pass the window to the listener:

Core window = new Core("GAME1", 0, 0, true, true);
Core_ControlsL listener = new Core_ControlsL(window);

While you're at it, rename your class so that it reaspects the standard Java naming conventions. And use complete words instead of unreadable abbreviations. You'll thank yourself in 2 weeks when you'll re-read your own code.

Upvotes: 1

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