CODEWITHSUNDEEP
javaswingkey-bindings
Bobby
Bobby

Reputation: 2928

Key bindings - info. on key release

I am making a game, when I press the right key my ship starts spinning right which is good. But I cannot figure out how to get information for when I release the key.

board.java

public Board()
{
    setFocusable(true);
    setBackground(Color.BLACK);
    setDoubleBuffered(true);

    helper = new Helper();

    player = new Ship();

        this.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0),
                           "PlayerRight");
        this.getActionMap().put("PlayerRight",
                             new KeyBoardControl(player,"ArrowRight"));

    isRunning = true;
    gameLoop();

}

keyBoardControl.java

public class KeyBoardControl extends AbstractAction
{
public String key;
public Ship player;

public KeyBoardControl(Ship player ,String key)
{
    this.player = player;
    this.key = key;
}

@Override
public void actionPerformed(ActionEvent ae) 
{
    player.keyPressed(key);
}

}

Ship.java

public void keyPressed(String key)
{
    //int key = e.getKeyCode();
   // double angle = helper.getAngle(rotation - 90);

    if (key.contentEquals("ArrowRight"))
    {
        dRotation = 7;
    }

}
public boolean keyReleased(String key)
{
    if (key.contentEquals("ArrowRight"))
    {
        dRotation = 0;
    }
    return true;
}

Is there a key event for VK_Right release? or is there something other than the Keystroke object to use? I was using a key listener but I had a problem where it would not detect over 2 key presses correctly so I went for key binding.

Sorry if this is a duplicate, I have had a look. Any help would be much appreciated. Cheers

Upvotes: 0

Views: 1854

Answers (1)

Bobby
Bobby

Reputation: 2928

I found the answer on another stack overflow question. Java KeyBindings: How does it work?

I changed my code to 

        this.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0,false),
                           "PlayerRight");
        this.getActionMap().put("PlayerRight",
                             new KeyBoardControl(player,"ArrowRight"));

        this.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0,true),
                           "PlayerRightRelease");
        this.getActionMap().put("PlayerRightRelease",
                             new KeyBoardControl(player,"ArrowRightRelease"));

Thanks for all the help.

Upvotes: 2

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