CODEWITHSUNDEEP
javaswinguser-interfacejlabelmouselistener
squeezy
squeezy

Reputation: 627

Making MouseListener itself change what object he's listening to

I have a game frame, with an array of JLabels in it, that i added existing (extended) MouseListener for two of them (the last and the first) at start. Now, every time a JLabel with a MouseListener had been clicked, i want it "not have" that MouseListener anymore, and instead, the MouseListener goes to the next/previous index in the JLabel array.

I can't find a mechanism that can handle that algorithm.

public class NumberGameFrame extends javax.swing.JFrame {
    ...
    JLabels[] numbers;
    int left, right;
    public void playPVC() {
        ...
        left = 0; right = numbers.legth - 1;
        PVCMouse pvc_mouse = new PVCMouse(); // MouseListener
        setPlaybleNumbers(left,right,pvc_mouse);
        ...
    }

    public void setPlaybleNumbers(int left, int right, MouseListener mouse){
        for(int i = 0; i < numbers.length; i++){ // "kill" other numbers first
            if (i != left && i != right){
                if (numbers[i].getMouseListeners() != null){
                    numbers[i].removeMouseListener(mouse);
                }
               ...
            }
        }
        numbers[left].addMouseListener(mouse);
        ...
        numbers[right].addMouseListener(mouse);
        ...
    }
    ...
}

My thought was that some how pvc_mouse.mouseClicked() can invoke this.setPlaybleNumbers(++left,..) or (--right,...), but the MouseListener cant handle the JLabel array and the setPlaybleNumbers method because they are not static.

Upvotes: 1

Views: 133

Answers (1)

Mikita Belahlazau
Mikita Belahlazau

Reputation: 15434

I see 2 solutions:

  1. Make PVCMouse inner class of NumberGameFrame. It will allow you to use all non static methods and variables.
  2. Pass array of labels to PVCMouse so it can use it by itself without knowing about NumberGameFrame. In this case you'll have to move left and right variables inside PVCMouse.

Upvotes: 1

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