Swing - calling events from inside panel

I have simple Swing GUI with main window JFrame and its main panel derive from JPanel. The panel has some buttons that can be clicked and 开发者_开发技巧generate events.

I want these events affect data stored in JFrame because it is my main application - it has some queues for thread, open streams and so on.

So how do I make my button in panel invoke callbacks in its parent frame? What is best practice of this for Java/Swing?

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To invoke methods in the parent frame you need a reference to the parent frame. So your JPanel's constructor can be declared like this:

 public MyPanel(MyFrame frame){
    super();
    this.frame = frame;
    //the rest of your code
}

And in the JFrame you invoke this constructor like this:

  panel = new MyPanel(this);//this refers to your JFrame

In the event handlers attached to your buttons you now have access to the frame and can invoke the various methods as needed.

  button1.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
           //do some stuff
           frame.someMethod();//invoke method on frame
           //do more stuff
      }
  });

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Have a look on this tutorial for using SwingWorker.

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Use addActionListener method on desired buttons specifying the class implementing ActionListener.

ActionListenerClass actionListenerObject = new actionListenerClass();
JButton b = new JButton("Button");
b.addActionListener(actionListenerObject);

public class ActionListenerClass implements ActionListener(){
 //or better : actionListenerClass extends AbstractAction
      public void actionPerformed(ActionEvent e) {
      }
}

EDIT:

Yes, I know this. But the action listener I want to be in parent JFrame class - this is the problem

then extends JFrame class making the new derived class implementing the desired interface.

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You can implement the ActionListener in your class that has the JFrame (or extends it):

class MyPanelClass {
    public MyPanelClass(ActionListener al)
    {
        //...
        JButton myButton = new JButton("Button");
        myButton.addActionListener(al);
        //...
    }
}

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class MainClass extends JFrame implements ActionListener {
    public void someMethod() {
        MyPanelClass mpc = new MyPanelClass(this);
    }

    @Override
    public void ActionPerformed(ActionEvent ev) {
        // your implementation
    }
}