Keeping track of focus gains and losses

Question

In my application, I have a text field that a user can type in an artist/title and search a music library for the query. This application is for a touchscreen so I've included a popup keyboard for the user since no keyboard will be available to use.
The idea behind it is the user touches the text field and gives it focus. Once focus is given to the text box, ther user will then be able to touch/click a JButton that will pop up a keyboard panel. I would like to pass to the keyboard panel which text field last had focus so as they touch the on-screen keys, it will type text into the last focused text field.
I read over the tutorial for using focus listeners and I understand how that works, but how can I go about getting the object that last had focus?
I'm thinking along the lines of have a focus listener on the JButton that displays the keyboard:
// This is called when the user touches the button to display the keyboard
if (artistText.focusLost)
keyboardFocus("artist");
}Obviously the above code isn't valid, but it's how I'm trying to explain myself. keyboardFocus method will have code to setText() to the artistText text field. I can figure that one out.

Answer 1

I was testing something before you replied and I was wondering if it would be practical.
Here is the partial code on my GUI class:
// Calls the keyboardFocus() method whenever focus is lost on the field
// and passes the component name
    private void titleTextFocusLost (java.awt.event.FocusEvent evt)                                   
        keyboardFocus(titleText);
// Takes the passed component and stores it in a public variable
    private void keyboardFocus (JTextField comp)
        lastFocus = comp;
// Variable that stores that compoent that last had focus
    public static JTextField lastFocus;Here is a snippet from my Keyboard class:
// Then the Q button is pressed, the letter Q is set as the text to the last
// JTextField of focus
    private void qKeyActionPerformed (java.awt.event.ActionEvent evt)                                    
        GUI.lastFocus.setText ("Q");
    } If this isn't practical, I'd definate be willing to change it, but what do you think?