Example usage for javax.swing JComboBox getKeyListeners

Introduction

In this page you can find the example usage for javax.swing JComboBox getKeyListeners.

Prototype

public synchronized KeyListener[] getKeyListeners() 

Source Link

Document

Returns an array of all the key listeners registered on this component.

Usage

From source file:imageuploader.ImgWindow.java

private void setExplicitSelectionManager(JComboBox comboBox) {

    class ExplicitSelectionManager implements KeyListener, FocusListener {

        private JComboBox src;
        private KeyListener superKeyListener;

        ExplicitSelectionManager(JComboBox src) {
            this.src = src;

            //   we like what the default key listener does, but not the action command
            // it uses for ActionEvents it fires for plain text type-ahead characters
            this.superKeyListener = src.getKeyListeners()[0]; // we only have one
            src.removeKeyListener(superKeyListener); // will be replace right away, below
        }//from   w  w w  .j a  va2  s  .co m

        @Override
        public void keyTyped(KeyEvent e) {
            // basic combo box has no code in keyTyped
        }

        @Override
        public void keyPressed(KeyEvent e) {

            //   in the default JComboBox implementation, the KeySelectionManager is
            // called from keyPressed. I'm fine with the implementation of
            // the default, but I don't want it firing ActionEvents that will cause
            // model updates
            src.setActionCommand("comboBoxMovement");
            this.superKeyListener.keyPressed(e);
            src.setActionCommand("comboBoxChanged");

            if (e.getKeyCode() == 10) {
                src.setSelectedIndex(src.getSelectedIndex());
            }
        }

        @Override
        public void keyReleased(KeyEvent e) {
            // basic combo box has no code in keyReleased
        }

        @Override
        public void focusGained(FocusEvent e) {
        }

        @Override
        //  this will also give us the event we want, if the user decides to Tab out of
        // the combo box, instead of hitting Enter
        public void focusLost(FocusEvent e) {
            src.setSelectedIndex(src.getSelectedIndex());
        }

    }

    ExplicitSelectionManager newSelectionManager = new ExplicitSelectionManager(comboBox);

    comboBox.addKeyListener(newSelectionManager);
    comboBox.addFocusListener(newSelectionManager);

}

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