javax.swing.JComponent#setFocusTraversalKeys ( )源码实例Demo

/**
 * This method sets the FocusTraversalKeys for a component to be the standard keys.
 * Use this on Tables or TextAreas where you want the tab keys to leave the control.
 *
 * @param component the component that you want to fix tab keys for
 */
public static void fixTabKeys(final JComponent component) {
    final Set<AWTKeyStroke> forward = new HashSet<AWTKeyStroke>(
            component.getFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS));
    forward.add(KeyStroke.getKeyStroke("TAB"));
    component.setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, forward);
    final Set<AWTKeyStroke> backward = new HashSet<AWTKeyStroke>(
            component.getFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS));
    backward.add(KeyStroke.getKeyStroke("shift TAB"));
    component.setFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, backward);
}
 

private static void forwardFocusWhenTabKeyReleased(JComponent aSenderComponent, JComponent aReceiverComponent) {
    ForwardFocusAction forwardFocusAction = new ForwardFocusAction("TabKeyAction", aReceiverComponent);
    aSenderComponent.setFocusTraversalKeys(0, new HashSet());
    int modifiers = 0; // '0' => no modifiers
    int keyCode = KeyEvent.VK_TAB;
    KeyStroke tabKeyReleased = KeyStroke.getKeyStroke(keyCode, modifiers, true);
    aSenderComponent.getInputMap(1).put(tabKeyReleased, forwardFocusAction.getName());
    aSenderComponent.getActionMap().put(forwardFocusAction.getName(), forwardFocusAction);
}
 

public static void fixFocusTraversalKeys(JComponent component) {
    Set<AWTKeyStroke> set = component.getFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS);
    set = new HashSet<AWTKeyStroke>(set);
    set.add(AWTKeyStroke.getAWTKeyStroke(KeyEvent.VK_TAB, InputEvent.CTRL_DOWN_MASK | InputEvent.ALT_DOWN_MASK));
    component.setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, set);
}