Examples of javax.swing.plaf.basic.BasicPopupMenuUI$MenuKeyboardHelper

javax.swing.plaf.basic.BasicPopupMenuUI

This helper is added to MenuSelectionManager as a ChangeListener to listen to menu selection changes. When a menu is activated, it passes focus to its parent JRootPane, and installs an ActionMap/InputMap pair on that JRootPane. Those maps are necessary in order for menu navigation to work. When menu is being deactivated, it restores focus to the component that has had it before menu activation, and uninstalls the maps. This helper is also installed as a KeyListener on root pane when menu is active. It forwards key events to MenuSelectionManager for mnemonic keys handling.

    /*
     * Test method for 'javax.swing.JPopupMenu.getUI()'
     */
    public void testSetGetUI() {
        assertNotNull("ui is returned ", popup.getUI());
        PopupMenuUI ui = new BasicPopupMenuUI();
        popup.setUI(ui);
        assertSame("ui is returned ", ui, popup.getUI());
    }

Examples of javax.swing.plaf.basic.BasicPopupMenuUI$MenuKeyboardHelper

Related Classes of javax.swing.plaf.basic.BasicPopupMenuUI$MenuKeyboardHelper