javax.swing.JMenu#setPopupMenuVisible ( )源码实例Demo

private void unconfigureMenu(final JMenu menu) {
    if (hackedPopupFactory == null) return; // Issue 145981

    // restore the UI
    menu.getPopupMenu().setUI(menuPopupUIMap.get(menu));
    
    // restore all children
    JPanel popup = hackedPopupFactory.containerMap.get(menu);
    if(popup != null) {
        for(Component c : popup.getComponents()) {
            if(c instanceof JMenu) {
                unconfigureMenu((JMenu)c);
            } else {
                unconfigureMenuItem((JComponent) c);
            }
        }
        
        //hide the popup(s) if it's still visible
        if(menu.getPopupMenu() != null) {
            menu.getPopupMenu().setVisible(false);
        }
        popup.setVisible(false);
        //layers.remove(popup);
    }
    VisualDesignerJPanelPopup pop = hackedPopupFactory.getPopup(menu);
    if(pop != null) {
        pop.hide();
    }
    if(popup != null) {
        popup.setVisible(false);
    }
    menu.setPopupMenuVisible(false);
    hackedPopupFactory.containerMap.remove(menu);
}
 

static void simulateExpansionOfMenu(JMenu m1) {
    // simulate expansion in the menu
    if (Utilities.isMac()) {
        m1.setSelected(true);
    } else {
        m1.setPopupMenuVisible(true);
    }
}
 

public static void dynamicChangeToSubmenu(JPopupMenu popup, boolean usedToBeContained) {
    Object invoker = popup.getInvoker();

    if (!(invoker instanceof JMenu)) {
        return;
    }

    JMenu menu = (JMenu) invoker;

    if (!popup.isShowing()) {
        return;
    }

    if (isProblemConfig()) {
        callRefreshLater2(popup, menu);

        return;
    }

    refreshPopup(popup);

    Point p = popup.getLocationOnScreen();
    Dimension popupSize = popup.getPreferredSize();
    Rectangle popupRect = new Rectangle(p, popupSize);
    Rectangle screenRect = getScreenRect();
    boolean willBeContained = isPopupContained(popup);

    if (!screenRect.contains(popupRect)) {
        /*
         * The menu grew off the edge of the screen.
         */
        menu.setPopupMenuVisible(false);
        menu.setPopupMenuVisible(true);
    } else if (usedToBeContained != willBeContained) {
        /*
         * The menu grew off the edge of the containing window.
         * Use the setVisible() hack to change the menu from
         * lightweight to heavyweight.
         */
        popup.setVisible(false);
        popup.setVisible(true);
    }
}