I must be doing something wrong, can someone point what is the issue? thanks

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code from TextEditMenuListener class: public void menuSelected(MenuEvent menuEvent) { JMenuBar jMenuBar = (JMenuBar) view.getContentPane().getComponent(0); for(int i=2; i<6; i++) { JMenu jMenu = jMenuBar.getMenu(i); for (Component item : jMenu.getMenuComponents()) { item.setEnabled(view.isHtmlTabSelected()); } } }

Let's implement the TextEditMenuListener class in the listeners package. This class will work like the UndoMenuListener class, but for other menu items. The menu items responsible for style, font, color, etc. should only be available when the first tab is selected in our editor.
13.1. Add a boolean isHtmlTabSelected() method to the view. It must return true if the tab that displays HTML is selected in the tabbed pane (hint: its index is 0).
13.2. Add a View field to the TextEditMenuListener class. Initialize it in the class constructor.
13.3. In the TextEditMenuListener class, override the menuSelected(MenuEvent menuEvent) method. It must:
13.3.1. Use the parameter to get the object that the action was performed on. In our case, this will be a JMenu object.
13.3.2. Get a list of components (menu items) from this menu.
13.3.3. For each menu item, call the setEnabled method, passing the return value of the view's isHtmlTabSelected() method as an argument. Run the application and be sure that the style, align, color and font menu items are available only when the HTML tab is active, not when the Text tab is active.

Requirements:

The View class must have a public boolean isHtmlTabSelected() method that determines the current tab.
The TextEditMenuListener class must have a View view field.
The TextEditMenuListener(View view) constructor must initialize the view field.
The TextEditMenuListener class's menuSelected(MenuEvent menuEvent) method should set the availability of the menu items in the style, align, color, and font menus depending on the selected tab.

package com.codegym.task.task32.task3209; import com.codegym.task.task32.task3209.listeners.FrameListener; import com.codegym.task.task32.task3209.listeners.TabbedPaneChangeListener; import com.codegym.task.task32.task3209.listeners.UndoListener; import javax.swing.*; import javax.swing.undo.UndoManager; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class View extends JFrame implements ActionListener { private Controller controller; private JTabbedPane tabbedPane = new JTabbedPane(); private JTextPane htmlTextPane = new JTextPane(); private JEditorPane plainTextPane = new JEditorPane(); private UndoManager undoManager = new UndoManager(); private UndoListener undoListener = new UndoListener(undoManager); public View(){ try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception e){ ExceptionHandler.log(e); } } public void undo(){ try{ undoManager.undo(); } catch (Exception e){ ExceptionHandler.log(e); } } public void redo(){ try{ undoManager.redo(); } catch (Exception e){ ExceptionHandler.log(e); } } public void resetUndo(){ undoManager.discardAllEdits(); } public UndoListener getUndoListener() { return undoListener; } public boolean isHtmlTabSelected() { return tabbedPane.getSelectedIndex() == 0; } public void init() { initGui(); FrameListener listener = new FrameListener(this); addWindowListener(listener); setVisible(true); } public Controller getController() { return controller; } public void setController(Controller controller) { this.controller = controller; } public void exit(){ controller.exit(); } public void initMenuBar(){ JMenuBar menuBar = new JMenuBar(); MenuHelper.initFileMenu(this, menuBar); MenuHelper.initEditMenu(this, menuBar); MenuHelper.initStyleMenu(this, menuBar); MenuHelper.initAlignMenu(this, menuBar); MenuHelper.initColorMenu(this, menuBar); MenuHelper.initFontMenu(this, menuBar); MenuHelper.initHelpMenu(this, menuBar); getContentPane().add(menuBar, BorderLayout.NORTH); } public void initEditor(){ htmlTextPane.setContentType("text/html"); JScrollPane jScrollPane = new JScrollPane(htmlTextPane); tabbedPane.add("HTML", jScrollPane); JScrollPane jScrollPane1 = new JScrollPane(plainTextPane); tabbedPane.add("Text", jScrollPane1); tabbedPane.setPreferredSize(new Dimension(800, 500)); TabbedPaneChangeListener tabbedPaneChangeListener = new TabbedPaneChangeListener(this); tabbedPane.addChangeListener(tabbedPaneChangeListener); getContentPane().add(tabbedPane, BorderLayout.CENTER); } public void initGui(){ initMenuBar(); initEditor(); pack(); } @Override public void actionPerformed(ActionEvent e) { } public void selectedTabChanged() { } public boolean canUndo(){ return undoManager.canUndo(); } public boolean canRedo() { return undoManager.canRedo(); } }

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brus5

Level 41 , Dąbrowa Górnicza, Poland

18 August 2020, 18:06

That code can be simplified:

public void menuSelected(MenuEvent e) {
    JMenu object = (JMenu) e.getSource();
    for (Component component : object.getMenuComponents())
        component.setEnabled(view.isHtmlTabSelected());
}

Niladri pradhan

Level 33 , Mumbai, India

25 December 2019, 06:23

solution

code for menuSelected method JMenu menu = (JMenu)e.getSource(); List<Component> components = Arrays.asList(menu.getMenuComponents()); for(Component item : components){ item.setEnabled(view.isHtmlTabSelected()); }

Evghenii Seremet

Level 41 , London, United Kingdom

25 December 2019, 09:55

Thank you for your help.