CODEWITHSUNDEEP
javaswingconditional-statementshighlightjmenu
Gaurav Prasad
Gaurav Prasad

Reputation: 61

How to set a condition for highlighting remaining menu items in Swing?

I've created a menu in the menu bar, in which I'd like to create a JCheckBoxMenuItem to set a condition for highlighting remaining menu items.

Something like the following pseudo-code:

if login(true)
    then highlight remaining menuitems
else
    un-highlight the menuitems

Upvotes: 0

Views: 2381

Answers (3)

Heisenbug
Heisenbug

Reputation: 39164

I think for highlighting you mean enable/disable a JMenuItem. That's possible.

Use setEnabled:

JMenuItem item;
item.setEnabled(false); //to disable

Like suggested by kleopatra, the best way of doing that is to implement your own action for each JMenuItem, and let your action to enable/disable the button accordingly to the state:

For example:

public class AMenuAction extends AbstractAction {

      @override
      public void actionPerformed(ActionEvent e) {
           //implement your action behavior here
      }

}

Then construct your JMenuItem with such action:

AMenuAction afterLoginAction = new AMenuAction();
JMenuItem item = new JMenuItem(afterLoginAction );

When the user logged in/out call setEnabled method on the desired actions.

void Login()
{
    afterLoginAction.setEnabled(true); 
}

Upvotes: 5

Roman C
Roman C

Reputation: 1

Create a JCheckBoxMenuItem as userlogin menu item

JCheckBoxMenuItem jCheckBoxMenuItem = new JCheckBoxMenuItem();

then

add action listener to it

  //unhighlite other menu items before login
  jMenuFileOpen.setEnabled(false);
  //...
  jCheckBoxMenuItem.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e) {
      if (login(true)){
        jCheckBoxMenuItem.setSelected(true);
        //highlite other menu items
        jMenuFileOpen.setEnabled(true);
        //...
      } else {
        jCheckBoxMenuItem.setSelected(false);
        //unhighlite other menu items
        jMenuFileOpen.setEnabled(false);
        //...
      }
    }
  });

once login(true) is successful the checkbox is checked on menu and other menu items are enabled.

Upvotes: 2

Robin
Robin

Reputation: 36611

Enabling and disabling menu items is done in the same way as for any other JComponent by using the setEnabled( boolean ) method

Upvotes: 4

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