how to keep the popup while clicking on JCheckBoxMenuItem?

[Esmaeil Ashrafi]

Hi there;
As we know, the pop-up of a (J)Menu will be disappeared after click on its (J)MenuItem or JCheckBoxMenuItem (the latter is my case).
So i want to know either if it is possible to force it not disappear or if i should another equivalent

Actually I'm looking a way for check box menu item, because user may want to switch between checking/unchecking without disappearing the pop-up and have to click on menu(s) again and again

Thank you

[Darryl Burke]

Here's a UI delegate I wrote some time ago for the same purpose.

package darrylbu.plaf;

import javax.swing.JComponent;
import javax.swing.MenuSelectionManager;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicCheckBoxMenuItemUI;

public class StayOpenCheckBoxMenuItemUI extends BasicCheckBoxMenuItemUI {

   @Override
   protected void doClick(MenuSelectionManager msm) {
      menuItem.doClick(0);
   }

   public static ComponentUI createUI(JComponent c) {
      return new StayOpenCheckBoxMenuItemUI();
   }
}

You can set this UI to individual JCheckBoxMenuItems using setUI(...) or, if this is the behavior you want for ALL JCheckBoxMenuItems in your application, you can make it the default using

    UIManager.put("CheckBoxMenuItemUI",
            "darrylbu.plaf.StayOpenCheckBoxMenuItemUI");

[Esmaeil Ashrafi]

0umm,that looks pretty nice...
Thank you Darryl, i used your deligate as an inner class in my UI class and then invoked setUI() and that worked well, but for overriding the UI Manager, i got Error!
I should mention that i override the JCheckBoxMenuItem class too! lets look at the snippets:

before creating my class i have several overrides, latest is your suggestion, and i used it as several flavors:

  
// i used one of these each time to experiment...

UIManager.put("CheckBoxMenuItemUI", new StayOpenCheckBoxMenuItemUI()); // here i placed ur class out of my
                                             //  class, but both in same file 
// one of following two ways used when i placed ur class as a static inner class
UIManager.put("CheckBoxMenuItemUI", "UI.StayOpenCheckBoxMenuItemUI");
//or
UIManager.put("CheckBoxMenuItemUI", new UI.StayOpenCheckBoxMenuItemUI());

the method below does the all gUI stuff creation:

  void createAndShowGUI()  {
        class MyCheckBoxMenuItem extends JCheckBoxMenuItem{
            MyCheckBoxMenuItem(String label, String tooltip, ActionListener listener){
                super(label);
                setToolTipText(tooltip);
                setFont(myFont);
                addActionListener(listener);
            }
        }
// some stuff not related to issue !

// making a new [b]MyCheckBoxMenuItem[/b] ...

// some other stuff not related to issue !

}

and the same error i get every time:

  
run:
UIDefaults.getUI() failed: no ComponentUI class for: UI$1MyCheckBoxMenuItem[,0,0,0x0,invalid,alignmentX=0.0,alignmentY=0.0,border=,flags=0,maximumSize=,minimumSize=,preferredSize=,defaultIcon=,disabledIcon=,disabledSelectedIcon=,margin=null,paintBorder=false,paintFocus=false,pressedIcon=,rolloverEnabled=false,rolloverIcon=,rolloverSelectedIcon=,selectedIcon=,text=محاسبه ی خودکار]
java.lang.Error
        at javax.swing.UIDefaults.getUIError(UIDefaults.java:711)
        at javax.swing.MultiUIDefaults.getUIError(MultiUIDefaults.java:133)
        at javax.swing.UIDefaults.getUI(UIDefaults.java:741)
        at javax.swing.UIManager.getUI(UIManager.java:989)
        at javax.swing.JMenuItem.updateUI(JMenuItem.java:232)
        at javax.swing.JMenuItem.init(JMenuItem.java:194)
        at javax.swing.JMenuItem.<init>(JMenuItem.java:133)
        at javax.swing.JCheckBoxMenuItem.<init>(JCheckBoxMenuItem.java:147)
        at javax.swing.JCheckBoxMenuItem.<init>(JCheckBoxMenuItem.java:105)
        at UI$1MyCheckBoxMenuItem.<init>(UI.java:137)
        at UI.createAndShowGUI(UI.java:151)
        at UI.initialize(UI.java:115)
        at UI.access$000(UI.java:79)
        at UI$1.run(UI.java:96)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) 

I think i should compile your given delegate and place its class in the extension folder..., or something else

Again, thank you very much

[Darryl Burke]

  UIManager.put("CheckBoxMenuItemUI", "UI.StayOpenCheckBoxMenuItemUI()");    

Isn't your UI class in a package? You need to put the fully qualified class name to the UIManager, as shown in my code sample.

The other two attempts, where you put an instance of the class, just don't make sense.

For a better understanding of how this stuff works, read the source code for the relevant classes. You can find the JDK sources in src.zip in your JDK folder.

[Esmaeil Ashrafi]

Dear Darryl,
I was using your given delligate in the same file as UI was saved (as an inner class), now i create a seperate file for that and placed that in the same package as my UI class exists, so this resolved an currently works perfect.
Thank you for all your gentleness.
P.S: No, i just created a new project in NetBeans and this have no package (just two class, now three ) and the pranthesses in the value in the statement

  UIManager.put("CheckBoxMenuItemUI", "UI.StayOpenCheckBoxMenuItemUI()");  

was just a typo ,sorry for that.

best of regards
Esmaeil Ashrafi