Reopen an inventory

I was wondering how to reopen an Inventory only if the player closed it. So if a player clicks on something in the menu it takes them to a new menu but it wouldn't reopen it.

This is what I have right now.

GUI CLASS:
http://pastebin.com/YZyDHUmA

Reopen Inventory Event:
http://pastebin.com/yUGLcrbi

My problem is, whenever they click on an item it takes them to the next menu but then it reopens the main menu.

 

@alex3413 you could wait for the player to press on an item and then simply change the content of the inventory instead of changeing to another one

 

I've never tried to do this, how do I do this?

 

Oooor just dont reopen it in your event. Youre waiting for it to be closed then reopening it in your event. Plus your event doesnt even open the next inventory.

NEVER MIND: That was me being dumb. So just do what Shimobi suggested or just schedule the new inventory opening 10 ticks later, so after it reopens this it opens the other one.