3. GUI Events

GUI Open/Close Event

There is also a GUI event that is fired when the GUI is opened or closed. You can listen to it within the GUI creation section. Patterns:

run (when|while) (open[ing]|clos(e|ing)) [[the] gui]
run (when|while) [the] gui (opens|closes)
run on gui (open[ing]|clos(e|ing))

If you wanted to send the player a message when they opened and closed the GUI, you could do:

command /opengui:
  trigger:
    create a gui with virtual chest inventory with 3 rows named "My EPIC GUI!" and shape "xxxxxxxxx", "x-------x", and "xxxxxxxxx":
      run on gui open:
        send "Welcome to this GUI %player%!" to player
      run on gui close:
        send "Thanks for visiting this GUI %player%!" to player
    open the last gui for the player

A GUI Close Event may also be cancelled. Pattern:

(cancel|uncancel) [the] gui clos(e|ing)

Using this in your GUIs is as simple as putting the effect within the section.

command /opengui:
  trigger:
    create a gui with virtual chest inventory with 3 rows named "Your New Home":
      run on gui close:
        cancel gui close
        send "You will never escape this GUI %player%!" to player
    open the last gui for the player