Is the GUI enabled?

Set this value to false to disable all GUI interaction. All controls will be draw semi-transparently, and will not respond to user input.

Enabled / Disabled GUI controls.

	// The value tracking whether or not the extended options can be toggled.
	var allOptions : boolean = true;
	// The 2 extended options.
	var extended1 : boolean = true;
	var extended2 : boolean = true;
	function OnGUI () {
		// Make a toggle control that allows the user to edit some extended options.
		allOptions = GUI.Toggle (Rect (0,0,150,20), allOptions, "Edit All Options");
	
		// Assign the value of it to the GUI.enabled - if the checkbox above
		// is disabled, so will these GUI elements be
		GUI.enabled = allOptions;
		
		// These two controls will only be enabled if the button above is on.
		extended1 = GUI.Toggle (Rect (20,20,130,20), extended1, "Extended Option 1");
		extended2 = GUI.Toggle (Rect (20,40,130,20), extended2, "Extended Option 2");
		
		// We're done with the conditional block, so make GUI code be enabled again.
		GUI.enabled = true;
		
		// Make an Ok button
		if (GUI.Button (Rect (0, 60, 150, 20), "Ok"))
			print ("user clicked ok");
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    public bool allOptions = true;
    public bool extended1 = true;
    public bool extended2 = true;
    void OnGUI() {
        allOptions = GUI.Toggle(new Rect(0, 0, 150, 20), allOptions, "Edit All Options");
        GUI.enabled = allOptions;
        extended1 = GUI.Toggle(new Rect(20, 20, 130, 20), extended1, "Extended Option 1");
        extended2 = GUI.Toggle(new Rect(20, 40, 130, 20), extended2, "Extended Option 2");
        GUI.enabled = true;
        if (GUI.Button(new Rect(0, 60, 150, 20), "Ok"))
            print("user clicked ok");
        
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	public allOptions as bool = true

	public extended1 as bool = true

	public extended2 as bool = true

	def OnGUI() as void:
		allOptions = GUI.Toggle(Rect(0, 0, 150, 20), allOptions, 'Edit All Options')
		GUI.enabled = allOptions
		extended1 = GUI.Toggle(Rect(20, 20, 130, 20), extended1, 'Extended Option 1')
		extended2 = GUI.Toggle(Rect(20, 40, 130, 20), extended2, 'Extended Option 2')
		GUI.enabled = true
		if GUI.Button(Rect(0, 60, 150, 20), 'Ok'):
			print('user clicked ok')