// 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

class example(MonoBehaviour):

    public allOptions as bool = true

    public extended1 as bool = true

    public extended2 as bool = true

    def OnGUI():
        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')