Using OnMouseDown (or similar) to toggle worldspace UI (4.6)

Question

I'd been using the following c# script to make a level select menu appear when a door in the scene is clicked, and disappear when clicking anywhere else.

 using UnityEngine;
 using System.Collections;
 
 public class Door_click : MonoBehaviour {
 
     private bool toggleBox = false;
     
     void OnMouseDown (){
         toggleBox = true;
         
         Debug.Log ("clicked on door!");
     }
     
     void OnGUI(){
         
         if (toggleBox)
             // Make a background box
             GUI.Box (new Rect (Screen.width/2, Screen.height/2 - 100, 200, 170), "Select room");
         
         
         if (toggleBox)
             // Make the first button.
         if (GUI.Button (new Rect (Screen.width/2 + 10, Screen.height/2 - 70, 180, 25), "Room 1")) {
             Application.LoadLevel ("scene_1");
         }
 
         if (toggleBox)
             // Make the second button.
         if (GUI.Button (new Rect (Screen.width/2 + 10, Screen.height/2 - 35, 180, 25), "Room 2")) {
             Application.LoadLevel ("scene_2");    
         }
 
         if (toggleBox)
             // Make the third button.
         if (GUI.Button (new Rect (Screen.width/2 + 10, Screen.height/2, 180, 25), "Room 3")) {
             Application.LoadLevel ("scene_3");    
         }
 
         if (toggleBox)
             // Make the fourth button.
         if (GUI.Button (new Rect (Screen.width/2 + 10, Screen.height/2 + 35, 180, 25), "Room 4")) {
             Application.LoadLevel ("scene_4");    
         }
 
         Event e = Event.current;
         if (e.type == EventType.MouseDown) {
             toggleBox = false;
         }
     }
 }

I'm completely new to any type of programming, so it's probably really messy, but at least it was working.

I'm now trying to do the same thing with the new UI, but I'm completely stuck.

How do I write a script, that can be attatched to my door, to make a different game object (in this case the canvas with all the buttons on) appear and disappear?

Answer 1

Answer by Mmmpies · Feb 25, 2015 at 08:33 PM

Just reference the base canvas and use SetActive.

 using UnityEngine.UI;    // add this to the top
 
 public Canvas myCanvas;  // drag teh canvas on here
 
 
 
 void OnMouseDown()
 {
     myCanvas.gameObject.SetActive(true);
 }

You can also Add Component and give the base canvas a Canvas Group and hide the canvas using that if you don't want to use SetActive.

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JHbett · Feb 25, 2015 at 08:59 PM 0

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How do I drag objects from Unity into $$anonymous$$onoDevelop?

Mmmpies · Feb 26, 2015 at 07:35 AM 0

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Sorry hit night time where I am. You dont, put the script onto a gameObject. In this case the door so that On$$anonymous$$ouseDown works, when you highlight that object look in the inspector and the script will be referenced in there. Public variables will be shown so that canvas will appear as an empty slot drag your canvas from the hierarchy to that slot.

Now the best advice I can give is click on the Learn button above and look on Live Training for the tutorial on communicating between scripts and GameObjects it's a great tutorial.

JHbett · Feb 26, 2015 at 11:43 AM 0

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Oooh, I get it. I've got it working now, thanks so much for the help.

Yeah, I've been looking at those tutorials for some of the stuff I've been trying to do, but I need to go through them all properly when I have the time. At the moment I'm just flailing around trying to get my current project semi-functional for a deadline.

Mmmpies · Feb 26, 2015 at 11:51 AM 0

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Glad you got it working, also worth looking into the event system as it's mighty powerful.

Using OnMouseDown (or similar) to toggle worldspace UI (4.6)

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