[Script] Simple script that automatically adjust anchor to GUI object size (Rect Transform)

I have been playing around with the new GUI in 4.6. I have found out that there is no automation that allows the user to surround a GUI object (panel, button, etc.) with anchors on all sides. This would effectively make GUI object scales and stay at the same position relatively to the screen size. Therefore, I wrote a simple script that help me do that, hope this help,

Note: This only applies to GUI object with parents.. do not apply it on the root canvas

Code (CSharp):

1. using UnityEditor;
2. using UnityEngine;
3. using System.Collections;
4.  
5. public class UGUIMenu : MonoBehaviour
6. {
7.     [MenuItem ("UI/Anchor Around Object")]
8.     static void uGUIAnchorAroundObject()
9.     {
10.         var o = Selection.activeGameObject;
11.         if (o != null && o.GetComponent<RectTransform>() != null)
12.         {
13.             var r = o.GetComponent<RectTransform>();
14.             var p = o.transform.parent.GetComponent<RectTransform>();
15.            
16.             var offsetMin = r.offsetMin;
17.             var offsetMax = r.offsetMax;
18.             var _anchorMin = r.anchorMin;
19.             var _anchorMax = r.anchorMax;
20.            
21.             var parent_width = p.rect.width;      
22.             var parent_height = p.rect.height;  
23.            
24.             var anchorMin = new Vector2(_anchorMin.x + (offsetMin.x / parent_width),
25.                                         _anchorMin.y + (offsetMin.y / parent_height));
26.             var anchorMax = new Vector2(_anchorMax.x + (offsetMax.x / parent_width),
27.                                         _anchorMax.y + (offsetMax.y / parent_height));
28.            
29.             r.anchorMin = anchorMin;
30.             r.anchorMax = anchorMax;
31.            
32.             r.offsetMin = new Vector2(0, 0);
33.             r.offsetMax = new Vector2(1, 1);
34.             r.pivot = new Vector2(0.5f, 0.5f);
35.            
36.         }
37.     }
38. }
39.  

 

Hi thank you for script but you should change this : r.offsetMax = new Vector2(1, 1);
into this r.offsetMax = new Vector2(0, 0); overwise ui element scales slitly and after performing this script
several times ui element complitly changes it size .

 

Awesome! Thank you so much to both of you! This is going to save me lots of time adjusting anchors!

 

Thank you very much! I have tested it on Unity 5.3.4f1 and it works perfectly.
This is the tool number one for me, I am really happy for your kindness

 

Works great for me too! I'm using it at runtime to readjust after dragging an element - much cleaner than the mess I started writing

 

This is really awesome, thank you

 

5.6.0. Works like a charm, and just saved me hours of work aligning everything correctly. Cheers!

 

I would also add:

Code (csharp):

1. Undo.RecordObject(r, "Set anchors around object");

under line 13 so that undo/redo works and Unity also recognises that the scene is dirty!

 

Works perfectly with Unity 2017 3.03f! Thanks for the awesome script!

 

omg i love you!!

 

can't believe there's still no default

 

Great code, but how should I modify the code to let the sub UI element preserve it's size or ratio when screen size changed?

 

This looks nasty but it works for my needs, just change

Code (CSharp):

1. r.anchorMin = anchorMin;
2. r.anchorMax = anchorMax;
3.  
4. r.offsetMin = new Vector2(0, 0);
5. r.offsetMax = new Vector2(1, 1);

to:

Code (CSharp):

1. r.anchorMin = (anchorMin+anchorMax)/2;
2. r.anchorMax = (anchorMin+anchorMax)/2;
3.  
4. Vector2 objSize = r.offsetMax-r.offsetMin;
5. r.offsetMin = -objSize/2;
6. r.offsetMax = objSize/2;

you can preserve element aspect ratio

 

Great work!

However, I would change the line "r.offsetMax = new Vector2(1, 1);" to "r.offsetMax = new Vector2(0, 0);"

 

7 years later. Still a wonderful script that I am infuriated Unity doesn't have by default.

 

Thanksss!!!!!!!!)

 

Man You just save my time Thanks <3

 

I made it work with multiple selections and made edits suggested by others in the comments. The final version seems to work great.

Code (CSharp):

1. using UnityEditor;
2. using UnityEngine;
3.  
4. public class AnchorSnapper : MonoBehaviour
5. {
6.     [MenuItem ("UI/Snap Anchor Around Object")]
7.     static void uGUIAnchorAroundObject()
8.     {
9.         var oList = Selection.gameObjects;
10.         for (int i = 0; i < oList.Length; i++)
11.         {
12.             var o = oList[i];
13.             if (o != null && o.GetComponent<RectTransform>() != null)
14.             {
15.                 var r = o.GetComponent<RectTransform>();
16.                 Undo.RecordObject(r, "Set anchors around object");
17.                 var p = o.transform.parent.GetComponent<RectTransform>();
18.        
19.                 var offsetMin = r.offsetMin;
20.                 var offsetMax = r.offsetMax;
21.                 var _anchorMin = r.anchorMin;
22.                 var _anchorMax = r.anchorMax;
23.        
24.                 var parent_width = p.rect.width;  
25.                 var parent_height = p.rect.height;
26.        
27.                 var anchorMin = new Vector2(_anchorMin.x + (offsetMin.x / parent_width),
28.                     _anchorMin.y + (offsetMin.y / parent_height));
29.                 var anchorMax = new Vector2(_anchorMax.x + (offsetMax.x / parent_width),
30.                     _anchorMax.y + (offsetMax.y / parent_height));
31.        
32.                 r.anchorMin = anchorMin;
33.                 r.anchorMax = anchorMax;
34.              
35.                 r.offsetMin = new Vector2(0, 0);
36.                 r.offsetMax = new Vector2(0, 0);
37.              
38.                 r.pivot = new Vector2(0.5f, 0.5f);
39.             }
40.         }
41.     }
42. }

 

You can also add

MenuItem("CONTEXT/RectTransform/Anchor Current Position")]

to add a context menu to right click. Honest I can't imagine doing it via the Menu item as that seems tedious.
I've also added another function to Fill Parent which is another common task.
Script doesn't need to be a monobehaviour either

Code (CSharp):

1.  
2. using UnityEditor;
3. using UnityEngine;
4.  
5.     public class RectTransformSnapAnchors
6.     {
7.         [MenuItem("Tools/UI/Anchor Around Object")]
8.         [MenuItem("CONTEXT/RectTransform/Anchor Current Position")]
9.         static void uGUIAnchorAroundObject()
10.         {
11.             foreach (GameObject o in Selection.gameObjects)
12.             {
13.                 if (o == null)
14.                 {
15.                     return;
16.                 }
17.  
18.                 var r = o.GetComponent<RectTransform>();
19.  
20.                 if (r == null || r.parent == null)
21.                 {
22.                     continue;
23.                 }
24.  
25.                 Undo.RecordObject(o, "SnapAnchors");
26.                 AnchorRect(r);
27.             }
28.         }
29.  
30.         static void AnchorRect(RectTransform r)
31.         {
32.             var p = r.parent.GetComponent<RectTransform>();
33.  
34.             var offsetMin = r.offsetMin;
35.             var offsetMax = r.offsetMax;
36.             var _anchorMin = r.anchorMin;
37.             var _anchorMax = r.anchorMax;
38.  
39.             var parent_width = p.rect.width;
40.             var parent_height = p.rect.height;
41.  
42.             var anchorMin = new Vector2(_anchorMin.x + (offsetMin.x / parent_width),
43.                                         _anchorMin.y + (offsetMin.y / parent_height));
44.             var anchorMax = new Vector2(_anchorMax.x + (offsetMax.x / parent_width),
45.                                         _anchorMax.y + (offsetMax.y / parent_height));
46.  
47.             r.anchorMin = anchorMin;
48.             r.anchorMax = anchorMax;
49.  
50.             r.offsetMin = new Vector2(0, 0);
51.             r.offsetMax = new Vector2(0, 0);
52.             r.pivot = new Vector2(0.5f, 0.5f);
53.         }
54.  
55.         [MenuItem("CONTEXT/RectTransform/Fill Parent")]
56.         static void FillParent()
57.         {
58.             RectTransform rect = Selection.activeTransform.GetComponent<RectTransform>();
59.  
60.             rect.anchorMin = Vector2.zero;
61.             rect.anchorMax = Vector2.one;
62.             rect.sizeDelta = Vector2.zero;
63.         }
64.     }
65.  

[/ICODE]

 

Thank man!!! This scripts is very good!!!