Problem on updating material properties on UI2DSprite's onRender

[MildMania]

Hello there,

I'm trying to assign a material to UI2DSprite on the run and update the material properties. Weird things is, it's only working if I change the parent of objects so I believe when I change the parent it somehow updates something about how widget is drawing and starts to use new material.
I couldn't do it manually, tried MarkAsChanged, MarkParentChanged and all other stuff. Only way to get it working now is when I change the parent of the object. Am I doing something wrong here?

You can find the code below.

1. using UnityEngine;
2. using DG.Tweening;
3.  
4. public class MaterialBlinkColor
5. {
6.     public bool ShouldContinue { get; set; }
7.     Tweener _curTween;
8.     Material _material;
9.     Material _defaultMaterial;
10.     UI2DSprite _sprite;
11.     string _property;
12.  
13.     public MaterialBlinkColor(UI2DSprite sprite, Material material)
14.     {
15.         ShouldContinue = true;
16.         _defaultMaterial = new Material(material);
17.         _sprite = sprite;
18.         _material = new Material(material);
19.         _sprite.material = _material;
20.         BlinkSmoothly("_AddColor", _material.GetColor("_AddColor"), new Color(0.85f, 0.85f, 0.85f, 0), 1f);
21.         //_sprite.MarkAsChanged();
22.         //_sprite.SetDirty();
23.         //NGUITools.MarkParentAsChanged(_sprite.transform.parent.gameObject);
24.     }
25.  
26.     public void BlinkSmoothly(string property, Color startColor, Color endColor, float totalDuration, bool runOnce = false)
27.     {
28.         //_sprite.GetComponent<Rigidbody2D>().isKinematic = true;
29.         //_sprite.transform.parent = _sprite.root.transform;
30.  
31.         _sprite.onRender = OnRender;
32.         _property = property;
33.         if (ShouldContinue)
34.         {
35.             _curTween = _material.DOColor(endColor, _property, totalDuration / 2)
36.                 .OnComplete(new TweenCallback(() => BlinkSmoothly(_property, endColor, startColor, totalDuration, runOnce)))
37.                 .SetEase(Ease.InOutCubic);
38.             ShouldContinue &= !runOnce;
39.         }
40.     }
41.  
42.     void OnRender(Material mat)
43.     {
44.         if (!ShouldContinue)
45.         {
46.             _sprite.onRender = null;
47.             _material = _defaultMaterial;
48.         }
49.         mat.SetColor(_property, _material.GetColor(_property));
50.     }
51. }
52.  

Thanks,
Burkay

[ArenMook]

If you want to change the material properties of a widget, you need to use the UIWidget.onRender callback. It passes the material as a property. NGUI makes copies of materials it works with.