How to set RectTransform size relative to the size of the textbox?

Hello everyone,

I'm doing a messages sorting system at the moment, for the Console I'm making for my game and currently I ran into one problem. I'm trying to set the message rectTransform size (height) to the size of the text box (TextMeshProUGUI). Similar way ContentSizeFitter works.
Is there a way to get a size of the TextMeshProUGUI textbox?

I tried using (TextBounds and Bounds) size values, but it didn't really helped cause the size value of y for example is enormously huge.

Maybe I'm just missing something. Can someone give some advice on this? Thanks

 

If you want to figure out how much space is required to display the text, you can call GetPreferredValues().

By way of example, here's a script I wrote that controls the size of the attached RectTransform based on the preferred size of a specified TMP text:

Code (CSharp):

1. using UnityEngine;
2. using TMPro;
3.  
4. // Resizes this object based on the preferred size of a TMP Text
5. [ExecuteInEditMode]
6. public class TextSizer : MonoBehaviour
7. {
8.     public TMP_Text text;
9.     public Vector2 padding;
10.     public Vector2 maxSize = new Vector2(1000, float.PositiveInfinity);
11.     public Vector2 minSize;
12.  
13.     public enum Mode
14.     {
15.         None        = 0,
16.         Horizontal  = 0x1,
17.         Vertical    = 0x2,
18.         Both        = Horizontal | Vertical
19.     }
20.     public Mode controlAxes = Mode.Both;
21.  
22.     protected string lastText = null;
23.     protected Vector2 lastSize;
24.     protected bool forceRefresh = false;
25.  
26.     protected virtual float MinX { get {
27.             if ((controlAxes & Mode.Horizontal) != 0) return minSize.x;
28.             return GetComponent<RectTransform>().rect.width - padding.x;
29.         } }
30.     protected virtual float MinY { get {
31.             if ((controlAxes & Mode.Vertical) != 0) return minSize.y;
32.             return GetComponent<RectTransform>().rect.height - padding.y;
33.         } }
34.     protected virtual float MaxX { get {
35.             if ((controlAxes & Mode.Horizontal) != 0) return maxSize.x;
36.             return GetComponent<RectTransform>().rect.width - padding.x;
37.         } }
38.     protected virtual float MaxY { get {
39.             if ((controlAxes & Mode.Vertical) != 0) return maxSize.y;
40.             return GetComponent<RectTransform>().rect.height - padding.y;
41.         } }
42.  
43.     protected virtual void Update ()
44.     {
45.         RectTransform rt = GetComponent<RectTransform>();
46.         if (text != null && (text.text != lastText || lastSize != rt.rect.size || forceRefresh))
47.         {
48.             lastText = text.text;
49.             Vector2 preferredSize = text.GetPreferredValues(MaxX, MaxY);
50.             preferredSize.x = Mathf.Clamp(preferredSize.x, MinX, MaxX);
51.             preferredSize.y = Mathf.Clamp(preferredSize.y, MinY, MaxY);
52.             preferredSize += padding;
53.  
54.             if ((controlAxes & Mode.Horizontal) != 0)
55.             {
56.                 rt.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, preferredSize.x);
57.             }
58.             if ((controlAxes & Mode.Vertical) != 0)
59.             {
60.                 rt.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, preferredSize.y);
61.             }
62.             lastSize = rt.rect.size;
63.             forceRefresh = false;
64.         }
65.     }
66.  
67.     // Forces a size recalculation on next Update
68.     public virtual void Refresh()
69.     {
70.         forceRefresh = true;
71.     }
72. }

 

Great script! And GetPreferredValues() worked flawlessly for me! Thanks.