Find cursor position in a TextArea

Question

Hi guys Im having some troubles adding the ability to use tab spacing in my Text Area.

Im trying to catch the tab event and then use string.Insert() to add the tab into the text, this works as intended except that to use insert as you all probably know you must enter an index value for where the insertion will be.

My question is, How can i find the correct index value for the string in my Text Area based off where the cursor is?

Answer 1

Best Answer

Answer by Statement · Jul 01, 2012 at 02:37 AM

Hi, you can get the TextEditor to get the information you need. Unfortunately this documentation has fallen behind a bit, but check out this example:

 using UnityEngine;
 using System.Collections;
 
 public class GUITextAreaEditorExample : MonoBehaviour
 {
     public string txt = "";
     void OnGUI()
     {
         txt = GUI.TextArea(new Rect(8, 8, 200, 200), txt);
         TextEditor editor = (TextEditor)GUIUtility.GetStateObject(typeof(TextEditor), GUIUtility.keyboardControl);
         
         GUI.Label(new Rect(216, 8, 200, 200), string.Format("Selected text: {0}\nPos: {1}\nSelect pos: {2}",
             editor.SelectedText,
             editor.pos,
             editor.selectPos));
 
         if (GUI.Button(new Rect(8, 216, 400, 20), "Insert Tab"))
             txt = txt.Insert(editor.pos, "\t");
     }
 }

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Preavis · Jul 01, 2012 at 03:09 AM 0

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Thank you so much, I had been playing around with different methods for hours.

This works perfectly and has helped me do so much more then I originally intended.

Just made my day :D

MountDoomTeam · May 10, 2013 at 08:13 PM 0

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is it possible to write it in JS?

Statement · May 19, 2013 at 02:01 PM 0

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@ZoomDomain; yes.

Jean-Fabre · Dec 12, 2014 at 01:11 PM 0

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Warning: using RichText content will make the .pos very messy, most of the time outputing wrong values, especially when content is wrapped or longer than what seems to be a width limit inside Unity GUI system

Answer 2

This is how I do it :

 private int carretPosCode = 0;
     private bool tabCode = false;
     
     TextEditor editor;
 
 
     GUI.SetNextControlName("CodeArea");
     textAreaCode = GUI.TextArea(new Rect(0,0,500,300),textAreaCode);
     
     editor = (TextEditor)GUIUtility.GetStateObject(typeof(TextEditor), GUIUtility.keyboardControl);
         
         if(Event.current.type == EventType.keyDown ){
                                 textAreaCode = textAreaCode.Insert(editor.selectPos, "\t");
                                 carretPosCode = editor.selectPos;
         
         
                             }
     
         
         if ( Event.current.keyCode == KeyCode.Tab && Event.current.type == EventType.keyUp  ) {    
                                 GUI.FocusControl("CodeArea");
                                 Event.current.Use();
                                 tabCode = true;
                             }
         if(tabCode && Event.current.type == EventType.Layout){
                                 editor.pos = carretPosCode+2;
                                 editor.selectPos = carretPosCode+2;
                                 tabCode = false;
                             }

Answer 3

Answer by john-essy · Feb 06, 2019 at 03:43 PM

How does it know which text to pay attention to? I am busy trying to use this for an editor script so that my client can decide which text to make bold, But for some reason it only works when i have this at the top of my OnGUI method. When i try to use this with Data i.e in a custom class like Name, Description etc it always says the selected text is empty?

Is this global or ?

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Find cursor position in a TextArea

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