Way to tell if an int has been changed

Question

is there a way to tell if an int has changed? or a string for that matter?

basically I am using textfields to change variables but when those variables get changed I need to know so that I can change another variable to a different number

how do I tell if a variable has changed or if a textfield has been edited?

Answer 1

Answer by DaveA · Mar 10, 2011 at 04:19 AM

The GUI text fields should be updating as they are changed, that should be automatic, but in general, something like this:

var myInt : int = 0; private var last_myInt : int = 0;

function Update()
{
    if (last_myInt != myInt)
    {
        DoSomething();
        last_myInt = myInt;
    }
}

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QuestionBro 5 · Mar 10, 2011 at 04:22 AM 0

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The Textfields are updating fine, I am just looking to change a different variable when the user decides to change the variable in the Textfield (I have allot of Textfields and using a different variable solely for each one will get ridiculously large quickly) any simple function like textfield.haschanged? or way of doing something like that?

DaveA · Mar 10, 2011 at 05:40 AM 0

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If you check the code on this page: http://unity3d.com/support/documentation/ScriptReference/GUI.TextField.html The example shows exactly this. The assignment occurs when the user changes the text. Otherwise, use something like what I have (above) but using a string ins$$anonymous$$d of an int.

QuestionBro 5 · Mar 10, 2011 at 06:37 AM 0

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var stringToEdit : String = "Hello World";

function OnGUI () { // $$anonymous$$ake a text field that modifies stringToEdit. stringToEdit = GUI.TextField (Rect (10, 10, 200, 20), stringToEdit, 25); }

that part is working completely fine, what I want to happen is when the user enters a variable into the text I want a CO$$anonymous$$PLETELY different variable to be changed to something CO$$anonymous$$PLETELY DIFFERENT that just changes a variable to what the user typed in

DaveA · Mar 10, 2011 at 07:46 AM 0

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Yeah same type of thing. See what yoyo has spelled out below

Answer 2

Answer by yoyo · Mar 10, 2011 at 06:00 AM

I would do as DaveA suggests, though I would put the check into OnGUI where you edit the value, rather than in Update. Something like (C#, untested) ...

public string myString;

void OnGUI()
{
    string newString = GUI.TextField(myString);
    if (myString != newString)
    {
        myString = newString;
        DoSomething();
    }
}

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Answer 3

Answer by Gabriel 4 · Mar 24, 2011 at 02:15 PM

In C# you can use properties.

int myNumber = 5; // Your actual number

int MyNumber { get { return myNumber; } set { NumberChanged(myNumber, value); myNumber = value; } }

void NumberChanged(int oldValue, int newValue) { // Do stuff }

In your GUI code use MyNumber instead of myNumber. When the value is changed the NumberChanged function will be called.

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Answer 4

Answer by BerggreenDK · Jul 29, 2011 at 07:13 PM

Have you tried this approach?

http://unity3d.com/support/documentation/ScriptReference/GUI-changed.html

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Way to tell if an int has been changed

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