Inspiring

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HTML5 Canvas JS: Store Path to Dynamic text as Variable?

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Writing this out every time for the numerous click functions I have seems a bit redundant:

exportRoot.TXT_add.text = "Some Value";
exportRoot.TXT_ext.text = "Another Value";

This would be tidier:

ADDR = "Some Value";
EXT = "Another Value";

There must be some way to do this, but I can't find anything on the topic.
This is my attempt:

var ADDR = exportRoot.TXT_add.text;
var EXT = exportRoot.TXT_ext.text;

clear_INFO=function(){
ADDR = " ";
EXT = " ";
	}

clear_INFO();

That should clear the content of the Dynamic text objects, but it does nothing. And it also does not produce a console error, shouldn't it?

Is this sort of thing simply not possible? Looking for clues, thanks.

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JoãoCésar17023019Correct answer

Community Expert

Hi.

The .text is a property of a text field and not the text field itself. So when you store a reference to it you only storing a reference to a primitve value.

What you can do is to store references to the text fields themselves like this:

var addTF = exportRoot.TXT_add;
var extTF = exportRoot.TXT_ext;

Them set their texts properties like this:

addTF.text = "";
extTF.text = "";

Regards,

JC

JoãoCésar17023019

Correct answer

Community Expert

Hi.

The .text is a property of a text field and not the text field itself. So when you store a reference to it you only storing a reference to a primitve value.

What you can do is to store references to the text fields themselves like this:

var addTF = exportRoot.TXT_add;
var extTF = exportRoot.TXT_ext;

Them set their texts properties like this:

addTF.text = "";
extTF.text = "";

Regards,

JC

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Jeffery.WrightAuthor

Inspiring

Thanks man, at least I was close... I wonder why the variable can't store .text as part of the complete path to the object?

To me, intuitively, I would think the variable

ADDR = exportRoot.TXT_add.text;

would mean, that ADDR would be the same value as exportRoot.TXT_add.text and equating it with a string, would be exactly like

exportRoot.TXT_add.text = "Some Value";

Variables then cannot refer to the property of the object at the end of its path? That sure would be useful.

Thanks again!

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kglad

Community Expert

the text property to a textfield isn't different from the x property of an object. ie, if you store the x property, you're storing nothing about the object.

if you want to store a reference to the object, do exactly that and do not store a property of the object (unless that's you want to access, the property).

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kglad

Community Expert

it's not clear what you're trying to do unless you have more than 2 textfields. do you?

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Jeffery.WrightAuthor

Inspiring

Any number of text fields, is there a way to store the path to them in a variable?

There are two in my example, thanks.

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kglad

Community Expert

you can use bracket notation to coerce strings to objects.

var s = "add"

exportRoot[TXT_ + s].text = whatever;

this is typically used with arrays (or more perceptive object names) and for-loops.

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