solved GUI element's visibility/existence

[alexoy]

Hi,

Short question: When we set control.isVisible = false to a GUI element - does that mean, that element still exists, but is fully transparent or it is not being calculated at all (just like setEnabled(false) for meshes)?

Maybe stupid question, I think the second should be correct, but just to clarify

[Wingnut]

https://github.com/BabylonJS/Babylon.js/blob/master/gui/src/2D/controls/control.ts#L469

That might tell things.  :)

control.notRenderable(true), I guess... same as setEnabled(false);  I'm no pro... but... we gotz some evidence.  :)

[alexoy]

@Wingnut,

Seems there is no such function - https://www.babylonjs-playground.com/#1M6B0C

Line 39 doesn't work; line 41 is a private variable, so shouldn't be used (but works); So line 40 is a correct equivalent to setEnabled(false) ? 

[Wingnut]

Well THAT's odd. hmm.

Line 41 works, though, huh?  https://www.babylonjs-playground.com/#1M6B0C#2

[Wingnut]

https://www.babylonjs-playground.com/indexStable.html#1M6B0C#3

Or maybe not.  :)  It won't disable text1 after 5 secs, anyway.

[Wingnut]

Ok, yes it does.  https://www.babylonjs-playground.com/#1M6B0C#4

I forgot to markAssDirty 

[alexoy]

If we skip using internal private variables - this works as expected - https://www.babylonjs-playground.com/indexStable.html#1M6B0C#5

However what do you think about missing function control.notRenderable(true)? It seems public

[Wingnut]

.notRenderable... hunh... yeah, that works fine... good find.

hmm.  I'm really not qualified to "think about" too much.  Let's watch for more-informed answers about .notRenderable().

Off the top of my head, I would say... that the source code we are looking-at... is NOT "for" the current build that's being used in the playground.

Speculation, though.  I'm really only qualified to help with simple things.  You are asking complicated things that I USUALLY answer incorrectly (Wingnut foot in mouth) 

[Guest]

Hello team!!

this should be in the doc, my bad

* notRenderable will only hide (not draw) the current control

* isVisibile = false will not render the control and all its children

[alexoy]

notRenderable is ignored if label is linked with a mesh, should it be like that? isVisible still works.

@Deltakosh, by children you mean cases like when there is a GUI rectangle and a GUI label attached to it, so label is a child of the rect.?

[Wingnut]

@alexoy - I don't think "attached" is a good word to use, there.  "added" is better.  Notice which controls are containers, and which not.  Also, as you use BJS GUI more and more, you will do console.log(somecontainer.children), fairly often, especially if you like to examine GUI controls in the browser F12 dev-tools OBJECT INSPECTOR.  There, you just click the children property and you can see all the controls that you have "added" to a container, or to the ADT itself, which is also a container, of course.

But yes, your example is correct.  Rectangle is a container... often used to put a border around anything inside.  But stackpanels, too... and later... if you build GUI tables/lists... you'll likely have vertical stackpanels full of horizontal stackpanels full of rectangles full of (user-interaction/content-)controls.  Containers of containers of containers... ad nauseum. 

That's my take.  Delta might have different words.

[Guest]

@Wingnut is correct