Hiding element in nifty gui

Troubleshooting gui
1

is it possible to hide an element and have its siblings flow to take its place?
i have tried
someElement.setVisible(false);
someElement.getParent().layoutElements();
but it did not produced desired effect (there is still empty space where the element was)
is this even the correct way to do it?

2

Hiding it doesn’t remove it from the screen graph. I would remove the elements and add them back in later.

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3

thank you, got it working with
Nifty.removeElement(Screen screen, Element element)
although i’m questioning what is the purpose of Element.markForRemoval() other than to rip your head off in despair, because i could not get it to work without causing an exception nor could i find a workig example how to use it.

4

markForRemoval() is the correct way to do it. What is the exception you get?

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5

WARNING: Root Cause: java.lang.NullPointerException
Feb 05, 2015 2:26:22 AM de.lessvoid.nifty.NiftyMethodInvoker logException
WARNING: de.lessvoid.nifty.elements.Element onEndScreen (Element.java:2280)

nifty 1.3

6

You need the full stack trace. What element are you trying to remove?

7

I finally managed to figure it out. I was using Nifty.gotoScreen(String id) AND Element.markForRemoval() in the same non concurrent code block witch was invoked by onClick event.

Since i wanted to modify gui when moving between screens, i moved Element.markForRemoval() to ScreenController.bind(Nifty nifty, Screen screen) and everything works fine.