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Setting UMG navigation rules at runtime

I have a very simple menu to browse through a gallery of images, containing buttons for "Previous Image", "Next Image" and "Back out of this Menu". In the graph for this menu widget, I disable the Prev and Next buttons when the ends of the gallery are reached.

Disabled buttons still accept keyboard focus, which is not ideal for the user in this case, so I've tried to work around this by changing the navigation rules whenever a button is enabled or disabled, using "Set Navigation Rule".

https://docs.unrealengine.com/latest/INT/BlueprintAPI/Widget/SetNavigationRule/index.html

alt text

However, it seems that none of the changes I make using this function actually work. I can see that the navigation rules point to the correct widgets if I print them out using Get Navigation, but the actual behaviour when I attempt to navigate using the keyboard is always unchanged from the initial rules set when the widget was first created. Is there an obvious reason why this isn't working?

Alternatively, is there a way to disable and enable "Is focusable" for buttons at runtime?

Product Version: UE 4.17
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asked Sep 11 '17 at 04:50 PM in Blueprint Scripting

avatar image

AAWarp
6 1 1 2

avatar image Ciaviel Oct 02 '17 at 04:57 PM

Same Issue here, have you found a solution?

avatar image OmicronNEGA Oct 24 '17 at 01:11 AM

I got the same problem here too. Seems like this node is broken somehow?

avatar image vodkins Apr 04 '18 at 09:12 AM

Same issue here! Just nothing happens using it... Looks like this node is broken.

avatar image gk0r Apr 04 '18 at 02:25 PM

What is the real world problem you guys are trying to solve? If you want to stop user from pressing Left or Right when you reach the bounds, consider toggling visibility using Set Visibility node. That will address your issue with focus as well. If you choose Collapsed it will not appear at all (good outcome) or if you choose Hit Test Invisible it will become non-interactive.

What is the problem?

avatar image vodkins Apr 04 '18 at 03:09 PM

My problem is that i have an additional focusable Widget which can be Visible or not alongside with other Widget (Main Menu buttons). Additional Widget is located above/upper the Main Widget. So when additional Widget is Hidden/Collapsed i can navigate from upper Main Menu button (Resume) to lower one (Quit) and vise versa (cross navigation in circle in both ways Up and Down). But when i Open additional Widget and Close it then i can't circle Up from Resume to Quit. It just stops. I don't know why. I tried both Hidden and Collapsed but this is not helped.

avatar image gk0r Apr 05 '18 at 12:14 PM

Re-create the problem in a blank project and upload it to Google Drive. I'll have a look for you.

avatar image vodkins Apr 05 '18 at 03:23 PM

Ok, i will try, but this is not so a big problem to spend our time for that. Anyway thank you!

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