UI Navigation with gamepad

@grasmann

Hi, I had this problem as well and after messing around a bit with the Input Manager I found a solution.

for the Horizontal and Vertical entries in your Input Manager that you are using in your event system, set the following values(not sure if all are these are necessary but this is what worked for me): Gravity: 10, Dead: 0.9, Sensitivity 4, and uncheck snap

for your standalone input module set input actions for second to 4 and repeat delay to 0.25

I'm pretty sure the most important of the settings above is to have Dead: 0.9, it seems that when the deadzone is too small the standalone input module doesn't work too well.

If you are using Input Manager for gameplay with the analog sticks make sure these UI settings are a different horizontal/vertical entry in the Input Manager so they don't conflict with your gameplay control.

@grasmann @mccameron

I also have this problem. It is a bug in unity 5. The buggy code is open-source, so I wrote a fix for it. The fix only works for 5.2.2f1.

Mccameron's solution is the easiest fix by far, but the bug can still sometimes happen.

Installing my fix is a pain and requires a bit of technical knowhow:

1. Download the updated source from https://bitbucket.org/odomobo/ui/get/5.2.zip . You can also view my commit on bitbucket, if you desire.

2. Compile the source code in MonoDevelop/Visual Studio, as per the README.md file.

3. Install the compiled DLLs by copying them to the correct directory (Unity\Editor\Data\UnityExtensions\Unity\GUISystem in Windows, Unity.app/Contents/UnityExtensions/Unity/GUISystem in OSX)

If you don't want to go through all of those steps, you can download the DLLs I compiled, and you can skip straight to step 3 as per above: https://www.dropbox.com/s/utn4cqpsnak4ipv/GUISystem_5.2.2f1.zip?dl=0

I hope unity incorporates my fix into their next release.

The issue is fixed for me in 3.3.1p2 You may have to download it manually if it's not showing up in your Editor's update option yet.

For those using an older version of Unity (like me), here's another fix:

First make unique inputs for the gamepad in the input manager; they need to be named different, like "VerticalDpad" and "HorizontalDpad".

Create a new script that you will attach to your EventSystem object. The script will handle the selection of buttons only if gamepad inputs are used. It should look like this:

 using System.Collections;
 using UnityEngine;
 using UnityEngine.UI;
 using UnityEngine.EventSystems;
 
 public class EventSystemXboxDPadInputs : MonoBehaviour
 {
     private GameObject currentButton;
     private AxisEventData currentAxis;
     //timer
     private float timeBetweenInputs = 0.15f; //in seconds
     private float timer = 0;
 
     void Update()
     {
         if(timer == 0)
         {
             currentAxis = new AxisEventData (EventSystem.current);
             currentButton = EventSystem.current.currentSelectedGameObject;
 
             if (Input.GetAxis("VerticalDpad") > 0) // move up
             {
                 currentAxis.moveDir = MoveDirection.Up;
                 ExecuteEvents.Execute(currentButton, currentAxis, ExecuteEvents.moveHandler);
                 timer = timeBetweenInputs;
             }
             else if (Input.GetAxis("VerticalDpad") < 0) // move down
             {
                 currentAxis.moveDir = MoveDirection.Down;
                 ExecuteEvents.Execute(currentButton, currentAxis, ExecuteEvents.moveHandler);
                 timer = timeBetweenInputs;
             }
             else if (Input.GetAxis("HorizontalDpad") > 0) // move right
             {
                 currentAxis.moveDir = MoveDirection.Right;
                 ExecuteEvents.Execute(currentButton, currentAxis, ExecuteEvents.moveHandler);
                 timer = timeBetweenInputs;
             }
             else if (Input.GetAxis("HorizontalDpad") < 0) // move left
             {
                 currentAxis.moveDir = MoveDirection.Left;
                 ExecuteEvents.Execute(currentButton, currentAxis, ExecuteEvents.moveHandler);
                 timer = timeBetweenInputs;
             }
         }
 
         //timer counting down
         if(timer > 0){timer -= Time.deltaTime;}else{timer = 0;}
     }
 }

You can change the time between input by changing the value of "timeBetweenInputs".

Using Unity 2018 with InControl, so I can't exactly use the fix above, but it's a matter of setting the RepeatDelay in the Input Manager juuust right.