Passing information between Dialogue Tree and Scene

[cgraf062491Participant]

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using NodeCanvas.Framework; using ParadoxNotion.Design; using NodeCanvas.DialogueTrees; using UnityEngine; using UnityEngine.UI; using System.Collections.Generic;   namespace NodeCanvas.Tasks.Actions {     [Icon("InputField", IconAttribute.Mode.AppendToTitle)]     [Category("Dialogue")]     [Description("Input field which is filled by player")]     public class RequestInputField : ActionTask     {         [SerializeField]         public List<InputFieldAttributes> inputFields = new List<InputFieldAttributes>();           private MultipleInputFieldRequestInfo inputFieldInfo;         private int numOfInputFieldGroups;         private int inputFieldGroupsCounter;           protected override void OnExecute()         {             numOfInputFieldGroups = inputFields.Count % 3 == 0 ? (inputFields.Count / 3) : (inputFields.Count / 3) + 1;               inputFieldInfo = new MultipleInputFieldRequestInfo(inputFields, numOfInputFieldGroups, true, OnInputFieldFills);               List<Node> parentNodes = DialogueTree.GetCurrentNode().GetParentNodes();             inputFieldInfo.showLastStatement = parentNodes.Count > 0 && parentNodes[0] is StatementNode;         }           protected override void OnUpdate()         {             if (inputFieldGroupsCounter < numOfInputFieldGroups)             {                 if (!inputFieldInfo.isNext)                 {                     return;                 }             }               if (inputFieldInfo.isNext)             {                 inputFieldInfo.isNext = false;                 inputFieldGroupsCounter++;                 inputFieldInfo.counter = inputFieldGroupsCounter;                 DialogueTree.RequestInputFields(inputFieldInfo);             }         }           public void OnInputFieldFills()         {             EndAction(true);         }     } }

Here is my action task. I have a separate method to EndAction that I want to call in a different script that looks like this.

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using System.Collections; using System.Collections.Generic; using NodeCanvas.Framework; using NodeCanvas.Tasks.Actions; using UnityEngine;   public class EndAction : MonoBehaviour {   public RequestInputField testbuttonscript;   public void MoveOn(){   testbuttonscript.OnInputFieldFills(); } }

I keep getting that Null reference exception, so I guess my question is, how do I reference the action I want to end, if EndAction() only takes a bool?

[GavalakisKeymaster]

Hello again,

I think it would be better if you try to achieve what you want by using some sort of static events, in which the ActionTask can subscribe to instead of trying to get a reference to the action task object itself.

Here is a very rough example of what I mean:

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public class Example : MonoBehaviour{       public static event Action onMoveOn;       public static void MoveOn(){         if (onMoveOn != null){             onMoveOn();         }     } }

You could also turn the above example into some kind of a “manager” if you’d like.

Then in your action tasks, you could subscribe to the event in the OnExecute method like this:

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Example.onMoveOn += ()=> { EndAction(); }

This way, and by using events in general, you don’t have to worry about referencing everything. 🙂

Let me know if that works for you.
Thanks.

[cgraf062491Participant]

Hello,

Sorry for the late reply, but I have been working a lot because that finally did it! Thanks so much for all your help.

[Author]

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