DisplayFacts.cs

using System.Collections.Generic;
using UnityEngine;
using TMPro;
using System;
using static CommunicationEvents;

public class DisplayFacts : MonoBehaviour
{
    public Dictionary<string, GameObject> displayedFacts = new Dictionary<string, GameObject>();

    public GameObject prefab_Point;
    public GameObject prefab_Distance;
    public GameObject prefab_Angle;
    public GameObject prefab_Default;
    public GameObject prefab_OnLine;
    public GameObject prefab_Line;

    public Dictionary<string, GameObject> prefabDictionary;

    public int x_Start;
    public int y_Start;
    public int X_Pacece_Between_Items;
    public int y_Pacece_Between_Items;
    public int number_of_Column;

    //Start is called before the first frame update
    void Start()
    {
        var rect = GetComponent<RectTransform>();
        x_Start = (int)(rect.rect.x + X_Pacece_Between_Items * .5f);
        y_Start = (int)(-rect.rect.y - y_Pacece_Between_Items * .5f);//);
        number_of_Column = Mathf.Max(1, (int)(rect.rect.width / prefab_Point.GetComponent<RectTransform>().rect.width) - 1);

        AddFactEvent.AddListener(AddFact);
        AnimateExistingFactEvent.AddListener(AnimateFact);

         prefabDictionary = new Dictionary<string, GameObject>() {
            {"PointFact", prefab_Point},
            {"LineFact", prefab_Distance},
            {"RayFact", prefab_Line},
            {"AngleFact", prefab_Angle},
            {"OnLineFact", prefab_OnLine}
        };
    }

    public void AddFact(Fact fact) {
        int fid = fact.Id;
        var obj = CreateDisplay(transform, fact);
        obj.GetComponent<RectTransform>().localPosition = GetPosition(fid);
        displayedFacts.Add(fact.backendURI, obj);
    }

    public void AnimateFact(Fact fact) {
        var factIcon = displayedFacts[fact.backendURI];
        factIcon.GetComponentInChildren<ImageHintAnimation>().AnimationTrigger();
    }

    string getLetter(int Id) {
        return ((Char)(64 + Id + 1)).ToString();
    }

    private GameObject CreateDisplay(Transform transform, Fact fact)
    {
        return fact.instantiateRepresentation(prefabDictionary[fact.GetType().Name], transform);
    }

    public Vector3 GetPosition(int i)
    {
        return new Vector3(x_Start + (X_Pacece_Between_Items * (i % number_of_Column)), y_Start + (-y_Pacece_Between_Items * (i / number_of_Column)), 0f);
    }

}