Scriptum/Assets/Scripts/Task/TaskPanelController.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
using System; 

public class TaskPanelController : MonoBehaviour
{
    [Header("Panel Information")]
    [SerializeField] protected GameObject _panelContent;
    [SerializeField] private TaskBox taskbox_template;
    [SerializeField] private List<TaskBox> taskBox_list;

    protected void InitPanelBoxes(List<Task> _tasks)
    {
        if(_panelContent)
        {
            for(int i = 0; i < _tasks.Count; i++)
            {
                this.AddTask(_tasks[i]);
            } 
        }
    }

    protected TaskBox SetupTaskBox(Task _task)
    {
        TaskBox _newTaskBox = Instantiate(taskbox_template, _panelContent.transform.position, Quaternion.identity).GetComponent<TaskBox>();

        _newTaskBox.transform.SetParent(_panelContent.transform);

        _newTaskBox.transform.localScale = new Vector3(2.5f, 2.5f, 1.0f);

        _newTaskBox.SetTask(_task);

        return _newTaskBox;
    }

    public void Setup(List<Task> _tasks)
    {
        this.InitPanelBoxes(_tasks);
    }

    public void AddTask(Task _task)
    {
        // update TaskManager main list of task
        //TaskManager.Instance.AddTask(_task);

        // add task to local panel contant
        TaskBox newTaskBox = SetupTaskBox(_task);
        
        // Set new Slot instance
        taskBox_list.Add(newTaskBox);
    }
}