DpiEventSystemDragThreshold.cs

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

public class DpiEventSystemDragThreshold : MonoBehaviour
{
	public int referenceDPI = 100;
	public float referencePixelDrag = 8f;
	public bool verbose = true;

	void Awake()
	{
		UpdateDragThreshold( Screen.dpi );
	}

	public void UpdateDragThreshold(float screenDpi)
	{
		EventSystem eventSystem = GetComponent<EventSystem>();
		if (eventSystem == null) {
			Debug.LogWarning("Missing EventSystemComponent on DpiEventSystemDragThreshold", this);
		}

		eventSystem.pixelDragThreshold = Mathf.RoundToInt(screenDpi/ referenceDPI*referencePixelDrag);

		if( verbose ) {
			Debug.Log( "DpiEventSystemDragThreshold set to: " + eventSystem.pixelDragThreshold + ", for dpi: " + screenDpi + ", reference: " + referencePixelDrag + " / " + referenceDPI );
		}
	}
}