Unity UI-based cursor

This script allows you to rely on Unity UI to render the cursor, making it possible to add e.g. animation effects. It works by positioning a RectTransform to match the position of the system cursor. It can be used in one of two ways:

1. Modify the texture field of a RawImage component to match the graphic AC wants to set its own cursor to
2. Modify Animator parameters to control playback of animations that control the UI's appearance

To use the script:

1. In the Cursor Manager, set the Cursor rendering field to Hardware
2. Create a new Unity UI Canvas, and either create a RawImage component to act as the cursor, or configure an Animator to change the UI's appearance based on a "ClickID" integer, an "InventoryID" integer, a "CursorIsVisible" boolean, and "Click" trigger.
3. Attach the script below to the Canvas and configure the Inspector to suit your needs.

UnityUICursor.cs:

using UnityEngine;

using System.Collections;

using UnityEngine.UI;

using AC;



public class UnityUICursor : MonoBehaviour

{



    public Texture2D emptyTexture;

    public Animator _animator;

    public string cursorIDIntParameter = "CursorID";

    public string inventoryIDIntParameter = "InventoryID";

    public string cursorVisibleBoolParameter = "CursorIsVisible";

    public string clickTriggerParameter = "Click";



    public RawImage rawImageToControl;

    public RectTransform rectTransformToPosition;







    private void OnEnable ()

    {

        if (KickStarter.cursorManager.cursorRendering == CursorRendering.Software)

        {

            Debug.LogWarning ("Cursor rendering must be set to 'Hardware' for the UnityUICursor script to take effect.");

        }



        EventManager.OnSetHardwareCursor += OnSetHardwareCursor;

    }





    private void OnDisable ()

    {

        EventManager.OnSetHardwareCursor -= OnSetHardwareCursor;

    }





    private void Update ()

    {

        if (_animator != null)

        {

            if (!string.IsNullOrEmpty (cursorIDIntParameter)) _animator.SetInteger (cursorIDIntParameter, KickStarter.playerCursor.GetSelectedCursorID ());

            if (!string.IsNullOrEmpty (inventoryIDIntParameter)) _animator.SetInteger (inventoryIDIntParameter, (KickStarter.runtimeInventory.SelectedItem != null) ? KickStarter.runtimeInventory.SelectedItem.id : -1);



            if (Input.GetMouseButtonDown (0))

            {

                if (!string.IsNullOrEmpty (clickTriggerParameter)) _animator.SetTrigger (clickTriggerParameter);

            }

        }



        if (rectTransformToPosition != null)

        {

            rectTransformToPosition.position = Input.mousePosition;

        }

    }





    private void OnSetHardwareCursor (Texture2D texture, Vector2 clickOffset)

    {

        Cursor.SetCursor (emptyTexture, Vector2.zero, CursorMode.Auto);



        if (rawImageToControl != null)

        {

            rawImageToControl.texture = (texture != null) ? texture : emptyTexture;

        }



        if (_animator != null)

        {

            if (!string.IsNullOrEmpty (cursorVisibleBoolParameter)) _animator.SetBool (cursorVisibleBoolParameter, (texture != null));

        }

    }



}