mixedcards/Assets/Battle/BattleParticipantSprite.cs

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

public class BattleParticipantSprite : MonoBehaviour
{
    public delegate void SpriteClickedAction(BattleParticipant participant);
    public event SpriteClickedAction OnSpriteClicked;

    private BattlePlayerControls playerControls;
    private BattleParticipant participant;

    public void Init(BattlePlayerControls playerControls, BattleParticipant participant) {
        this.playerControls = playerControls;
        this.participant = participant;
    }

    // Start is called before the first frame update
    void Start() {
        gameObject.AddComponent<BoxCollider2D>();
    }

    // Update is called once per frame
    void Update() {
        if (colorChanged && !this.playerControls.CouldTarget(participant)) {
            OnMouseExit();
        }
    }

    void OnMouseDown() {
        OnSpriteClicked(participant);
    }

    private Color savedColor;
    private bool colorChanged;

    void OnMouseEnter() {
        if (this.playerControls.CouldTarget(participant)) {
            SpriteRenderer sprite = GetComponent<SpriteRenderer>();
            this.savedColor = sprite.color;
            sprite.color = Color.Lerp(this.savedColor, Color.white, .5f);
            this.colorChanged = true;
        }
    }

    void OnMouseExit() {
        if (this.colorChanged) {
            SpriteRenderer sprite = GetComponent<SpriteRenderer>();
            sprite.color = this.savedColor;
            this.colorChanged = false;
        }
    }
}