powerfun-unity/Assets/Scripts/UI/Control/PFUISlider.cs

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

public class PFUISlider : MonoBehaviour
{
    private Text text;
    private Slider slider;
    public System.Func<float, float> valueHandler = (a) => a * 100;
    private List<Color> colorGradientList;
    private void Awake()
    {
        text = transform.Find("Text").GetComponent<Text>();
        slider = transform.GetComponent<Slider>();
        //text.text = $"{(slider.value * 100).ToString("#0")}";
        //slider.onValueChanged.AddListener((f) =>
        //{
        //    text.text = $"{valueHandler(f).ToString("#0")}";
        //});
        colorGradientList = SetColorGradient(new List<Color> 
        {
            Utils.HexToColorHtml("#ffffff"),
            Utils.HexToColorHtml("#27DFE3"),
            Utils.HexToColorHtml("#27E363"),
            Utils.HexToColorHtml("#E3D427"),
            Utils.HexToColorHtml("#E33B27"),
        }, 
        new List<int> 
        {
            50,50,100,100
        });
    }
    public bool runCallback = false;
    public void SetValueChanged(System.Action<float> a)
    {
        this.ValueChangedHandler = a;
        slider = transform.GetComponent<Slider>();
        slider.onValueChanged.RemoveAllListeners();

        UIManager.AddEvent(slider.gameObject, EventTriggerType.EndDrag, (e) =>
        {
            OnValueChanged();
        });

        slider.onValueChanged.AddListener((f) =>
        {
            current = f;
        });
    }

    float current;
    System.Action<float> ValueChangedHandler;

    private void OnValueChanged()
    {
        float f = current;
        var step = 1f / (colorGradientList.Count - 1);
        var index = (int)Math.Round(f / step, 0);
        slider.targetGraphic.color = colorGradientList[index];
        text.text = $"{valueHandler(f):#0}";
        this.ValueChangedHandler?.Invoke(f);
    }
    public void SetValue(float a) 
    {
        a = a > 1 ? 1 : a;
        a = a < 0 ? 0 : a;
        slider.value = a;
        OnValueChanged();
    }

    public float GetValue()
    {
        return slider.value;
    }

    public List<Color> SetColorGradient(List<Color> list, int divideCount) 
    {
        var res = new List<Color>();
        for (int i = 0; i < list.Count - 1; i++) 
        {
            Color c = list[i], nc = list[i + 1];
            var diff = new Tuple<float, float, float>((nc.r - c.r) / divideCount, (nc.g - c.g) / divideCount, (nc.b - c.b) / divideCount);
            for (int j = 0; j < divideCount; j++) 
            {
                res.Add(new Color(c.r + diff.Item1 * j, c.g + diff.Item2 * j, c.b + diff.Item3 * j));
            }
        }
        return res;
    }

    public List<Color> SetColorGradient(List<Color> list, List<int> divideList)
    {
        if (list.Count != divideList.Count+1) return null;
        var res = new List<Color>();
        for (int i = 0; i < list.Count - 1; i++)
        {
            Color c = list[i], nc = list[i + 1];
            var divideCount = divideList[i];
            var diff = new Tuple<float, float, float>((nc.r - c.r) / divideCount, (nc.g - c.g) / divideCount, (nc.b - c.b) / divideCount);
            for (int j = 0; j < divideCount; j++)
            {
                res.Add(new Color(c.r + diff.Item1 * j, c.g + diff.Item2 * j, c.b + diff.Item3 * j));
            }
        }
        return res;
    }
    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        
    }
}