代码语言：javascript复制
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Sprites;
using UnityEngine.EventSystems;
namespace UnityEngine.UIExtend
{
[AddComponentMenu("UI/UISlider", 15)]
public class UISlider : Graphic, IDragHandler, IEndDragHandler
{
public Slider.Direction m_Direction;
public System.Action<float> m_OnValueChanged;
[SerializeField]
Sprite m_BackGround;
[SerializeField]
Sprite m_Fill;
public RectTransform m_Handle;
[Range(0, 1)]
public float value;
public Color fg_Color;
private float curValue;
public override void SetNativeSize()
{
base.SetNativeSize();
}
public override Texture mainTexture
{
get
{
if (m_BackGround == null)
{
if (material != null && material.mainTexture != null)
{
return material.mainTexture;
}
return s_WhiteTexture;
}
return m_BackGround.texture;
}
}
protected UISlider()
{
useLegacyMeshGeneration = false;
raycastTarget = false;
curValue = value;
}
protected override void OnPopulateMesh(VertexHelper vh)
{
base.OnPopulateMesh(vh);
vh.Clear();
Texture tex = mainTexture;
var r = GetPixelAdjustedRect();
Vector4 v = new Vector4(r.x, r.y, r.width r.x, r.height r.y);
float horizontalNormal = r.width * value;
float verticalNormal = r.height * value;
if (curValue != value)
{
m_OnValueChanged?.Invoke(value);
curValue = value;
}
if (m_Direction == Slider.Direction.LeftToRight || m_Direction == Slider.Direction.RightToLeft)
{
if (m_Direction == Slider.Direction.LeftToRight)
{
if (m_BackGround != null)
{
var bgUV = DataUtility.GetInnerUV(m_BackGround);
var color32 = color;
float fill = (bgUV.z - bgUV.x) * value;
vh.AddVert(new Vector3(v.x horizontalNormal, v.y), color32, new Vector2(bgUV.x fill, bgUV.y)); //0
vh.AddVert(new Vector3(v.x horizontalNormal, v.w), color32, new Vector2(bgUV.x fill, bgUV.w)); //1
vh.AddVert(new Vector3(v.z, v.w), color32, new Vector2(bgUV.z, bgUV.w)); //2
vh.AddVert(new Vector3(v.z, v.y), color32, new Vector2(bgUV.z, bgUV.y)); //3
vh.AddTriangle(0, 1, 2);
vh.AddTriangle(2, 3, 0);
}
if (m_Fill != null)
{
var fileSpUV = DataUtility.GetInnerUV(m_Fill);
var colort = fg_Color;
float fill = (fileSpUV.z - fileSpUV.x) * value;
vh.AddVert(new Vector3(v.x, v.y), colort, new Vector2(fileSpUV.x, fileSpUV.y)); //4
vh.AddVert(new Vector3(v.x, v.w), colort, new Vector2(fileSpUV.x, fileSpUV.w)); //5
vh.AddVert(new Vector3(v.x horizontalNormal, v.w), colort, new Vector2(fileSpUV.x fill, fileSpUV.w)); //6
vh.AddVert(new Vector3(v.x horizontalNormal, v.y), colort, new Vector2(fileSpUV.x fill, fileSpUV.y)); //7
vh.AddTriangle(4, 5, 6);
vh.AddTriangle(6, 7, 4);
}
if (m_Handle != null)
{
float diffValue=r.width*(0.5f-m_Handle.anchorMin.x) - m_Handle.rect.width*(0.5f-m_Handle.anchorMin.x);
m_Handle.anchoredPosition = new Vector2(v.x horizontalNormal diffValue, m_Handle.anchoredPosition.y);
}
}
if (m_Direction == Slider.Direction.RightToLeft)
{
if (m_BackGround != null)
{
var spriteUV = DataUtility.GetInnerUV(m_BackGround);
var color32 = color;
float fill = (spriteUV.z - spriteUV.x) * value;
vh.AddVert(new Vector3(v.x, v.y), color32, new Vector2(spriteUV.x, spriteUV.y));
vh.AddVert(new Vector3(v.x, v.w), color32, new Vector2(spriteUV.x, spriteUV.w));
vh.AddVert(new Vector3(v.z - horizontalNormal, v.w), color32, new Vector2(spriteUV.z - fill, spriteUV.w));
vh.AddVert(new Vector3(v.z - horizontalNormal, v.y), color32, new Vector2(spriteUV.z - fill, spriteUV.y));
vh.AddTriangle(4, 5, 6);
vh.AddTriangle(6, 7, 4);
}
if (m_Fill != null)
{
var fileSpUV = DataUtility.GetInnerUV(m_Fill);
var colort = fg_Color;
float fill = (fileSpUV.z - fileSpUV.x) * value;
float vertFill = r.width * value;
vh.AddVert(new Vector3(v.z - horizontalNormal, v.y), colort, new Vector2(fileSpUV.z - fill, fileSpUV.y));
vh.AddVert(new Vector3(v.z - horizontalNormal, v.w), colort, new Vector2(fileSpUV.z - fill, fileSpUV.w));
vh.AddVert(new Vector3(v.z, v.w), colort, new Vector2(fileSpUV.z, fileSpUV.w));
vh.AddVert(new Vector3(v.z, v.y), colort, new Vector2(fileSpUV.z, fileSpUV.y));
vh.AddTriangle(0, 1, 2);
vh.AddTriangle(2, 3, 0);
}
if (m_Handle != null)
{
float diffValue=r.width*(0.5f-m_Handle.anchorMin.x) - m_Handle.rect.width*(0.5f-m_Handle.anchorMin.x);
m_Handle.anchoredPosition = new Vector2(v.z - horizontalNormal diffValue, m_Handle.anchoredPosition.y);
}
}
}
else
{
if (m_Direction == Slider.Direction.BottomToTop)
{
if (m_BackGround != null)
{
var spriteUV = DataUtility.GetInnerUV(m_BackGround);
var color32 = color;
float fill = (spriteUV.w - spriteUV.y) * value;
vh.AddVert(new Vector3(v.x, v.w), color32, new Vector2(spriteUV.x, spriteUV.w)); //0
vh.AddVert(new Vector3(v.z, v.w), color32, new Vector2(spriteUV.z, spriteUV.w)); //1
vh.AddVert(new Vector3(v.z, v.y verticalNormal), color32, new Vector2(spriteUV.z, spriteUV.y fill)); //2
vh.AddVert(new Vector3(v.x, v.y verticalNormal), color32, new Vector2(spriteUV.x, spriteUV.y fill)); //3
vh.AddTriangle(0, 1, 2);
vh.AddTriangle(2, 3, 0);
}
if (m_Fill != null)
{
var fileSpUV = DataUtility.GetInnerUV(m_Fill);
var colort = fg_Color;
float fill = (fileSpUV.w - fileSpUV.y) * value;
vh.AddVert(new Vector3(v.x, v.y verticalNormal), colort, new Vector2(fileSpUV.x, fileSpUV.y fill));
vh.AddVert(new Vector3(v.z, v.y verticalNormal), colort, new Vector2(fileSpUV.z, fileSpUV.y fill));
vh.AddVert(new Vector3(v.z, v.y), colort, new Vector2(fileSpUV.z, fileSpUV.y));
vh.AddVert(new Vector3(v.x, v.y), colort, new Vector2(fileSpUV.x, fileSpUV.y));
vh.AddTriangle(4, 5, 6);
vh.AddTriangle(6, 7, 4);
}
if (m_Handle != null)
{
float diffValue=r.height*(0.5f-m_Handle.anchorMin.y) - m_Handle.rect.height*(0.5f-m_Handle.anchorMin.y);
m_Handle.anchoredPosition = new Vector2(m_Handle.anchoredPosition.x, v.y verticalNormal diffValue);
}
}
if (m_Direction == Slider.Direction.TopToBottom)
{
if (m_Fill != null)
{
var spriteUV = DataUtility.GetInnerUV(m_Fill);
var color32 = color;
float fill = (spriteUV.w - spriteUV.y) * value;
vh.AddVert(new Vector3(v.x, v.w), color32, new Vector2(spriteUV.x, spriteUV.w)); //0
vh.AddVert(new Vector3(v.z, v.w), color32, new Vector2(spriteUV.z, spriteUV.w)); //1
vh.AddVert(new Vector3(v.z, v.w - verticalNormal), color32, new Vector2(spriteUV.z, spriteUV.w - fill)); //2
vh.AddVert(new Vector3(v.x, v.w - verticalNormal), color32, new Vector2(spriteUV.x, spriteUV.w - fill)); //3
vh.AddTriangle(0, 1, 2);
vh.AddTriangle(2, 3, 0);
}
if (m_BackGround != null)
{
var fileSpUV = DataUtility.GetInnerUV(m_BackGround);
var colort = fg_Color;
float fill = (fileSpUV.w - fileSpUV.y) * value;
vh.AddVert(new Vector3(v.x, v.w - verticalNormal), colort, new Vector2(fileSpUV.x, fileSpUV.w - fill));
vh.AddVert(new Vector3(v.z, v.w - verticalNormal), colort, new Vector2(fileSpUV.z, fileSpUV.w - fill));
vh.AddVert(new Vector3(v.z, v.y), colort, new Vector2(fileSpUV.z, fileSpUV.y));
vh.AddVert(new Vector3(v.x, v.y), colort, new Vector2(fileSpUV.x, fileSpUV.y));
vh.AddTriangle(4, 5, 6);
vh.AddTriangle(6, 7, 4);
}
if (m_Handle != null)
{
float diffValue=r.height*(0.5f-m_Handle.anchorMin.y) - m_Handle.rect.height*(0.5f-m_Handle.anchorMin.y);
m_Handle.anchoredPosition = new Vector2(m_Handle.anchoredPosition.x, v.w - verticalNormal diffValue);
}
}
}
}
public void OnDrag(PointerEventData eventData)
{
if (m_Handle == null) return;
Vector2 localCursor;
if (!RectTransformUtility.ScreenPointToLocalPointInRectangle(this.rectTransform, eventData.position, eventData.pressEventCamera, out localCursor))
return;
var r = GetPixelAdjustedRect();
if (m_Direction == Slider.Direction.LeftToRight)
value = Mathf.Clamp01((localCursor.x - r.x) / r.width);
else if (m_Direction == Slider.Direction.RightToLeft)
value = 1 - Mathf.Clamp01((localCursor.x - r.x) / r.width);
else if (m_Direction == Slider.Direction.TopToBottom)
value = 1 - Mathf.Clamp01((localCursor.y - r.y) / r.height);
else if (m_Direction == Slider.Direction.BottomToTop)
value = Mathf.Clamp01((localCursor.y - r.y) / r.height);
SetVerticesDirty();
}
public void OnEndDrag(PointerEventData eventData)
{
if (m_Handle == null) return;
Vector2 localCursor;
if (!RectTransformUtility.ScreenPointToLocalPointInRectangle(this.rectTransform, eventData.position, eventData.pressEventCamera, out localCursor))
return;
var r = GetPixelAdjustedRect();
if (m_Direction == Slider.Direction.LeftToRight)
value = Mathf.Clamp01((localCursor.x - r.x) / r.width);
else if (m_Direction == Slider.Direction.RightToLeft)
value = 1 - Mathf.Clamp01((localCursor.x - r.x) / r.width);
else if (m_Direction == Slider.Direction.TopToBottom)
value = 1 - Mathf.Clamp01((localCursor.y - r.y) / r.height);
else if (m_Direction == Slider.Direction.BottomToTop)
value = Mathf.Clamp01((localCursor.y - r.y) / r.height);
SetVerticesDirty();
}
}
}
