package com.xscm.moduleutil.widget;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Shader;
import android.util.AttributeSet;
import android.widget.TextView;

/**
 * ProjectName: CustomViewApp
 * Package: com.yde.libview
 * Description: 扫光TextView
 * Author: 姚闻达
 * CreateDate: 2021/3/11
 * UpdateUser: 更新者
 * UpdateDate: 2021/3/11 10:58
 * UpdateRemark: 更新说明
 * Version: 1.0
 */
public class ScanTextView extends TextView {

    //渲染器
    private LinearGradient mLinearGradient;
    //渲染范围
    private Matrix mGradientMatrix;
    //渲染的起始位置
    private int mViewWidth = 0;
    //渲染的终止距离
    private int mTranslate = 0;
    //是否启动动画
    private boolean mAnimating = true;
    //多少毫秒刷新一次
    private int speed = 50;
    private int lightColor;
    private Paint mPaint;

    public ScanTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mPaint = getPaint();
        mGradientMatrix = new Matrix();
    }

    @SuppressLint("DrawAllocation")
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        mViewWidth = getMeasuredWidth();
//        mLinearGradient = new LinearGradient(0, 0, mViewWidth, 0, new int[] { Color.GRAY, Color.WHITE, Color.GRAY }, null, Shader.TileMode.CLAMP);
        if (mAnimating) {
            mLinearGradient = new LinearGradient(0, 0, mViewWidth, 0, new int[]{getCurrentTextColor(), lightColor, getCurrentTextColor()}, null, Shader.TileMode.CLAMP);
        } else {
            mLinearGradient = new LinearGradient(0, 0, mViewWidth, 0, new int[]{getCurrentTextColor(), getCurrentTextColor(), getCurrentTextColor()}, null, Shader.TileMode.CLAMP);
        }
        mPaint.setShader(mLinearGradient);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (mAnimating && mGradientMatrix != null) {
            mTranslate += mViewWidth / 10;//每次移动屏幕的1/10宽
            if (mTranslate > 2 * mViewWidth) {
                mTranslate = -mViewWidth;
            }
            mGradientMatrix.setTranslate(mTranslate, 0);
            mLinearGradient.setLocalMatrix(mGradientMatrix);//在指定矩阵上渲染
            postInvalidateDelayed(speed);
        }
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
    }

    public void setSpeed(int speed) {
        this.speed = speed;
    }

    public void setLightColor(int lightColor) {
        this.lightColor = lightColor;
    }

    public void setScan(boolean canScan) {
        this.mAnimating = canScan;
    }
}