package com.example.yangenneng0.myapplication.viewUI;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.TypedValue;

import com.example.yangenneng0.myapplication.R;

class ArrowTextView extends android.support.v7.widget.AppCompatTextView {

    private float radius;
    private float arrowWidth;
    private float arrowHeight;
    private int color;

    public ArrowTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        ini(context, attrs);
    }


    private void ini(Context context, AttributeSet attrs) {
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.ArrowTextView);
        radius = typedArray.getDimension(R.styleable.ArrowTextView_radius, 0);
        arrowWidth = typedArray.getDimension(R.styleable.ArrowTextView_arrowWidth, 0);
        arrowHeight = typedArray.getDimension(R.styleable.ArrowTextView_arrowHeight, 0);
        color = typedArray.getColor(R.styleable.ArrowTextView_bg, Color.RED);
    }

    public ArrowTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        ini(context, attrs);
    }

    public ArrowTextView(Context context) {
        super(context);
    }

    /**
     * @param arrowWidth 三角形箭头的宽度.......
     */
    public void setArrowWidth(float arrowWidth) {
        this.arrowWidth = arrowWidth;
        invalidate();
    }

    /**
     * @param arrowHeight 三角形箭头的高度......
     */
    public void setArrowHeight(float arrowHeight) {
        this.arrowHeight = arrowHeight;
        invalidate();
    }

    /**
     * @param radius 矩形四角圆角的半径..........
     */
    public void setRadius(float radius) {
        this.radius = radius;
        invalidate();
    }

    /**
     * @param color 箭头矩形的背景色.........
     */
    public void setBgColor(int color) {
        this.color = color;
        invalidate();

    }


    @Override
    protected void onDraw(Canvas canvas) {
        Paint paint = new Paint();
        paint.setColor(color == 0 ? Color.RED : color);
        paint.setAntiAlias(true);
        if (radius == 0) {
            radius = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PX, 5, getResources().getDisplayMetrics());
        }
        if (arrowWidth == 0) {
            arrowWidth = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PX, 20, getResources().getDisplayMetrics());
        }
        if (arrowHeight == 0) {
            arrowHeight = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PX, 15, getResources().getDisplayMetrics());
        }
        //带圆角的矩形(下边减去三角形的高度...........)
        int width = getWidth();
        Float height = getHeight() - arrowHeight;
        canvas.drawRoundRect(new RectF(0, 0, getWidth(), height), radius, radius, paint);

        //画三角形

        Path path = new Path();

        path.setFillType(Path.FillType.EVEN_ODD);
        float xMiddle = width / 2;
        float xLeft = xMiddle - arrowWidth / 2;
        float xRight = xMiddle + arrowWidth / 2;
        float yBottom = height + arrowHeight;
        path.moveTo(xMiddle, yBottom);
        path.lineTo(xLeft, height-1);
        path.lineTo(xRight, height-1);
        path.lineTo(xMiddle, yBottom);
        path.close();
        canvas.drawPath(path, paint);
        // canvas.restore();
        // canvas.translate(left, 0);
        super.onDraw(canvas);

    }
}