package com.example.studente.esercizio3;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PointF;
import android.graphics.RectF;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;

import java.util.List;

public class PieChartView extends View {

    private PointF center = new PointF();
    private RectF enclosing = new RectF();
    private List<Integer> segmentColor;
    private List<Float> percent;
    private int radius= 100;
    private int backgroundColor = Color.WHITE;
    private int strokeColor;


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

    public PieChartView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public PieChartView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onDraw(Canvas canvas){
        Paint paint = new Paint();
        paint.setColor(backgroundColor);
        canvas.drawRect(0,0,canvas.getHeight(),canvas.getWidth(),paint);

        paint.setFlags(Paint.ANTI_ALIAS_FLAG);

        center.x = canvas.getWidth()/2;
        center.y = canvas.getHeight()/2;
        enclosing.top = center.y - radius;
        enclosing.bottom = center.y + radius;
        enclosing.left = center.x - radius;
        enclosing.right = center.x + radius;

        float alpha=-90.0f;
        float p2a=360.0f/100.0f;

        float p;
        Integer c;

        for(int i = 0; i < percent.size();i++){
            p = percent.get(i); // % da rappresentare
            c = segmentColor.get(i); // colore da usare
            paint.setColor(c);
            paint.setStyle(Paint.Style.FILL)

            canvas.drawArc(enclosing,alpha,p*p2a,true,paint);
            alpha += p*p2a;
        }

        alpha=-90.0f;
        for(int i = 0; i < percent.size();i++)
        {
            p = percent.get(i);

            paint.setColor(strokeColor);
            paint.setStyle(paint.Style.STROKE);

            canvas.drawArc(enclosing,alpha,p*p2a,true,paint);
            alpha += p*p2a;
        }
    }


}