using Android;
using Android.App;
using Android.OS;
using Android.Views;
using Android.Content;          // vanwege Context
using Android.Support.V7.App;
using Android.Runtime;
using Android.Widget;
using Android.Graphics;         // vanwege Color
using Android.Hardware;

using System;
using System.Collections.Generic;

namespace App4
{
    [Activity(Label = "Running", MainLauncher = true)]
    public class RunningApp : Activity

    {
        Button center;
        Button start;
        Button clear;

        LinearLayout buttonlayout;
        LinearLayout screenlayout;
        Mapview Map;

        public void Buttons()
        {
            this.center = new Button(this);
            this.start = new Button(this);
            this.clear = new Button(this);
            this.center.Text = "Center";
            this.start.Text = "Start";
            this.clear.Text = "Clear";
            this.center.TextSize = 10;
            this.start.TextSize = 10;
            this.clear.TextSize = 10;
            this.center.Click += this.centerklick;
            this.start.Click += this.startklick;
            this.clear.Click += this.clearklick;


        }
        public void centerklick(object o, EventArgs ea)
        {
            Map.CenterMap();

        }
        public void startklick(object o, EventArgs ea)
        { }
        public void clearklick(object o, EventArgs ea)
        { }
        protected override void OnCreate(Bundle b)
        {
            base.OnCreate(b);
            Buttons();

            Map = new Mapview(this);
            //Linerlayout
            buttonlayout = new LinearLayout(this);
            screenlayout = new LinearLayout(this);


            buttonlayout.Orientation = Orientation.Horizontal;
            buttonlayout.AddView(center);
            buttonlayout.AddView(start);
            buttonlayout.AddView(clear);


            screenlayout.Orientation = Orientation.Vertical;

            screenlayout.AddView(buttonlayout);
            screenlayout.AddView(Map);
            this.SetContentView(screenlayout);
        }
    }
    public class Mapview : View, GestureDetector.IOnGestureListener, ScaleGestureDetector.IOnScaleGestureListener
    {
        Bitmap PG;
        float scale;
        float d;
        float midx;
        float midy;
        float max;

        PointF centrum = new PointF(139000, 455500);
        Paint verf = new Paint();
        GestureDetector detector;
        ScaleGestureDetector Scaledetector;
        public Mapview(Context c) : base(c)
        {

            this.SetBackgroundColor(Color.Blue);
            detector = new GestureDetector(c, this);
            Scaledetector = new ScaleGestureDetector(c, this);
            BitmapFactory.Options opt = new BitmapFactory.Options();
            opt.InScaled = false;
            PG = BitmapFactory.DecodeResource(c.Resources, Resource.Drawable.Utrecht, opt);


            this.Touch += touched;
        }
        List<PointF> punten = new List<PointF>();
        public void touched(object o,TouchEventArgs tea)
        {

            detector.OnTouchEvent(tea.Event);
            //Scaledetector.OnTouchEvent(tea.Event);
        }
        public void CenterMap()
        {
            /*mat.PostTranslate(-(139000 - 136000) * 0.4f, -(455500 - 458000) *0.4f);
            mat.PostScale(this.scale, this.scale);
            mat.PostTranslate(this.Width / 2, this.Height / 2);*/

        }

        bool j = true;
        protected override void OnDraw(Canvas canvas)
        {
            Matrix mat = new Matrix();

            if (j)
            {
                scale = Math.Max(max, Math.Min(scale, 6f));

                if (scale == 0)
                    scale = Math.Max(((float)this.Width) / this.PG.Width,
                                    ((float)this.Height) / this.PG.Height);
                j = false;
            }

            base.OnDraw(canvas);
                max = (float)((decimal)this.Height / (decimal)PG.Height);

                midx = (centrum.X - 136000) * 0.4f;
                midy = -(centrum.Y - 458000) * 0.4f;

                mat.PostTranslate(-midx, -midy);
                mat.PostScale(this.scale, this.scale);
                mat.PostTranslate(this.Width / 2, this.Height / 2);


            canvas.DrawBitmap(this.PG, mat, verf);

        }

        public bool OnDown(MotionEvent e)
        {
            /*float dx = e.Event.GetX();
            float dy =
            float ax = (dx / this.scale) / 0.2f;  // Distance to the centre in metres
            float ay = (dy / this.scale) / 0.2f;

            this.centrum = new PointF(centrum.X + ax, centrum.Y - ay);

            */
            return true;
        }

        public bool OnFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
        {
            return true;
        }

        public void OnLongPress(MotionEvent e)
        {
        }

        public bool OnScroll(MotionEvent e1, MotionEvent e2, float dx, float dy)
        {
            float ax = 0;
            float ay = 0;

            ax = (dx / this.scale) / 0.2f;  // Distance to the centre in metres
            ay = (dy / this.scale) / 0.2f;

            this.centrum = new PointF(centrum.X + ax, centrum.Y - ay);
            this.Invalidate();
            return (true);
        }

        public void OnShowPress(MotionEvent e)
        {
        }

        public bool OnSingleTapUp(MotionEvent e)
        {
            return true;
        }

        public bool OnScale(ScaleGestureDetector detector)
        {
            this.scale *= detector.ScaleFactor;
            this.Invalidate();
            return true;
        }

        public bool OnScaleBegin(ScaleGestureDetector detector)
        {
            return true;
        }

        public void OnScaleEnd(ScaleGestureDetector detector)
        {
        }
    }
}