using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace RealTimeGraphEx.FastGraphs
{
    /// <summary>
    /// Represents a real-time graph with a single scrollable wave form.
    /// </summary>
    public class RealTimeGraphExWaveScroll : RealTimeGraphExLineScroll
    {
        #region Constructors

        public RealTimeGraphExWaveScroll()
            : base()
        {

        }

        #endregion

        #region Override Methods

        /// <summary>
        /// Set the cross thread fields.
        /// </summary>
        protected override void OnSetCrossThreadFields()
        {
            base.OnSetCrossThreadFields();

            this.Dispatcher.Invoke(() =>
            {

                _minimum = _maximum * -1;

            }, System.Windows.Threading.DispatcherPriority.Send);
        }

        /// <summary>
        /// Draw the actual polygon on the image.
        /// </summary>
        /// <param name="bmp"></param>
        protected override void OnDrawVisuals(WriteableBitmap bmp)
        {
            Color stroke = _graphController.dataSeries.GetStrokeColor() != null ? _graphController.dataSeries.GetStrokeColor().Value : _stroke;
            Color fill = _graphController.dataSeries.GetFillColor() != null ? _graphController.dataSeries.GetFillColor().Value : _fill;

            double scale = GetPolygonScaleFactor();

            if (_fillGraph) //Fill Graph
            {
                bmp.FillPolygon(graphPolygon.ToPolygonPointsWaveFill(_offSetX, _offSetY, _width, _height, scale, ConvertYToImageYFliped), fill);
            }

            DrawPolyline(bmp, graphPolygon.ToPolygonPoints(_offSetX, _offSetY, scale, ConvertYToImageYFliped), stroke);
            DrawPolyline(bmp, graphPolygon.ToPolygonPointsReflection(_offSetX, _offSetY, _height, scale, ConvertYToImageYFliped), stroke);
        }

        #endregion
    }
}