SHJX_GM/SHJX.Service.Common/Utils/ChartHelper.cs

using LiveCharts.Wpf;
using LiveCharts;
using System.Windows.Media.Imaging;
using System.Windows.Media;
using System.Windows.Controls;
using System.Windows;
using System.Collections.Generic;
using System.IO;
using shjxCamera;

namespace SHJX.Service.Common.Utils
{
    public class ChartHelper
    {
        //private static readonly ILogger logger = LogFactory.Build("ChartHelper");

        private static LineSeries NewLineSeries(string title, Color color)
        {
            LineSeries series = new()
            {
                Title = title,
                Values = new ChartValues<int>(),
                Stroke = new SolidColorBrush(color),
                StrokeThickness = 1,
                Fill = Brushes.Transparent,
                PointGeometrySize = 0,
                LineSmoothness = 1,
                Foreground = new SolidColorBrush(color),
                Visibility = Visibility.Visible
            };
            return series;
        }

        public static void SaveGraph(List<ColorPoint> cps, string name)
        {
            SaveGraph(cps, name, name);
        }

        public static void SaveGraph(List<ColorPoint> cps, string name, string title)
        {
            //logger.LogInformation($"SaveGraph: {name}");
            LineSeries seriesH = NewLineSeries("A", Colors.White);
            LineSeries seriesR = NewLineSeries("R", Colors.Red);
            LineSeries seriesG = NewLineSeries("G", Colors.Green);
            LineSeries seriesB = NewLineSeries("B", Colors.Blue);
            LineSeries seriesP = NewLineSeries("P", Colors.Gray);
            for (int i = 0; i < cps.Count; i++)
            {
                seriesH.Values.Add(cps[i].Hue);
                seriesR.Values.Add(cps[i].R);
                seriesG.Values.Add(cps[i].G);
                seriesB.Values.Add(cps[i].B);
                seriesP.Values.Add(cps[i].Gray);
            }

            CartesianChart chart = new()
            {
                DisableAnimations = true,
                Name = "Chart",
                Width = 1024,
                Height = 768,
                Series = new SeriesCollection { 
                    seriesH,
                    seriesR,
                    seriesG,
                    seriesB,
                    seriesP
                },
                Background = new SolidColorBrush(Color.FromRgb(0x64, 0x52, 0xa4)),
                //LegendLocation = LegendLocation.Right,
            };

            chart.AxisX.Add(new LiveCharts.Wpf.Axis
            {
                IsMerged = true,
                Title = title,
                //IsEnabled = false,
                ShowLabels = false,
                FontSize = 24,
            });
            chart.AxisY.Add(new LiveCharts.Wpf.Axis
            {
                IsMerged= true,
                //Title = "color",
                MinValue = -5,
                MaxValue = 365,
                Separator = new LiveCharts.Wpf.Separator
                {
                    Step = 50,
                    StrokeDashArray = new DoubleCollection { 4, 8 },
                }
            });

            saveChart(chart, name);
        }

        public static void saveChart(CartesianChart chart, string name)
        {
            var viewbox = new Viewbox();
            viewbox.Child = chart;
            viewbox.Measure(chart.RenderSize);
            viewbox.Arrange(new Rect(new System.Windows.Point(0, 0), chart.RenderSize));
            chart.Update(false, true); //force chart redraw
            viewbox.UpdateLayout();

            //对象转换成位图
            RenderTargetBitmap bmp = new((int)chart.ActualWidth, (int)chart.ActualHeight, 96, 96, PixelFormats.Pbgra32);
            bmp.Render(chart);
            //对象的集合编码转成图像流
            BitmapEncoder encoder = new PngBitmapEncoder();
            encoder.Frames.Add(BitmapFrame.Create(bmp));
            //保存到文件中
            FileStream fs = new FileStream($"Data/{name}.png", FileMode.OpenOrCreate);
            encoder.Save(fs);
            fs.Close();
            fs.Dispose();
        }

    }
}