QuestPDF/Source/QuestPDF.DocumentationExamples/ChartExamples.cs

using QuestPDF.Fluent;
using QuestPDF.Helpers;
using QuestPDF.Infrastructure;
using ScottPlot;
using Colors = QuestPDF.Helpers.Colors;
using ImageFormat = QuestPDF.Infrastructure.ImageFormat;

namespace QuestPDF.DocumentationExamples;

public class ChartExamples
{
    [Test]
    public void PieChartExample()
    {
        Settings.UseEnvironmentFonts = true;

        Document
            .Create(document =>
            {
                document.Page(page =>
                {
                    page.MinSize(new PageSize(350, 0));
                    page.MaxSize(new PageSize(350, 1000));
                    page.DefaultTextStyle(x => x.FontSize(20));
                    page.Margin(25);
                    
                    page.Content()
                        .Column(column =>
                        {
                            column.Spacing(10);
                            
                            column.Item().Text("US energy consumption [%]\nby source in 2021").AlignCenter().Bold();
                            
                            column.Item()
                                .AspectRatio(1)
                                .Svg(size =>
                                {
                                    using ScottPlot.Plot plot = new();
                                    
                                    var slices = new PieSlice[]
                                    {
                                        new() { Value = 8, FillColor = new ScottPlot.Color(Colors.Yellow.Medium.Hex), Label = "Nuclear" },
                                        new() { Value = 12, FillColor = new ScottPlot.Color(Colors.Green.Medium.Hex), Label = "Renewable" },
                                        new() { Value = 32, FillColor = new ScottPlot.Color(Colors.Blue.Medium.Hex), Label = "Natural gas" },
                                        new() { Value = 11, FillColor = new ScottPlot.Color(Colors.Grey.Medium.Hex), Label = "Coal" },
                                        new() { Value = 36, FillColor = new ScottPlot.Color(Colors.Brown.Medium.Hex), Label = "Petroleum" }
                                    };

                                    var pie = plot.Add.Pie(slices);
                                    pie.DonutFraction = 0.5;
                                    pie.SliceLabelDistance = 1.5;
                                    pie.LineColor = ScottPlot.Colors.White;
                                    pie.LineWidth = 3;
                                    
                                    foreach (var pieSlice in pie.Slices)
                                    {
                                        pieSlice.LabelStyle.FontName = "Lato";
                                        pieSlice.LabelStyle.FontSize = 16;
                                    }

                                    plot.Axes.Frameless();
                                    plot.HideGrid();

                                    return plot.GetSvgXml((int)size.Width, (int)size.Height);
                                });
                        });
                });
            })
            .GenerateImages(x => "chart-pie.webp", new ImageGenerationSettings() { ImageFormat = ImageFormat.Webp, ImageCompressionQuality = ImageCompressionQuality.Best, RasterDpi = 144 });
    }
    
    [Test]
    public void BarExample()
    {
        Settings.UseEnvironmentFonts = true;

        Document
            .Create(document =>
            {
                document.Page(page =>
                {
                    page.MinSize(new PageSize(650, 0));
                    page.MaxSize(new PageSize(650, 1000));
                    page.DefaultTextStyle(x => x.FontSize(20));
                    page.Margin(25);
                    
                    page.Content()
                        .Column(column =>
                        {
                            column.Spacing(10);
                            
                            column.Item().Text("Popularity of C# versions in 2023").AlignCenter().Bold();
                            
                            column.Item()
                                .AspectRatio(2)
                                .Svg(size =>
                                {
                                    ScottPlot.Plot plot = new();
                                    
                                    var bars = new Bar[]
                                    {
                                        new() { Position = 1, Value = 2 },
                                        new() { Position = 2, Value = 3 },
                                        new() { Position = 3, Value = 8 },
                                        new() { Position = 4, Value = 13 },
                                        new() { Position = 5, Value = 17 },
                                        new() { Position = 6, Value = 17 },
                                        new() { Position = 7, Value = 32 },
                                        new() { Position = 8, Value = 42 }
                                    };
                                    
                                    foreach (var bar in bars)
                                    {
                                        bar.FillColor = new ScottPlot.Color(Colors.Grey.Medium.Hex);
                                        bar.LineWidth = 0;
                                        bar.Size = 0.5;
                                    }

                                    plot.Add.Bars(bars);
                                    
                                    Tick[] ticks = [
                                        new(1, "Other"),
                                        new(2, "C# 5"),
                                        new(3, "C# 6"),
                                        new(4, "C# 7"),
                                        new(5, "C# 8"),
                                        new(6, "C# 9"),
                                        new(7, "C# 10"),
                                        new(8, "C# 11")
                                    ];

                                    plot.Axes.Bottom.TickGenerator = new ScottPlot.TickGenerators.NumericManual(ticks);
                                    plot.Axes.Bottom.MajorTickStyle.Length = 0;
                                    plot.Axes.Bottom.TickLabelStyle.FontName = "Lato";
                                    plot.Axes.Bottom.TickLabelStyle.FontSize = 16;
                                    plot.Axes.Bottom.TickLabelStyle.OffsetY = 8;
                                    plot.Grid.XAxisStyle.IsVisible = false;
                                    
                                    plot.Axes.Margins(bottom: 0, top: 0.25f);

                                    return plot.GetSvgXml((int)size.Width, (int)size.Height);
                                });
                        });
                });
            })
            .GenerateImages(x => "chart-bars.webp", new ImageGenerationSettings() { ImageFormat = ImageFormat.Webp, ImageCompressionQuality = ImageCompressionQuality.Best, RasterDpi = 144 });
    }
}