Canvas Deprecated?

[blogcraft]

Describe the bug
I used to draw svg using Canvas. Now its deprecated and documentation still lists canvas as usable.

If there is a new way to work here, I would like to get pointed to documentation please.

To Reproduce

    public void Compose(IContainer container)
    {
        container.Column(col =>
        {
            col.Item()
                .Height(20)
                .Row(row =>
                {
                    row.ConstantItem(9)
                        .Canvas(
                            (canvas, _) =>
                            {
                                using var paint = new SKPaint
                                {
                                    Color = SKColor.Parse("#3A5EA8"),
                                    StrokeWidth = 1,
                                    IsStroke = false
                                };

                                canvas.DrawRect(0, 0, 9, 20, paint);
                            }
                        );
                    row.RelativeItem().PaddingLeft(4).AlignMiddle().Text(Text);
                });
        });
    }

Also I work with Chart library OxyPlot to generate SKSvg and then canvas.DrawPicture and also wont work.

public void Compose(IContainer container)
{
    container.Column(column =>
    {
        column
            .Item()
            .Canvas(
                (canvas, size) =>
                {
                    var model = CreatePieChart(Titulo, Data);

                    SvgExporter exporter = new() { Height = size.Height, Width = size.Width };
                    var pieChartSvg = new SKSvg();
                    MemoryStream stream = new();
                    exporter.Export(model, stream);
                    MemoryStream memoryStream = new(stream.ToArray());

                    pieChartSvg.Load(memoryStream);
                    canvas.DrawPicture(pieChartSvg.Picture);
                }
            );
    });
}

private static PlotModel CreatePieChart(string titulo, PieSlice[] data)
{
    var model = new PlotModel
    {
        Title = titulo,
        DefaultFont = "Lato",
        TitleFont = "Lato",
        SubtitleFont = "Lato",
        DefaultFontSize = 8,
        TitleFontSize = 8,
        SubtitleFontSize = 8,
        TextColor = OxyColor.Parse("#231f20"),
    };

    PieSeries? ps =
        new()
        {
            StrokeThickness = .25,
            InsideLabelPosition = .25,
            StartAngle = -90,
            Font = "Lato",
            FontSize = 8,
            TextColor = OxyColor.Parse("#231f20"),
            TickRadialLength = 0,
            TickHorizontalLength = 0,
            InsideLabelFormat = "",
            OutsideLabelFormat = "{2:#0.00} %",
            TickLabelDistance = 10,
        };

    foreach (var item in data)
    {
        ps.Slices.Add(item);
    }
    model.Series.Add(ps);
    return model;
}

Expected behavior
Draw a square or a chart.

Screenshots

Environment
Windows and Linux

Additional context
Need to know how the new way works :/

[MarcinZiabek]

Thank you for sharing your experience 😄

As the QuestPDF 2024.3.0 removes SkiaSharp as its dependency, the integration process looks slightly different. I have just updated the documentation that:

1. provides two methods that should be copied to the codebase to enable the integration (https://www.questpdf.com/concepts/skia-sharp-integration.html)
2. show how to use those methods to integrate SkiaSharp-based libraries with QuestPDF (https://www.questpdf.com/examples/implementing-charts.html)

If your library can directly output SVG image, you can also use the new built-in native SVG support: https://www.questpdf.com/api-reference/image.html#svg-support

I hope it will helps. Please feel free to share your feedback

[blogcraft]

Thank a lot! It works perfectly!

I noticed 2 issues, but i created a separate Issue for them:

#863