Canvas 1.0.1-RC

Suggested Alternatives

CrossCanvas.Views.WPF

Additional Details

WPF specific implementation was retired in favor of cross-platform version called CrossCanvas

This is a prerelease version of Canvas.
The owner has unlisted this package. This could mean that the package is deprecated, has security vulnerabilities or shouldn't be used anymore.
dotnet add package Canvas --version 1.0.1-RC
NuGet\Install-Package Canvas -Version 1.0.1-RC
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Canvas" Version="1.0.1-RC" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Canvas --version 1.0.1-RC
#r "nuget: Canvas, 1.0.1-RC"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install Canvas as a Cake Addin
#addin nuget:?package=Canvas&version=1.0.1-RC&prerelease

// Install Canvas as a Cake Tool
#tool nuget:?package=Canvas&version=1.0.1-RC&prerelease

Canvas and Open GL Stock and Financial Charts

Generic real-time charts for WPF apps.

The main purpose of this app is to be used as a charting tool for real-time financial applications, e.g. backtesters for trading strategies. Here is the most comprehensive guide dedicated to charting in .NET that I have seen so far. Nevertheless, trying various options from that guide I wasn't able to find anything flexible enough for my needs, so created my own.

Drawing Methods

Currently available controls.

  • CanvasControl - extended WPF Canvas control exposing DrawingContext used with Shapes and Geometries
  • CanvasImageControl - a wrapper around SkiaSharp and Open GL

In order to add a different type of panel, e.g. GDI+ or Direct2D, you need to implement ICanvasControl interface.

Chart Types

At the moment, there are four built-in chart types.

  • Line - line
  • Bar - polygon
  • Area - polygon
  • Candle - OHLC box, a mix of a line and a rectangle polygon

If there is a need to create a new chart type, then you need to implement IShape interface.

Pan and Zoom

The chart is completely data-centric, thus in order to scale the chart you need to change the data source. By default, the chart displays last 100 data points, as defined in IndexCount property.

MinIndex = Items.Count - IndexCount
MaxIndex = Items.Count

To pan the chart to the left, subtract arbitrary value from both MinIndex and MaxIndex.

MinIndex -= 1
MaxIndex -= 1

To pan the chart to the left, do the opposite.

MinIndex += 1
MaxIndex += 1

To zoom in, increase MinIndex and decrease MaxIndex to decrease number of visible points.

MinIndex += 1
MaxIndex -= 1

To zoom out, do the opposite.

MinIndex -= 1
MaxIndex += 1

Data source sample

To simplify sycnhronization of multiple charts, data source has format of a list where each entry point has a time stamp and a set of Areas and Series that will be rendered in the relevant viewport.

[
  DateTime
  {
    Area A
    {
      Line Series => double,
      Candle Series => OHLC
    },
    Area B 
    {
      Line Series => double,
      Line Series => double
    },
    Area C 
    {
      Bar Series => double
    }
  }, 
  DateTime,
  DateTime,
  DateTime
]

  • Area is a viewport, an actual chart, each viewport can show several types of series, e.g. a mix of candles and lines.
  • Series is a single chart type to be displayed in the viewport, e.g. lines.
  • Model is a data point of dynamic type, can accept different type of inputs, e.g. double or OHLC box.

At this moment, Painter supports only horizontal orientation, so the axis X is used as an index scale that picks data points from the source list and axis Y is a value scale that represents the actual value of each data point.

Preview

alternate text is missing from this package README image

Product Compatible and additional computed target framework versions.
.NET net5.0-windows7.0 is compatible.  net6.0-windows was computed.  net7.0-windows was computed.  net8.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

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