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Programming language: JavaScript
License: GNU General Public License v3.0 or later
Tags: Mathematics    

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README

Microsoft Automatic Graph Layout

MSAGL is a .NET library and tool for graph layout and viewing.

MSAGL was developed in Microsoft by Lev Nachmanson, Sergey Pupyrev, Tim Dwyer, Ted Hart, and Roman Prutkin.

Getting Started

The simplest way to start with MSAGL in C# is to open GraphLayout.sln in Visual Studio and browse the Samples folder.

MSAGL Modules

The Core Layout engine (AutomaticGraphLayout.dll) - NuGet package This .NET asssembly contains the core layout functionality. Use this library if you just want MSAGL to perform the layout only and afterwards you will use a separate tool to perform the rendering and visalization.

The Drawing module (AutomaticGraphLayout.Drawing.dll) - NuGet package The Definitions of different drawing attributes like colors, line styles, etc. It also contains definitions of a node class, an edge class, and a graph class. By using these classes a user can create a graph object and use it later for layout, and rendering.

A WPF control (Microsoft.Msagl.WpfGraphControl.dll) - NuGet package The viewer control lets you visualize graphs and has and some other rendering functionality. Key features: (1) Pan and Zoom (2) Navigate Forward and Backward (3) tooltips and highlighting on graph entities (4) Search for and focus on graph entities.

A Windows Forms Viewer control (Microsoft.Msagl.GraphViewerGdi.dll) - NuGet package The viewer control lets you visualize graphs and has and some other rendering functionality. Key features: (1) Pan and Zoom (2) Navigate Forward and Backward (3) tooltips and highlighting on graph entities (4) Search for and focus on graph entities.

Code Samples

The code snippets demonstrate the basic usage of the viewer. It uses the C# language.

The Viewer sample

Drawing of the graph from the sampleDrawing of the graph from the sample

Drawing of the graph from the sampleDrawing of the graph from the sample

using System;
using System.Collections.Generic; 
using System.Windows.Forms; 
class ViewerSample { 
    public static void Main() { 
    //create a form 
        System.Windows.Forms.Form form = new System.Windows.Forms.Form();
    //create a viewer object 
        Microsoft.Msagl.GraphViewerGdi.GViewer viewer = new Microsoft.Msagl.GraphViewerGdi.GViewer();
    //create a graph object 
        Microsoft.Msagl.Drawing.Graph graph = new Microsoft.Msagl.Drawing.Graph("graph");
    //create the graph content 
        graph.AddEdge("A", "B");
        graph.AddEdge("B", "C");
        graph.AddEdge("A", "C").Attr.Color = Microsoft.Msagl.Drawing.Color.Green;
        graph.FindNode("A").Attr.FillColor = Microsoft.Msagl.Drawing.Color.Magenta;
        graph.FindNode("B").Attr.FillColor = Microsoft.Msagl.Drawing.Color.MistyRose;
        Microsoft.Msagl.Drawing.Node c = graph.FindNode("C");
        c.Attr.FillColor = Microsoft.Msagl.Drawing.Color.PaleGreen;
        c.Attr.Shape = Microsoft.Msagl.Drawing.Shape.Diamond;
    //bind the graph to the viewer 
        viewer.Graph = graph;
    //associate the viewer with the form 
        form.SuspendLayout();
        viewer.Dock = System.Windows.Forms.DockStyle.Fill;
        form.Controls.Add(viewer);
        form.ResumeLayout();
    //show the form 
        form.ShowDialog();
    } 
}

More code samples can be found here…

GraphMaps

GraphMaps lets you view very large graphs like oneline maps - as you zoom in more detail is revealed. Watch a video that shows how GraphMaps works, and here is the video of the previous version.

Using GraphMaps

  • open Lg.sln and build the solution,
  • run TestGraphMaps.

NOTES:

  • The configuration Release/x64 needs to be used to load a large graph.
  • The graph from the video can be found in GraphLayout/graphs/composers.zip. Please load composers.msagl to avoid the preprocessing step.
  • If composers.dot is loaded then composers.msagl and the tiles directory composers.msagl_tiles will be regenerated.

Learn More

The ideas, design, and the mathematics of GraphMaps are described in this paper.

Layouts Created by MSAGL

MSAGL in JavaScript

WebMSAGL is a version of MSAGL that was transcompiled to JavaScript with SharpKit, plus a TypeScript wrapper and rendering/interaction layer that provides a friendly TypeScript API. You can create a graph either programmatically or from a JSON object, have MSAGL create a layout for it, and then render it to an HTML Canvas or to an SVG block. All layout operations are run in a web worker, ensuring that your application remains responsive while computation is taking place. Limited interactivity is also supported.

Using WebMSAGL

  • open WebMsagl.sln and build the solution,
  • set index.html from any of the sample folders as the starting page,
  • run WebMsagl.

Code of Conduct

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact [email protected] with any additional questions or comments.

Build

Build Status

Producing a release

A release containing the binaries of agl.exe can be created automatically by a github action of ".github\workflows\agl.yaml'. To invoke the action do the following. Create a new tag in the form "v*". For example, "git tag -a v_11 -m "some comment here"". Then execute git push with this tag: "git push origin v_11". These should trigger the release creation. Alternatively, you can use python script "createRelease.py", as following "python createRelease.py 1.1.1".