Knowledge map visualization library
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README.md

kmap

Knowledge map visualization library (work in progress)

Demos

The knowledge map library is the core component for Metacademy's interactive knowledge map, e.g. metacademy graph demo

Metacademy Logo

See the html and associated javascript files in /demo

Demo: Khan Academy Content

Demo: Metacademy Content

Installation

  1. Clone this repository

     git clone https://github.com/cjrd/kmap.git
    
  2. Run a local server, e.g.

     python -m SimpleHTTPServer
    
  3. Run the tests by navigating to http://localhost:8000/tests.html

  4. See a simple demo at http://localhost:8000/demo/dev.html

Data Format

The minimal expected data format is as follows (only ids are required):

    [node1, node2, ...]

    nodeX =
    {
            id: "node_id" // this is the only required attribute for nodes
            title: "display title for node"
            summary: "summary of node"
            dependencies: [dep1, dep2, ...]
    }

    depX =
    {
            source: "source_id", // this is the only require attribute for deps
            reason: "reason for dep"
    }

Graph View settings

You can change the following settings by passing an object into the GraphView constructor with the appropriate settings field specified, e.g. from the demo/demojs/khan.js demo: graphView = new KMap.GraphView(settings);

    settings.useWisps {boolean}: show wisp edges instead of long edges (default: true)
    settings.minWispLenPx {number > 0}: the minimum length to make an edge a wisp edge (default: 285)
    settings.includeShortestDep {boolean}: always show the shortest inlink for each node, regardless of its length (default: false)
    settings.includeShortestOutlink {boolean}: always show the shortest outlink for each node, regardless of its length (default: false)
    settings.showEdgeSummary {boolean}: show the edge summary field on hover (default: true)
    settings.showNodeSummar {boolean}: show the node summary field on hover (default: true)
    settings.graphDirection {"BT", "TB", "LR", "RL"}: direction of graph edges, e.g. TB = "top-to-bottom" (default: "TB")
    settings.showTransEdgesWisps {boolean}: show transitive edges as wisps (default: true)

Graph Model settings

You can change the following settings by passing an object into the GraphModel constructor with the appropriate settings field specified, e.g. from the demo/demojs/khan.js demo: var graphModel = new KMap.GraphModel({allowCycles: true});

    settings.addCycles {boolean}: allows cycles in the graph if set to true (default: false)

Notes

The knowledge map visualization library is a work in progress -- it was extracted from the metacademy application codebase. I am currently working on making this code easy to use by itself while still maintaining compatability with metacademy. Please contact me (coloradoNospam at berkeley dot edu, remove the no spam part) if you want to use this code for your own project but are having trouble figuring out the code.