2012 Summer Project Week:Charting

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  Projects List

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  A chart with SlicerRT.

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  New chart layout with three charts.

Key Investigators

• GE: Jim Miller
• Isomics: Steve Pieper

Objective

A view for charting was developed at the 2012 Winter Project Week and introduced in Slicer 4.1. The charting architectures includes ArrayNodes, ChartNodes, ChartViews, ChartControllerWidgets. Under the hood, a JavaScript library jqPlot is used for rendering.

Goal for this project is refine and extend the architecture and implementation of this first implementation.

Approach, Plan

Extending jqPlot 

jqPlot is downloaded as a tarball at build time. This limits/complicates our ability to patch the code. Plan to branch the jqPlot development tree using an hg-git bridge.

Hooks 

Extend the use of signals from jqPlot back into Slicer4

Chart types 

Bar charts need a bit of refinement (patching). Error bars are not implemented.

Array provenance 

Arrays are not linked to their source data. This limits the ability auto-color arrays that are derived from data for specific "labels".

Charts for publications 

jqPlot uses an HTML canvas, a rasterized representation.

Updating data 

Exposing data directly to QWebView would allow for data to be updated without reconstructing the chart.

Progress

• Added "3 over 3 Quantitative View"
• Feature requests entered on Mantis
• Line styles implemented, waiting to be merged

Delivery Mechanism

Integrated directly into Slicer4

References

• jqPlot.com