v2.0.0-alpha.3 – Interaction Support in Unit Specifications & Config Revision

Breaking Syntax Revision

Revise Axis/Legend Config to match Vega 3 and leverage config parser in Vega 3's parser.

Axis

• Rename axisWidth to domainWidth, axisColor to domainColor, tickLabelColor to labelColor, tickLabelFont to labelFont, tickLabelFontSize to labelFontSize, tickPadding to labelPadding, titleOffset to titlePadding
• Separate Axis from AxisConfig. Make these properties only available as Axis properties: domain, grid, labels, labelMaxLength, labelPadding, maxExtent, minExtent, offset, position, shortTimeLabels, ticks, tickCount, tickSize, titleMaxLength, titlePadding, zindex
• Remove labelAlign, labelBaseline, subdivide, tickSizeMajor, tickSizeMinor, tickSizeEnd from Axis Config

Legend

• Add symbolType
• Remove margin, symbolShape from Legend Config
• Separate Legend from LegendConfig. Make these properties only available as Legend properties: entryPadding, orient, offset, padding, tickCount, zindex
• Remove related code for Vega Legend configs

Scale

• Range config for scale are now available inside config.scale.* (e.g., config.scale.minSize, config.scale.shapes)

Extend Mark Syntax

• Make mark property can be either a mark type or (new) a mark definition object
• Separate CompositeMark such as "error-bar" from (primitive) Mark …
  • Provide API for registering new type of compositeMark

Interaction Syntax

Initial support for specifying interactive behaviours within unit specifications. Four example specifications demonstrate interactive brushing, highlighting, panning & zooming, and dynamic query widgets.

The syntax for interactive selections has subtly changed from our earlier research paper. Complete documentation is forthcoming but, in the interim, please consult these four comments that briefly describe the space of selection specifications currently supported.

Note: We plan to make another release very soon this week that will move all compiled files to build/ folder.