mg-line-brushing

A extension to metrics-graphics which adds step-wise brushing support to line charts.

Requires metrics-graphics >= v2.5

Caveats

This addon currently only supports the aggregated rollover. When including this addon, args.aggregate_rollover will automatically be set to true.

While it does work with the voronoi setup, d3 raises a few errors in the console, so additional work is required for that. (A PR is more than welcome!)

Usage

Install using bower:

• bower install mg-line-brushing --save

Include dist/mg_line_brushing.js in your build, or include it in your HTML:

• <script src="bower_components/mg-line-brushing/dist/mg_line_brushing.js"></script>

Import the default styles from dist/mg_line_brushing.css, or create your own:

• <link rel="stylesheet" href="bower_components/mg-line-brushing/dist/mg_line_brushing.css" type="text/css" />

Options

Option	Default	Notes
brushing	true	Enable this addon.
brushing_history	true	Enables the stepwise zoom-out. This introduces an element of statefulness into the chart, which can be unhelpful in certain cirumstances. If you are managing state manually, set this to false.
after_brushing	null	An optional callback which is triggered after brushing. E.g. args.after_brushing = function(step) { console.log(step); }. The sole paramter passed to the callback is step, an object consisting of the new bounds for the chart: {min_x: ..., max_x: ..., min_y: ..., max_y: ...}
brushing_manual_redraw	false	If true, this will prevent the chart being redrawn. Useful if you want to defer the update until you're ready. Simply call MG.data_graphic(args); to trigger a redraw.

Requirements

• Node.JS or io.js
• bower
• metrics-graphics >= v2.5

Contributing

Found a bug or have an idea for a new feature? File an issue or, better still, submit a PR :

1. Code your fix / feature.
2. Write some tests.
3. Submit a PR.