Chart draws a chart of some metric, with a configurable window before and after the current point.
The default metric is alt, with a default window of 5 minutes (2.5 mins around the current point in each direction)
<component type="chart" name="chart" />
The component used to be called 'gradient_chart', and type gradient_chart will still work, but is now deprecated and may be removed in
a future version.
<component type="gradient_chart" name="chart" />
use x and y to set the position of the chart
<component type="chart" name="gradient_chart" x="100" />
Set the window size in seconds, defaults to 5*60 = 300.
Smaller windows have a bit more of a scroll effect, so look nicer.
<component type="chart" metric="speed" units="kph" seconds="30" />
<component type="chart" metric="speed" units="kph" seconds="60" />
<component type="chart" metric="speed" units="kph" seconds="90" />
Use any standard metric, with any standard unit. See 04-metrics for more details
<component type="chart" metric="speed" units="kph" />
<component type="chart" metric="accl.x" units="m/s^2" />
Set the height using height
<component type="chart" height="100" />
Set colours using bg, fill, line and text. These can be "r,g,b", or "r,g,b,a".
<component type="chart" bg="255,255,0" fill="0,255,255" line="255,0,255" text="0,0,255" />
Set alpha/transparency using alpha, between 0 and 255.
<component type="chart" alpha="20" />
<component type="chart" alpha="200" />