Use a heuristic to determine whether thresholds should be inverted, to support plugins with non-standard perfdata output while still being able to parse standard-compliant perfdata input.
Determine perfdata pie color from host or service state, display zero percent piecharts, only render displayabl PieCharts with min and max values, move perfdata to piechart conversion functions into the Perfdata object.
fixes#6423fixes#6200fixes#7170fixes#7304
key=23;0;0;0;0 and key=23;;;; lead to division by zero exceptions
This should fix this by ignoring empty strings for min/max (formerly
it got "converted" to float(0)) and also ignores min == max.
fixes#6828
The perfdata helper did an improper limitation as it might have skipped
valid values due to applying the limit before the filter. When not in compact
view the helper now also shows non-piechart values by using their raw
representation.
refs #6515
Prior to this change the PerfdataSet only knew the labels of a performance
data value which prevented the Perfdata object from being used
individually.
refs #6515
Eric Lippmann
Matthias Jentsch
Thomas Gelf
Johannes Meyer
Michael Friedrich
Thomas Gelf
Marius Hein