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[BasicUI] Fix unit determination for min/max from item state description #2894

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merged 2 commits into from
Dec 7, 2024
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[BasicUI] Fix unit determination for min/max from item state description #2894

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[BasicUI] Fix unit determination for min/max from state description
lolodomo Dec 3, 2024
e1161c1
Review comment: consider default min/max from system channel type
lolodomo Dec 3, 2024
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22 changes: 19 additions & 3 deletions ....ui.basic/src/main/java/org/openhab/ui/basic/internal/render/ColortemppickerRenderer.java
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Original file line number Diff line number Diff line change
Expand Up @@ -207,8 +207,24 @@ private BigDecimal getMaximumInKelvin(Colortemperaturepicker widget, Unit<?> wid
}

private boolean isUnitInKelvin(StateDescription stateDescription) {
// If no pattern or pattern with no unit, assume unit for min and max is Kelvin
Unit<?> unit = UnitUtils.parseUnit(stateDescription.getPattern());
return unit == null || unit == Units.KELVIN;
// Using the pattern to determine the unit of min/max is not fully reliable
// because the user can override the pattern and set a different unit than
// the one defined by binding developer at channel level.
// So we consider the values of min/max to determine the unit of the range.
// If values are lower than 1000, we assume values are in mirek.
// If values are greater than 1000, we assume values are in Kelvin.
boolean inKelvin;
BigDecimal min = stateDescription.getMinimum();
BigDecimal max = stateDescription.getMaximum();
if (min != null) {
inKelvin = min.doubleValue() >= 1000.0;
} else if (max != null) {
inKelvin = max.doubleValue() > 1000.0;
} else {
// If no pattern or pattern with no unit, assume unit is Kelvin
Unit<?> unit = UnitUtils.parseUnit(stateDescription.getPattern());
inKelvin = unit == null || unit == Units.KELVIN;
}
return inKelvin;
}
}