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fix radar chart negative value rendering bug if startAtZeroEnabled is false for issue #166 #207

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merged 1 commit into from
Aug 12, 2015
+13 −1
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fix radar chart negative value rendering bug if startAtZeroEnabled is false for issue #166 #207

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14 changes: 13 additions & 1 deletion Charts/Classes/Renderers/ChartYAxisRendererRadarChart.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -96,7 +96,17 @@ public class ChartYAxisRendererRadarChart: ChartYAxisRenderer
}
else
{
var first = ceil(Double(yMin) / interval) * interval
var rawValue = Double(yMin) / interval
var first: Double;
// if raw value negative, we need to use floor rather than ceil
if (rawValue < 0)
{
first = floor(rawValue) * interval
}
else
{
first = ceil(Double(yMin) / interval) * interval
}

if (first == 0.0)
{ // Fix for IEEE negative zero case (Where value == -0.0, and 0.0 == -0.0)
Expand Down Expand Up @@ -132,6 +142,8 @@ public class ChartYAxisRendererRadarChart: ChartYAxisRenderer
}

_yAxis.axisMaximum = _yAxis.entries[_yAxis.entryCount - 1]
// set axisMinimum to be the minimum value.
_yAxis.axisMinimum = _yAxis.entries[0]
_yAxis.axisRange = abs(_yAxis.axisMaximum - _yAxis.axisMinimum)
}

Expand Down