public EffortComputer(List <EffortSpan> effortSpans, double defaultMaxEffortValue)
{
if (effortSpans.Count < 2)
{
throw new ArgumentException("effortSpans.Count >= 2", nameof(effortSpans));
}
_effortSpans = effortSpans;
_defaultMaxEffortValue = defaultMaxEffortValue;
LastSpan = _effortSpans.Last();
}
public EffortSpan GetSpan(double?effortValue)
{
double currentPercentage = (effortValue ?? 0) / _defaultMaxEffortValue;
EffortSpan previousSpan = _effortSpans[0];
foreach (var currentSpan in _effortSpans)
{
if (currentPercentage < currentSpan.Threshold)
{
return(previousSpan);
}
previousSpan = currentSpan;
}
return(LastSpan);
}
public Color GetColor(double?effortValue, double?maxEffortValue = null)
{
double currentPercentage = (effortValue ?? 0) / (maxEffortValue ?? _defaultMaxEffortValue);
if (currentPercentage >= LastSpan.Threshold)
{
return(LastSpan.Color);
}
var sourceSpan = _effortSpans[0];
var targetSpan = _effortSpans[1];
EffortSpan previousSpan = _effortSpans[0];
foreach (var currentSpan in _effortSpans)
{
sourceSpan = previousSpan;
targetSpan = currentSpan;
if (currentPercentage < currentSpan.Threshold)
{
break;
}
previousSpan = currentSpan;
}
double percentToTarget =
(currentPercentage - sourceSpan.Threshold) / (targetSpan.Threshold - sourceSpan.Threshold);
var sourceColor = sourceSpan.Color;
var targetColor = targetSpan.Color;
// Define color
return(Color.FromRgba(
sourceColor.R + (percentToTarget * (targetColor.R - sourceColor.R)),
sourceColor.G + (percentToTarget * (targetColor.G - sourceColor.G)),
sourceColor.B + (percentToTarget * (targetColor.B - sourceColor.B)),
sourceColor.A + (percentToTarget * (targetColor.A - sourceColor.A))));
}