protected void StackPoints(IEnumerable <ISeriesView> stackables, AxisOrientation stackAt, int stackIndex,
StackMode mode = StackMode.Values)
{
var stackedColumns = stackables.Select(x => x.ActualValues.GetPoints(x).ToArray()).ToArray();
var maxI = stackedColumns.Select(x => x.Length).DefaultIfEmpty(0).Max();
for (var i = 0; i < maxI; i++)
{
var cols = stackedColumns
.Select(x => x.Length > i
? new StackedSum(Pull(x[i], stackAt))
: new StackedSum()).ToArray();
var sum = new StackedSum
{
Left = cols.Select(x => x.Left).DefaultIfEmpty(0).Sum(),
Right = cols.Select(x => x.Right).DefaultIfEmpty(0).Sum()
};
if (stackAt == AxisOrientation.X)
{
if (mode == StackMode.Percentage)
{
AxisX[stackIndex].BotLimit = 0;
AxisX[stackIndex].TopLimit = 1;
}
else
{
if (sum.Left < AxisX[stackIndex].BotLimit)
{
// ReSharper disable once CompareOfFloatsByEqualityOperator
AxisX[stackIndex].BotLimit = sum.Left == 0
? 0
: ((int)(sum.Left / AxisX[stackIndex].S) - 1) * AxisX[stackIndex].S;
}
if (sum.Right > AxisX[stackIndex].TopLimit)
{
// ReSharper disable once CompareOfFloatsByEqualityOperator
AxisX[stackIndex].TopLimit = sum.Right == 0
? 0
: ((int)(sum.Right / AxisX[stackIndex].S) + 1) * AxisX[stackIndex].S;
}
}
}
if (stackAt == AxisOrientation.Y)
{
if (mode == StackMode.Percentage)
{
AxisY[stackIndex].BotLimit = 0;
AxisY[stackIndex].TopLimit = 1;
}
else
{
if (sum.Left < AxisY[stackIndex].BotLimit)
{
// ReSharper disable once CompareOfFloatsByEqualityOperator
AxisY[stackIndex].BotLimit = sum.Left == 0
? 0
: ((int)(sum.Left / AxisY[stackIndex].S) - 1) * AxisY[stackIndex].S;
}
if (sum.Right > AxisY[stackIndex].TopLimit)
{
// ReSharper disable once CompareOfFloatsByEqualityOperator
AxisY[stackIndex].TopLimit = sum.Right == 0
? 0
: ((int)(sum.Right / AxisY[stackIndex].S) + 1) * AxisY[stackIndex].S;
}
}
}
var lastLeft = 0d;
var lastRight = 0d;
var leftPart = 0d;
var rightPart = 0d;
foreach (var col in stackedColumns)
{
if (i >= col.Length)
{
continue;
}
var point = col[i];
var pulled = Pull(point, stackAt);
//notice using (pulled < 0) or (pulled <= 0) could cause an issue similar to
//https://github.com/beto-rodriguez/Live-Charts/issues/231
//from that issue I changed <= to <
//only because it is more common to use positive values than negative
//you could face a similar issue if you are stacking only negative values
//a work around is forcing (pulled < 0) to be true,
//instead of using zero values, use -0.000000001/
if (pulled < 0)
{
point.From = lastLeft;
point.To = lastLeft + pulled;
point.Sum = sum.Left;
point.Participation = (point.To - point.From) / point.Sum;
point.Participation = double.IsNaN(point.Participation)
? 0
: point.Participation;
leftPart += point.Participation;
point.StackedParticipation = leftPart;
lastLeft = point.To;
}
else
{
point.From = lastRight;
point.To = lastRight + pulled;
point.Sum = sum.Right;
point.Participation = (point.To - point.From) / point.Sum;
point.Participation = double.IsNaN(point.Participation)
? 0
: point.Participation;
rightPart += point.Participation;
point.StackedParticipation = rightPart;
lastRight = point.To;
}
}
}
}
protected void StackPoints(IEnumerable <ISeriesView> stackables, AxisTags stackAt, int stackIndex,
StackMode mode = StackMode.Values)
{
var stackedColumns = stackables.Select(x => x.Values.Points.ToArray()).ToArray();
var maxI = stackedColumns.Select(x => x.Length).DefaultIfEmpty(0).Max();
for (var i = 0; i < maxI; i++)
{
var cols = stackedColumns
.Select(x => x.Length > i
? new StackedSum(Pull(x[i], stackAt))
: new StackedSum()).ToArray();
var sum = new StackedSum
{
Left = cols.Select(x => x.Left).DefaultIfEmpty(0).Sum(),
Right = cols.Select(x => x.Right).DefaultIfEmpty(0).Sum()
};
if (stackAt == AxisTags.X)
{
if (mode == StackMode.Percentage)
{
AxisX[stackIndex].MinLimit = 0;
AxisX[stackIndex].MaxLimit = 1;
}
else
{
if (sum.Left < AxisX[stackIndex].MinLimit)
{
AxisX[stackIndex].MinLimit = sum.Left == 0
? 0
: ((int)(sum.Left / AxisX[stackIndex].S) - 1) * AxisX[stackIndex].S;
}
if (sum.Right > AxisX[stackIndex].MaxLimit)
{
AxisX[stackIndex].MaxLimit = sum.Right == 0
? 0
: ((int)(sum.Right / AxisX[stackIndex].S) + 1) * AxisX[stackIndex].S;
}
}
}
if (stackAt == AxisTags.Y)
{
if (mode == StackMode.Percentage)
{
AxisY[stackIndex].MinLimit = 0;
AxisY[stackIndex].MaxLimit = 1;
}
else
{
if (sum.Left < AxisY[stackIndex].MinLimit)
{
AxisY[stackIndex].MinLimit = sum.Left == 0
? 0
: ((int)(sum.Left / AxisY[stackIndex].S) - 1) * AxisY[stackIndex].S;
}
if (sum.Right > AxisY[stackIndex].MaxLimit)
{
AxisY[stackIndex].MaxLimit = sum.Right == 0
? 0
: ((int)(sum.Right / AxisY[stackIndex].S) + 1) * AxisY[stackIndex].S;
}
}
}
var lastLeft = 0d;
var lastRight = 0d;
var leftPart = 0d;
var rightPart = 0d;
foreach (var col in stackedColumns)
{
if (i >= col.Length)
{
continue;
}
var point = col[i];
var pulled = Pull(point, stackAt);
if (pulled <= 0)
{
point.From = lastLeft;
point.To = lastLeft + pulled;
point.Sum = sum.Left;
point.Participation = (point.To - point.From) / point.Sum;
point.Participation = double.IsNaN(point.Participation)
? 0
: point.Participation;
leftPart += point.Participation;
point.StackedParticipation = leftPart;
lastLeft = point.To;
}
else
{
point.From = lastRight;
point.To = lastRight + pulled;
point.Sum = sum.Right;
point.Participation = (point.To - point.From) / point.Sum;
point.Participation = double.IsNaN(point.Participation)
? 0
: point.Participation;
rightPart += point.Participation;
point.StackedParticipation = rightPart;
lastRight = point.To;
}
}
}
}