internal static int CalculateYAxis(bool showYAxisText, bool showYAxisLines, IEnumerable <ChartEntry> entries, int yAxisMaxTicks, SKPaint yAxisTextPaint, Position yAxisPosition, int width, out float yAxisXShift, out List <float> yAxisIntervalLabels)
{
yAxisXShift = 0.0f;
yAxisIntervalLabels = new List <float>();
if (showYAxisText || showYAxisLines)
{
var yAxisWidth = width;
var enumerable = entries.ToList(); // to avoid double enumeration
NiceScale.Calculate(enumerable.Min(e => e.Value), enumerable.Max(e => e.Value), yAxisMaxTicks, out var range, out var tickSpacing, out var niceMin, out var niceMax);
var ticks = (int)(range / tickSpacing);
yAxisIntervalLabels = Enumerable.Range(0, ticks)
.Select(i => (float)(niceMax - (i * tickSpacing)))
.ToList();
var longestYAxisLabel = yAxisIntervalLabels.Aggregate(string.Empty, (max, cur) => max.Length > cur.ToString().Length ? max : cur.ToString());
var longestYAxisLabelWidth = MeasureHelper.MeasureTexts(new string[] { longestYAxisLabel }, yAxisTextPaint).Select(b => b.Width).FirstOrDefault();
yAxisWidth = (int)(width - longestYAxisLabelWidth);
if (yAxisPosition == Position.Left)
{
yAxisXShift = longestYAxisLabelWidth;
}
// to reduce chart width
width = yAxisWidth;
}
return(width);
}
internal static int CalculateYAxis(bool showYAxisText, bool showYAxisLines, IEnumerable <ChartEntry> entries, int yAxisMaxTicks, SKPaint yAxisTextPaint, Position yAxisPosition, int width, bool fixedRange, ref float maxValue, ref float minValue, out float yAxisXShift, out List <float> yAxisIntervalLabels)
{
yAxisXShift = 0.0f;
yAxisIntervalLabels = new List <float>();
if (showYAxisText || showYAxisLines)
{
var yAxisWidth = width;
double range, niceMin, niceMax, tickSpacing;
int ticks;
if (!fixedRange)
{
//var enumerable = entries.ToList(); // to avoid double enumeration
if (minValue == maxValue)
{
if (minValue >= 0)
{
maxValue += 100;
}
else
{
maxValue = 0;
}
}
NiceScale.Calculate(minValue, maxValue, yAxisMaxTicks, out range, out tickSpacing, out niceMin, out niceMax);
ticks = (int)(range / tickSpacing);
}
else
{
niceMin = minValue;
niceMax = maxValue;
range = niceMax - niceMin;
tickSpacing = range / (yAxisMaxTicks - 1);
ticks = yAxisMaxTicks;
}
yAxisIntervalLabels = Enumerable.Range(0, ticks)
.Select(i => (float)(niceMax - (i * tickSpacing)))
.ToList();
var longestYAxisLabel = yAxisIntervalLabels.Aggregate(string.Empty, (max, cur) => max.Length > cur.ToString().Length ? max : cur.ToString());
var longestYAxisLabelWidth = MeasureHelper.MeasureTexts(new string[] { longestYAxisLabel }, yAxisTextPaint).Select(b => b.Width).FirstOrDefault();
yAxisWidth = (int)(width - longestYAxisLabelWidth);
if (yAxisPosition == Position.Left)
{
yAxisXShift = longestYAxisLabelWidth;
}
// to reduce chart width
width = yAxisWidth;
maxValue = (float)niceMax;
minValue = (float)niceMin;
}
return(width);
}