/// <summary>
/// Measure axis ruler information.
/// </summary>
/// <param name="info">Specified axis data information set.</param>
/// <param name="data">Data to be measured.</param>
protected virtual void MeasureAxisRuler(AxisDataInfo info, double data)
{
if (info.Minimum > data)
{
info.Minimum = data;
}
if (info.Maximum < data)
{
info.Maximum = data;
}
info.LargeStride = (info.Maximum - info.Minimum) / 5;
}
/// <summary>
/// Update specified axis information.
/// </summary>
/// <param name="ai">Axis information set.</param>
/// <param name="minData">Minimum value scanned from data range.</param>
/// <param name="maxData">Maximum value scanned from data range.</param>
protected virtual void UpdateAxisInfo(AxisDataInfo ai, double minData, double maxData)
{
var clientRect = this.PlotViewContainer;
double range = maxData - minData;
var isTransposed = HorizontalAxisInfoView.Orientation == AxisOrientation.Vertical;
ai.Levels = (int)Math.Ceiling((isTransposed ? clientRect.Width : clientRect.Height) / 30f);
// when clientRect is zero, nothing to do
if (double.IsNaN(ai.Levels))
{
return;
}
if (minData == maxData)
{
if (maxData == 0)
{
maxData = ai.Levels;
}
else
{
minData = 0;
}
}
int scaler;
double stride = ChartUtility.CalcLevelStride(minData, maxData, ai.Levels, out scaler);
double nearzero = stride / 1E9;
ai.Scaler = scaler;
double m;
if (!ai.AutoMinimum)
{
if (this.AxisOriginToZero(minData, maxData, range))
{
ai.Minimum = 0;
}
else
{
m = minData % stride;
if (Math.Abs(m) < nearzero)
{
ai.Minimum = minData;
}
else
{
if (minData < 0)
{
ai.Minimum = minData - stride - m;
}
else
{
ai.Minimum = minData - m;
}
}
}
}
if (!ai.AutoMaximum)
{
m = maxData % stride;
if (Math.Abs(m) < nearzero)
{
ai.Maximum = maxData;
}
else
{
ai.Maximum = maxData - m + stride;
}
}
ai.Levels = (int)Math.Round((ai.Maximum - ai.Minimum) / stride);
ai.LargeStride = stride;
}
/// <summary>
/// Update specified axis information.
/// </summary>
/// <param name="ai">Axis information set.</param>
/// <param name="minData">Minimum value scanned from data range.</param>
/// <param name="maxData">Maximum value scanned from data range.</param>
protected virtual void UpdateAxisInfo(AxisDataInfo ai, double minData, double maxData)
{
var clientRect = this.PlotViewContainer;
double range = maxData - minData;
ai.Levels = (int)Math.Ceiling(clientRect.Height / 30f);
// when clientRect is zero, nothing to do
if (double.IsNaN(ai.Levels))
{
return;
}
if (minData == maxData)
{
if (maxData == 0)
{
maxData = ai.Levels;
}
else
{
minData = 0;
}
}
int scaler;
double stride = ChartUtility.CalcLevelStride(minData, maxData, ai.Levels, out scaler);
ai.Scaler = scaler;
double m;
if (!ai.AutoMinimum)
{
if (this.AxisOriginToZero(minData, maxData, range))
{
ai.Minimum = 0;
}
else
{
m = minData % stride;
if (m == 0)
{
if (minData == 0)
{
ai.Minimum = minData;
}
else
{
ai.Minimum = minData - stride;
}
}
else
{
if (minData < 0)
{
ai.Minimum = minData - stride - m;
}
else
{
ai.Minimum = minData - m;
}
}
}
}
if (!ai.AutoMaximum)
{
m = maxData % stride;
if (m == 0)
{
ai.Maximum = maxData + stride;
}
else
{
ai.Maximum = maxData - m + stride;
}
}
ai.Levels = (int)Math.Round((ai.Maximum - ai.Minimum) / stride);
ai.LargeStride = stride;
}
/// <summary>
/// Create scatter chart component instance.
/// </summary>
public ScatterChart()
{
SecondaryAxisInfo = new AxisDataInfo();
AddPlotViewLayer(ScatterChartPlotView = new ScatterChartPlotView(this));
}
