/// <summary>
/// Converts from chart values to chart control size.
/// </summary>
/// <param name="value">value to scale</param>
/// <param name="source">axis orientation to scale value at</param>
/// <param name="chart">chart model to scale value at</param>
/// <param name="axis">axis model instance</param>
/// <returns></returns>
public static double ToPlotArea(double value, AxisOrientation source, ChartCore chart, AxisCore axis)
{
var p1 = new CorePoint();
var p2 = new CorePoint();
if (source == AxisOrientation.Y)
{
p1.X = axis.TopLimit;
p1.Y = chart.DrawMargin.Top;
p2.X = axis.BotLimit;
p2.Y = chart.DrawMargin.Top + chart.DrawMargin.Height;
}
else
{
p1.X = axis.TopLimit;
p1.Y = chart.DrawMargin.Width + chart.DrawMargin.Left;
p2.X = axis.BotLimit;
p2.Y = chart.DrawMargin.Left;
}
var deltaX = p2.X - p1.X;
// ReSharper disable once CompareOfFloatsByEqualityOperator
var m = (p2.Y - p1.Y) / (deltaX == 0 ? double.MinValue : deltaX);
return(m * (value - p1.X) + p1.Y);
}
public double FromPreviousAxisState(double value, AxisTags source, ChartCore chart)
{
if (LastAxisMax == null)
{
return(0);
}
var p1 = new CorePoint();
var p2 = new CorePoint();
if (source == AxisTags.Y)
{
p1.X = LastAxisMax ?? 0;
p1.Y = LastPlotArea.Top;
p2.X = LastAxisMin ?? 0;
p2.Y = LastPlotArea.Top + LastPlotArea.Height;
}
else
{
p1.X = LastAxisMax ?? 0;
p1.Y = LastPlotArea.Width + LastPlotArea.Left;
p2.X = LastAxisMin ?? 0;
p2.Y = LastPlotArea.Left;
}
var deltaX = p2.X - p1.X;
// ReSharper disable once CompareOfFloatsByEqualityOperator
var m = (p2.Y - p1.Y) / (deltaX == 0 ? double.MinValue : deltaX);
var d = m * (value - p1.X) + p1.Y;
return(d);
}
/// <summary>
/// Converts from chart control size to chart values.
/// </summary>
/// <param name="value">value to scale</param>
/// <param name="source">axis orientation to scale value at</param>
/// <param name="chart">chart model to scale value at</param>
/// <param name="axis">axis index in collection of chart.axis</param>
/// <returns></returns>
public static double FromPlotArea(double value, AxisOrientation source, ChartCore chart, int axis = 0)
{
var p1 = new CorePoint();
var p2 = new CorePoint();
if (source == AxisOrientation.Y)
{
p1.X = chart.AxisY[axis].MaxLimit;
p1.Y = chart.DrawMargin.Top;
p2.X = chart.AxisY[axis].MinLimit;
p2.Y = chart.DrawMargin.Top + chart.DrawMargin.Height;
}
else
{
p1.X = chart.AxisX[axis].MaxLimit;
p1.Y = chart.DrawMargin.Width + chart.DrawMargin.Left;
p2.X = chart.AxisX[axis].MinLimit;
p2.Y = chart.DrawMargin.Left;
}
var deltaX = p2.X - p1.X;
// ReSharper disable once CompareOfFloatsByEqualityOperator
var m = (p2.Y - p1.Y) / (deltaX == 0 ? double.MinValue : deltaX);
return((value + m * p1.X - p1.Y) / m);
}
internal double FromPreviousState(double value, AxisTags source, ChartCore chart)
{
if (LastAxisMax == null) return 0;
var p1 = new CorePoint();
var p2 = new CorePoint();
if (source == AxisTags.Y)
{
p1.X = LastAxisMax ?? 0;
p1.Y = LastPlotArea.Top;
p2.X = LastAxisMin ?? 0;
p2.Y = LastPlotArea.Top + LastPlotArea.Height;
}
else
{
p1.X = LastAxisMax ?? 0;
p1.Y = LastPlotArea.Width + LastPlotArea.Left;
p2.X = LastAxisMin ?? 0;
p2.Y = LastPlotArea.Left;
}
var deltaX = p2.X - p1.X;
// ReSharper disable once CompareOfFloatsByEqualityOperator
var m = (p2.Y - p1.Y) / (deltaX == 0 ? double.MinValue : deltaX);
var d = m * (value - p1.X) + p1.Y;
return d;
}
public CorePoint(CorePoint point) : this()
{
X = point.X;
Y = point.Y;
}
public BezierData(CorePoint point)
{
Point1 = point;
Point2 = point;
Point3 = point;
}
public static CorePoint ToPlotArea(CorePoint point, ChartCore chart, int axis = 0)
{
return(new CorePoint(
ToPlotArea(point.X, AxisTags.X, chart, axis),
ToPlotArea(point.Y, AxisTags.Y, chart, axis)));
}
public BezierData(CorePoint point)
{
Point1 = point;
Point2 = point;
Point3 = point;
}
public CorePoint(CorePoint point)
: this()
{
X = point.X;
Y = point.Y;
}