/// <summary>
/// Takes two lines and creates a polyon between them
/// </summary>
/// <param name="baseLine"></param>
/// <param name="topLine"></param>
/// <returns></returns>
public static ChartPrimitive LineDiffToPolygon(ChartPrimitive baseLine, ChartPrimitive topLine)
{
ChartPrimitive polygon = new ChartPrimitive();
List <Point> baseLinePoints = baseLine.Points;
List <Point> topLinePoints = topLine.Points;
for (int pointNo = baseLinePoints.Count - 1; pointNo >= 0; --pointNo)
{
polygon.AddPoint(baseLinePoints[pointNo]);
}
for (int pointNo = 0; pointNo < topLinePoints.Count; ++pointNo)
{
polygon.AddPoint(topLinePoints[pointNo]);
}
polygon.Filled = true;
return(polygon);
}
/// <summary>
/// Gets ChartLines and ChartPolygons for the population line, and
/// the target line.
/// </summary>
public static LineAndPolygon ConvertResultsToTargetLineAndPolygon(ChartPrimitive populationLine, float[] results, Color color, string label)
{
// Calculate Target Primitives
ChartPrimitive targetLine = new ChartPrimitive();
targetLine.Color = color;
targetLine.Dashed = true;
targetLine.Label = label + " Target";
targetLine.ShowInLegend = false;
targetLine.HitTest = true;
if (populationLine.Points.Count == results.Length)
{
for (int monthNo = 0; monthNo < results.Length; monthNo += 2)
{
targetLine.AddPoint(new Point(monthNo * .5f, results[monthNo]));
targetLine.AddPoint(new Point(monthNo * .5f + 1f, results[monthNo + 1]));
}
}
else
{
for (int monthNo = 0; monthNo < results.Length; ++monthNo)
{
targetLine.AddPoint(new Point(monthNo, results[monthNo]));
targetLine.AddPoint(new Point(monthNo + 1f, results[monthNo]));
}
}
ChartPrimitive targetPolygon = ChartUtilities.LineDiffToPolygon(populationLine, targetLine);
color.A = (byte)(alpha * color.A);
targetPolygon.Color = color;
targetPolygon.Dashed = true;
targetPolygon.ShowInLegend = false;
targetLine.HitTest = false;
return(new LineAndPolygon(targetLine, targetPolygon));
}
/// <summary>
/// Converts population level to a line and polygon
/// </summary>
/// <param name="results"></param>
/// <param name="color"></param>
/// <param name="label"></param>
/// <returns></returns>
public static LineAndPolygon ConvertResultsToPopulationLineAndPolygon(float[] results, Color color, string label)
{
ChartPrimitive populationLine = new ChartPrimitive();
populationLine.Color = color;
populationLine.Label = label;
populationLine.ShowInLegend = true;
populationLine.HitTest = true;
for (int monthNo = 0; monthNo < results.Length; monthNo += 2)
{
populationLine.AddPoint(new Point(monthNo * .5f, results[monthNo]));
populationLine.AddPoint(new Point(monthNo * .5f + 1f, results[monthNo + 1]));
}
ChartPrimitive populationPolygon = ChartUtilities.ChartLineToBaseLinedPolygon(populationLine);
color.A = (byte)(alpha * color.A);
populationPolygon.Color = color;
populationPolygon.ShowInLegend = false;
populationPolygon.HitTest = false;
return(new LineAndPolygon(populationLine, populationPolygon));
}
} //GetPlotRectangle
/// <summary>
/// Converts a ChartLine object to a ChartPolygon object that has
/// one edge along the bottom Horizontal base line in the plot.
/// </summary>
/// <param name="chartLine"></param>
/// <returns></returns>
public static ChartPrimitive ChartLineToBaseLinedPolygon(ChartPrimitive chartLine)
{
ChartPrimitive chartPolygon = chartLine.Clone();
Point firstPoint = chartPolygon.Points[0];
firstPoint.Y = 0;
Point lastPoint = chartPolygon.Points[chartPolygon.Points.Count - 1];
lastPoint.Y = 0;
chartPolygon.InsertPoint(firstPoint, null, 0);
chartPolygon.AddPoint(lastPoint);
chartPolygon.Filled = true;
return(chartPolygon);
}
/// <summary>
/// Adds a set of lines to the chart for test purposes
/// </summary>
/// <param name="xyLineChart"></param>
public static void AddTestLines(XYLineChart xyLineChart)
{
// Add test Lines to demonstrate the control
xyLineChart.Primitives.Clear();
double limit = 5;
double increment = 1;
// Create 3 normal lines
ChartPrimitive[] lines = new ChartPrimitive[3];
//for (int lineNo = 0; lineNo < 3; ++lineNo)
//{
// ChartPrimitive line = new ChartPrimitive();
// // Label the lines
// line.Filled = true;
// line.Dashed = false;
// line.ShowInLegend = false;
// line.AddPoint(0, 0);
// // Draw 3 sine curves
// for (double x = 0; x < limit + increment*.5; x += increment)
// {
// line.AddPoint(x, Math.Cos(x * Math.PI - lineNo * Math.PI / 1.5));
// }
// line.AddPoint(limit, 0);
// // Add the lines to the chart
// xyLineChart.Primitives.Add(line);
// lines[lineNo] = line;
//}
//// Set the line colors to Red, Green, and Blue
//lines[0].Color = Color.FromArgb(90,255,0,0);
//lines[1].Color = Color.FromArgb(90, 0, 180, 0);
//lines[2].Color = Color.FromArgb(90, 0, 0, 255);
for (int lineNo = 0; lineNo < 3; ++lineNo)
{
ChartPrimitive line = new ChartPrimitive();
// Label the lines
line.Label = "Test Line " + (lineNo + 1);
//line.ShowInLegend = true;
//line.HitTest = true;
line.LineThickness = 1.5;
// Draw 3 sine curves
DateTime date = DateTime.Now;
int i = 0;
for (double x = 0; x < limit + increment * .5; x += increment)
{
line.AddPoint(date.Add(new TimeSpan(0, i++, 0)).Ticks, -2 * Math.Cos(x * Math.PI - lineNo * Math.PI / 1.5));
}
// Add the lines to the chart
xyLineChart.Primitives.Add(line);
lines[lineNo] = line;
}
// Set the line colors to Red, Green, and Blue
lines[0].Color = Colors.Red;
lines[1].Color = Colors.Green;
lines[2].Color = Colors.Blue;
xyLineChart.Title = "Test Chart Title";
xyLineChart.XAxisLabel = "Test Chart X Axis";
xyLineChart.YAxisLabel = "Test Chart Y Axis";
xyLineChart.RedrawPlotLines();
}