// Method used to convert an input double in range [_minValue, _maxValue]
// into corresponding rainbow-ordered Color
public Color GetScaledColor(double input)
{
double hue = 0.667d * (maxValue - input) / (1.0d * (maxValue - minValue));
return(ColorScaler.HSL2RGB(hue, 1.0d, 0.5d));
}
/// <summary>
/// Helper method to create FreqPlot markers (bmps)
/// </summary>
/// <param name="sendingChart"> Chart requiring new markers. </param>
private void CreateMarkers(Chart sendingChart)
{
if (sendingChart.ChartAreas.Count == 0)
{
throw new Exception("CreateMarkers was called before chart area was initialized.");
}
// Determine correct Inner Plot Area size
// If chart size has not yet been set up, initialize default values
// default values are correct for _viewerWidth = 1050 and _viewerHeight = 800
int plottableWidth;
int plottableHeight;
if (sendingChart.ChartAreas[0].InnerPlotPosition.Width == 0 ||
sendingChart.ChartAreas[0].InnerPlotPosition.Height == 0 ||
sendingChart.ChartAreas[0].Position.Width == 0 ||
sendingChart.ChartAreas[0].Position.Height == 0)
{
plottableWidth = (int)(90.0f * (94.0f * sendingChart.ClientSize.Width / 100.0f) / 100.0f);
plottableHeight = (int)(90.0f * (94.0f * sendingChart.ClientSize.Height / 100.0f) / 100.0f);
}
else
{
plottableWidth = (int)(sendingChart.ChartAreas[0].InnerPlotPosition.Width
* (sendingChart.ChartAreas[0].Position.Width
* sendingChart.ClientSize.Width / 100.0f) / 100.0f);
plottableHeight = (int)(sendingChart.ChartAreas[0].InnerPlotPosition.Height
* (sendingChart.ChartAreas[0].Position.Height
* sendingChart.ClientSize.Height / 100.0f) / 100.0f);
}
// Determine color scaling parameters and generate ColorScaler
double minFreqMag = Double.MaxValue;
double maxFreqMag = Double.MinValue;
foreach (List <PointD> pointList in freqTransVals)
{
foreach (PointD point in pointList)
{
if (point.Y < minFreqMag)
{
minFreqMag = point.Y;
}
if (point.Y > maxFreqMag)
{
maxFreqMag = point.Y;
}
}
}
ColorScaler scaler = new ColorScaler(minFreqMag, maxFreqMag);
// Initialize marker images
int markerWidth;
int markerHeight = (int)Math.Max(1.0d, plottableHeight / freqTransVals.Count);
int colorIndex = 0;
foreach (NamedImage image in sendingChart.Images)
{
image.Dispose();
}
sendingChart.Images.Clear();
foreach (List <PointD> freqValsList in freqTransVals)
{
markerWidth = (int)Math.Max(1.0d, plottableWidth / (double)freqValsList.Count);
foreach (PointD freqVal in freqValsList)
{
Bitmap marker = new Bitmap(markerWidth, markerHeight);
using (Graphics G = Graphics.FromImage(marker)) G.Clear(scaler.GetScaledColor(freqVal.Y));
sendingChart.Images.Add(new NamedImage("MarkerImage" + colorIndex.ToString(), marker));
colorIndex++;
}
}
}