/// <summary> Adds a value to the Chart Line </summary>
/// <param name="value">progress value</param>
public void AddValue(ChartLine line, double value)
{
if (double.IsNaN(value))
{
line.DrawValues.Insert(0, 0);
}
else
{
// Insert at first position; Negative values are flatten to 0 (zero)
line.DrawValues.Insert(0, Math.Max(value, 0F));
}
// Remove last item if maximum value count is reached
if (line.DrawValues.Count > MAX_VALUE_COUNT)
{
line.DrawValues.RemoveAt(MAX_VALUE_COUNT);
}
// Calculate horizontal grid offset for "scrolling" effect
gridScrollOffset += line.ValueSpacing;
if (gridScrollOffset > GRID_SPACING)
{
gridScrollOffset = gridScrollOffset % GRID_SPACING;
}
Invalidate();
}
/// <summary>
/// Calculates the vertical Position of a value in relation the chart size,
/// Scale Mode and, if ScaleMode is Relative, to the current maximum value
/// </summary>
/// <param name="value">performance value</param>
/// <returns>vertical Point position in Pixels</returns>
private int CalcVerticalPosition(ChartLine line, decimal value)
{
decimal result = Decimal.Zero;
result = (line.CurrentMaxValue > 0) ? (value * this.MaxChartHeight / (decimal)line.CurrentMaxValue) : 0;
result = this.Height - result;
return(Convert.ToInt32(Math.Round(result)));
}
/// <summary>
/// Returns the currently highest (displayed) value, for Relative ScaleMode
/// </summary>
/// <returns></returns>
private double GetHighestValueForRelativeMode(ChartLine line)
{
double maxValue = 0;
for (int i = 0; i < line.VisibleValues; i++)
{
// Set if higher then previous max value
if (line.DrawValues[i] > maxValue)
{
maxValue = line.DrawValues[i];
}
}
return(maxValue);
}
private void DrawAverageLine(Graphics g, ChartLine line)
{
for (int i = 0; i < line.VisibleValues; i++)
{
line.AverageValue += line.DrawValues[i];
}
if (!double.IsNaN(line.AverageValue / line.VisibleValues))
{
line.AverageValue = line.AverageValue / line.VisibleValues;
}
int verticalPosition = CalcVerticalPosition(line, (decimal)line.AverageValue);
SolidBrush sb = new SolidBrush(line.ChartLinePen.Color);
g.DrawString("Avg: " + (int)line.AverageValue + " " + line.AverageComment, this.Font, sb, 2.0f, verticalPosition - 25);
g.DrawLine(line.ChartLinePen.Pen, 0, verticalPosition, Width, verticalPosition);
}