/// <summary>
/// Called to paint the control.
/// </summary>
protected override void OnPaint(PaintEventArgs e)
{
int xPos = 0;
int visibleValues = (Width - xPos) / SPACING;
int firstValueIdx = values.Count - visibleValues;
if (firstValueIdx < 0)
{
firstValueIdx = 0;
}
double minValue = 0.0;
double maxValue = 0.0;
double total = 0.0;
// clear all stats.
statistics.Clear();
for (int valIdx = firstValueIdx; valIdx < values.Count; ++valIdx)
{
Measurement msr = values[valIdx];
double val = msr.Value;
if (valIdx != firstValueIdx)
{
if (val < minValue)
{
minValue = val;
}
if (val > maxValue)
{
maxValue = val;
}
}
else
{
maxValue = val + 1.0;
minValue = val - 1.0;
}
// add statistics value for this group if it's not there yet.
if (!statistics.ContainsKey(msr.Color))
{
statistics[msr.Color] = new Statistics(msr.Color, val);
}
else
{
statistics[msr.Color].AddValue(val);
}
total += val;
}
int avg = (int)Math.Round(total / values.Count);
for (int valIdx = firstValueIdx; valIdx < values.Count; ++valIdx)
{
Measurement msr = values[valIdx];
double val = msr.Value;
double ratio = (val - minValue) / (maxValue - minValue);
int yPos = (int)Math.Round(ratio * (double)Height);
e.Graphics.DrawLine(
new Pen(msr.Color),
new Point(xPos, Height - yPos),
new Point(xPos, Height));
xPos += SPACING;
}
}
/// <summary>
/// Adds a Measurement object.
/// </summary>
public void AddValue(Measurement measurement)
{
values.Add(measurement);
Invalidate();
}
/// <summary>
/// Adds a Measurement object.
/// </summary>
public void AddValue(Measurement measurement)
{
values.Add(measurement);
Invalidate();
}