/// <summary>
/// Gets the "total amount" text for a given statistic type.
/// The unit type of the text depends on the unit type used for graph painting.
/// </summary>
private string TotalText(Stat stat)
{
float[] totals = TrafficStat.Total(stat, TotalsAverageCount);
if (totals.Length > 0)
{
bool bits = GraphPaint.Scale.InBits; // TODO bad programming practice, code smell.
float average = totals.Average();
if (bits)
{
average *= 8.0f;
}
var trafficValue = new TrafficUnitValue(average, bits);
return(TrafficUnit.Humanize(trafficValue) + "/s");
}
return("N/A");
}
/// <summary>
/// Paints <see cref="TrafficStat"/> on an arbitrary Bitmap.
/// </summary>
public void Paint(Bitmap bitmap, TrafficStat stat)
{
Graphics graphics = Graphics.FromImage(bitmap);
try
{
graphics.Clear(ClearColor);
int amount = bitmap.Width;
float[] downloadTotals = stat.Total(Stat.Download, amount);
float[] uploadTotals = stat.Total(Stat.Upload, amount);
// It's a buggy state if this happens.
if (downloadTotals.Length != uploadTotals.Length)
{
throw new TrafficMeasureException("uneven upload/download totals");
}
// However, it's perfectly fine to get lesser amount of totals than requested.
int realAmount = downloadTotals.Length;
// Totals length may be shorter than the graph width, but we still want
// the graph bars to stick to the right edge.
for (int idx = 0, drawPos = bitmap.Width - realAmount; idx < realAmount; ++idx, ++drawPos)
{
float download = downloadTotals[idx];
float upload = uploadTotals[idx];
float biggerTotal;
Pen biggerPen;
float lowerTotal;
if (download > upload)
{
biggerTotal = download;
lowerTotal = upload;
biggerPen = DownloadPen;
}
else
{
biggerTotal = upload;
lowerTotal = download;
biggerPen = UploadPen;
}
// We're drawing from bottom up, so from graph.Height to 0.
graphics.DrawLine(biggerPen,
drawPos, bitmap.Height,
drawPos, GetDrawY1(biggerTotal, bitmap.Height));
// This bar will always be smaller.
graphics.DrawLine(BothPen,
drawPos, bitmap.Height,
drawPos, GetDrawY1(lowerTotal, bitmap.Height));
// Draw scale text.
}
if (CanPaintScale(bitmap))
{
graphics.DrawString(ScaleText, TextFont, TextBrush, 1, 1);
}
}
finally
{
graphics.Dispose();
}
}
