/// <summary>
/// Paints <see cref="TrafficStat"/> on a NotifyIcon. It needs native Windows
/// function to destroy the icon. The size of the graph matches small icon size
/// as provided by .NET runtime.
/// </summary>
public void Paint(NotifyIcon icon, TrafficStat stat)
{
Paint(NotifyIconBitmap, stat);
var hicon = NotifyIconBitmap.GetHicon();
icon.Icon = Icon.FromHandle(hicon);
DestroyIcon(hicon);
}
/// <summary>
/// Paints <see cref="TrafficStat"/> on a PictureBox. The size of the graph
/// matches the size of the PictureBox.
/// </summary>
public void Paint(PictureBox graph, TrafficStat stat)
{
if (graph.Width <= 0 || graph.Height <= 0)
{
// Always be resilient to strange states.
// We don't want the repeat of FreeMeter, do we?
return;
}
Bitmap bitmap = graph.Image as Bitmap;
if (bitmap == null || bitmap.Size != graph.Size)
{
bitmap = new Bitmap(graph.Width, graph.Height);
}
Paint(bitmap, stat);
graph.Image = bitmap;
}
/// <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();
}
}
/// <summary>
/// Initiates the monitoring system. Can be called again to reset the monitoring history.
/// </summary>
public void Start()
{
TrafficGrabber.RefreshNics();
TrafficStat = new TrafficStat();
}