private void GraphForm_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
if (ClientSize.Width == 0 || ClientSize.Height == 0)
{
return;
}
if (DisplayBuffer == null)
{
DisplayBuffer = new Bitmap(ClientSize.Width, ClientSize.Height);
}
if (!Redraw)
{
e.Graphics.DrawImage(DisplayBuffer, 0, 0);
return;
}
Redraw = false;
// background
Graphics buffer = Graphics.FromImage(DisplayBuffer);
buffer.Clear(Color.DarkBlue);
buffer.SmoothingMode = SmoothingMode.AntiAlias;
// back black ellipse
Point centerPoint = new Point(ClientSize.Width / 2, ClientSize.Height / 2);
int maxRadius = (ClientSize.Height > ClientSize.Width) ? ClientSize.Width / 2 : ClientSize.Height / 2;
maxRadius -= 5;
buffer.FillEllipse(new SolidBrush(Color.Black), GetBoundingBox(centerPoint, maxRadius));
uint localID = IDto32(Network.Local.UserID);
List <Rectangle> contactPoints = new List <Rectangle>();
List <Rectangle> cachePoints = new List <Rectangle>();
// draw circles
int i = 0;
float sweepAngle = 360;
Pen orangePen = new Pen(Color.Orange, 2);
int arcs = 0;
int maxLevels = 10;
int drawBuckets = Routing.BucketList.Count > maxLevels ? maxLevels : Routing.BucketList.Count;
lock (Routing.BucketList)
foreach (DhtBucket bucket in Routing.BucketList)
{
if (sweepAngle < 0.1 || i >= maxLevels)
{
break;
}
// draw lines
if (!bucket.Last)
{
int rad = maxRadius * i / drawBuckets;
uint lowpos = localID >> (32 - i);
lowpos = lowpos << (32 - i);
uint highpos = lowpos | ((uint)1 << 31 - i);
float startAngle = 360 * ((float)lowpos / (float)uint.MaxValue);
if (rad > 0)
{
arcs++;
buffer.DrawArc(orangePen, GetBoundingBox(centerPoint, rad), startAngle, sweepAngle);
buffer.DrawLine(orangePen, GetCircumPoint(centerPoint, rad, lowpos), GetCircumPoint(centerPoint, maxRadius, lowpos));
buffer.DrawLine(orangePen, GetCircumPoint(centerPoint, rad, highpos), GetCircumPoint(centerPoint, maxRadius, highpos));
}
else
{
buffer.DrawLine(orangePen, GetCircumPoint(centerPoint, maxRadius, 0), GetCircumPoint(centerPoint, maxRadius, uint.MaxValue / 2));
}
// draw text
lowpos = localID >> (31 - i);
highpos = (lowpos + 1) << (31 - i);
lowpos = lowpos << (31 - i);
Point textPoint = GetCircumPoint(centerPoint, rad + 10, lowpos + (highpos - lowpos) / 2);
if ((localID & ((uint)1 << (31 - i))) > 0)
{
buffer.DrawString("1", new Font(FontFamily.GenericSansSerif, 8, FontStyle.Bold), new SolidBrush(Color.White), textPoint);
}
else
{
buffer.DrawString("0", new Font(FontFamily.GenericSansSerif, 8, FontStyle.Bold), new SolidBrush(Color.White), textPoint);
}
}
foreach (DhtContact contact in bucket.ContactList)
{
contactPoints.Add(GetBoundingBox(GetCircumPoint(centerPoint, maxRadius, IDto32(contact.UserID)), 4));
if (Routing.InCacheArea(contact.UserID))
{
cachePoints.Add(GetBoundingBox(GetCircumPoint(centerPoint, maxRadius, IDto32(contact.UserID)), 1));
}
}
sweepAngle /= 2;
i++;
}
// draw contacts
foreach (Rectangle rect in contactPoints)
{
buffer.FillEllipse(new SolidBrush(Color.White), rect);
}
foreach (Rectangle rect in cachePoints)
{
buffer.FillEllipse(new SolidBrush(Color.Black), rect);
}
// draw proxies
lock (Network.TcpControl.SocketList)
foreach (TcpConnect connection in Network.TcpControl.SocketList)
{
if (connection.Proxy == ProxyType.Server)
{
buffer.FillEllipse(new SolidBrush(Color.Green), GetBoundingBox(GetCircumPoint(centerPoint, maxRadius, IDto32(connection.UserID)), 4));
}
if (connection.Proxy == ProxyType.ClientNAT || connection.Proxy == ProxyType.ClientBlocked)
{
buffer.FillEllipse(new SolidBrush(Color.Red), GetBoundingBox(GetCircumPoint(centerPoint, maxRadius, IDto32(connection.UserID)), 4));
}
}
// draw self
buffer.FillEllipse(new SolidBrush(Color.Yellow), GetBoundingBox(GetCircumPoint(centerPoint, maxRadius, localID), 4));
// Copy buffer to display
e.Graphics.DrawImage(DisplayBuffer, 0, 0);
}
