public void Read()
{
spots.Clear();
using (var stream = new FileStream(FilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
using (var streamReader = new StreamReader(stream))
{
while (!streamReader.EndOfStream)
{
var spot = new WsprSpot(streamReader.ReadLine());
if (spot.isValid)
{
spots.Add(spot);
}
}
}
}
private void LoadWsprSpots()
{
if (settings.wsprLogFilePath is null)
{
return;
}
if (!File.Exists(settings.wsprLogFilePath))
{
return;
}
var lastModifiedTime = File.GetLastWriteTime(settings.wsprLogFilePath);
if (lastModifiedTime == wsprLogLastReadModifiedTime)
{
return;
}
else
{
wsprLogLastReadModifiedTime = lastModifiedTime;
}
spots.Clear();
using (var stream = new FileStream(settings.wsprLogFilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
using (var streamReader = new StreamReader(stream))
{
while (!streamReader.EndOfStream)
{
var spot = new WsprSpot(streamReader.ReadLine());
bool isRecent = spot.ageSec <= 30 * 60; // load spots within the last 15 min (apply a more tighter display rule later)
if (spot.isValid && isRecent)
{
spots.Add(spot);
}
}
}
Status($"Loaded {spots.Count} WSPR spots");
}
public static void Spectrogram(
Spectrogram.Spectrogram spec, WsprBand band, List <WsprSpot> spots,
Bitmap bmpSpectrogram, Bitmap bmpVericalScale,
bool drawBandLines, bool drawVerticalLine, ProgramSettings settings)
{
using (Graphics gfx = Graphics.FromImage(bmpSpectrogram))
using (Bitmap bmpIndexed = spec.GetBitmapMax(settings.brightness, reduction: settings.verticalReduction, roll: settings.roll))
using (Pen bandEdgePen = new Pen(Color.White)
{
DashStyle = System.Drawing.Drawing2D.DashStyle.Dash
})
using (Pen grabEdgePen = new Pen(Color.Yellow)
{
DashStyle = System.Drawing.Drawing2D.DashStyle.Dash
})
using (Pen rollPen = new Pen(Color.White))
using (var font = new Font("consolas", 10, FontStyle.Bold))
using (var sfMiddleCenter = new StringFormat {
LineAlignment = StringAlignment.Center, Alignment = StringAlignment.Center
})
using (var sfUpperLeft = new StringFormat {
LineAlignment = StringAlignment.Near, Alignment = StringAlignment.Near
})
{
// copy source bitmaps onto this display bitmap
gfx.DrawImage(bmpIndexed, 0, 0);
gfx.DrawImage(bmpVericalScale, spec.Width, 0);
int wsprBandTopPx = spec.PixelY(band.upperFreq - band.dialFreq, settings.verticalReduction) + 1;
int wsprBandBottomPx = spec.PixelY(band.lowerFreq - band.dialFreq, settings.verticalReduction) + 1;
int qrssBandBottomPx = spec.PixelY(band.lowerFreq - band.dialFreq - 200, settings.verticalReduction) + 1;
int grabTopPx = wsprBandTopPx - settings.grabSavePxAbove;
int grabBotPx = qrssBandBottomPx + settings.grabSavePxBelow;
if (drawBandLines)
{
gfx.DrawLine(bandEdgePen, 0, wsprBandTopPx, spec.Width, wsprBandTopPx);
gfx.DrawLine(bandEdgePen, 0, wsprBandBottomPx, spec.Width, wsprBandBottomPx);
gfx.DrawLine(bandEdgePen, 0, qrssBandBottomPx, spec.Width, qrssBandBottomPx);
gfx.DrawLine(grabEdgePen, 0, grabTopPx - 1, spec.Width, grabTopPx - 1);
gfx.DrawLine(grabEdgePen, 0, grabBotPx, spec.Width, grabBotPx);
}
if (settings.roll && drawVerticalLine)
{
gfx.DrawLine(rollPen, spec.NextColumnIndex, 0, spec.NextColumnIndex, spec.Height);
}
if (settings.isWsprEnabled == false)
{
return;
}
// plot spots in a single segment (the 2m block within a 10m time frame)
for (int segment = 0; segment < 5; segment++)
{
WsprSpot[] segmentSpots = spots
.Where(x => x.segment == segment) // only this segment
.Where(x => Math.Abs(x.frequencyHz - band.dialFreq) < 1e5) // only this band
.OrderBy(x => x.strength).GroupBy(x => x.callsign).Select(x => x.Last()) // only strongest
.OrderBy(x => x.frequencyHz).Reverse().ToArray(); // top to bottom
int segmentX = spec.Width * segment / 5;
if (settings.roll == false && segmentSpots.Length > 0)
{
segmentX = (int)(spec.Width - segmentSpots[0].ageSec / spec.SecPerPx) + 10;
}
for (int spotIndex = 0; spotIndex < segmentSpots.Length; spotIndex++)
{
WsprSpot spot = segmentSpots[spotIndex];
int r = 7;
int y = spec.PixelY(spot.frequencyHz - band.dialFreq, settings.verticalReduction);
// draw the marker
if (spot.isWspr)
{
int xSpot = segmentX + r * 2 * (spotIndex % 8 + 1);
// determine where to place the marker
gfx.FillEllipse(Brushes.Black, xSpot - r, y - r, r * 2, r * 2);
gfx.DrawString($"{spotIndex + 1}", font, Brushes.White, xSpot + 0.5f, y + 1, sfMiddleCenter);
// draw the key label at the top of the band edge
DrawStringWithShadow(gfx, $"{spotIndex + 1}: {spot.callsign} ({spot.strength} dB) ",
segmentX, wsprBandTopPx - settings.grabSavePxAbove + 13 * spotIndex,
font, sfUpperLeft, Brushes.White, Brushes.Black);
}
else
{
// draw the callsign exactly where the spot is on the spectrogram
int xSpot = (int)(segmentX + (spot.dt.Minute % 2 * 60 + spot.dt.Second) / spec.SecPerPx);
DrawStringWithShadow(gfx, spot.callsign, xSpot, y, font, sfUpperLeft, Brushes.White, Brushes.Black);
}
}
}
}
}
