private async static Task <int> Tides(Predictions predictions)
{
var querycount = 0;
predictions.OnQuery += () =>
{
querycount++;
};
// this should cause a query
var tides = await predictions.CurrentTides();
foreach (var tide in tides)
{
Console.WriteLine($"{tide.Date} {tide.Value}");
}
if (tides.Count == 0 || querycount != 1)
{
throw new Exception("Invalid query");
}
// this round should not cause a query
tides = await predictions.CurrentTides();
if (tides.Count == 0 || querycount != 1)
{
throw new Exception("Invalid query");
}
Console.WriteLine();
var extremes = await predictions.CurrentExtremes();
foreach (var e in extremes)
{
Console.WriteLine($"{e.Date} {e.Value} {e.Type}");
}
if (extremes.Count == 0 || querycount != 2)
{
throw new Exception($"Invalid query : {extremes.Count} {querycount}");
}
// this round should not cause a query
extremes = await predictions.CurrentExtremes();
if (extremes.Count == 0 || querycount != 2)
{
throw new Exception("Invalid query");
}
return(0);
}
private async void FrameUpdate(object state)
{
if (Canvas == null)
{
throw new Exception("must have a valid canvas to draw too");
}
// the timer is reentrant, so only allow one instance to run
if (System.Threading.Interlocked.CompareExchange(ref FrameLock, 1, 0) != 0)
{
return;
}
// grab predictions
var tides = await Prediction.CurrentTides();
var suns = await Prediction.CurrentSuns();
// locations
var dimension = Math.Min(Canvas.Width, Canvas.Height);
var center = new Point((dimension / 2f), (dimension / 2f), z: 0f);
var points = new Point[2];
var fontsize = 18f * Ratio;
var fontname = "Courier New";
// outer ring
var ringthickness = (float)Math.Round(0.25f * Ratio, 1);
if (ringthickness < 1f)
{
ringthickness = 1f;
}
var innerradius = dimension / 20f;
var outerradius = (dimension * 0.37f) + innerradius + ringthickness;
var tidelinethickness = (float)Math.Round(0.25f * Ratio, 1);
if (tidelinethickness < 1f)
{
tidelinethickness = 1f;
}
// get time
var now = DateTime.Now;
var later = now.AddHours(24);
// calculate the local min/max
var min = Single.MaxValue;
var max = Single.MinValue;
foreach (var tide in tides)
{
if (tide.Date >= now && tide.Date < later)
{
min = Math.Min(min, tide.Value);
max = Math.Max(max, tide.Value);
}
}
// adjust so that the min/max do not rest on the line
min -= (0.1f * Ratio);
max += (0.1f * Ratio);
// flip the sign of min to bring to 0
min *= -1;
try
{
await Canvas.SuspendLayout();
// clear
Canvas.Clear(RGBA.Black);
// outer ring
Canvas.Ellipse(RingColor, center, width: 2 * outerradius, height: 2 * outerradius, fill: false, border: false, ringthickness);
// clock numbers
for (int i = 1; i <= 24; i++)
{
var angle = i * (360f / 24f);
// draw line
CalculateLineByAngle(center.X, center.Y, angle, outerradius, out points[0].X, out points[0].Y, out points[1].X, out points[1].Y);
Canvas.Polygon(RingColor, points, fill: false, border: false, ringthickness);
// draw number
CalculateLineByAngle(center.X, center.Y, angle, outerradius + (25f * Ratio), out points[0].X, out points[0].Y, out points[1].X, out points[1].Y);
// adjust for the font size
points[1].X -= (15f * Ratio);
points[1].Y -= (8f * Ratio);
Canvas.Text(RingColor, points[1], Clocknumber(i), fontsize, fontname);
}
// draw the tides as a sun burst
var count = 0;
foreach (var tide in tides)
{
if (tide.Date >= now && tide.Date < later)
{
if (LowResolution && count++ % 2 == 0)
{
continue;
}
// calculate angles
CalculateAngleByClockface(tide.Date.Hour, tide.Date.Minute, tide.Date.Second, out float hour, out float minute, out float seccond);
// calculate the magnitude of the line
var distance = ((tide.Value + min) / (min + max)) * (outerradius - innerradius);
// calculate the line
CalculateLineByAngle(center.X, center.Y, hour, innerradius, out points[1].X, out points[1].Y, out points[0].X, out points[0].Y);
CalculateLineByAngle(points[0].X, points[0].Y, hour, distance, out points[0].X, out points[0].Y, out points[1].X, out points[1].Y);
// draw the line
var angledelta = Math.Min(Math.Min(Math.Abs(Angle - hour), Math.Abs((Angle + 360) - hour)), Math.Abs(Angle - (hour + 360)));
var color = RGBA.Black;
if (tide.Date.Subtract(now).TotalMinutes < (LowResolution ? 12 : 6))
{
color = CurrentTimeColor;
}
else if (angledelta < 10)
{
color = HighlightHghColor;
}
else if (angledelta < 20)
{
color = HighlightMidColor;
}
else if (angledelta < 30)
{
color = HighlightLowColor;
}
else
{
color = SpokeColor;
}
Canvas.Polygon(color, points, fill: false, border: false, tidelinethickness);
}
}
// insert sunrise/sunset information
foreach (var sun in suns)
{
if (sun.Date.Date == now.Date.Date)
{
// calculate angles
CalculateAngleByClockface(sun.Date.Hour, sun.Date.Minute, sun.Date.Second, out float hour, out float minute, out float seccond);
CalculateLineByAngle(center.X, center.Y, hour, outerradius, out points[1].X, out points[1].Y, out points[0].X, out points[0].Y);
var diameter = (20f * Ratio);
if (sun.Type.Equals("sunrise", StringComparison.OrdinalIgnoreCase))
{
Canvas.Ellipse(RGBA.White, points[0], diameter, diameter, fill: true, border: false, thickness: 2f * Ratio);
}
else if (sun.Type.Equals("sunset", StringComparison.OrdinalIgnoreCase))
{
Canvas.Ellipse(RGBA.White, points[0], diameter, diameter, fill: false, border: true, thickness: 2f * Ratio);
}
else
{
throw new Exception($"unknown sun type : {sun.Type}");
}
}
}
}
finally
{
await Canvas.ResumeLayout();
}
// fire that the frame is done
if (OnRendered != null)
{
OnRendered();
}
// set state back to not running
System.Threading.Volatile.Write(ref FrameLock, 0);
// increase the angle
Angle = (Angle + (LowResolution ? 2f : 0.25f)) % 360f;
}