/// <summary>
/// Process the series to build the chart data structure.
/// </summary>
/// <param name="dataset">The dataset.</param>
/// <returns>Data series</returns>
protected virtual ISeries CreateSeries(DataStream dataset)
{
var xI = dataset.FieldNames.IndexOf("x");
var yI = dataset.FieldNames.IndexOf("y");
var wI = dataset.FieldNames.IndexOf("w");
var hI = dataset.FieldNames.IndexOf("h");
var x = new List<TReal>();
var y = new List<TReal>();
var w = new List<TReal>();
var h = new List<TReal>();
//var atts = new List<object>();
//var nameIndices = Enumerable.Range(0, dataset.FieldNames.Count).Except(new[] { xI, yI, wI, hI }).ToArray();
foreach (var dataStreamValue in dataset.Stream)
{
//atts.AddRange(from c in nameIndices select dataStreamValue.Values[c]);
x.Add((TReal)dataStreamValue.Values[xI]);
y.Add((TReal)dataStreamValue.Values[yI]);
w.Add((TReal)dataStreamValue.Values[wI]);
h.Add((TReal)dataStreamValue.Values[hI]);
}
var series = new Series1(x, y, w, h);
//var names = nameIndices.Select(i => dataset.FieldNames[i]).ToArray();
//var types = nameIndices.Select(i => dataset.FieldTypes[i]).ToArray();
//var series = new Series2(x, y, w, h, names, types, atts);
var adapter = new RectangleRenderableSeries(series);
chart.RenderableSeries.Add(adapter);
brd.Visibility = Visibility.Collapsed;
return series;
}
/// <summary>
/// Generates the data stream like service can deliver.
/// </summary>
/// <param name="length">The length.</param>
/// <returns>data stream</returns>
private DataStream GenerateDataStream(int length)
{
var adt = 20;
var names = new[] { "x", "y", "w", "h", "type" };
var types = new[] { typeof(TReal), typeof(TReal), typeof(TReal), typeof(TReal), typeof(string) };
Array.Resize(ref names, names.Length+adt);
Array.Resize(ref types, names.Length + adt);
for (int i = 5; i < names.Length; i++)
{
names[i] = "Field" + i;
types[i] = typeof (double);
}
var stream = new DataStream(names, types, EnumerateDataStreamValues(length, adt));
return stream;
}
protected override ISeries CreateSeries(DataStream dataset)
{
var xI = dataset.FieldNames.IndexOf("x");
var yI = dataset.FieldNames.IndexOf("y");
var wI = dataset.FieldNames.IndexOf("w");
var hI = dataset.FieldNames.IndexOf("h");
var nameIndices = Enumerable.Range(0, dataset.FieldNames.Count).Except(new[] { xI, yI, wI, hI }).ToArray();
var names = nameIndices.Select(i => dataset.FieldNames[i]).ToArray();
var types = nameIndices.Select(i => dataset.FieldTypes[i]).ToArray();
// README Check series
var series = new Series4(names, types);
const int chunkSize = 1000000;
var x = new List<TReal>(chunkSize); var y = new List<TReal>(chunkSize);
var h = new List<TReal>(chunkSize); var w = new List<TReal>(chunkSize);
var atts = new List<object>(chunkSize*nameIndices.Length);
VisualStateManager.GoToState(this, "Loading", true);
Task.Run(() =>
{
try
{
var bufferedChunks = dataset.Stream.Buffer(chunkSize, false);
foreach (var dataStreamValues in bufferedChunks)
{
x.Clear();
y.Clear();
w.Clear();
h.Clear();
atts.Clear();
foreach (var dataStreamValue in dataStreamValues)
{
atts.AddRange(from c in nameIndices select dataStreamValue.Values[c]);
x.Add((TReal) dataStreamValue.Values[xI]);
y.Add((TReal) dataStreamValue.Values[yI]);
w.Add((TReal) dataStreamValue.Values[wI]);
h.Add((TReal) dataStreamValue.Values[hI]);
}
using (chart.SuspendUpdates())
{
series.Append(x, y, w, h, atts);
}
UpdateStatus();
}
Thread.Sleep(2000);
Dispatcher.InvokeAsync(() => brd.Visibility = Visibility.Collapsed);
}
catch(Exception e)
{
txtLoadingStatus.Text = $"Error loading data: {e.Message}";
progressBar.Value = 0;
Trace.WriteLine("Error: " + e);
}
});
// README Check adapter
var adapter = new RectangleRenderableSeries3(series);
chart.RenderableSeries.Add(adapter);
return series;
}
