/// <summary>
/// Initializes a new instance of the <see cref="GraphController{TDataSeries, TXDataPoint, TYDataPoint}"/> class.
/// </summary>
public GraphController()
{
Renderer = new ScrollingLineRenderer <TDataSeries>();
DataSeriesCollection = new ObservableCollection <TDataSeries>();
Range = new GraphRange <TXDataPoint, TYDataPoint>();
_last_render_time = DateTime.Now;
_to_render = new Dictionary <TDataSeries, PendingSeries>();
_pending_series_collection = new GraphDataQueue <List <PendingSeries> >();
RefreshRate = TimeSpan.FromMilliseconds(50);
ClearCommand = new GraphCommand(Clear);
_render_thread = new Thread(RenderThreadMethod);
_render_thread.IsBackground = true;
_render_thread.Start();
}
/// <summary>
/// The rendering thread method.
/// </summary>
private void RenderThreadMethod()
{
while (true)
{
if (!IsPaused)
{
try
{
var pending_list = _pending_series_collection.BlockDequeue();
foreach (var pending_series in pending_list)
{
if (pending_series.IsClearSeries)
{
_pending_series_collection = new GraphDataQueue <List <PendingSeries> >();
_to_render.Clear();
break;
}
if (_to_render.ContainsKey(pending_series.Series))
{
var s = _to_render[pending_series.Series];
s.XX.AddRange(pending_series.XX);
s.YY.AddRange(pending_series.YY);
}
else
{
_to_render[pending_series.Series] = pending_series;
}
}
if (DateTime.Now > _last_render_time.AddMilliseconds(RefreshRate.TotalMilliseconds) && _to_render.Count > 0)
{
GraphDataPoint min_x = _range.MaximumX - _range.MaximumX;
GraphDataPoint max_x = _range.MaximumX;
GraphDataPoint min_y = _range.MinimumY;
GraphDataPoint max_y = _range.MaximumY;
min_x = _to_render.First().Value.XX.First();
max_x = _to_render.First().Value.XX.Last();
if (_range.AutoY)
{
min_y = _to_render.Select(x => x.Value).SelectMany(x => x.YY).Min();
max_y = _to_render.Select(x => x.Value).SelectMany(x => x.YY).Max();
}
if (min_y == max_y)
{
min_y = _range.MinimumY;
max_y = _range.MaximumY;
}
EffectiveMinimumX = min_x;
EffectiveMaximumX = max_x;
EffectiveMinimumY = min_y;
EffectiveMaximumY = max_y;
VirtualMinimumX = EffectiveMinimumX;
VirtualMaximumX = EffectiveMaximumX;
VirtualMinimumY = EffectiveMinimumY;
VirtualMaximumY = EffectiveMaximumY;
_last_render_time = DateTime.Now;
if (Surface != null)
{
var surface_size = Surface.GetSize();
var zoom_rect = Surface.GetZoomRect();
Surface.BeginDraw();
if (zoom_rect.Width > 0 && zoom_rect.Height > 0)
{
var zoom_rect_top_percentage = zoom_rect.Top / surface_size.Height;
var zoom_rect_bottom_percentage = zoom_rect.Bottom / surface_size.Height;
var zoom_rect_left_percentage = zoom_rect.Left / surface_size.Width;
var zoom_rect_right_percentage = zoom_rect.Right / surface_size.Width;
VirtualMinimumY = EffectiveMaximumY - GraphDataPointHelper.ComputeAbsolutePosition(EffectiveMinimumY, EffectiveMaximumY, zoom_rect_bottom_percentage);
VirtualMaximumY = EffectiveMaximumY - GraphDataPointHelper.ComputeAbsolutePosition(EffectiveMinimumY, EffectiveMaximumY, zoom_rect_top_percentage);
VirtualMinimumX = GraphDataPointHelper.ComputeAbsolutePosition(EffectiveMinimumX, EffectiveMaximumX, zoom_rect_left_percentage);
VirtualMaximumX = GraphDataPointHelper.ComputeAbsolutePosition(EffectiveMinimumX, EffectiveMaximumX, zoom_rect_right_percentage);
GraphTransform transform = new GraphTransform();
var scale_x = (float)(surface_size.Width / zoom_rect.Width);
var scale_y = (float)(surface_size.Height / zoom_rect.Height);
var translate_x = (float)-zoom_rect.Left * scale_x;
var translate_y = (float)-zoom_rect.Top * scale_y;
transform = new GraphTransform();
transform.TranslateX = translate_x;
transform.TranslateY = translate_y;
transform.ScaleX = scale_x;
transform.ScaleY = scale_y;
Surface.SetTransform(transform);
}
List <Tuple <TDataSeries, IEnumerable <PointF> > > to_draw = new List <Tuple <TDataSeries, IEnumerable <PointF> > >();
var to_render = _to_render.Select(x => x.Value).ToList();
foreach (var item in to_render)
{
var points = Renderer.Render(Surface, item.Series, _range, item.XX, item.YY, min_x, max_x, min_y, max_y);
to_draw.Add(new Tuple <TDataSeries, IEnumerable <PointF> >(item.Series, points));
}
for (int i = 0; i < to_draw.Count; i++)
{
if (to_draw[i].Item2.Count() > 2)
{
if (to_draw[i].Item1.IsVisible)
{
Renderer.Draw(Surface, to_draw[i].Item1, to_draw[i].Item2, i, to_draw.Count);
}
}
}
Surface.EndDraw();
}
OnEffectiveRangeChanged(EffectiveMinimumX, EffectiveMaximumX, EffectiveMinimumY, EffectiveMaximumY);
OnVirtualRangeChanged(VirtualMinimumX, VirtualMaximumX, VirtualMinimumY, VirtualMaximumY);
}
}
catch (Exception ex)
{
Debug.WriteLine($"Error in RealTimeGraphX:\n{ex.ToString()}");
}
}
else
{
Thread.Sleep(RefreshRate);
}
}
}