private void OnTimeDataSourceChanged()
{
var source = TimeDataSource as NotifingCollection <DateTime>;
TimeLineSource.Clear();
if (source != null)
{
source.CollectionChangedObservable.
Where(eve => eve.EventArgs.Action == NotifyCollectionChangedAction.Add)
.Select(eve => eve.EventArgs.NewItems.Cast <DateTime>())
.Subscribe(dateTimeCollection =>
{
dateTimeCollection.ToObservable()
.Select(date => date.Subtract(TimeSpan.FromSeconds(date.Second)))
.Where(date => !TimeLineSource.Any() || TimeLineSource.LastOrDefault().Date.Equals(date) == false)
.Subscribe(date =>
{
TimeLineSource.Add(new ChartTimeBlock()
{
Date = date
});
});
});
if (source.Any())
{
var startingTime = source.Min();
var endTime = source.Max();
int timeDiffernce = (int)endTime.Subtract(startingTime).TotalMinutes + 1;
// Set the timeline
TimeLineSource = new TimeAxisSource(
Enumerable.Range(0, timeDiffernce)
.Select(index => new ChartTimeBlock()
{
Date = new DateTime(startingTime.Year,
startingTime.Month,
startingTime.Day,
startingTime.Hour,
startingTime.Minute, 0)
.AddMinutes(index),
CanShowDate = index == 0
}));
}
}
}
private void OnSourceChanged(IEnumerable newSource)
{
var source = newSource as ChartLineCollection;
if (source == null)
{
return;
}
HorizontalAxisSource.Clear();
source.CollectionChangedObservable
.Where(eve => eve.EventArgs.Action == NotifyCollectionChangedAction.Add)
.SelectMany(eve => eve.EventArgs.NewItems.Cast <IChartLine>())
.Where(line => line != null && line.Any() && TimeLineSource.Any())
.Subscribe(line =>
{
HorizontalAxisSource.Add(new ChartLine(
line.PinName,
line.Select(point => new ChartPoint(
point.Value,
point.TimeStamp,
GetDisplayPoint(point))
{
PinName = point.PinName, PinType = point.PinType
}),
line.LineColor));
});
source.CollectionChangedObservable
.Where(eve => eve.EventArgs.Action == NotifyCollectionChangedAction.Remove &&
HorizontalAxisSource.Any())
.Select(eve => eve.EventArgs.OldStartingIndex)
.Subscribe(index =>
{
var element = HorizontalAxisSource.ElementAt(index);
if (element != null)
{
HorizontalAxisSource.Remove(element);
}
});
}
private Point GetDisplayPoint(IChartPoint chartPoint)
{
if (VerticalAxis == null || TimeLineSource == null)
{
return(new Point());
}
var ration = (Math.Abs(chartPoint.Value) * VerticalAxis.PointToPixelRatio) / VerticalAxis.MiniTick;
var pointY = chartPoint.Value < 0 ?
VerticalAxis.ZeroPosition + ration :
VerticalAxis.ZeroPosition - ration;
var pointX = TimeLineSource.GetPositionOfMinute(chartPoint.TimeStamp);
// if the point is out of tollerance give it a new Y coordinate
if (Math.Abs(chartPoint.Value) > VerticalAxis.ErrorTolerance)
{
pointY = chartPoint.Value > 0 ?
VerticalAxis.LinesSource.FirstOrDefault().Top - 30 : // bellow the button red line
VerticalAxis.LinesSource.FirstOrDefault().Top + 30; // above the top red line
}
return(new Point(pointX, pointY));
}
