public ChartViewModel(IDataProvider dataProvider, string chartTitle, string mouseEventGroupId)
{
_dataProvider = dataProvider;
_chartTitle = chartTitle;
MouseEventGroup = mouseEventGroupId;
CreateChartData();
CreateChartSeries();
CreateChartAxis();
// Subscribe to future updates
int i = 0;
_dataProvider.SubscribeUpdates((newValues) =>
{
// Append when new values arrive
_lineData.Append(newValues.XValues, newValues.YValues);
// Zoom the chart to fit
_lineData.InvalidateParentSurface(RangeMode.ZoomToFit);
// Every 100th datapoint, add an annotation
if (i % 100 == 0)
{
Annotations.Add(new InfoAnnotationViewModel()
{
X1 = _lineData.XValues.Last(), Y1 = 0.0
});
}
i++;
});
}
public override void FilterAll()
{
_filteredDataSeries.Clear();
int index = 0;
double animationStepMillisconds = 1;
Action appendPoint = null;
Action onAppendCallback = () =>
{
// 2.) Append the point
_filteredDataSeries.Append(_originalDataSeries.XValues[index], _originalDataSeries.YValues[index]);
_filteredDataSeries.InvalidateParentSurface(RangeMode.ZoomToFit);
// 3.) Schedule another until complete
if (++index < _originalDataSeries.Count)
{
// Achieve some rudimentary easing
animationStepMillisconds *= 1.05;
animationStepMillisconds = Math.Min(animationStepMillisconds, 10);
// Next point
appendPoint();
}
};
appendPoint = () =>
{
TimedMethod.Invoke(onAppendCallback).After((int)animationStepMillisconds).Go();
};
// 1.) Schedule one point to be appended
appendPoint();
}
public MainViewModel()
{
CreateChartData();
CreateChartSeries();
CreateChartAxis();
// Subscribe to future updates
int i = 0;
_dummyDataProvider.SubscribeUpdates((newValues) =>
{
// Append when new values arrive
_lineData.Append(newValues.XValues, newValues.YValues);
// Zoom the chart to fit
_lineData.InvalidateParentSurface(RangeMode.ZoomToFit);
// Every 100th datapoint, add an annotation
if (i % 100 == 0)
{
Annotations.Add(new InfoAnnotationViewModel()
{
X1 = _lineData.XValues.Last(), Y1 = 0.0
});
}
i++;
});
}
public MainViewModel()
{
var dummyDataProvider = new DummyDataProvider();
var lineData = new XyDataSeries <double, double>()
{
SeriesName = "TestingSeries"
};
_renderableSeries = new ObservableCollection <IRenderableSeriesViewModel>();
RenderableSeries.Add(new LineRenderableSeriesViewModel()
{
StrokeThickness = 2,
Stroke = Colors.SteelBlue,
DataSeries = lineData,
StyleKey = "LineSeriesStyle"
});
// Append the initial values to the chart
var initialDataValues = dummyDataProvider.GetHistoricalData();
lineData.Append(initialDataValues.XValues, initialDataValues.YValues);
// Subscribe to future updates
dummyDataProvider.SubscribeUpdates((newValues) =>
{
// Append when new values arrive
lineData.Append(newValues.XValues, newValues.YValues);
// Zoom the chart to fit
lineData.InvalidateParentSurface(RangeMode.ZoomToFit);
});
}
private void UpdatePoint(Point mousePoint)
{
// On Mouse-move, update the latest point
if (_dataSeries != null)
{
_dataSeries.XValues[_dataSeries.Count - 1] = (DateTime)XAxis.GetDataValue(mousePoint.X);
_dataSeries.YValues[_dataSeries.Count - 1] = (double)YAxis.GetDataValue(mousePoint.Y);
_dataSeries.InvalidateParentSurface(RangeMode.None);
}
}
