private LinearAxis GetAxis(DataFormat format)
{
return((LinearAxis)this.Axes.First(a => {
var tag = (a as FrameworkElement).Tag as DataFormat?;
return tag == format;
}));
}
/**
* Callback listens to changes to BindableSeries and updates Chart.Series property accordingly
* This implementation is a workaround because the base Chart.Series property is not a dependencyproperty
* and cannot be bound to. So we create a BindableSeries property which *can* be bound to,
* and then delegate changes to it to the underlying Series property
*/
private void SeriesChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Remove ||
e.Action == NotifyCollectionChangedAction.Replace)
{
_Formats = 0;
for (int i = 0; i < e.OldItems.Count; i++)
{
Remove(((IDataSeries)e.OldItems[i]).Id);
}
var coll = (IEnumerable <IDataSeries>)sender;
for (int i = 0; i < coll.Count(); i++)
{
_Formats |= coll.ElementAt(i).Format;
}
}
if (e.Action == NotifyCollectionChangedAction.Add ||
e.Action == NotifyCollectionChangedAction.Replace)
{
for (int i = 0; i < e.NewItems.Count; i++)
{
Plot((IDataSeries)e.NewItems[i]);
_Formats |= ((IDataSeries)e.NewItems[i]).Format;
}
}
if (e.Action == NotifyCollectionChangedAction.Reset)
{
Clear();
_Formats = 0;
if (((ObservableCollection <IDataSeries>)sender).Count > 0)
{
foreach (var item in ((ObservableCollection <IDataSeries>)sender))
{
Plot(item);
_Formats |= item.Format;
}
}
}
RefreshAxisVisibilities();
}
/**
* This method listens to changes IsVisible property of each series and updates
* the _Formats property and axis visibilities based on what series are visible.
* Basically this method is responsible for hiding axes that have no visible data
*/
private void OnSeriesVisibilityChanged(object sender, DependencyPropertyChangedEventArgs e)
{
var series = (IDataSeries)((CustomLineSeries)sender).DataContext;
if ((bool)e.NewValue)
{
_Formats |= series.Format;
}
else
{
_Formats &= ~series.Format;
foreach (IDataSeries s in BindableSeries)
{
if (s.Format == series.Format && s.IsVisible)
{
_Formats |= series.Format;
break;
}
}
}
RefreshAxisVisibilities();
}
