private LegendItem GetWaterfallLegendItem(object source, string label, int index, ChartLegend legend)
{
var legenditem = new LegendItem
{
Index = index,
Series = VisibleSeries[0],
Legend = legend
};
Binding binding = new Binding();
binding.Source = source;
binding.Path = new PropertyPath("Interior");
BindingOperations.SetBinding(legenditem, LegendItem.InteriorProperty, binding);
legenditem.Label = label;
return(legenditem);
}
internal void ComputeToggledSegment(ChartSeriesBase series, LegendItem legendItem)
{
var toggledSegment = GetSegment(series.Segments, legendItem.Item);
var circularSeries = series as CircularSeriesBase;
int toggledIndex = circularSeries != null && !double.IsNaN(circularSeries.GroupTo) ? series.Segments.IndexOf(toggledSegment) : series.ActualData.IndexOf(legendItem.Item);
if (toggledSegment != null && toggledSegment.IsSegmentVisible)
{
series.ToggledLegendIndex.Add(toggledIndex);
toggledSegment.IsSegmentVisible = false;
legendItem.Opacity = 0.5d;
}
else
{
series.ToggledLegendIndex.Remove(toggledIndex);
toggledSegment.IsSegmentVisible = true;
legendItem.Opacity = 1d;
}
ChartArea.ScheduleUpdate();
}
private static void OnSeriesVisible(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
LegendItem legendItem = d as LegendItem;
legendItem.OnPropertyChanged("IsSeriesVisible");
var series = legendItem.legend.ChartArea.ActualSeries;
if (series[0].IsSingleAccumulationSeries && !legendItem.legend.isSegmentsUpdated)
{
legendItem.legend.ComputeToggledSegment(series[0], legendItem);
}
else
{
if (legendItem.IsSeriesVisible)
{
legendItem.Opacity = 1d;
}
else
{
legendItem.Opacity = 0.5d;
}
}
}
private void SetLegendItems(ChartLegend legend, int index)
{
var series = HasDataPointBasedLegend() ? legend.Series : VisibleSeries[0];
var yvalues = series.ActualSeriesYValues[0] as List <double>;//When EmptyPoint is set last legend is not rendered.-WPF-18794
var circularSeries = series as CircularSeriesBase;
bool isGroupTo = circularSeries != null && !double.IsNaN(circularSeries.GroupTo);
if (isGroupTo)
{
var groupToYValues = circularSeries.GetGroupToYValues();
yvalues = groupToYValues.Item1 as List <double>;
}
LegendItems[index].Clear();
int j = 0;
var Segments = series.Segments.ToList();
if (series is FunnelSeries)
{
Segments.Reverse();
}
for (int i = 0; i < yvalues.Count; i++)
{
var legendIndex = i;
if (double.IsNaN(yvalues[i]))
{
if (!(series is TriangularSeriesBase) && !(series is CircularSeriesBase3D))
{
j++;
}
continue;
}
LegendItem legenditem;
//Created duplicate legends to measure if segments are not created WPF-26728
if (Segments.Count == 0)
{
legenditem = new LegendItem
{
Index = legendIndex,
Series = series,
Legend = legend
};
}
else
{
var item = Segments[j];
legenditem = new LegendItem
{
Index = legendIndex, //WPF-14337 Legend value wrong while using empty point in accumulation series
Item = item.Item,
Series = series,
Legend = legend
};
if (series.ToggledLegendIndex.Count > 0 && (legend.CheckBoxVisibility == Visibility.Visible || legend.ToggleSeriesVisibility))
{
if (!item.IsSegmentVisible)
{
legend.isSegmentsUpdated = true;
legenditem.IsSeriesVisible = false;
legend.isSegmentsUpdated = false;
}
}
Binding binding = new Binding();
binding.Source = item;
binding.Path = new PropertyPath("Interior");
BindingOperations.SetBinding(legenditem, LegendItem.InteriorProperty, binding);
}
if (isGroupTo && circularSeries.GroupedData.Count > 0 && legenditem.Index == Segments.Count - 1)
{
legenditem.Label = circularSeries.GroupingLabel;
}
else if (legenditem.Item != null)
{
legenditem.Label = series.GetActualXValue(series.ActualData.IndexOf(legenditem.Item)).ToString();
}
else
{
legenditem.Label = series.GetActualXValue(legenditem.Index).ToString();
}
LegendItems[index].Add(legenditem);
j++;
}
}
internal void SetLegendItemsSource(ChartLegend legend, int index)
{
if (legend == null || ActualSeries == null)
{
return;
}
legend.ChartArea = this;
//HasDataPointBasedLegend() will return true when need to generate data point based legend items.
if ((VisibleSeries.Count == 1 && VisibleSeries[0].IsSingleAccumulationSeries) || HasDataPointBasedLegend())
{
SetLegendItems(legend, index);
}
else if (VisibleSeries.Count == 1 && VisibleSeries[0] is WaterfallSeries)
{
SetWaterfallLegendItems(legend, index);
legend.XAxis = VisibleSeries[0].IsActualTransposed ? (VisibleSeries[0] as ISupportAxes).ActualYAxis : (VisibleSeries[0] as ISupportAxes).ActualXAxis;
legend.YAxis = VisibleSeries[0].IsActualTransposed ? (VisibleSeries[0] as ISupportAxes).ActualXAxis : (VisibleSeries[0] as ISupportAxes).ActualYAxis;
}
else
{
var technicalIndicators = new List <ChartSeriesBase>();
var sfChart = this as SfChart;
if (sfChart != null)
{
foreach (ChartSeries indicator in sfChart.TechnicalIndicators)
{
technicalIndicators.Add(indicator as ChartSeriesBase);
}
}
List <ChartSeriesBase> actualLegendSeries = sfChart != null?ActualSeries.Union(technicalIndicators).ToList() : ActualSeries;
if (AreaType == ChartAreaType.PolarAxes || AreaType == ChartAreaType.CartesianAxes && Legend is ChartLegendCollection)
{
actualLegendSeries = (from actualSeries in actualLegendSeries
where
GetActualRow(legend) == GetActualRow(actualSeries.IsActualTransposed ? actualSeries.ActualXAxis : actualSeries.ActualYAxis) &&
GetActualColumn(legend) == GetActualColumn(actualSeries.IsActualTransposed ? actualSeries.ActualYAxis : actualSeries.ActualXAxis)
select actualSeries).ToList();
}
if (actualLegendSeries.Count > 0 && actualLegendSeries[0] is ISupportAxes)
{
legend.XAxis = actualLegendSeries[0].IsActualTransposed ? (actualLegendSeries[0] as ISupportAxes).ActualYAxis : (actualLegendSeries[0] as ISupportAxes).ActualXAxis;
legend.YAxis = actualLegendSeries[0].IsActualTransposed ? (actualLegendSeries[0] as ISupportAxes).ActualXAxis : (actualLegendSeries[0] as ISupportAxes).ActualYAxis;
}
IEnumerable <ChartSeriesBase> legendSeries;
switch (AreaType)
{
case ChartAreaType.CartesianAxes:
legendSeries = from series in actualLegendSeries
where series is ISupportAxes2D || series is ISupportAxes3D
select series;
break;
case ChartAreaType.PolarAxes:
legendSeries = from series in actualLegendSeries
where series is PolarRadarSeriesBase
select series;
break;
default:
legendSeries = from series in actualLegendSeries
where series is AccumulationSeriesBase || series is CircularSeriesBase3D
select series;
break;
}
var chartSeries = legendSeries as ChartSeries[] ?? legendSeries.ToArray();
foreach (var series in chartSeries)
{
if (series.IsSeriesVisible)
{
if (LegendItems[index].Count > 0 && index < LegendItems[index].Count)//Legend not cleared when bind Series in MVVM view model-WPF-18625
{
LegendItems[index].Clear();
}
}
}
foreach (var item in chartSeries.Where(series => series.VisibilityOnLegend == Visibility.Visible))
{
var containlegenditem = LegendItems[index].Where(it => it.Series == item).ToList();
if (LegendItems.Count == 0 || containlegenditem.Count() == 0)
{
var legenditem = new LegendItem {
Legend = legend, Series = item
};
if (item.IsSingleAccumulationSeries)
{
legenditem.Legend.isSegmentsUpdated = true;
if (item.IsSeriesVisible)
{
legenditem.IsSeriesVisible = true;
}
else
{
legenditem.IsSeriesVisible = false;
}
legenditem.Legend.isSegmentsUpdated = false;
}
LegendItems[index].Add(legenditem);
}
}
foreach (var item in chartSeries)
{
var cartesian = item as CartesianSeries;
if (cartesian != null)
{
foreach (var trend in cartesian.Trendlines.Where(
trendline => trendline.VisibilityOnLegend == Visibility.Visible))
{
var containlegenditem = LegendItems[index].Where(it => it.Trendline == trend).ToList();
if (LegendItems.Count == 0 || containlegenditem.Count() == 0)
{
var trendline = new LegendItem {
Legend = legend, Trendline = trend
};
LegendItems[index].Add(trendline);
trend.UpdateLegendIconTemplate(true);
}
}
}
}
}
}