/// <summary>
/// Creates the LegendItem Control if conditions are right.
/// </summary>
private void CreateLegendItemDataPoint()
{
DataPoint dataPoint = CreateDataPoint();
if (null != PlotArea)
{
// Bounce into the visual tree to get default Style applied
PlotArea.Children.Add(dataPoint);
PlotArea.Children.Remove(dataPoint);
}
dataPoint.SetStyle(ActualDataPointStyle);
LegendItem.Content = Title;
// Start DataContext null to avoid Binding warnings in the output window
LegendItem.DataContext = null;
LegendItem.Loaded += delegate
{
// Wait for Loaded to set the DataPoint
LegendItem.DataContext = dataPoint;
};
}
/// <summary>
/// Creates a legend item from a data point.
/// </summary>
/// <param name="dataPoint">The data point to use to create the legend item.</param>
/// <param name="index">The 1-based index of the Control.</param>
/// <returns>The series host legend item.</returns>
private LegendItem CreatePieLegendItem(DataPoint dataPoint, int index)
{
LegendItem legendItem = CreateLegendItem();
// Set the Content of the LegendItem
legendItem.Content = dataPoint.IndependentValue ?? index;
// Create a representative DataPoint for access to styled properties
DataPoint legendDataPoint = CreateDataPoint();
legendDataPoint.DataContext = dataPoint.DataContext;
if (null != PlotArea)
{
// Bounce into the visual tree to get default Style applied
PlotArea.Children.Add(legendDataPoint);
PlotArea.Children.Remove(legendDataPoint);
}
legendDataPoint.SetStyle(dataPoint.Style);
legendItem.DataContext = legendDataPoint;
return(legendItem);
}
/// <summary>
/// Creates a DataPoint for determining the line color.
/// </summary>
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
if (null != PlotArea)
{
Grid grid = new Grid();
DataPoint dataPoint = CreateDataPoint();
dataPoint.Visibility = Visibility.Collapsed;
dataPoint.Loaded += delegate
{
dataPoint.SetStyle(ActualDataPointStyle);
Background = dataPoint.Background;
if (null != PlotArea)
{
PlotArea.Children.Remove(grid);
}
};
grid.Children.Add(dataPoint);
PlotArea.Children.Add(grid);
}
}
/// <summary>
/// Creates a legend item for each data point.
/// </summary>
/// <param name="dataPoint">The data point added.</param>
protected override void AddDataPoint(DataPoint dataPoint)
{
base.AddDataPoint(dataPoint);
int index = ActiveDataPoints.IndexOf(dataPoint) + 1;
// Grab a style enumerator if we don't have one already.
if (_styleEnumerator == null)
{
_styleEnumerator = this.GetStylesWithTargetType(typeof(PieDataPoint), true);
}
if (_styleEnumerator.MoveNext())
{
Style style = _styleEnumerator.Current;
dataPoint.SetStyle(style);
}
LegendItem legendItem = CreatePieLegendItem(dataPoint, index);
_dataPointLegendItems[dataPoint] = legendItem;
LegendItems.Add(legendItem);
UpdateLegendItemIndexes();
}
/// <summary>
/// Sets the style of the data point to the single style used for all
/// data points.
/// </summary>
/// <param name="dataPoint">The data point to apply the style to.
/// </param>
/// <param name="dataContext">The object associated with the data point.
/// </param>
protected override void PrepareDataPoint(DataPoint dataPoint, object dataContext)
{
dataPoint.SetStyle(ActualDataPointStyle);
base.PrepareDataPoint(dataPoint, dataContext);
}
/// <summary>
/// Sets the style of the data point to the single style used for all
/// data points.
/// </summary>
/// <param name="dataPoint">The data point to apply the style to.
/// </param>
/// <param name="dataContext">The object associated with the data point.
/// </param>
protected override void PrepareDataPoint(DataPoint dataPoint, object dataContext)
{
dataPoint.SetStyle(ActualDataPointStyle);
base.PrepareDataPoint(dataPoint, dataContext);
}
/// <summary>
/// Creates a legend item for each data point.
/// </summary>
/// <param name="dataPoint">The data point added.</param>
protected override void AddDataPoint(DataPoint dataPoint)
{
base.AddDataPoint(dataPoint);
int index = ActiveDataPoints.IndexOf(dataPoint) + 1;
// Grab a style enumerator if we don't have one already.
if (_styleEnumerator == null)
{
_styleEnumerator = this.GetStylesWithTargetType(typeof(PieDataPoint), true);
}
if (_styleEnumerator.MoveNext())
{
Style style = _styleEnumerator.Current;
dataPoint.SetStyle(style);
}
LegendItem legendItem = CreatePieLegendItem(dataPoint, index);
_dataPointLegendItems[dataPoint] = legendItem;
LegendItems.Add(legendItem);
UpdateLegendItemIndexes();
}