private void UpdateSegmentStyle(PieDataPoint point, PieSegment segment, int index)
{
segment.isDefaultStyle = false;
segment.HighlightPath.Fill = this.HighlightBrush;
if (this.segmentStyleSelectorCache != null)
{
Style style = this.segmentStyleSelectorCache.SelectStyle(point, this);
if (style != null)
{
segment.Path.Style = style;
return;
}
}
if (this.segmentStyles.Count > 0)
{
Style style = this.segmentStyles[index % this.segmentStyles.Count];
if (style != null)
{
segment.Path.Style = style;
return;
}
}
segment.Path.Style = this.defaultSegmentStyleCache;
segment.isDefaultStyle = true;
}
private void UpdateSegments()
{
int index = 0;
int realizedIndex = 0;
foreach (PieDataPoint point in this.model.DataPoints)
{
if (point.isEmpty)
{
index++;
continue;
}
if (point.isSelected && point.OffsetFromCenter == 0d)
{
// the point is selected before the ElementTree is loaded, set the property silently (no invalidate)
point.SetPropertySilently(PieDataPoint.OffsetFromCenterPropertyKey, this.selectedPointOffsetCache);
}
PieSegment segment = this.GetSegment(realizedIndex);
segment.Update(point, this.updateContext);
this.UpdateSegmentStyle(point, segment, index);
if (!this.LegendInfos.Contains(segment.LegendItem))
{
this.LegendInfos.Add(segment.LegendItem);
}
if (!DesignMode.DesignModeEnabled)
{
segment.UpdateLegendTitle(this.LegendTitleBinding);
segment.UpdateVisibleInLegend(this.IsVisibleInLegendBinding);
}
index++;
realizedIndex++;
if (point.SweepAngle > PieSegment.ArcSegmentMaxAngle)
{
break;
}
}
// hide extra segments
while (realizedIndex < this.segments.Count)
{
this.segments[realizedIndex].point = null;
this.segments[realizedIndex].Path.Tag = null;
this.segments[realizedIndex].Path.Visibility = Visibility.Collapsed;
this.segments[realizedIndex].HighlightPath.Visibility = Visibility.Collapsed;
this.LegendInfos.Remove(this.segments[realizedIndex].LegendItem);
realizedIndex++;
}
}
internal override void ApplyPaletteCore()
{
base.ApplyPaletteCore();
for (int i = 0; i < this.segments.Count; i++)
{
PieSegment segment = this.segments[i];
if (segment.Path.Visibility == Visibility.Collapsed)
{
continue;
}
Brush fill = null;
Brush stroke = null;
// segment style has higher priority as it comes from our SliceStyles property
// so it should be null in order to apply a palette entry values
if (segment.isDefaultStyle)
{
fill = this.chart.GetPaletteBrush(segment.point.CollectionIndex, PaletteVisualPart.Fill, this.Family, segment.point.isSelected);
stroke = this.chart.GetPaletteBrush(segment.point.CollectionIndex, PaletteVisualPart.Stroke, this.Family, segment.point.isSelected);
}
if (fill != null)
{
segment.Path.Fill = fill;
}
else
{
segment.Path.ClearValue(Shape.FillProperty);
}
if (stroke != null)
{
segment.Path.Stroke = stroke;
}
else
{
segment.Path.ClearValue(Shape.StrokeProperty);
}
segment.UpdateLegendItem();
}
}