private static void OnMinWidthChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FunnelSeries funnelSeries = d as FunnelSeries;
if (funnelSeries != null && funnelSeries.Area != null)
{
funnelSeries.Area.ScheduleUpdate();
}
}
private static void OnFunnelModeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FunnelSeries funnelSeries = d as FunnelSeries;
if (funnelSeries != null && funnelSeries.Area != null)
{
funnelSeries.Area.IsUpdateLegend = true;
funnelSeries.Area.ScheduleUpdate();
}
}
/// <summary>
/// Defines the funnel path
/// </summary>
/// <param name="y"></param>
/// <param name="height"></param>
/// <param name="funnelSeries"></param>
/// <param name="isExploded"></param>
public FunnelSegment(double y, double height, FunnelSeries funnelSeries, bool isExploded)
{
base.Series = funnelSeries;
top = y;
bottom = y + height;
topRadius = y / 2;
bottomRadius = (y + height) / 2;
minimumWidth = funnelSeries.MinWidth;
explodedOffset = funnelSeries.ExplodeOffset;
this.IsExploded = isExploded;
}
/// <summary>
/// Updates the segments based on its data point value. This method is not
/// intended to be called explicitly outside the Chart but it can be overriden by
/// any derived class.
/// </summary>
/// <param name="transformer">Reresents the view port of chart control.(refer <see cref="IChartTransformer"/>)</param>
public override void Update(IChartTransformer transformer)
{
if (!this.IsSegmentVisible)
{
segmentPath.Visibility = Visibility.Collapsed;
}
else
{
segmentPath.Visibility = Visibility.Visible;
}
Rect rect = new Rect(0, 0, transformer.Viewport.Width, transformer.Viewport.Height);
if (rect.IsEmpty)
{
segmentPath.Data = null;
}
else
{
if (this.IsExploded)
{
rect.X = this.explodedOffset;
}
PathFigure figure = new PathFigure();
FunnelSeries series = Series as FunnelSeries;
if (series == null)
{
return;
}
double minRadius = 0.5 * (1d - minimumWidth / rect.Width);
bool isBroken = (topRadius >= minRadius) ^ (bottomRadius > minRadius) && series.FunnelMode == ChartFunnelMode.ValueIsHeight;
double bottomY = minRadius * (bottom - top) / (bottomRadius - topRadius);
topRadius = Math.Min(topRadius, minRadius);
bottomRadius = Math.Min(bottomRadius, minRadius);
figure.StartPoint = new Point(rect.X + topRadius * rect.Width, rect.Y + top * rect.Height);
Linesegment lineSeg1 = new Linesegment();
lineSeg1.Point = new Point(rect.X + (1 - topRadius) * rect.Width, rect.Y + top * rect.Height);
figure.Segments.Add(lineSeg1);
if (isBroken)
{
Linesegment lineSeg2 = new Linesegment();
lineSeg2.Point = new Point(rect.X + (1 - minRadius) * rect.Width, rect.Y + bottomY * rect.Height);
figure.Segments.Add(lineSeg2);
}
Linesegment lineSeg3 = new Linesegment();
lineSeg3.Point = new Point(rect.X + (1 - bottomRadius) * rect.Width, rect.Y + bottom * rect.Height - series.StrokeThickness / 2);
figure.Segments.Add(lineSeg3);
Linesegment lineSeg4 = new Linesegment();
lineSeg4.Point = new Point(rect.X + bottomRadius * rect.Width, rect.Y + bottom * rect.Height - series.StrokeThickness / 2);
figure.Segments.Add(lineSeg4);
if (isBroken)
{
Linesegment lineSeg5 = new Linesegment();
lineSeg5.Point = new Point(rect.X + minRadius * rect.Width, rect.Y + bottomY * rect.Height);
figure.Segments.Add(lineSeg5);
}
figure.IsClosed = true;
this.segmentGeometry = new PathGeometry();
this.segmentGeometry.Figures = new PathFigureCollection()
{
figure
};
segmentPath.Data = segmentGeometry;
height = ((bottom - top) * rect.Height) / 2;
}
}