/// <summary>
/// Removes an axis from the Chart area.
/// </summary>
/// <param name="axis">The axis to remove from the ISeriesHost area.</param>
private void RemoveAxisFromChartArea(Axis axis)
{
axis.LocationChanged -= AxisLocationChanged;
axis.OrientationChanged -= AxisOrientationChanged;
IRequireSeriesHost requiresSeriesHost = axis as IRequireSeriesHost;
if (requiresSeriesHost != null)
{
requiresSeriesHost.SeriesHost = null;
}
_edgeAxes.Remove(axis);
}
/// <summary>
/// Adds an axis to the ISeriesHost area.
/// </summary>
/// <param name="axis">The axis to add to the ISeriesHost area.</param>
private void AddAxisToChartArea(Axis axis)
{
IRequireSeriesHost requiresSeriesHost = axis as IRequireSeriesHost;
if (requiresSeriesHost != null)
{
requiresSeriesHost.SeriesHost = this;
}
if (axis.Location == AxisLocation.Auto)
{
axis.Location = GetAutoAxisLocation(axis);
}
SetEdge(axis);
axis.LocationChanged += AxisLocationChanged;
axis.OrientationChanged += AxisOrientationChanged;
if (axis.Location != AxisLocation.Auto)
{
_edgeAxes.Add(axis);
if (this.ChartArea != null &&
!this.ChartArea.Children.Contains(axis))
{
this.ChartArea.Children.Add(axis);
if (BackgroundElements.Count > 0)
{
foreach (UIElement element in BackgroundElements)
{
this.ChartArea.Children.Insert(0, element);
}
}
}
}
}
/// <summary>
/// Sets the Edge property of an axis based on its location and
/// orientation.
/// </summary>
/// <param name="axis">The axis to set the edge property of.</param>
private static void SetEdge(Axis axis)
{
switch (axis.Location)
{
case AxisLocation.Bottom:
EdgePanel.SetEdge(axis, Edge.Bottom);
break;
case AxisLocation.Top:
EdgePanel.SetEdge(axis, Edge.Top);
break;
case AxisLocation.Left:
EdgePanel.SetEdge(axis, Edge.Left);
break;
case AxisLocation.Right:
EdgePanel.SetEdge(axis, Edge.Right);
break;
}
}
/// <summary>
/// Determines the location of an axis based on the existing axes in
/// the chart.
/// </summary>
/// <param name="axis">The axis to determine the location of.</param>
/// <returns>The location of the axis.</returns>
private AxisLocation GetAutoAxisLocation(Axis axis)
{
if (axis.Orientation == AxisOrientation.X)
{
int numberOfTopAxes = this.InternalActualAxes.OfType<Axis>().Count(currentAxis => currentAxis.Location == AxisLocation.Top);
int numberOfBottomAxes = this.InternalActualAxes.OfType<Axis>().Count(currentAxis => currentAxis.Location == AxisLocation.Bottom);
return (numberOfBottomAxes > numberOfTopAxes) ? AxisLocation.Top : AxisLocation.Bottom;
}
else if (axis.Orientation == AxisOrientation.Y)
{
int numberOfLeftAxes = this.InternalActualAxes.OfType<Axis>().Count(currentAxis => currentAxis.Location == AxisLocation.Left);
int numberOfRightAxes = this.InternalActualAxes.OfType<Axis>().Count(currentAxis => currentAxis.Location == AxisLocation.Right);
return (numberOfLeftAxes > numberOfRightAxes) ? AxisLocation.Right : AxisLocation.Left;
}
else
{
return AxisLocation.Auto;
}
}