public static IEnumerable<AxisLabel> GetAxisLabels(Axis axis)
{
return axis.GetVisualDescendents().OfType<AxisLabel>();
}
/// <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>
/// 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 = InternalActualAxes.OfType<Axis>().Where(currentAxis => currentAxis.Location == AxisLocation.Top).Count();
int numberOfBottomAxes = InternalActualAxes.OfType<Axis>().Where(currentAxis => currentAxis.Location == AxisLocation.Bottom).Count();
return (numberOfBottomAxes > numberOfTopAxes) ? AxisLocation.Top : AxisLocation.Bottom;
}
else if (axis.Orientation == AxisOrientation.Y)
{
int numberOfLeftAxes = InternalActualAxes.OfType<Axis>().Where(currentAxis => currentAxis.Location == AxisLocation.Left).Count();
int numberOfRightAxes = InternalActualAxes.OfType<Axis>().Where(currentAxis => currentAxis.Location == AxisLocation.Right).Count();
return (numberOfLeftAxes > numberOfRightAxes) ? AxisLocation.Right : AxisLocation.Left;
}
else
{
return AxisLocation.Auto;
}
}
/// <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);
}
}
/// <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>
/// Rebuilds the chart area if an axis orientation is changed.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="args">Information about the event.</param>
private void AxisOrientationChanged(object sender, RoutedPropertyChangedEventArgs <AxisOrientation> args)
{
Axis axis = (Axis)sender;
axis.Location = GetAutoAxisLocation(axis);
}
