/// <summary>
/// Acquire a horizontal category axis and a vertical linear axis.
/// </summary>
/// <param name="firstDataPoint">The first data point.</param>
protected override void GetAxes(DataPoint firstDataPoint)
{
GetAxes(
firstDataPoint,
(axis) => axis.Orientation == AxisOrientation.X,
() =>
{
ScrollableCategoryAxis categoryAxis = new ScrollableCategoryAxis {
Orientation = AxisOrientation.X
};
categoryAxis.ScrollChanged += ScrollableCategoryAxis_ScrollChanged;
return(categoryAxis);
},
(axis) =>
{
IRangeAxis rangeAxis = axis as IRangeAxis;
return(rangeAxis != null && rangeAxis.Origin != null && axis.Orientation == AxisOrientation.Y);
},
() =>
{
IRangeAxis rangeAxis = CreateRangeAxisFromData(firstDataPoint.DependentValue);
rangeAxis.Orientation = AxisOrientation.Y;
if (rangeAxis == null || rangeAxis.Origin == null)
{
throw new InvalidOperationException("No suitable axis is available for plotting the dependent value.");
}
DisplayAxis axis = rangeAxis as DisplayAxis;
if (axis != null)
{
axis.ShowGridLines = true;
}
return(rangeAxis);
});
}
/// <summary>
/// SortOrderProperty property changed handler.
/// </summary>
/// <param name="d">CategoryAxis that changed its SortOrder.</param>
/// <param name="e">Event arguments.</param>
private static void OnSortOrderPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ScrollableCategoryAxis source = (ScrollableCategoryAxis)d;
source.OnSortOrderPropertyChanged();
}