private static Tuple <string, NonlinearFitDocument, string, XYPlotLayer> SelectFitDocument(Gui.Graph.Gdi.Viewing.IGraphController ctrl, XYColumnPlotItem columnPlotItem)
{
if (null == columnPlotItem)
{
throw new ArgumentNullException(nameof(columnPlotItem));
}
var activeLayer = Altaxo.Main.AbsoluteDocumentPath.GetRootNodeImplementing <XYPlotLayer>(columnPlotItem);
DataColumn columPlotItemDataColumn = columnPlotItem.Data.YColumn.GetUnderlyingDataColumnOrDefault();
if (null != columPlotItemDataColumn)
{
// try to find a nonlinear function plot item whose dependent variable equals to the y of the column plot item
foreach (var funcItem in TreeNodeExtensions.TakeFromHereToFirstLeaves((IGPlotItem)activeLayer.PlotItems).OfType <XYNonlinearFitFunctionPlotItem>())
{
if (object.ReferenceEquals(columPlotItemDataColumn, funcItem.DependentVariableColumn.GetUnderlyingDataColumnOrDefault()))
{
return(new Tuple <string, NonlinearFitDocument, string, XYPlotLayer>(string.Empty, funcItem.FitDocumentCopy, funcItem.FitDocumentIdentifier, activeLayer));
}
}
}
// Get a new fit document from the selected xy plot item
return(GetNewFitDocumentFor(columnPlotItem, ctrl));
}
private static Tuple <string, NonlinearFitDocument, string, XYPlotLayer> SelectFitDocument(Gui.Graph.Gdi.Viewing.IGraphController ctrl, XYPlotLayer activeLayer)
{
if (null == activeLayer)
{
throw new ArgumentNullException(nameof(activeLayer));
}
// try to use the first nonlinear function plot item of the active layer
// ------------------------------------------------------------------------------------
{
var plotItem = TreeNodeExtensions.TakeFromHereToFirstLeaves((IGPlotItem)activeLayer.PlotItems).OfType <XYNonlinearFitFunctionPlotItem>().FirstOrDefault();
if (null != plotItem)
{
return(new Tuple <string, NonlinearFitDocument, string, XYPlotLayer>(string.Empty, plotItem.FitDocumentCopy, plotItem.FitDocumentIdentifier, activeLayer));
}
}
// try to use the active plot item of the active layer
// ------------------------------------------------------------------------------------
if (ctrl.CurrentPlotNumber >= 0)
{
var plotItem = activeLayer.PlotItems.Flattened[ctrl.CurrentPlotNumber] as XYColumnPlotItem;
return(SelectFitDocument(ctrl, plotItem));
}
// try to use the first plot item of the active layer
// ------------------------------------------------------------------------------------
{
var plotItem = TreeNodeExtensions.TakeFromHereToFirstLeaves((IGPlotItem)activeLayer.PlotItems).OfType <XYColumnPlotItem>().FirstOrDefault();
if (null != plotItem)
{
return(SelectFitDocument(ctrl, plotItem));
}
}
return(new Tuple <string, NonlinearFitDocument, string, XYPlotLayer>(null, null, null, null));
}
