private static Tuple <string, NonlinearFitDocument, string, XYPlotLayer> SelectFitDocument(Altaxo.Gui.Graph.Gdi.Viewing.IGraphController ctrl)
{
XYPlotLayer activeLayer = null;
// is a nonlinear fit function plot item selected ?
var funcPlotItem = ctrl.SelectedRealObjects.OfType <XYNonlinearFitFunctionPlotItem>().FirstOrDefault();
if (null != funcPlotItem)
{
activeLayer = Altaxo.Main.AbsoluteDocumentPath.GetRootNodeImplementing <XYPlotLayer>(funcPlotItem);
return(new Tuple <string, NonlinearFitDocument, string, XYPlotLayer>(string.Empty, funcPlotItem.FitDocumentCopy, funcPlotItem.FitDocumentIdentifier, activeLayer)); // if a fit function plot item was selected, then use the fit document of this item
}
// is a normal plot item selected ?
// ------------------------------------------------------------------------------------
var columnPlotItem = ctrl.SelectedRealObjects.OfType <XYColumnPlotItem>().FirstOrDefault();
if (null != columnPlotItem)
{
return(SelectFitDocument(ctrl, columnPlotItem));
}
// is the active layer an XY-plot layer ? Or do we have any XY-plot-layer ?
// ------------------------------------------------------------------------------------
activeLayer = (ctrl.ActiveLayer as XYPlotLayer);
if (null != activeLayer)
{
var result = SelectFitDocument(ctrl, activeLayer);
if (result.Item2 != null)
{
return(result);
}
} // null != activeLayer
activeLayer = TreeNodeExtensions.TakeFromHereToFirstLeaves(ctrl.Doc.RootLayer).OfType <XYPlotLayer>().FirstOrDefault();
if (null != activeLayer)
{
var result = SelectFitDocument(ctrl, activeLayer);
if (result.Item2 != null)
{
return(result);
}
else
{
var localdoc = (ctrl.Doc.GetGraphProperty(FitDocumentPropertyName) as Calc.Regression.Nonlinear.NonlinearFitDocument) ??
(Altaxo.Calc.Regression.Nonlinear.NonlinearFitDocument)_lastFitDocument?.Clone() ??
new Altaxo.Calc.Regression.Nonlinear.NonlinearFitDocument();
return(new Tuple <string, NonlinearFitDocument, string, XYPlotLayer>(null, localdoc, null, activeLayer));
}
} // null != activeLayer
// no idea what to fit - there is not even an XY plot layer
return(new Tuple <string, NonlinearFitDocument, string, XYPlotLayer>("The graph has no XYPlotLayer to host any fit function", null, null, null));
}
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));
}
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));
}