Plot1|2DFrame are stateless, StackedDataFrame switches between widgets that have been created at start up

GUI/View/Canvas/SpecularDataCanvas.cpp

@@ -15,6 +15,7 @@
 #include "GUI/View/Canvas/SpecularDataCanvas.h"
 #include "Base/Util/Assert.h"
 #include "GUI/Model/Data/Data1DItem.h"
+#include "GUI/Model/Job/DataSource.h"
 #include "GUI/Model/Project/ProjectDocument.h"
 #include "GUI/View/Canvas/SavePlotAssistant.h"
 #include "GUI/View/Canvas/SpecularPlotCanvas.h"
@@ -41,13 +42,13 @@ SpecularDataCanvas::SpecularDataCanvas()
 
 Data1DItem* SpecularDataCanvas::dataItem()
 {
-    return m_data_item; // DataFromData().realData1DItem();
+    return DataFromData().realData1DItem();
 }
 
-void SpecularDataCanvas::setDataItem(Data1DItem* item)
+void SpecularDataCanvas::setDataItem()
 {
-    m_data_item = item;
-    m_plot_canvas->setData1DItems({item});
+    if (dataItem())
+	m_plot_canvas->setData1DItems({dataItem()});
 }
 
 QSize SpecularDataCanvas::sizeHint() const