fitting (#43)

adjustments to fit to see if fit is at least running, could help with #39

Co-authored-by: Dominik Demuth <dominik.demuth@physik.tu-darmstadt.de>
Reviewed-on: #43

src/gui_qt/lib/utils.py

@@ -58,7 +58,7 @@ class RdBuCMap:
         elif val < self.min:
             col = QtGui.QColor.fromRgb(*RdBuCMap._rdbu[-1])
         else:
-            col = QtGui.QColor.fromRgb(*(float(self.spline[i](val)) for i in range(3)))
+            col = QtGui.QColor.fromRgb(*(int(self.spline[i](val)) for i in range(3)))
 
         return col