added StepsEntry as Alternative between StepsRangeEntry and StepsSequenceEntry

slic/gui/widgets/entries.py

@@ -5,6 +5,7 @@ import wx
 from slic.utils import arithmetic_eval, typename, nice_arange
 
 from ..persist import PersistableWidget
+from .alternative import Alternative
 from .boxes import EXPANDING, STRETCH, make_filled_hbox, make_filled_vbox
 from .fname import increase, decrease
 from .labeled import make_labeled
@@ -21,6 +22,21 @@ ALLOWED_CHARS = set(
 )
 
 
+class StepsEntry(wx.Panel):
+
+    def __init__(self, parent, index=0):
+        super().__init__(parent)
+        steps_range    = StepsRangeEntry(self)
+        steps_sequence = StepsSequenceEntry(self)
+        widgets = (steps_range, steps_sequence)
+        self.alt = alt = Alternative(widgets, index=index)
+        self.SetSizerAndFit(alt)
+
+    def __getattr__(self, name):
+        return getattr(self.alt, name)
+
+
+
 class StepsRangeEntry(wx.Panel):
 
     def __init__(self, parent):