Fixes for webgui and more native gui development

yms/view/view.py

@@ -27,25 +27,25 @@ class View:
         self.topwidget = builder.get_object("topobject")
         gtkutils.init_named_controls(self, builder)
 
-    def format_int(self, ival, separator=True, suffix=None):
+    def format_int(self, ival, separator=True, suffix=None, default=''):
         if ival is None:
-            return ''
+            return default
         formatted = locale.format_string("%d", ival, separator)
         if suffix:
             formatted += f"\u00A0{suffix}"
         return formatted
 
-    def format_float(self, fval, digits=2, grouping=True, suffix=None):
+    def format_float(self, fval, digits=2, grouping=True, suffix=None, default=''):
         if fval is None:
-            return ''
+            return default
         formatted = locale.format_string(f"%.{digits}f", fval, grouping)
         if suffix:
             formatted += f"\u00A0{suffix}"
         return formatted
 
-    def format_date(self, dval):
+    def format_date(self, dval, default=''):
         if dval is None:
-            return ''
+            return default
         return dval.strftime(self.context.datefmt)
 
     def on_textview_keypress(self, widget, event):