Refactory Buefy templates to use WholePage and ThisPage components

plus add `GridFilter.set_choices()` method

tailbone/grids/filters.py

@@ -149,6 +149,7 @@ class GridFilter(object):
 
     value_renderer_factory = DefaultValueRenderer
     data_type = 'string'        # default, but will be set from value renderer
+    choices = {}
 
     def __init__(self, key, label=None, verbs=None, value_enum=None, value_renderer=None,
                  default_active=False, default_verb=None, default_value=None,
@@ -187,6 +188,27 @@ class GridFilter(object):
             return verbs
         return ['equal', 'not_equal', 'is_null', 'is_not_null', 'is_any']
 
+    def set_choices(self, choices):
+        """
+        Set the value choices for the filter, post-construction.  Note that
+        this also will set the value renderer to one which supports choices.
+        """
+        # first must normalize choices
+        if isinstance(choices, OrderedDict):
+            normalized = choices
+        elif isinstance(choices, dict):
+            normalized = OrderedDict([
+                (key, choices[value])
+                for key in sorted(choices)])
+        elif isinstance(choices, list):
+            normalized = OrderedDict([
+                (key, key)
+                for key in choices])
+
+        # store normalized choices, and set renderer
+        self.choices = normalized
+        self.set_value_renderer(ChoiceValueRenderer(self.choices))
+
     def set_value_renderer(self, renderer):
         """
         Set the value renderer for the filter, post-construction.