OMG so many Buefy things...and much to be done yet it seems

these changes are all with Buefy "forms" support in mind.  hopefully didn't
break any legacy/jquery stuff... and yeah, lots more left to do still for the
sake of Buefy forms

tailbone/forms/widgets.py

@@ -130,10 +130,51 @@ class CasesUnitsWidget(dfwidget.Widget):
         return validated
 
 
+class DynamicCheckboxWidget(dfwidget.CheckboxWidget):
+    """
+    This checkbox widget can be "dynamic" in the sense that form logic can
+    control its value and state.
+    """
+    template = 'checkbox_dynamic'
+
+
 class PlainSelectWidget(dfwidget.SelectWidget):
     template = 'select_plain'
 
 
+class CustomSelectWidget(dfwidget.SelectWidget):
+    """
+    This widget is mostly for convenience.  You can set extra kwargs for the
+    :meth:`serialize()` method, e.g.::
+
+       widget.set_template_values(foo='bar')
+    """
+
+    def set_template_values(self, **kw):
+        if not hasattr(self, 'extra_template_values'):
+            self.extra_template_values = {}
+        self.extra_template_values.update(kw)
+
+    def get_template_values(self, field, cstruct, kw):
+        values = super(CustomSelectWidget, self).get_template_values(field, cstruct, kw)
+        if hasattr(self, 'extra_template_values'):
+            values.update(self.extra_template_values)
+        return values
+
+
+class DynamicSelectWidget(CustomSelectWidget):
+    """
+    This is a "normal" select widget, but instead of (or in addition to) its
+    values being set when constructed, they must be assigned dynamically in
+    real-time, e.g. based on other user selections.
+
+    Really all this widget "does" is render some Vue.js-compatible HTML, but
+    the page which contains the widget is ultimately responsible for wiring up
+    the logic for things to work right.
+    """
+    template = 'select_dynamic'
+
+
 class JQuerySelectWidget(dfwidget.SelectWidget):
     template = 'select_jquery'