make sure checkbox widget do not get confused with misc values

wcs/fields.py

@@ -553,7 +553,7 @@ class BoolField(WidgetField):
             kwargs['disabled'] = 'disabled'
             value = get_request().get_field(self.field_key)
             form.add_hidden(self.field_key, value=str(value))
-            if value:
+            if value and not value == 'False':
                 self.field_key = 'f%sdisabled' % self.id
                 get_request().form[self.field_key] = 'yes'
             self.field_key = 'f%sdisabled' % self.id

wcs/qommon/form.py

@@ -361,10 +361,16 @@ class CheckboxWidget(quixote.form.CheckboxWidget):
     required attribute, if required the checkbox will have to be checked.
     '''
     def _parse(self, request):
-        quixote.form.CheckboxWidget._parse(self, request=request)
+        self.value = self.name in request.form and not request.form[self.name] in (False, '', 'False')
         if self.required and not self.value:
             self.set_error(self.REQUIRED_ERROR)
 
+    def set_value(self, value):
+        if value in (None, False, '', 'False'):
+            self.value = False
+        else:
+            self.value = True
+
 class UploadedFile:
     def __init__(self, directory, filename, upload):
         self.directory = directory