Added empty value handling.

highcharts_core/options/annotations/__init__.py

@@ -128,9 +128,9 @@ def draggable(self, value):
  if value is None:
  self._draggable = None
  else:
- value = validators.string(value, allow_empty = True)
+ value = validators.string(value, allow_empty = True) or ''
  value = value.lower()
- if value not in ['x', 'xy', 'y']:
+ if value not in ['x', 'xy', 'y', '']:
  raise errors.HighchartsValueError(f'draggable must be "x", "xy", "y", '
  f'or "". Was: {value}')
  self._draggable = value

highcharts_core/options/axes/numeric.py

@@ -171,7 +171,7 @@ def categories(self, value):
  if not value:
  self._categories = None
  else:
- self._categories = [validators.string(x) for x in validators.iterable(value)]
+ self._categories = [validators.string(x, allow_empty = True) or '' for x in validators.iterable(value)]
 
  @property
  def date_time_label_formats(self) -> Optional[DateTimeLabelFormats]:

highcharts_core/options/axes/title.py

@@ -3,7 +3,7 @@
 
 from validator_collection import validators
 
-from highcharts_core import errors
+from highcharts_core import errors, constants
 from highcharts_core.metaclasses import HighchartsMeta
 
 
@@ -211,7 +211,7 @@ def style(self, value):
  self._style = validators.string(value, allow_empty = True, coerce_value = True)
 
  @property
- def text(self) -> Optional[str]:
+ def text(self) -> Optional[str | constants.EnforcedNullType]:
  """The actual text of the title.
 
  .. note::
@@ -225,7 +225,10 @@ def text(self) -> Optional[str]:
 
  @text.setter
  def text(self, value):
- self._text = validators.string(value, allow_empty = True)
+ if isinstance(value, constants.EnforcedNullType):
+ self._text = constants.EnforcedNull
+ else:
+ self._text = validators.string(value, allow_empty = True)
 
  @property
  def text_align(self) -> Optional[str]: