Merge branch 'main' of github.com:maxfordham/ipyautoui into main

src/ipyautoui/autowidgets.py

@@ -6,7 +6,7 @@
 #       extension: .py
 #       format_name: light
 #       format_version: '1.5'
-#       jupytext_version: 1.14.0
+#       jupytext_version: 1.14.5
 #   kernelspec:
 #     display_name: Python 3 (ipykernel)
 #     language: python
@@ -27,7 +27,11 @@
 import ipywidgets as w
 import traitlets as tr
 from copy import deepcopy
-from ipyautoui.custom import modelrun, markdown_widget, filechooser   #, fileupload #<- `fileupload` causes circular import
+from ipyautoui.custom import (
+    modelrun,
+    markdown_widget,
+    filechooser,
+)  # , fileupload #<- `fileupload` causes circular import
 from ipyautoui._utils import remove_non_present_kwargs
 from datetime import datetime
 import functools
@@ -73,6 +77,22 @@ class Nullable(w.HBox):
     """class to allow widgets to be nullable. The widget that is extended is accessed
     using `self.widget`"""
 
+    disabled = tr.Bool(default_value=False)
+
+    @tr.observe("disabled")
+    def observe_disabled(self, on_change):
+        """If disabled, ensure that the widget is disabled and the button is also."""
+        if self.disabled:
+            if self.widget.value is not None:
+                self.bn.value = False
+            else:
+                self.bn.value = True
+            self.bn.disabled = True
+            self.widget.disabled = True
+        else:
+            self.bn.disabled = False
+            self.widget.disabled = False
+
     def __init__(self, widget_type, schema, *args, **kwargs):
         self.schema = schema
         self.caller = create_widget_caller(schema)
@@ -95,6 +115,7 @@ def __init__(self, widget_type, schema, *args, **kwargs):
         super().__init__([self.bn, self.widget, self.show_none])
         self._init_controls()
         self.value = value
+        self._set_disabled()
 
     def _init_trait(self):
         # NOTE: see test for add_traits that demos usage  -@jovyan at 7/18/2022, 12:11:39 PM
@@ -145,6 +166,11 @@ def _toggle_none(self, onchange):
             self.show_none.layout.display = "None"
             self.value = self.widget.value
 
+    def _set_disabled(self):
+        """If disabled in schema, set to value defined."""
+        if "disabled" in self.schema:
+            self.disabled = self.schema["disabled"]
+
 
 def nullable(fn, **kwargs):
     """extend a simple widget to allow None
@@ -457,8 +483,8 @@ def __init__(self, schema):
             schema, calling=markdown_widget.MarkdownWidget
         )
         super().__init__(**self.caller)
-        
-        
+
+
 # class AutoUploadPaths(fileupload.FilesUploadToDir):
 #     def __init__(self, schema):
 #         from ipyautoui.custom import modelrun, markdown_widget, filechooser, fileupload
@@ -473,3 +499,6 @@ def __init__(self, schema):
     import doctest
 
     doctest.testmod()
+# -
+
+