[Zope3-checkins] SVN: Zope3/branches/philikon-widget-subdirective/src/zope/app/form/ Introduce marker interfaces for marking widget classes according

[Philipp von Weitershausen]

Log message for revision 30760:
  Introduce marker interfaces for marking widget classes according
  to their factory signature (arguments to __init__).
  

Changed:
  U   Zope3/branches/philikon-widget-subdirective/src/zope/app/form/browser/__init__.py
  U   Zope3/branches/philikon-widget-subdirective/src/zope/app/form/interfaces.py

-=-
Modified: Zope3/branches/philikon-widget-subdirective/src/zope/app/form/browser/__init__.py
===================================================================
--- Zope3/branches/philikon-widget-subdirective/src/zope/app/form/browser/__init__.py	2005-06-12 14:06:03 UTC (rev 30759)
+++ Zope3/branches/philikon-widget-subdirective/src/zope/app/form/browser/__init__.py	2005-06-12 14:12:10 UTC (rev 30760)
@@ -72,3 +72,19 @@
 from zope.app.form.browser.sequencewidget import SequenceDisplayWidget
 
 from zope.app.form.browser.objectwidget import ObjectWidget
+
+# mark items and sequence widgets with the correct factory interfaces
+from zope.interface import directlyProvides
+from zope.app.form.interfaces import IVocabularyWidgetFactory
+from zope.app.form.interfaces import ISequenceWidgetFactory
+
+for widget_class in (ItemDisplayWidget, ItemsMultiDisplayWidget,
+                     SetDisplayWidget, ListDisplayWidget, SelectWidget,
+                     DropdownWidget, RadioWidget, MultiSelectWidget,
+                     MultiSelectSetWidget, MultiCheckBoxWidget,
+                     OrderedMultiSelectWidget):
+    directlyProvides(widget_class, IVocabularyWidgetFactory)
+
+for widget_class in (SequenceWidget, TupleSequenceWidget,
+                     ListSequenceWidget, SequenceDisplayWidget):
+    directlyProvides(widget_class, ISequenceWidgetFactory)

Modified: Zope3/branches/philikon-widget-subdirective/src/zope/app/form/interfaces.py
===================================================================
--- Zope3/branches/philikon-widget-subdirective/src/zope/app/form/interfaces.py	2005-06-12 14:06:03 UTC (rev 30759)
+++ Zope3/branches/philikon-widget-subdirective/src/zope/app/form/interfaces.py	2005-06-12 14:12:10 UTC (rev 30760)
@@ -18,7 +18,7 @@
 __docformat__ = 'restructuredtext'
 
 from zope.schema.interfaces import ValidationError
-from zope.component.interfaces import IView
+from zope.component.interfaces import IView, IViewFactory
 from zope.interface import Attribute, Interface, implements
 from zope.schema import Bool
 from zope.app.exception.interfaces import UserError
@@ -154,6 +154,28 @@
         used for the form key.
         """
 
+class IWidgetFactory(IViewFactory):
+    """Create a widget."""
+
+class ISequenceWidgetFactory(IWidgetFactory):
+    """Create a sequence widget.
+
+    A widget factory should provide this interface to indicate that
+    its call signature is different from other widget factories."""
+
+    def __call__(context, field, request):
+        """Creates a sequence widget with ``field`` being the list element
+        field type."""
+
+class IVocabularyWidgetFactory(IWidgetFactory):
+    """Create a vocabulary widget.
+
+    A widget factory should provide this interface to indicate that
+    its call signature is different from other widget factories."""
+
+    def __call__(field, vocabulary, request):
+        """Creates a vocabulary widget."""
+
 class IInputWidget(IWidget):
     """A widget for editing a field value."""