[Checkins] SVN: z3c.form/trunk/ - Feature: Allow "no value message" of select widgets to be dynamilcally

[Stephan Richter]

Log message for revision 77192:
  - Feature: Allow "no value message" of select widgets to be dynamilcally
    changed using an attribute value adapter.
  
  

Changed:
  U   z3c.form/trunk/CHANGES.txt
  U   z3c.form/trunk/src/z3c/form/browser/select.py
  U   z3c.form/trunk/src/z3c/form/browser/select.txt
  U   z3c.form/trunk/src/z3c/form/widget.py

-=-
Modified: z3c.form/trunk/CHANGES.txt
===================================================================
--- z3c.form/trunk/CHANGES.txt	2007-06-28 20:43:10 UTC (rev 77191)
+++ z3c.form/trunk/CHANGES.txt	2007-06-28 21:02:33 UTC (rev 77192)
@@ -5,6 +5,9 @@
 Version 1.4.0 (??/??/2007)
 -------------------------
 
+- Feature: Allow "no value message" of select widgets to be dynamilcally
+  changed using an attribute value adapter.
+
 - Feature: Internationalized data conversion for date, time, date/time,
   integer, float and decimal. Now the locale data is used to format and parse
   those data types to provide the bridge to text-based widgets. While those
@@ -17,7 +20,11 @@
   of fields/widgets into a logical unit. They were designed with ease of use
   in mind.
 
+- Feature: Button Actions -- in other words, the widget for the button field
+  -- can now be specified either as the "actionFactory" on the button field or
+  as an adapter.
 
+
 Version 1.3.0 (6/22/2007)
 -------------------------
 

Modified: z3c.form/trunk/src/z3c/form/browser/select.py
===================================================================
--- z3c.form/trunk/src/z3c/form/browser/select.py	2007-06-28 20:43:10 UTC (rev 77191)
+++ z3c.form/trunk/src/z3c/form/browser/select.py	2007-06-28 21:02:33 UTC (rev 77192)
@@ -38,6 +38,10 @@
 
     noValueMessage = _('no value')
 
+    # Internal attributes
+    _adapterValueAttributes = widget.SequenceWidget._adapterValueAttributes + \
+        ('noValueMessage',)
+
     def isSelected(self, term):
         return term.token in self.value
 

Modified: z3c.form/trunk/src/z3c/form/browser/select.txt
===================================================================
--- z3c.form/trunk/src/z3c/form/browser/select.txt	2007-06-28 20:43:10 UTC (rev 77191)
+++ z3c.form/trunk/src/z3c/form/browser/select.txt	2007-06-28 21:02:33 UTC (rev 77192)
@@ -128,3 +128,25 @@
   >>> widget.update()
   >>> widget.extract(default=1)
   1
+
+Additionally to the standard dynamic attribute values, the select widget also
+allows dynamic values for the "no value message". Initially, we have the
+default message:
+
+  >>> widget.noValueMessage
+  u'no value'
+
+Let's now register an attribute value:
+
+  >>> from z3c.form.widget import StaticWidgetAttribute
+  >>> NoValueMessage = StaticWidgetAttribute(u'- nothing -')
+
+  >>> import zope.component
+  >>> zope.component.provideAdapter(NoValueMessage, name='noValueMessage')
+
+After updating the widget, the no value message changed to the value provided
+by the adapter:
+
+  >>> widget.update()
+  >>> widget.noValueMessage
+  u'- nothing -'

Modified: z3c.form/trunk/src/z3c/form/widget.py
===================================================================
--- z3c.form/trunk/src/z3c/form/widget.py	2007-06-28 20:43:10 UTC (rev 77191)
+++ z3c.form/trunk/src/z3c/form/widget.py	2007-06-28 21:02:33 UTC (rev 77192)
@@ -67,6 +67,9 @@
     form = None
     field = None
 
+    # Internal attributes
+    _adapterValueAttributes = ('label', 'name')
+
     def __init__(self, request):
         self.request = request
 
@@ -117,7 +120,7 @@
             converter = interfaces.IDataConverter(self)
             self.value = converter.toWidgetValue(value)
         # Step 2: Update selected attributes
-        for attrName in ('label', 'required'):
+        for attrName in self._adapterValueAttributes:
             value = zope.component.queryMultiAdapter(
                 (self.context, self.request, self.form, self.field, self),
                 interfaces.IValue, name=attrName)