more on schemas and fields: make it usable for interface-driven form generation; + minor bug fixes

git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@1998 fd906abe-77d9-0310-91a1-e0d9ade77398

browser/README.txt

@@ -220,12 +220,15 @@ Real work can only be done by an adapter to GenericView that provides the
 IFormController interface with its update(). There also must be a
 form variable (typically coming from a hidden field) with the name
 'form.action' that provides the name under which the form controller is
-registered.
+registered. The ``update()`` method should return a boolean that indicates
+if the view should be rendered or not; return ``False`` e.g. if the form
+controller issues a redirect.
 
   >>> from cybertools.browser.form import IFormController, FormController
   >>> class MyController(FormController):
   ...     def update(self):
   ...         print 'updating...'
+  ...         return True
 
   >>> component.provideAdapter(MyController, (View, IBrowserRequest),
   ...                          IFormController, name='save')

composer/schema/field.py

@@ -39,6 +39,7 @@ class Field(Component):
 
     required = False
     standardFieldName = None
+    renderFactory = None
 
     def __init__(self, name, title=None, fieldType='textline', **kw):
         assert name

composer/schema/instance.py

@@ -24,17 +24,48 @@ $Id$
 
 from BTrees.OOBTree import OOBTree
 from zope.component import adapts
-from zope.interface import implements
+from zope.interface import implements, Interface
 
-from cybertools.composer.instance import Instance
+from cybertools.composer.instance import Instance as BaseInstance
 from cybertools.composer.interfaces import IInstance
 from cybertools.composer.schema.interfaces import IClient
 from cybertools.composer.schema.schema import FormState
 
 
-class Editor(Instance):
+class Instance(BaseInstance):
+
+    implements(IInstance)
+    adapts(Interface)
 
     aspect = 'schema.editor.default'
+    template = None
+
+    def applyTemplate(self, *args, **kw):
+        #result = dict(__name__=self.context.__name__)
+        result = {}
+        mode = kw.get('mode', 'view')
+        template = self.template
+        if template is not None:
+            for f in template.components:
+                fieldType = f.getFieldTypeInfo()
+                if not fieldType.storeData:
+                    # a dummy field, e.g. a spacer
+                    continue
+                fi = f.getFieldInstance()
+                name = f.name
+                value = getattr(self.context, name, u'')
+                value = (mode == 'view' and fi.display(value)) or fi.marshall(value)
+                result[name] = value
+        return result
+
+
+class Editor(BaseInstance):
+
+    implements(IInstance)
+    adapts(Interface)
+
+    aspect = 'schema.editor.default'
+    template = None
 
     def applyTemplate(self, data={}, *args, **kw):
         for c in self.template.components:

composer/schema/interfaces.py

@@ -78,6 +78,7 @@ fieldTypes = SimpleVocabulary((
               instanceName='number'),
     #FieldType('date', 'date', u'Date'),
     #FieldType('checkbox', 'checkbox', u'Checkbox'),
+    FieldType('dropdown', 'dropdown', u'Drop-down selection'),
     FieldType('spacer', 'spacer', u'Spacer', fieldMacro='field_spacer',
               storeData=False),
 ))
@@ -139,6 +140,12 @@ class IField(IComponent):
                 default=3,
                 required=False,)
 
+    renderFactory = Attribute('A class or another factory providing an '
+                        'object used for rendering the data e.g. as a '
+                        'cell on a tabular report. See cybertools.reporter. '
+                        'May become replaced with a more intelligent kind of '
+                        'field instance.')
+
 
 class IFieldInstance(Interface):
     """ An adapter for checking and converting data values coming

composer/schema/util.py

@@ -28,13 +28,14 @@ from cybertools.composer.schema.field import Field
 
 
 fieldMapping = {
-        schema.TextLine: ('text',),
+        schema.TextLine: ('textline',),
-        schema.ASCII: ('text',),
+        schema.ASCII: ('textline',),
         schema.Text: ('textarea',),
         schema.Date: ('date',),
         schema.Int: ('number',),
         schema.Bool: ('checkbox',),
         schema.Choice: ('dropdown',),
+        schema.Bytes: ('fileupload',),
 }
 
 
@@ -44,12 +45,7 @@ def getSchemaFromInterface(ifc, manager):
         field = ifc[fname]
         if field.__class__ in fieldMapping:
             info = fieldMapping[field.__class__]
-            voc = getattr(field, 'vocabulary', ()) or getattr(field, 'vocabularyName', ())
+            voc = getattr(field, 'vocabulary', ()) or getattr(field, 'vocabularyName', None)
-            if voc:
-                if isinstance(voc, str):
-                    voc = vocabularies[voc]
-                else:
-                    voc = [(t.token, t.title or t.token) for t in voc]
             f = Field(field.getName(),
                     fieldType = info[0],
                     required=field.required,