From 84247a0bc63179309693a52ac2aad989fb546d8c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Torsten=20Irl=C3=A4nder?= <torsten.irlaender@googlemail.com>
Date: Fri, 30 Jun 2017 15:37:25 +0200
Subject: [PATCH 1/3] Added FormdDataprovider class.

FormDataprovider is a class which can be used to build instances whic provide
data to the form. They are used as `item` on form initialisation.
---
 formbar/form.py | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/formbar/form.py b/formbar/form.py
index 41c5afc..0dbf6d6 100644
--- a/formbar/form.py
+++ b/formbar/form.py
@@ -74,6 +74,42 @@ class ValidationException(Exception):
     pass
 
 
+class FormDataprovider(object):
+    """Dummy class which can be used to provided dynamic data to the
+    form. It can be provided as item on the form init to provide
+    dynamically loaded options and values.
+
+    As said the dataprovider can be user to provide `options` and `values`.
+    Both are provided by defining propertys.
+
+    1. Value
+    The function should simply return the pythonic value of the field:
+
+        @property
+        def foo(self):
+            return "1"
+
+    1. Options
+    The function should return a list of tuples. The first value of the
+    tuple is the displayed label and the second value is the value of
+    the option:
+
+        @property
+        def foo_options(self):
+            return [("Foo", "1"), ("Bar", "2")]
+
+    or you can use the helper method `get_options(fieldname)`
+    """
+
+    def __init__(self, ctx):
+        self.ctx = ctx
+        """Can be anything. E.g db connection, request. It depends on the context."""
+
+    def get_options(self, name):
+        if hasattr(self, name+"_options"):
+            return getattr(self, name+"_options")
+        return []
+
 class Validator(object):
     """Validator class for external validators. External validators can
     be used to implement more complicated validations on the converted

From 58c71c79a0405cf52eed22dfae28279a22ddf471 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Torsten=20Irl=C3=A4nder?= <torsten.irlaender@googlemail.com>
Date: Fri, 30 Jun 2017 15:38:56 +0200
Subject: [PATCH 2/3] Load options from FormDataprovider in Selectionfields if
 possible.

---
 formbar/fields.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/formbar/fields.py b/formbar/fields.py
index 26bf8bc..54490f3 100644
--- a/formbar/fields.py
+++ b/formbar/fields.py
@@ -738,6 +738,9 @@ def get_options(self):
         elif isinstance(user_defined_options, str):
             for option in self._form.merged_data.get(user_defined_options):
                 options.append((option[0], option[1], True))
+        elif self._form._item and hasattr(self._form._item, "get_options"):
+            for option in self._form._item.get_options(self.name):
+                options.append((option[0], option[1], True))
         return self.sort_options(options)
 
     def _from_python(self, value):

From f69ba7f46e12adbccd294645cfdf1145ba2d03cf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Torsten=20Irl=C3=A4nder?= <torsten.irlaender@googlemail.com>
Date: Fri, 30 Jun 2017 15:41:08 +0200
Subject: [PATCH 3/3] Added Formdataprovider into Changes.

---
 CHANGES.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CHANGES.txt b/CHANGES.txt
index 478ce59..d09df20 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -2,6 +2,8 @@
 =====
 - Added "selected" config attribute to the radio renderer to preselect an entry from
   the option by its index.
+- Added FormDataprovider. A Formdataprovider can be used to fill the form with
+  (dynamic) values and options.
 
 1.0.2
 =====