diff --git a/CHANGELOG b/CHANGELOG
index fc9de65037..91d3adb60b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,4 @@
+* Add PYSON Widget
 * Show records names in wizard title
 * Add support for datetime_field to Reference
 * Show non editable widget as insensitive
diff --git a/tryton/gui/window/view_form/view/form.py b/tryton/gui/window/view_form/view/form.py
index 90ca2edf8f..fea8907c26 100644
--- a/tryton/gui/window/view_form/view/form.py
+++ b/tryton/gui/window/view_form/view/form.py
@@ -31,6 +31,7 @@ from .form_gtk.one2one import One2One
 from .form_gtk.richtextbox import RichTextBox
 from .form_gtk.dictionary import DictWidget
 from .form_gtk.multiselection import MultiSelection
+from .form_gtk.pyson import PYSON
 from .form_gtk.state_widget import (Label, VBox, Image, Frame, ScrolledWindow,
     Notebook, Alignment)
 
@@ -377,6 +378,7 @@ class ViewForm(View):
         'richtext': RichTextBox,
         'dict': DictWidget,
         'multiselection': MultiSelection,
+        'pyson': PYSON,
         }
 
     @classmethod
diff --git a/tryton/gui/window/view_form/view/form_gtk/char.py b/tryton/gui/window/view_form/view/form_gtk/char.py
index abfd97bfa8..23bb6e8224 100644
--- a/tryton/gui/window/view_form/view/form_gtk/char.py
+++ b/tryton/gui/window/view_form/view/form_gtk/char.py
@@ -82,9 +82,8 @@ class Char(Widget, TranslateMixin, PopdownMixin):
     @property
     def modified(self):
         if self.record and self.field:
-            entry = self.entry.get_child() if self.autocomplete else self.entry
-            value = entry.get_text() or ''
-            return self.field.get_client(self.record) != value
+            value = self.get_client_value(self.record, self.field)
+            return value != self.get_value()
         return False
 
     def set_value(self, record, field):
@@ -96,6 +95,13 @@ class Char(Widget, TranslateMixin, PopdownMixin):
         entry = self.entry.get_child() if self.autocomplete else self.entry
         return entry.get_text()
 
+    def get_client_value(self, record, field):
+        if not field:
+            value = ''
+        else:
+            value = field.get_client(record)
+        return value
+
     def display(self, record, field):
         super(Char, self).display(record, field)
         if self.autocomplete:
@@ -118,11 +124,7 @@ class Char(Widget, TranslateMixin, PopdownMixin):
             size_entry.set_width_chars(-1)
             size_entry.set_max_length(0)
 
-        if not field:
-            value = ''
-        else:
-            value = field.get_client(record)
-
+        value = self.get_client_value(record, field)
         if not self.autocomplete:
             self.entry.set_text(value)
             reset_position(self.entry)
diff --git a/tryton/gui/window/view_form/view/form_gtk/integer.py b/tryton/gui/window/view_form/view/form_gtk/integer.py
index fd8e80ef93..3c7b641e28 100644
--- a/tryton/gui/window/view_form/view/form_gtk/integer.py
+++ b/tryton/gui/window/view_form/view/form_gtk/integer.py
@@ -3,8 +3,6 @@
 from .char import Char
 import locale
 
-from tryton.common.entry_position import reset_position
-
 
 class Integer(Char):
     "Integer"
@@ -21,26 +19,16 @@ class Integer(Char):
         self.entry.connect('insert_text', self.sig_insert_text)
         self.factor = float(attrs.get('factor', 1))
 
-    @property
-    def modified(self):
-        if self.record and self.field:
-            entry = self.entry.get_child() if self.autocomplete else self.entry
-            value = entry.get_text() or ''
-            return self.field.get_client(self.record, self.factor) != value
-        return False
-
     def set_value(self, record, field):
         return field.set_client(record, self.entry.get_text(),
             factor=self.factor)
 
-    def display(self, record, field):
-        # skip Char call because set_text doesn't work with int
-        super(Char, self).display(record, field)
+    def get_client_value(self, record, field):
         if not field:
-            self.entry.set_text('')
-            return False
-        self.entry.set_text(field.get_client(record, factor=self.factor))
-        reset_position(self.entry)
+            value = ''
+        else:
+            value = field.get_client(record, factor=self.factor)
+        return value
 
     def sig_insert_text(self, entry, new_text, new_text_length, position):
         value = entry.get_text()
diff --git a/tryton/gui/window/view_form/view/form_gtk/pyson.py b/tryton/gui/window/view_form/view/form_gtk/pyson.py
new file mode 100644
index 0000000000..5700e75e7b
--- /dev/null
+++ b/tryton/gui/window/view_form/view/form_gtk/pyson.py
@@ -0,0 +1,42 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+import gtk
+from .char import Char
+from tryton.pyson import CONTEXT, PYSONEncoder, PYSONDecoder
+
+
+class PYSON(Char):
+
+    def __init__(self, view, attrs):
+        super(PYSON, self).__init__(view, attrs)
+        self.encoder = PYSONEncoder()
+        self.decoder = PYSONDecoder(noeval=True)
+        self.entry.connect('key-release-event', self.validate_pyson)
+
+    def get_encoded_value(self):
+        value = self.get_value()
+        if not value:
+            return value
+        try:
+            return self.encoder.encode(eval(value, CONTEXT))
+        except (ValueError, TypeError, NameError, SyntaxError):
+            return None
+
+    def set_value(self, record, field):
+        field.set_client(record, self.get_encoded_value())
+
+    def get_client_value(self, record, field):
+        value = super(PYSON, self).get_client_value(record, field)
+        if value:
+            value = repr(self.decoder.decode(value))
+        return value
+
+    def validate_pyson(self, *args):
+        icon = gtk.STOCK_OK
+        if self.get_encoded_value() is None:
+            icon = gtk.STOCK_CANCEL
+        self.entry.set_icon_from_stock(gtk.ENTRY_ICON_SECONDARY, icon)
+
+    def _focus_out(self):
+        self.validate_pyson()
+        super(PYSON, self)._focus_out()