Add Dict widget to tree view

It is needed to be able to search on dict.

issue8296
review271331012

CHANGELOG

@@ -1,3 +1,4 @@
+* Add Dict widget for tree view
 * Add handle to reordable line of tree views
 
 Version 5.2.0 - 2019-05-06

tryton/gui/window/view_form/view/list.py

@@ -21,7 +21,7 @@ from . import View, XMLViewParser
 from .list_gtk.editabletree import EditableTreeView, TreeView
 from .list_gtk.widget import (Affix, Char, Text, Int, Boolean, URL, Date,
     Time, Float, TimeDelta, Binary, M2O, O2O, O2M, M2M, Selection, Reference,
-    ProgressBar, Button, Image)
+    Dict, ProgressBar, Button, Image)
 
 _ = gettext.gettext
 
@@ -258,6 +258,7 @@ class TreeXMLViewParser(XMLViewParser):
         'callto': URL,
         'char': Char,
         'date': Date,
+        'dict': Dict,
         'email': URL,
         'float': Float,
         'image': Image,

tryton/gui/window/view_form/view/list_gtk/widget.py

@@ -1053,6 +1053,21 @@ class _ReferenceSelection(Selection):
         return False
 
 
+class Dict(GenericText):
+    align = 0.5
+
+    def __init__(self, view, attrs):
+        super().__init__(view, attrs)
+        self.renderer.props.editable = False
+
+    def setter(self, column, cell, store, iter_, user_data=None):
+        super().setter(column, cell, store, iter_, user_data=None)
+        cell.props.editable = False
+
+    def get_textual_value(self, record):
+        return '(%s)' % len(record[self.attrs['name']].get_client(record))
+
+
 class ProgressBar(Cell):
     align = 0.5
     orientations = {