--- a/src/pyams_thesaurus/widget/__init__.py	Mon Jul 09 13:43:31 2018 +0200
+++ b/src/pyams_thesaurus/widget/__init__.py	Tue Jul 10 15:46:24 2018 +0200
@@ -172,6 +172,32 @@
     return FieldWidget(field, ThesaurusTermsListWidget(request))
 
 
+@widgettemplate_config(mode='input', template='templates/terms-tree-input.pt', layer=IFormLayer)
+class ThesaurusTermsTreeWidget(ThesaurusTermsListWidget):
+    """Thesaurus terms tree widget"""
+
+    @property
+    def top_terms(self):
+        thesaurus = query_utility(IThesaurus, name=self.thesaurus_name)
+        if thesaurus is not None:
+            return sorted(thesaurus.get_top_terms(extract=self.extract_name),
+                          key=lambda x: x.label)
+        else:
+            return ()
+
+    def get_subterms(self, term):
+        for subterm in term.specifics:
+            if (not self.extract_name) or (self.extract_name in subterm.extracts):
+                yield subterm
+                for another in self.get_subterms(subterm):
+                    yield another
+
+
+def ThesaurusTermsTreeFieldWidget(field, request):
+    """Thesaurus terms tree field widget factory"""
+    return FieldWidget(field, ThesaurusTermsTreeWidget(request))
+
+
 #
 # Terms list widget with selector
 #

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pyams_thesaurus/widget/templates/terms-tree-input.pt	Tue Jul 10 15:46:24 2018 +0200
@@ -0,0 +1,32 @@
+<tal:loop repeat="term view/top_terms">
+	<div class="col col-xs-6 col-sm-4 col-md-4 col-lg-3">
+		<div class="ams-widget" data-ams-widget-toggle-button="false"
+			 tal:define="index python:repeat['term'].index()"
+			 tal:attributes="id string:them_${index}">
+			<header class="no-margin">
+				<h2 tal:content="term/label"></h2>
+			</header>
+			<div class="widget-body no-padding viewport-y viewport-200 viewport-x-none"
+				 style="height: 200px; width: calc(100% - 2px);">
+				<tal:loop repeat="subterm python:view.get_subterms(term)">
+					<div tal:define="padding python:(subterm.level - 1) * 20"
+						 tal:attributes="style string:padding-left: ${padding}px;; line-height: 1em;;">
+						<label class="checkbox"
+							   tal:define="published python:subterm.status == 'published'"
+							   tal:omit-tag="not:published">
+							<input type="checkbox" name="form.widgets.themes:list"
+								   tal:condition="published"
+								   tal:attributes="id string:term_${subterm/label};
+												   name string:${view/name}:list;
+												   value subterm/label;
+												   checked python:subterm.label in view.value" />
+							<i></i>
+							<div tal:attributes="class python:'' if published else 'bold margin-top-5'"
+								 tal:content="subterm/label"></div>
+						</label>
+					</div>
+				</tal:loop>
+			</div>
+		</div>
+	</div>
+</tal:loop>