diff --git a/sao/src/view/form.js b/sao/src/view/form.js
index abeb01e2b1..97c64efb75 100644
--- a/sao/src/view/form.js
+++ b/sao/src/view/form.js
@@ -4534,18 +4534,7 @@ function eval_pyson(value){
         },
         set_url: function(value) {
             this.button.attr('href', value);
-        },
-        set_readonly: function(readonly) {
-            Sao.View.Form.URL._super.set_readonly.call(this, readonly);
-            if (readonly) {
-                this.input.hide();
-                this.button.removeClass('btn-default');
-                this.button.addClass('btn-link');
-            } else {
-                this.input.show();
-                this.button.removeClass('btn-link');
-                this.button.addClass('btn-default');
-            }
+            this.button.prop('disabled', !value);
         },
         set_invisible: function(invisible) {
             Sao.View.Form.URL._super.set_invisible.call(this, invisible);
diff --git a/sao/src/view/tree.js b/sao/src/view/tree.js
index 1392236d6c..07b4f29f3d 100644
--- a/sao/src/view/tree.js
+++ b/sao/src/view/tree.js
@@ -3100,6 +3100,18 @@
         }
     });
 
+    Sao.View.EditableTree.URL = Sao.class_(Sao.View.EditableTree.Char, {
+        class_: 'editable-url',
+        set_readonly: function(readonly) {
+            Sao.View.EditableTree.URL._super.set_readonly.call(this, readonly);
+            if (readonly) {
+                this.input.hide();
+            } else {
+                this.input.show();
+            }
+        },
+    });
+
     Sao.View.EditableTree.Date = Sao.class_(Sao.View.Form.Date, {
         class_: 'editabletree-date',
         init: function(view, attributes) {
@@ -3232,10 +3244,10 @@
     Sao.View.EditableTree.WIDGETS = {
         'binary': Sao.View.EditableTree.Binary,
         'boolean': Sao.View.EditableTree.Boolean,
-        'callto': Sao.View.EditableTree.Char,
+        'callto': Sao.View.EditableTree.URL,
         'char': Sao.View.EditableTree.Char,
         'date': Sao.View.EditableTree.Date,
-        'email': Sao.View.EditableTree.Char,
+        'email': Sao.View.EditableTree.URL,
         'float': Sao.View.EditableTree.Float,
         'integer': Sao.View.EditableTree.Integer,
         'many2many': Sao.View.EditableTree.Many2Many,
@@ -3245,11 +3257,11 @@
         'one2one': Sao.View.EditableTree.One2One,
         'reference': Sao.View.EditableTree.Reference,
         'selection': Sao.View.EditableTree.Selection,
-        'sip': Sao.View.EditableTree.Char,
+        'sip': Sao.View.EditableTree.URL,
         'text': Sao.View.EditableTree.Char,
         'time': Sao.View.EditableTree.Time,
         'timedelta': Sao.View.EditableTree.TimeDelta,
-        'url': Sao.View.EditableTree.Char,
+        'url': Sao.View.EditableTree.URL,
     };
 
 }());
diff --git a/tryton/tryton/gui/window/view_form/view/form_gtk/url.py b/tryton/tryton/gui/window/view_form/view/form_gtk/url.py
index cd0f786b97..aa40e3c154 100644
--- a/tryton/tryton/gui/window/view_form/view/form_gtk/url.py
+++ b/tryton/tryton/gui/window/view_form/view/form_gtk/url.py
@@ -45,6 +45,7 @@ class URL(Char):
                 value = icon
             self.button.set_image(common.IconFactory.get_image(
                     value, Gtk.IconSize.SMALL_TOOLBAR))
+        self.button.set_sensitive(bool(self.entry.get_text()))
 
     def set_tooltips(self):
         value = self.entry.get_text()
@@ -55,14 +56,6 @@ class URL(Char):
             self.tooltips.set_tip(self.button, '')
             self.tooltips.disable()
 
-    def _readonly_set(self, value):
-        super(URL, self)._readonly_set(value)
-        if value:
-            self.entry.hide()
-        else:
-            self.entry.show()
-        self.button.set_sensitive(True)
-
     def button_clicked(self, widget):
         value = self.entry.get_text()
         if value: