--- a/src/browser/public/libervia.css	Mon Nov 30 16:26:31 2015 +0100
+++ b/src/browser/public/libervia.css	Mon Nov 30 21:52:41 2015 +0100
@@ -541,6 +541,15 @@
     background-color: rgb(175, 175, 175);
 }
 
+.gwt-ScrollPanel {
+    padding-right: 15px; /* avoid systematic horizontal scroll when only the vertical one is needed */
+}
+
+.xmlui-JidsListWidget {
+    padding-right: 20px; /* avoid systematic horizontal scroll when only the vertical one is needed */
+    height: 300px;
+}
+
 /* Contacts in MUC */
 
 .muc_contact {

--- a/src/browser/sat_browser/chat.py	Mon Nov 30 16:26:31 2015 +0100
+++ b/src/browser/sat_browser/chat.py	Mon Nov 30 21:52:41 2015 +0100
@@ -35,6 +35,7 @@
 from pyjamas.ui.KeyboardListener import KEY_ENTER, KeyboardHandler
 from pyjamas.ui.HTMLPanel import HTMLPanel
 from pyjamas import DOM
+from pyjamas import Window
 
 from datetime import datetime
 from time import time
@@ -107,7 +108,8 @@
             self.host.addListener('presence', self.presenceListener, [C.PROF_KEY_NONE])
             self.avatarListener = self.onAvatarUpdate
             host.addListener('avatar', self.avatarListener, [C.PROF_KEY_NONE])
-
+            Window.addWindowResizeListener(self)
+        
         self._body.add(chat_area)
         self.content = AbsolutePanel()
         self.content.setStyleName('chatContent')
@@ -128,6 +130,10 @@
         if type_ == C.CHAT_ONE2ONE:
             self.historyPrint(profile=self.profile)
 
+    def onWindowResized(self, width=None, height=None):
+        ideal_height = self.content_scroll.getOffsetHeight()
+        self.occupants_panel.setHeight("%s%s" % (ideal_height, "px"))
+
     @property
     def target(self):
         # FIXME: for unknow reason, pyjamas doesn't use the method inherited from QuickChat
@@ -285,6 +291,8 @@
         if 'chat_state' in states.keys():  # start/stop sending "composing" state from now
             self.chat_state_machine.started = not not states['chat_state']
 
+        self.onWindowResized()  # be sure to set the good height
+
     def addGamePanel(self, widget):
         """Insert a game panel to this Chat dialog.
 

--- a/src/browser/sat_browser/contact_list.py	Mon Nov 30 16:26:31 2015 +0100
+++ b/src/browser/sat_browser/contact_list.py	Mon Nov 30 21:52:41 2015 +0100
@@ -123,6 +123,7 @@
         SimplePanel.__init__(self)
         self.host = host
         self.scroll_panel = ScrollPanel()
+        self.scroll_panel.addStyleName("gwt-ScrollPanel")  # XXX: no class is set by Pyjamas
         self.vPanel = VerticalPanel()
         _title = ContactTitleLabel(host, 'Contacts')
         DOM.setStyleAttribute(_title.getElement(), "cursor", "pointer")
@@ -132,7 +133,6 @@
             self.removeAlerts(contact_jid, True)
 
         self._contacts_panel = contact_panel.ContactsPanel(host, contacts_click=on_click, contacts_menus=(C.MENU_JID_CONTEXT, C.MENU_ROSTER_JID_CONTEXT))
-        self._contacts_panel.setStyleName('contactPanel') # FIXME: style doesn't exists !
         self._group_panel = GroupPanel(self)
 
         self.vPanel.add(_title)

--- a/src/browser/sat_browser/contact_panel.py	Mon Nov 30 16:26:31 2015 +0100
+++ b/src/browser/sat_browser/contact_panel.py	Mon Nov 30 21:52:41 2015 +0100
@@ -24,13 +24,14 @@
 log = getLogger(__name__)
 from sat_frontends.tools import jid
 
+from pyjamas.ui.ScrollPanel import ScrollPanel
 from pyjamas.ui.VerticalPanel import VerticalPanel
 
 import contact_widget
 from constants import Const as C
 
 
-class ContactsPanel(VerticalPanel):
+class ContactsPanel(ScrollPanel):
     """ContactList graphic representation
 
     Special features like popup menu panel or changing the contact states must be done in a sub-class.
@@ -51,14 +52,17 @@
         @param contacts_display (tuple): prioritize the display methods of the
             contact's label with values in ("jid", "nick", "bare", "resource")
         """
-        VerticalPanel.__init__(self)
+        self.panel = VerticalPanel()
+        ScrollPanel.__init__(self, self.panel)
+        self.addStyleName("gwt-ScrollPanel")  # XXX: no class is set by Pyjamas
+
         self.host = host
         self.merge_resources = merge_resources
         self._contacts = {}  # entity jid to ContactBox map
-        self.click_listener = None
+        self.panel.click_listener = None
 
         if contacts_click is not None:
-            self.onClick = contacts_click
+            self.panel.onClick = contacts_click
 
         self.contacts_style = contacts_style
         self.contacts_menus = contacts_menus
@@ -83,7 +87,7 @@
     def clear(self):
         """Clear all contacts."""
         self._contacts.clear()
-        VerticalPanel.clear(self)
+        VerticalPanel.clear(self.panel)
 
     def setList(self, jids):
         """set all contacts in the list in one shot.
@@ -91,7 +95,7 @@
         @param jids (list[jid.JID]): jids to display (the order is kept)
         @param name (unicode): optional name of the contact
         """
-        current_jids = [box.jid for box in self.children if isinstance(box, contact_widget.ContactBox)]
+        current_jids = [box.jid for box in self.panel.children if isinstance(box, contact_widget.ContactBox)]
         if current_jids == jids:
             # the display doesn't change
             return
@@ -132,9 +136,9 @@
                                             plugin_menu_context=self.contacts_menus)
             self._contacts[self._key(contact_jid)] = box
             if index:
-                VerticalPanel.insert(self, box, index)
+                VerticalPanel.insert(self.panel, box, index)
             else:
-                VerticalPanel.append(self, box)
+                VerticalPanel.append(self.panel, box)
         return box
 
     def removeContactBox(self, contact_jid):
@@ -144,4 +148,4 @@
         """
         box = self._contacts.pop(self._key(contact_jid), None)
         if box:
-            VerticalPanel.remove(self, box)
+            VerticalPanel.remove(self.panel, box)

--- a/src/browser/sat_browser/main_panel.py	Mon Nov 30 16:26:31 2015 +0100
+++ b/src/browser/sat_browser/main_panel.py	Mon Nov 30 21:52:41 2015 +0100
@@ -294,8 +294,5 @@
             self._contacts.removeFromParent()
         parent.insert(self._contacts, 0)
 
-    def refresh(self):
-        """Refresh the main panel"""
-        self.host.contact_panel.refresh()
 
 

--- a/src/browser/sat_browser/xmlui.py	Mon Nov 30 16:26:31 2015 +0100
+++ b/src/browser/sat_browser/xmlui.py	Mon Nov 30 21:52:41 2015 +0100
@@ -234,6 +234,7 @@
 
     def __init__(self, xmlui_main, xmlui_parent, jids, styles):
         contact_panel.ContactsPanel.__init__(self, xmlui_main.host, merge_resources=False)
+        self.addStyleName("xmlui-JidsListWidget")
         self.setList([jid.JID(jid_) for jid_ in jids])
 
     def _xmluiGetSelectedValues(self):