--- a/src/cagou/core/cagou_main.py	Sun Aug 28 15:27:45 2016 +0200
+++ b/src/cagou/core/cagou_main.py	Sun Aug 28 15:27:48 2016 +0200
@@ -24,6 +24,7 @@
 from constants import Const as C
 from sat.core import log as logging
 log = logging.getLogger(__name__)
+from sat.core import exceptions
 from sat_frontends.quick_frontend.quick_app import QuickApp
 from sat_frontends.quick_frontend import quick_widgets
 from sat_frontends.bridge.DBus import DBusBridgeFrontend
@@ -43,6 +44,7 @@
 from kivy.uix.screenmanager import ScreenManager, Screen, FallOutTransition, RiseInTransition
 from kivy.uix.dropdown import DropDown
 from cagou_widget import CagouWidget
+from . import widgets_handler
 from .common import IconButton
 from importlib import import_module
 import os.path
@@ -205,6 +207,13 @@
         self.app.default_avatar = os.path.join(self.media_dir, "misc/default_avatar.png")
         self._plg_wids = []  # widget plugins
         self._import_plugins()
+        self._visible_widgets = {}  # visible widgets by classes
+
+    @property
+    def visible_widgets(self):
+        for w_list in self._visible_widgets.itervalues():
+            for w in w_list:
+                yield w
 
     def run(self):
         self.app.run()
@@ -306,6 +315,16 @@
 
     ## widgets handling
 
+    def getParentHandler(self, widget):
+        """Return handler holding this widget
+
+        @return (WidgetsHandler): handler
+        """
+        w_handler = widget.parent
+        while w_handler and not(isinstance(w_handler, widgets_handler.WidgetsHandler)):
+            w_handler = w_handler.parent
+        return w_handler
+
     def switchWidget(self, old, new):
         """Replace old widget by new one
 
@@ -322,14 +341,49 @@
                     break
 
         if to_change is None:
-            log.error(u"no CagouWidget found when trying to switch widget")
-        else:
-            parent = to_change.parent
-            idx = parent.children.index(to_change)
-            parent.remove_widget(to_change)
-            if isinstance(to_change, quick_widgets.QuickWidget):
-                self.widgets.deleteWidget(to_change)
-            parent.add_widget(new, index=idx)
+            raise exceptions.InternalError(u"no CagouWidget found when trying to switch widget")
+        handler = self.getParentHandler(to_change)
+        handler.changeWidget(new)
+
+    def addVisibleWidget(self, widget):
+        """declare a widget visible
+
+        for internal use only!
+        """
+        assert isinstance(widget, quick_widgets.QuickWidget)
+        log.info(u"addVisibleWidget: {}".format(', '.join([unicode(t) for t in widget.targets])))
+        self._visible_widgets.setdefault(widget.__class__, []).append(widget)
+
+    def removeVisibleWidget(self, widget):
+        """declare a widget not visible anymore
+
+        for internal use only!
+        """
+        log.info(u"removeVisibleWidget: {}".format(', '.join([unicode(t) for t in widget.targets])))
+        self._visible_widgets[widget.__class__].remove(widget)
+        log.info("remove: " + unicode(widget.targets))
+        self.widgets.deleteWidget(widget)
+
+    def getVisibleList(self, cls):
+        """get list of visible widgets for a given class
+
+        @param cls(QuickWidget class): type of widgets to get
+        @return (list[QuickWidget class]): visible widgets of this class
+        """
+        try:
+            return self._visible_widgets[cls]
+        except KeyError:
+            return []
+
+    def getOrClone(self, widget):
+        """Get a QuickWidget if it has not parent set else clone it"""
+        if widget.parent is None:
+            return widget
+        targets = list(widget.targets)
+        w = self.widgets.getOrCreateWidget(widget.__class__, targets[0], on_new_widget=None, on_existing_widget=C.WIDGET_RECREATE, profiles=widget.profiles)
+        for t in targets[1:]:
+            w.addTarget(t)
+        return w
 
     ## misc ##