--- a/libervia/desktop_kivy/plugins/plugin_wid_calls.py	Wed Nov 01 13:41:07 2023 +0100
+++ b/libervia/desktop_kivy/plugins/plugin_wid_calls.py	Tue Jan 16 10:41:38 2024 +0100
@@ -5,6 +5,7 @@
 
 # from gi.repository import GLib
 from gi.repository import GObject, Gst, GstWebRTC, GstSdp
+from kivy.metrics import dp
 
 try:
     from gi.overrides import Gst as _
@@ -27,6 +28,7 @@
 from kivy.support import install_gobject_iteration
 from kivy.uix.button import Button
 from kivy.uix.image import Image
+from kivy.uix.popup import Popup
 from kivy.uix.screenmanager import Screen
 from kivy.uix.widget import Widget
 from libervia.backend.core.constants import Const as C
@@ -35,7 +37,7 @@
 from libervia.backend.core import exceptions
 from libervia.backend.tools.common import data_format
 from libervia.frontends.quick_frontend import quick_widgets
-from libervia.frontends.tools import aio, jid, webrtc
+from libervia.frontends.tools import aio, display_servers, jid, webrtc
 
 from libervia.desktop_kivy import G
 
@@ -101,7 +103,9 @@
 
     test_mode: bool = False
 
-    PROXIED_PROPERTIES = {'audio_muted', 'callee', 'sid', 'video_muted'}
+    PROXIED_PROPERTIES = {
+        'audio_muted', 'callee', 'desktop_sharing', 'sid', 'video_muted', 'desktop_sharing_data'
+    }
     PROXIED_METHODS = {'answer_call', 'end_call', 'on_accepted_call', 'on_ice_candidates_new', 'setup_call', 'start_pipeline'}
 
     def __init__(self, parent_calls: "Calls", profile: str) -> None:
@@ -239,11 +243,39 @@
             if buf is not None and mapinfo is not None:
                 buf.unmap(mapinfo)
 
+class WindowSelectButton(Button):
+    pass
+
+
+class DesktopScreenDialog(Popup):
+    windows_buttons = ObjectProperty()
+
+    def __init__(self, calls: "Calls", **kwargs):
+        super().__init__(**kwargs)
+        self.calls = calls
+        if display_servers.detect() == display_servers.X11:
+            windows_data = display_servers.x11_list_windows()
+            for window_data in windows_data:
+                log.debug(f"- X11 windows found: {window_data}")
+                button = WindowSelectButton(
+                    text = window_data["title"],
+                    on_press=partial(self.on_window_selected, xid=window_data["id"])
+                )
+                self.windows_buttons.add_widget(button)
+
+    def on_window_selected(self, instance, xid: str) -> None:
+        if xid is not None:
+            self.calls.webrtc.desktop_sharing_data = {"xid": xid}
+        else:
+            self.calls.webrtc.desktop_sharing_data = None
+        self.calls.desktop_sharing = True
+        self.dismiss()
+
 
 class Calls(
-        quick_widgets.QuickWidget,
-        cagou_widget.LiberviaDesktopKivyWidget,
-        FilterBehavior
+    quick_widgets.QuickWidget,
+    cagou_widget.LiberviaDesktopKivyWidget,
+    FilterBehavior
 ):
     audio_muted = BooleanProperty(False)
     call_layout = ObjectProperty()
@@ -259,6 +291,7 @@
     signals_registered = False
     use_header_input = True
     video_muted = BooleanProperty(False)
+    desktop_sharing = BooleanProperty(False)
 
     def __init__(self, host, target, profiles):
         quick_widgets.QuickWidget.__init__(self, G.host, target, profiles)
@@ -382,6 +415,15 @@
     def on_video_muted(self, instance, muted: bool) -> None:
         self.webrtc.video_muted = muted
 
+    def on_desktop_btn_press(self) -> None:
+        if self.desktop_sharing:
+            self.desktop_sharing = False
+        else:
+            DesktopScreenDialog(self).open()
+
+    def on_desktop_sharing(self, instance, active: bool) -> None:
+        self.webrtc.desktop_sharing = active
+
     def on_fullscreen(self, instance, fullscreen: bool) -> None:
         if fullscreen:
             G.host.app.show_head_widget(False, animation=False)