* Now: is_desktop can only be set at the creation with egui::Context::new insted of default!

* Removed: egui::Context::is_desktop, egui::Context::set_desktop
* Added: egui::Context::force_embedding, egui::Context::set_force_embedding

crates/eframe/src/native/epi_integration.rs

@@ -333,10 +333,11 @@ impl EpiIntegration {
         app_name: &str,
         native_options: &crate::NativeOptions,
         storage: Option<Box<dyn epi::Storage>>,
+        desktop: bool,
         #[cfg(feature = "glow")] gl: Option<std::sync::Arc<glow::Context>>,
         #[cfg(feature = "wgpu")] wgpu_render_state: Option<egui_wgpu::RenderState>,
     ) -> Self {
-        let egui_ctx = egui::Context::default();
+        let egui_ctx = egui::Context::new(desktop);
 
         let memory = load_egui_memory(storage.as_deref()).unwrap_or_default();
         egui_ctx.memory_mut(|mem| *mem = memory);

crates/eframe/src/native/run.rs

@@ -19,6 +19,16 @@ use super::epi_integration::{self, EpiIntegration};
 
 // ----------------------------------------------------------------------------
 
+pub const IS_DESKTOP: bool = cfg!(any(
+    target_os = "windows",
+    target_os = "linux",
+    target_os = "macos",
+    target_os = "freebsd",
+    target_os = "openbsd"
+));
+
+// ----------------------------------------------------------------------------
+
 #[derive(Debug)]
 pub enum UserEvent {
     RequestRepaint {
@@ -891,6 +901,7 @@ mod glow_integration {
                 &self.app_name,
                 &self.native_options,
                 storage,
+                IS_DESKTOP,
                 Some(gl.clone()),
                 #[cfg(feature = "wgpu")]
                 None,
@@ -908,12 +919,6 @@ mod glow_integration {
             let theme = system_theme.unwrap_or(self.native_options.default_theme);
             integration.egui_ctx.set_visuals(theme.egui_visuals());
 
-            // !!! WARNING This is needed to be improved !!!
-            // I don't really know not to detect if is on desktop or web/mobile
-            // This allows to have multiples windows
-
-            integration.egui_ctx.set_desktop(true);
-
             gl_window
                 .window(ViewportId::MAIN)
                 .read()
@@ -1885,6 +1890,7 @@ mod wgpu_integration {
                 &self.app_name,
                 &self.native_options,
                 storage,
+                IS_DESKTOP,
                 #[cfg(feature = "glow")]
                 None,
                 wgpu_render_state.clone(),