Desktop: Hook up native window controls (#3161)

* Implement window controls

* Fix drag target size

* Maximize with drag area double click

desktop/src/app.rs

@@ -164,6 +164,11 @@ impl WinitApp {
 					window.set_minimized(minimized);
 				}
 			}
+			DesktopFrontendMessage::DragWindow => {
+				if let Some(window) = &self.window {
+					let _ = window.drag_window();
+				}
+			}
 			DesktopFrontendMessage::CloseWindow => {
 				let _ = self.event_loop_proxy.send_event(CustomEvent::CloseWindow);
 			}
@@ -271,7 +276,9 @@ impl ApplicationHandler<CustomEvent> for WinitApp {
 		let mut window = Window::default_attributes()
 			.with_title(APP_NAME)
 			.with_min_inner_size(winit::dpi::LogicalSize::new(400, 300))
-			.with_inner_size(winit::dpi::LogicalSize::new(1200, 800));
+			.with_inner_size(winit::dpi::LogicalSize::new(1200, 800))
+			.with_decorations(false)
+			.with_resizable(true);
 
 		#[cfg(target_os = "linux")]
 		{

desktop/wrapper/src/intercept_frontend_message.rs

@@ -70,6 +70,9 @@ pub(super) fn intercept_frontend_message(dispatcher: &mut DesktopWrapperMessageD
 			// Forward this to update the UI
 			return Some(message);
 		}
+		FrontendMessage::DragWindow => {
+			dispatcher.respond(DesktopFrontendMessage::DragWindow);
+		}
 		FrontendMessage::CloseWindow => {
 			dispatcher.respond(DesktopFrontendMessage::CloseWindow);
 		}

desktop/wrapper/src/messages.rs

@@ -36,6 +36,8 @@ pub enum DesktopFrontendMessage {
 		maximized: bool,
 		minimized: bool,
 	},
+	DragWindow,
+	CloseWindow,
 	PersistenceWriteDocument {
 		id: DocumentId,
 		document: Document,
@@ -55,7 +57,6 @@ pub enum DesktopFrontendMessage {
 		preferences: Preferences,
 	},
 	PersistenceLoadPreferences,
-	CloseWindow,
 }
 
 pub enum DesktopWrapperMessage {