Desktop: show platform specific window buttons (#3078)

Implement app window button functionality and set platform

desktop/src/app.rs

@@ -2,7 +2,7 @@ use crate::CustomEvent;
 use crate::cef::WindowSize;
 use crate::consts::{APP_NAME, CEF_MESSAGE_LOOP_MAX_ITERATIONS};
 use crate::render::GraphicsState;
-use graphite_desktop_wrapper::messages::{DesktopFrontendMessage, DesktopWrapperMessage};
+use graphite_desktop_wrapper::messages::{DesktopFrontendMessage, DesktopWrapperMessage, Platform};
 use graphite_desktop_wrapper::{DesktopWrapper, NodeGraphExecutionResult, WgpuContext, serialize_frontend_messages};
 
 use rfd::AsyncFileDialog;
@@ -152,6 +152,15 @@ impl WinitApp {
 					graphics_state.set_overlays_scene(scene);
 				}
 			}
+			DesktopFrontendMessage::UpdateWindowState { maximized, minimized } => {
+				if let Some(window) = &self.window {
+					window.set_maximized(maximized);
+					window.set_minimized(minimized);
+				}
+			}
+			DesktopFrontendMessage::CloseWindow => {
+				let _ = self.event_loop_proxy.send_event(CustomEvent::CloseWindow);
+			}
 		}
 	}
 
@@ -223,9 +232,17 @@ impl ApplicationHandler<CustomEvent> for WinitApp {
 		tracing::info!("Winit window created and ready");
 
 		self.desktop_wrapper.init(self.wgpu_context.clone());
+
+		#[cfg(target_os = "windows")]
+		let platform = Platform::Windows;
+		#[cfg(target_os = "macos")]
+		let platform = Platform::Mac;
+		#[cfg(target_os = "linux")]
+		let platform = Platform::Linux;
+		self.dispatch_desktop_wrapper_message(DesktopWrapperMessage::UpdatePlatform(platform));
 	}
 
-	fn user_event(&mut self, _: &ActiveEventLoop, event: CustomEvent) {
+	fn user_event(&mut self, event_loop: &ActiveEventLoop, event: CustomEvent) {
 		match event {
 			CustomEvent::WebCommunicationInitialized => {
 				self.web_communication_initialized = true;
@@ -268,6 +285,12 @@ impl ApplicationHandler<CustomEvent> for WinitApp {
 					self.cef_schedule = Some(instant);
 				}
 			}
+			CustomEvent::CloseWindow => {
+				// TODO: Implement graceful shutdown
+
+				tracing::info!("Exiting main event loop");
+				event_loop.exit();
+			}
 		}
 	}
 
@@ -276,14 +299,12 @@ impl ApplicationHandler<CustomEvent> for WinitApp {
 
 		match event {
 			WindowEvent::CloseRequested => {
-				tracing::info!("The close button was pressed; stopping");
-				event_loop.exit();
+				let _ = self.event_loop_proxy.send_event(CustomEvent::CloseWindow);
 			}
 			WindowEvent::Resized(PhysicalSize { width, height }) => {
 				let _ = self.window_size_sender.send(WindowSize::new(width as usize, height as usize));
 				self.cef_context.notify_of_resize();
 			}
-
 			WindowEvent::RedrawRequested => {
 				let Some(ref mut graphics_state) = self.graphics_state else { return };
 				// Only rerender once we have a new ui texture to display

desktop/src/main.rs

@@ -24,6 +24,7 @@ pub(crate) enum CustomEvent {
 	WebCommunicationInitialized,
 	DesktopWrapperMessage(DesktopWrapperMessage),
 	NodeGraphExecutionResult(NodeGraphExecutionResult),
+	CloseWindow,
 }
 
 fn main() {