Fix windows status listener

example/windows/CMakeLists.txt

@@ -8,7 +8,7 @@ set(BINARY_NAME "wireguard_dart_example")
 
 # Explicitly opt in to modern CMake behaviors to avoid warnings with recent
 # versions of CMake.
-cmake_policy(SET CMP0063 NEW)
+cmake_policy(VERSION 3.14...3.25)
 
 # Define build configuration option.
 get_property(IS_MULTICONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
@@ -52,6 +52,7 @@ add_subdirectory(${FLUTTER_MANAGED_DIR})
 # Application build; see runner/CMakeLists.txt.
 add_subdirectory("runner")
 
+
 # Generated plugin build rules, which manage building the plugins and adding
 # them to the application.
 include(flutter/generated_plugins.cmake)
@@ -86,6 +87,12 @@ if(PLUGIN_BUNDLED_LIBRARIES)
     COMPONENT Runtime)
 endif()
 
+# Copy the native assets provided by the build.dart from all packages.
+set(NATIVE_ASSETS_DIR "${PROJECT_BUILD_DIR}native_assets/windows/")
+install(DIRECTORY "${NATIVE_ASSETS_DIR}"
+   DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+   COMPONENT Runtime)
+
 # Fully re-copy the assets directory on each build to avoid having stale files
 # from a previous install.
 set(FLUTTER_ASSET_DIR_NAME "flutter_assets")

example/windows/runner/flutter_window.cpp

@@ -26,6 +26,16 @@ bool FlutterWindow::OnCreate() {
   }
   RegisterPlugins(flutter_controller_->engine());
   SetChildContent(flutter_controller_->view()->GetNativeWindow());
+
+  flutter_controller_->engine()->SetNextFrameCallback([&]() {
+    this->Show();
+  });
+
+  // Flutter can complete the first frame before the "show window" callback is
+  // registered. The following call ensures a frame is pending to ensure the
+  // window is shown. It is a no-op if the first frame hasn't completed yet.
+  flutter_controller_->ForceRedraw();
+
   return true;
 }
 

example/windows/runner/main.cpp

@@ -27,7 +27,7 @@ int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev,
   FlutterWindow window(project);
   Win32Window::Point origin(10, 10);
   Win32Window::Size size(1280, 720);
-  if (!window.CreateAndShow(L"wireguard_dart_example", origin, size)) {
+  if (!window.Create(L"wireguard_dart_example", origin, size)) {
     return EXIT_FAILURE;
   }
   window.SetQuitOnClose(true);

example/windows/runner/utils.cpp

@@ -47,16 +47,17 @@ std::string Utf8FromUtf16(const wchar_t* utf16_string) {
   }
   int target_length = ::WideCharToMultiByte(
       CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string,
-      -1, nullptr, 0, nullptr, nullptr);
+      -1, nullptr, 0, nullptr, nullptr)
+    -1; // remove the trailing null character
+  int input_length = (int)wcslen(utf16_string);
   std::string utf8_string;
-  if (target_length == 0 || target_length > utf8_string.max_size()) {
+  if (target_length <= 0 || target_length > utf8_string.max_size()) {
     return utf8_string;
   }
   utf8_string.resize(target_length);
   int converted_length = ::WideCharToMultiByte(
       CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string,
-      -1, utf8_string.data(),
-      target_length, nullptr, nullptr);
+      input_length, utf8_string.data(), target_length, nullptr, nullptr);
   if (converted_length == 0) {
     return std::string();
   }

windows/connection_status_observer.cpp

@@ -6,7 +6,6 @@
 #include <thread>
 
 #include "connection_status.h"
-
 namespace wireguard_dart {
 
 ConnectionStatusObserver::ConnectionStatusObserver() {}
@@ -17,7 +16,22 @@ void ConnectionStatusObserver::StartObserving(std::wstring service_name) {
   if (m_running.load() == true) {
     return;
   }
-  watch_thread = std::thread(&ConnectionStatusObserver::StartObservingThreadProc, this, service_name);
+  if (service_name.size() > 0) {
+    m_service_name = service_name;
+  }
+  SC_HANDLE service_manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
+  if (service_manager == NULL) {
+    return;
+  }
+  SC_HANDLE service = OpenService(service_manager, &m_service_name[0], SERVICE_QUERY_STATUS | SERVICE_INTERROGATE);
+  if (service != NULL) {
+    m_running.store(true);
+    watch_thread = std::thread(&ConnectionStatusObserver::StartObservingThreadProc, this, service_manager, service);
+  } else {
+    CloseServiceHandle(service_manager);
+    m_running.store(false);
+    return;
+  }
 }
 
 void ConnectionStatusObserver::StopObserving() { m_watch_thread_stop.store(true); }
@@ -29,17 +43,7 @@ void ConnectionStatusObserver::Shutdown() {
   }
 }
 
-void ConnectionStatusObserver::StartObservingThreadProc(std::wstring service_name) {
-  m_running.store(true);
-  SC_HANDLE service_manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
-  if (service_manager == NULL) {
-    return;
-  }
-  SC_HANDLE service = OpenService(service_manager, &service_name[0], SERVICE_QUERY_STATUS | SERVICE_INTERROGATE);
-  if (service == NULL) {
-    CloseServiceHandle(service_manager);
-    return;
-  }
+void ConnectionStatusObserver::StartObservingThreadProc(SC_HANDLE service_manager, SC_HANDLE service) {
   SERVICE_NOTIFY s_notify = {0};
   s_notify.dwVersion = SERVICE_NOTIFY_STATUS_CHANGE;
   s_notify.pfnNotifyCallback = &ServiceNotifyCallback;

windows/connection_status_observer.h

@@ -27,12 +27,13 @@ class ConnectionStatusObserver : public flutter::StreamHandler<flutter::Encodabl
  private:
   std::unique_ptr<flutter::EventSink<flutter::EncodableValue>> sink_;
   PSC_NOTIFICATION_REGISTRATION subscription_;
-  void StartObservingThreadProc(std::wstring service_name);
+  void StartObservingThreadProc(SC_HANDLE service_manager, SC_HANDLE service);
 
   void Shutdown();
   std::thread watch_thread;
   std::atomic_bool m_watch_thread_stop;
   std::atomic_bool m_running;
+  std::wstring m_service_name;
 };
 
 }  // namespace wireguard_dart

windows/wireguard_dart_plugin.cpp

@@ -143,12 +143,14 @@ void WireguardDartPlugin::HandleMethodCall(const flutter::MethodCall<flutter::En
       result->Error(std::string(e.what()));
       return;
     }
+    this->connection_status_observer_.get()->StartObserving(L"");
     try {
       tunnel_service->Start();
     } catch (std::exception &e) {
       result->Error(std::string(e.what()));
       return;
     }
+
     result->Success();
     return;
   }