fix: application window is not visible on Windows (#6740)

* fix: try to fix the windows not visible issue

* chore: update win32_window

* chore: adjust the new api

frontend/appflowy_flutter/windows/runner/flutter_window.cpp

@@ -17,7 +17,7 @@ bool FlutterWindow::OnCreate() {
   RECT frame = GetClientArea();
 
   // The size here must match the window dimensions to avoid unnecessary surface
-// creation / destruction in the startup path.
+  // creation / destruction in the startup path.
   flutter_controller_ = std::make_unique<flutter::FlutterViewController>(
       frame.right - frame.left, frame.bottom - frame.top, project_);
   // Ensure that basic setup of the controller was successful.
@@ -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;
 }
 

frontend/appflowy_flutter/windows/runner/main.cpp

@@ -47,9 +47,12 @@ 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"AppFlowy", origin, size)) {
+
+  if (!window.Create(L"AppFlowy", origin, size)) {
     return EXIT_FAILURE;
   }
+
+  window.Show();
   window.SetQuitOnClose(true);
 
   ::MSG msg;