#include "flutter_window.h" #include <optional> #include "flutter/generated_plugin_registrant.h" FlutterWindow::FlutterWindow(RunLoop* run_loop, const flutter::DartProject& project) : run_loop_(run_loop), project_(project) {} FlutterWindow::~FlutterWindow() {} bool FlutterWindow::OnCreate() { if (!Win32Window::OnCreate()) { return false; } RECT frame = GetClientArea(); // The size here must match the window dimensions to avoid unnecessary surface // 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. if (!flutter_controller_->engine() || !flutter_controller_->view()) { return false; } RegisterPlugins(flutter_controller_->engine()); run_loop_->RegisterFlutterInstance(flutter_controller_->engine()); SetChildContent(flutter_controller_->view()->GetNativeWindow()); return true; } void FlutterWindow::OnDestroy() { if (flutter_controller_) { run_loop_->UnregisterFlutterInstance(flutter_controller_->engine()); flutter_controller_ = nullptr; } Win32Window::OnDestroy(); } LRESULT FlutterWindow::MessageHandler(HWND hwnd, UINT const message, WPARAM const wparam, LPARAM const lparam) noexcept { // Give Flutter, including plugins, an opporutunity to handle window messages. if (flutter_controller_) { std::optional<LRESULT> result = flutter_controller_->HandleTopLevelWindowProc(hwnd, message, wparam, lparam); if (result) { return *result; } } switch (message) { case WM_FONTCHANGE: flutter_controller_->engine()->ReloadSystemFonts(); break; } return Win32Window::MessageHandler(hwnd, message, wparam, lparam); }