nomo/windows/runner/flutter_window.h

#ifndef RUNNER_FLUTTER_WINDOW_H_
#define RUNNER_FLUTTER_WINDOW_H_

#include <flutter/dart_project.h>
#include <flutter/flutter_view_controller.h>

#include <flutter/method_channel.h>
#include <flutter/standard_method_codec.h>

#include <memory>

#include "win32_window.h"
#include "tray_icon.h"

// A window that does nothing but host a Flutter view.
class FlutterWindow : public Win32Window {
 public:
  // Creates a new FlutterWindow hosting a Flutter view running |project|.
  explicit FlutterWindow(const flutter::DartProject& project);
  virtual ~FlutterWindow();
 public:
  void SetMinimumSize(SIZE size);
  
  // App Events handler
  void onHideWindow();
  void onShowWindow();
  void onToggleWindow();
  void onActiveWindow();
  // Tray Events handler
	void onTrayIconLButtonDown();
	void onTrayIconLButtonUp();
	void onTrayIconRButtonDown();
	void onTrayIconRButtonUp();
 protected:
  // Win32Window:
  bool OnCreate() override;
  void OnDestroy() override;
  LRESULT MessageHandler(HWND window, UINT const message, WPARAM const wparam,
                         LPARAM const lparam) noexcept override;

 private:
  void createMenu(HMENU menu, flutter::EncodableMap args);
  std::optional<LRESULT> handleMessage(HWND window, UINT const message, 
    WPARAM const wparam, LPARAM const lparam);

  void registerMethodChannel(flutter::FlutterEngine* engine);

  void handleAppMethodCall(
    const flutter::MethodCall<flutter::EncodableValue>& method_call,
    std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result);

  void handleTrayMethodCall(
    const flutter::MethodCall<flutter::EncodableValue>& method_call,
    std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result);

  void setSystemTray(
    const flutter::MethodCall<flutter::EncodableValue>& method_call,
    std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result);

  void resetSystemTray(
    const flutter::MethodCall<flutter::EncodableValue>& method_call,
    std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result);

  void setContextMenu(
    const flutter::MethodCall<flutter::EncodableValue>& method_call,
    std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result);

  void popUpContextMenu(
    const flutter::MethodCall<flutter::EncodableValue>& method_call,
    std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result);

  void extractFileIcon(
    const flutter::MethodCall<flutter::EncodableValue>& method_call,
    std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result);

  void getFileDescription(
    const flutter::MethodCall<flutter::EncodableValue>& method_call,
    std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result);

 private:
  SIZE min_window_size_ = {0, 0};
  // The project to run.
  flutter::DartProject project_;

  // The Flutter instance hosted by this window.
  std::unique_ptr<flutter::FlutterViewController> flutter_controller_;

  // The system tray
	TrayIcon m_tray;  
  HMENU m_menuHandle;
};

#endif  // RUNNER_FLUTTER_WINDOW_H_