MRTouchpadWin32Handler.h

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#pragma once
#ifdef _WIN32
 
#include "MRTouchpadController.h"
 
#pragma warning( push )
#pragma warning( disable: 4265 )
#pragma warning( disable: 4986 )
#pragma warning( disable: 5204 )
#pragma warning( disable: 5220 )
#include <directmanipulation.h>
#include <wrl.h>
#pragma warning( pop )
 
#include <map>
 
namespace MR
{
 
// Touchpad event handler for Windows using Direct Manipulation API
// More info: https://learn.microsoft.com/en-us/windows/win32/directmanipulation/direct-manipulation-portal
class TouchpadWin32Handler : public TouchpadController::Handler
{
public:
    TouchpadWin32Handler( GLFWwindow* window );
    ~TouchpadWin32Handler() override;
 
    static LRESULT WINAPI WindowSubclassProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
    static void CALLBACK TouchpadEventPoll( PVOID lpParam, BOOLEAN timerOrWaitFired );
 
private:
    HWND window_;
 
    LONG_PTR glfwProc_{ NULL };
    void processPointerHitTestEvent_( WPARAM wParam );
 
    Microsoft::WRL::ComPtr<IDirectManipulationManager> manager_;
    Microsoft::WRL::ComPtr<IDirectManipulationUpdateManager> updateManager_;
    Microsoft::WRL::ComPtr<IDirectManipulationViewport> viewport_;
 
    class DirectManipulationViewportEventHandler;
    Microsoft::WRL::ComPtr<DirectManipulationViewportEventHandler> eventHandler_;
    DWORD eventHandlerCookie_;
 
    friend class DirectManipulationViewportEventHandler;
    HANDLE timerQueue_{ NULL };
    HANDLE timer_{ NULL };
    void startTouchpadEventPolling_();
    void stopTouchpadEventPolling_();
 
    static std::map<HWND, MR::TouchpadWin32Handler*>& registry_();
    static MR::TouchpadWin32Handler* findHandler_( HWND view );
};
 
} // namespace MR
 
#endif