Touchpad.hh

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#ifndef TOUCHPAD_HH
#define TOUCHPAD_HH
 
#include "EmuTime.hh"
#include "JoystickDevice.hh"
#include "MSXEventListener.hh"
#include "StateChangeListener.hh"
#include "StringSetting.hh"
#include "gl_mat.hh"
 
namespace openmsx {
 
class MSXEventDistributor;
class StateChangeDistributor;
class Display;
class CommandController;
class TclObject;
class Interpreter;
 
class Touchpad final : public JoystickDevice, private MSXEventListener
                     , private StateChangeListener
{
public:
        Touchpad(MSXEventDistributor& eventDistributor,
                 StateChangeDistributor& stateChangeDistributor,
                 Display& display,
                 CommandController& commandController);
        ~Touchpad() override;
 
        template<typename Archive>
        void serialize(Archive& ar, unsigned version);
 
private:
        void createTouchpadStateChange(EmuTime::param time,
                uint8_t x, uint8_t y, bool touch, bool button);
        void parseTransformMatrix(Interpreter& interp, const TclObject& value);
        [[nodiscard]] gl::ivec2 transformCoords(gl::ivec2 xy);
 
        // Pluggable
        [[nodiscard]] std::string_view getName() const override;
        [[nodiscard]] std::string_view getDescription() const override;
        void plugHelper(Connector& connector, EmuTime::param time) override;
        void unplugHelper(EmuTime::param time) override;
 
        // JoystickDevice
        [[nodiscard]] uint8_t read(EmuTime::param time) override;
        void write(uint8_t value, EmuTime::param time) override;
 
        // MSXEventListener
        void signalMSXEvent(const Event& event,
                            EmuTime::param time) noexcept override;
        // StateChangeListener
        void signalStateChange(const StateChange& event) override;
        void stopReplay(EmuTime::param time) noexcept override;
 
private:
        MSXEventDistributor& eventDistributor;
        StateChangeDistributor& stateChangeDistributor;
        Display& display;
 
        StringSetting transformSetting;
        gl::matMxN<2, 3, float> m; // transformation matrix
 
        EmuTime start = EmuTime::zero(); // last time when CS switched 0->1
        gl::ivec2 hostPos;    // host state
        uint8_t hostButtons = 0; //
        uint8_t x = 0, y = 0;               // msx state (different from host state
        bool touch = false, button = false; //            during replay)
        uint8_t shift = 0; // shift register to both transmit and receive data
        uint8_t channel = 0; // [0..3]   0->x, 3->y, 1,2->not used
        uint8_t last = 0; // last written data, to detect transitions
};
 
} // namespace openmsx
 
#endif