InputEventGenerator.hh

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#ifndef INPUTEVENTGENERATOR_HH
#define INPUTEVENTGENERATOR_HH

#include "Observer.hh"
#include "BooleanSetting.hh"
#include "EventListener.hh"
#include "Command.hh"
#include "Keys.hh"
#include <SDL.h>
#include <memory>

namespace openmsx {

class CommandController;
class EventDistributor;
class GlobalSettings;

class InputEventGenerator final : private Observer<Setting>
                                , private EventListener
{
public:
        InputEventGenerator(const InputEventGenerator&) = delete;
        InputEventGenerator& operator=(const InputEventGenerator&) = delete;

        InputEventGenerator(CommandController& commandController,
                            EventDistributor& eventDistributor,
                            GlobalSettings& globalSettings);
        ~InputEventGenerator();

        void wait();

        void setKeyRepeat(bool enable);

        BooleanSetting& getGrabInput() { return grabInput; }

        static int joystickNumButtons(SDL_Joystick* joystick);
        static bool joystickGetButton(SDL_Joystick* joystick, int button);

        void poll();

private:
        using EventPtr = std::shared_ptr<const Event>;

        void handle(const SDL_Event& evt);
        void handleKeyDown(const SDL_KeyboardEvent& key, uint32_t unicode);
        void handleText(const char* utf8);
        void setGrabInput(bool grab);

        // Observer<Setting>
        void update(const Setting& setting) override;

        // EventListener
        int signalEvent(const std::shared_ptr<const Event>& event) override;

        EventDistributor& eventDistributor;
        GlobalSettings& globalSettings;
        BooleanSetting grabInput;

        struct EscapeGrabCmd final : Command {
                explicit EscapeGrabCmd(CommandController& commandController);
                void execute(span<const TclObject> tokens, TclObject& result) override;
                std::string help(const std::vector<std::string>& tokens) const override;
        } escapeGrabCmd;

        enum EscapeGrabState {
                ESCAPE_GRAB_WAIT_CMD,
                ESCAPE_GRAB_WAIT_LOST,
                ESCAPE_GRAB_WAIT_GAIN
        } escapeGrabState;

        // OsdControl
        void setNewOsdControlButtonState(
                unsigned newState, const EventPtr& origEvent);
        void triggerOsdControlEventsFromJoystickAxisMotion(
                unsigned axis, int value, const EventPtr& origEvent);
        void triggerOsdControlEventsFromJoystickHat(
                int value, const EventPtr& origEvent);
        void osdControlChangeButton(
                bool up, unsigned changedButtonMask, const EventPtr& origEvent);
        void triggerOsdControlEventsFromJoystickButtonEvent(
                unsigned button, bool up, const EventPtr& origEvent);
        void triggerOsdControlEventsFromKeyEvent(
                Keys::KeyCode keyCode, bool up, const EventPtr& origEvent);


        bool keyRepeat;
        unsigned osdControlButtonsState; // 0 is pressed, 1 is released

        // only for Android
        static bool androidButtonA;
        static bool androidButtonB;
};

} // namespace openmsx

#endif