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◆ main openmsx / src / events / InputEventGenerator.hh
3.0 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#ifndef INPUTEVENTGENERATOR_HH
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#define INPUTEVENTGENERATOR_HH
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#include "BooleanSetting.hh"
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#include "Command.hh"
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#include "EventListener.hh"
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#include "JoystickManager.hh"
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#include "SDLKey.hh"
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#include <SDL.h>
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#include <cstdint>
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#include <optional>
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namespace openmsx {
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class CommandController;
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class EventDistributor;
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class InputEventGenerator final : private EventListener
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{
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public:
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	InputEventGenerator(CommandController& commandController,
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	                    EventDistributor& eventDistributor);
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	InputEventGenerator(const InputEventGenerator&) = delete;
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	InputEventGenerator(InputEventGenerator&&) = delete;
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	InputEventGenerator& operator=(const InputEventGenerator&) = delete;
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	InputEventGenerator& operator=(InputEventGenerator&&) = delete;
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	~InputEventGenerator();
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	/** Wait for event(s) and handle it.
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	  * This method should be called from the main thread.
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	  */
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	void wait();
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	/** Input Grab on or off */
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	[[nodiscard]] BooleanSetting& getGrabInput() { return grabInput; }
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	/** Must be called when 'grabinput' or 'fullscreen' setting changes. */
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	void updateGrab(bool grab);
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	/** Poll for SDL events and dispatch them.
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	  * @param timeoutMs If provided, wait up to this many milliseconds for
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	  *        the first event using SDL_WaitEventTimeout(). Subsequent
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	  *        events in the same batch use SDL_PollEvent(). If nullopt,
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	  *        uses SDL_PollEvent() for all events (non-blocking).
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	  */
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	void poll(std::optional<int> timeoutMs = {});
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	[[nodiscard]] JoystickManager& getJoystickManager() { return joystickManager; }
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	void initializeGrab() const;
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private:
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	void handle(SDL_Event& evt);
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	void handleKeyDown(const SDL_KeyboardEvent& key, uint32_t unicode);
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	void splitText(uint32_t timestamp, const char* utf8);
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	void setGrabInput(bool grab) const;
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	// EventListener
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	bool signalEvent(const Event& event) override;
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	EventDistributor& eventDistributor;
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	JoystickManager joystickManager;
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	BooleanSetting grabInput;
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	struct EscapeGrabCmd final : Command {
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		explicit EscapeGrabCmd(CommandController& commandController);
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		void execute(std::span<const TclObject> tokens, TclObject& result) override;
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		[[nodiscard]] std::string help(std::span<const TclObject> tokens) const override;
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	} escapeGrabCmd;
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	enum EscapeGrabState : uint8_t {
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		ESCAPE_GRAB_WAIT_CMD,
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		ESCAPE_GRAB_WAIT_LOST,
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		ESCAPE_GRAB_WAIT_GAIN
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	} escapeGrabState = ESCAPE_GRAB_WAIT_CMD;
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	// OsdControl
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	void setNewOsdControlButtonState(unsigned newState);
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	void triggerOsdControlEventsFromJoystickAxisMotion(unsigned axis, int value);
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	void triggerOsdControlEventsFromJoystickHat(int value);
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	void osdControlChangeButton(bool down, unsigned changedButtonMask);
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	void triggerOsdControlEventsFromJoystickButtonEvent(unsigned button, bool down);
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	void triggerOsdControlEventsFromKeyEvent(SDLKey key, bool repeat);
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private:
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	unsigned osdControlButtonsState = unsigned(~0); // 0 is pressed, 1 is released
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	bool sendQuit = false; // only send QuitEvent once
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	// only for Android
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	static inline bool androidButtonA = false;
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	static inline bool androidButtonB = false;
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};
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} // namespace openmsx
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#endif