src/events/Event.hh at main · doomsdayone/openmsx

◆ main openmsx / src / events / Event.hh

17.9 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw

#ifndef EVENT_HH
#define EVENT_HH

#include "JoystickId.hh"
#include "RenderSettings.hh"
#include "SDLKey.hh"
#include "StringStorage.hh"
#include "TclObject.hh"

#include "static_vector.hh"
#include "stl.hh"

#include <cassert>
#include <cstdint>
#include <string>
#include <utility>
#include <variant>

#include <SDL.h>

namespace openmsx {

class CliConnection;
enum class EventType : uint8_t;

// --- The actual event classes (the Event class refers to one of these) ---

class EventBase {};

class SdlEvent : public EventBase
{
public:
	explicit SdlEvent(const SDL_Event& e) : evt(e) {}
	[[nodiscard]] const SDL_Event& getSdlEvent() const { return evt; }
	[[nodiscard]] const SDL_CommonEvent& getCommonSdlEvent() const { return evt.common; }

protected:
	SDL_Event evt;
};


class KeyEvent : public SdlEvent
{
public:
	using SdlEvent::SdlEvent;

	[[nodiscard]] bool         getRepeat()    const { return evt.key.repeat; }
	[[nodiscard]] SDL_Keycode  getKeyCode()   const { return evt.key.keysym.sym; }
	[[nodiscard]] SDL_Scancode getScanCode()  const { return evt.key.keysym.scancode; }
	[[nodiscard]] uint16_t     getModifiers() const { return evt.key.keysym.mod; }
	[[nodiscard]] uint32_t     getUnicode()   const {
		// HACK: repurposed 'unused' field as 'unicode' field
		return evt.key.keysym.unused;
	}
	[[nodiscard]] SDLKey getKey() const { return {.sym = evt.key.keysym, .down = evt.type == SDL_KEYDOWN}; }
};

class KeyUpEvent final : public KeyEvent
{
public:
	using KeyEvent::KeyEvent;

	[[nodiscard]] static KeyUpEvent create(SDL_Keycode code, SDL_Keymod mod = KMOD_NONE) {
		SDL_Event evt;
		evt.key = SDL_KeyboardEvent{};
		auto& e = evt.key;

		e.type = SDL_KEYUP;
		e.timestamp = SDL_GetTicks();
		e.state = SDL_RELEASED;
		e.keysym.sym = code;
		e.keysym.mod = mod;
		return KeyUpEvent(evt);
	}
};

class KeyDownEvent final : public KeyEvent
{
public:
	using KeyEvent::KeyEvent;

	[[nodiscard]] static KeyDownEvent create(SDL_Keycode code, SDL_Keymod mod = KMOD_NONE) {
		SDL_Event evt;
		evt.key = SDL_KeyboardEvent{};
		auto& e = evt.key;

		e.type = SDL_KEYDOWN;
		e.timestamp = SDL_GetTicks();
		e.state = SDL_PRESSED;
		e.keysym.sym = code;
		e.keysym.mod = mod;
		return KeyDownEvent(evt);
	}
	[[nodiscard]] static KeyDownEvent create(uint32_t timestamp, unsigned unicode) {
		SDL_Event evt;
		evt.key = SDL_KeyboardEvent{};
		auto& e = evt.key;

		e.type = SDL_KEYDOWN;
		e.timestamp = timestamp;
		e.state = SDL_PRESSED;
		e.keysym.sym = SDLK_UNKNOWN;
		e.keysym.mod = KMOD_NONE;
		e.keysym.unused = unicode;
		return KeyDownEvent(evt);
	}
};


class MouseButtonEvent : public SdlEvent
{
public:
	using SdlEvent::SdlEvent;

	[[nodiscard]] auto getButton() const { return evt.button.button; }
};

class MouseButtonUpEvent final : public MouseButtonEvent
{
public:
	using MouseButtonEvent::MouseButtonEvent;
};

class MouseButtonDownEvent final : public MouseButtonEvent
{
public:
	using MouseButtonEvent::MouseButtonEvent;
};

class MouseWheelEvent final : public SdlEvent
{
public:
	using SdlEvent::SdlEvent;

	[[nodiscard]] int getX() const { return normalize(evt.wheel.x); }
	[[nodiscard]] int getY() const { return normalize(evt.wheel.y); }

private:
	[[nodiscard]] int normalize(int x) const {
		return evt.wheel.direction == SDL_MOUSEWHEEL_FLIPPED ? -x : x;
	}
};

class MouseMotionEvent final : public SdlEvent
{
public:
	using SdlEvent::SdlEvent;

	[[nodiscard]] int getX() const    { return evt.motion.xrel; }
	[[nodiscard]] int getY() const    { return evt.motion.yrel; }
	[[nodiscard]] int getAbsX() const { return evt.motion.x; }
	[[nodiscard]] int getAbsY() const { return evt.motion.y; }
};


class JoystickEvent : public SdlEvent
{
public:
	using SdlEvent::SdlEvent;

	[[nodiscard]] JoystickId getJoystick() const {
		// SDL joystick instance ID has already been translated to an openMSX JoystickID
		return JoystickId(evt.jbutton.which);
	}
};

class JoystickButtonEvent : public JoystickEvent
{
public:
	using JoystickEvent::JoystickEvent;

	[[nodiscard]] unsigned getButton() const { return evt.jbutton.button; }
};

class JoystickButtonUpEvent final : public JoystickButtonEvent
{
public:
	using JoystickButtonEvent::JoystickButtonEvent;
};

class JoystickButtonDownEvent final : public JoystickButtonEvent
{
public:
	using JoystickButtonEvent::JoystickButtonEvent;
};

class JoystickAxisMotionEvent final : public JoystickEvent
{
public:
	static constexpr uint8_t X_AXIS = 0;
	static constexpr uint8_t Y_AXIS = 1;

	using JoystickEvent::JoystickEvent;

	[[nodiscard]] uint8_t getAxis() const { return evt.jaxis.axis; }
	[[nodiscard]] int16_t getValue() const { return evt.jaxis.value; }
};

class JoystickHatEvent final : public JoystickEvent
{
public:
	using JoystickEvent::JoystickEvent;

	[[nodiscard]] uint8_t getHat()   const { return evt.jhat.hat; }
	[[nodiscard]] uint8_t getValue() const { return evt.jhat.value; }
};


class WindowEvent : public SdlEvent
{
public:
	using SdlEvent::SdlEvent;

	[[nodiscard]] const SDL_WindowEvent& getSdlWindowEvent() const { return evt.window; }
	[[nodiscard]] bool isMainWindow() const { return isMainWindow(evt.window.windowID); }

public:
	static void setMainWindowId(uint32_t id) { mainWindowId = id; }
	static uint32_t getMainWindowId() { return mainWindowId; }
	[[nodiscard]] static bool isMainWindow(unsigned id) { return id == mainWindowId; }
private:
	static inline uint32_t mainWindowId = unsigned(-1);
};


class TextEvent : public SdlEvent
{
public:
	using SdlEvent::SdlEvent;
};


class FileDropEvent final : public EventBase
{
public:
	explicit FileDropEvent(std::string_view fileName_)
		: fileName(allocate_c_string(fileName_)) {}
	FileDropEvent(const FileDropEvent&) { assert(false); }
	FileDropEvent& operator=(const FileDropEvent&) { assert(false); return *this; }
	FileDropEvent(FileDropEvent&&) = default;
	FileDropEvent& operator=(FileDropEvent&&) = default;
	~FileDropEvent() = default;

	[[nodiscard]] zstring_view getFileName() const { return fileName.get(); }

private:
	StringStorage fileName;
};


class QuitEvent final : public EventBase {};


/** OSD events are triggered by other events. They aggregate keyboard and
 * joystick events into one set of events that can be used to e.g. control
 * OSD elements.
 */
class OsdControlEvent : public EventBase
{
public:
	enum class Button : uint8_t {LEFT, RIGHT, UP, DOWN, A, B, NUM};
	[[nodiscard]] Button getButton() const { return button; }

protected:
	explicit OsdControlEvent(Button button_)
		: button(button_) {}

private:
	Button button;
};

class OsdControlReleaseEvent final : public OsdControlEvent
{
public:
	explicit OsdControlReleaseEvent(Button button_)
		: OsdControlEvent(button_) {}
};

class OsdControlPressEvent final : public OsdControlEvent
{
public:
	explicit OsdControlPressEvent(Button button_)
		: OsdControlEvent(button_) {}
};


class GroupEvent final : public EventBase
{
public:
	GroupEvent(std::initializer_list<EventType> typesToMatch_, TclObject tclListComponents_)
		: typesToMatch(typesToMatch_)
		, tclListComponents(std::move(tclListComponents_)) {}

	[[nodiscard]] const auto& getTypesToMatch() const { return typesToMatch; }
	[[nodiscard]] const auto& getTclListComponents() const { return tclListComponents; }

private:
	static_vector<EventType, 3> typesToMatch;
	TclObject tclListComponents;
};

/**
 * This event is send when a device (v99x8, v9990, video9000, laserdisc)
 * reaches the end of a frame. This event has info on:
 *  - which device generated the event
 *  - which video layer was active
 *  - was the frame actually rendered or not (frameskip)
 * Note that even if a frame was rendered (not skipped) it may not (need to) be
 * displayed because the corresponding video layer is not active. Or also even
 * if the corresponding video layer for a device is not active, the rendered
 * frame may still be displayed as part of a superimposed video layer.
 */
class FinishFrameEvent final : public EventBase
{
public:
	FinishFrameEvent(int thisSource_, int selectedSource_,
	                 bool skipped_)
		: thisSource(thisSource_), selectedSource(selectedSource_)
		, skipped(skipped_)
	{
	}

	[[nodiscard]] int getSource()         const { return thisSource; }
	[[nodiscard]] int getSelectedSource() const { return selectedSource; }
	[[nodiscard]] bool isSkipped() const { return skipped; }
	[[nodiscard]] bool needRender() const { return !skipped && (thisSource == selectedSource); }

private:
	int thisSource;
	int selectedSource;
	bool skipped;
};

/** Command received on CliComm connection. */
class CliCommandEvent final : public EventBase
{
public:
	CliCommandEvent(std::string_view command_, const CliConnection* id_)
		: command(allocate_c_string(command_)), id(id_) {}
	CliCommandEvent(const CliCommandEvent&) { assert(false); }
	CliCommandEvent& operator=(const CliCommandEvent&) { assert(false); return *this; }
	CliCommandEvent(CliCommandEvent&&) = default;
	CliCommandEvent& operator=(CliCommandEvent&&) = default;
	~CliCommandEvent() = default;

	[[nodiscard]] zstring_view getCommand() const { return command.get(); }
	[[nodiscard]] const CliConnection* getId() const { return id; }

private:
	StringStorage command;
	const CliConnection* id;
};

class ImGuiActiveEvent final : public EventBase
{
public:
	explicit ImGuiActiveEvent(bool active_)
		: active(active_) {}
	[[nodiscard]] bool getActive() const { return active; }

private:
	bool active;
};

class SwitchRendererEvent final : public EventBase {
public:
	explicit SwitchRendererEvent(RenderSettings::RendererID id_)
		: id(id_) {}
	[[nodiscard]] auto getRenderer() const { return id; }

private:
	RenderSettings::RendererID id;

};

// Events that don't need additional data
class SimpleEvent : public EventBase {};

/** Sent when the MSX resets or powers up. */
class BootEvent                  final : public SimpleEvent {};

/** Sent when a FINISH_FRAME caused a redraw of the screen.
  * So in other words send when a FINISH_FRAME event was send
  * and the frame was not skipped and the event came from the active video
  * source. */
class FrameDrawnEvent            final : public SimpleEvent {};

class BreakEvent                 final : public SimpleEvent {};
class ContinueEvent              final : public SimpleEvent {};

/** Used to schedule 'taking reverse snapshots' between Z80 instructions. */
class TakeReverseSnapshotEvent   final : public SimpleEvent {};

/** Send when an after-EmuTime command should be executed. */
class AfterTimedEvent            final : public SimpleEvent {};

/** Send when a (new) machine configuration is loaded. */
class MachineLoadedEvent         final : public SimpleEvent {};

/** Send when a machine is (de)activated.
  * This events is specific per machine. */
class MachineActivatedEvent      final : public SimpleEvent {};
class MachineDeactivatedEvent    final : public SimpleEvent {};

class MidiInReaderEvent          final : public SimpleEvent {};
class MidiInWindowsEvent         final : public SimpleEvent {};
class MidiInCoreMidiEvent        final : public SimpleEvent {};
class MidiInCoreMidiVirtualEvent final : public SimpleEvent {};
class MidiInALSAEvent            final : public SimpleEvent {};
class Rs232TesterEvent           final : public SimpleEvent {};
class Rs232NetEvent              final : public SimpleEvent {};
class Rs232RawEvent              final : public SimpleEvent {};
class ImGuiDelayedActionEvent    final : public SimpleEvent {};

/** Send when changed host keyboard layout. */
class KeyMapChangedEvent          final : public SimpleEvent {};

// --- Put all (non-abstract) Event classes into a std::variant ---

using Event = std::variant<
	KeyUpEvent,
	KeyDownEvent,
	MouseMotionEvent,
	MouseButtonUpEvent,
	MouseButtonDownEvent,
	MouseWheelEvent,
	JoystickAxisMotionEvent,
	JoystickHatEvent,
	JoystickButtonUpEvent,
	JoystickButtonDownEvent,
	OsdControlReleaseEvent,
	OsdControlPressEvent,
	WindowEvent,
	TextEvent,
	FileDropEvent,
	QuitEvent,
	FinishFrameEvent,
	CliCommandEvent,
	GroupEvent,
	BootEvent,
	FrameDrawnEvent,
	BreakEvent,
	ContinueEvent,
	SwitchRendererEvent,
	TakeReverseSnapshotEvent,
	AfterTimedEvent,
	MachineLoadedEvent,
	MachineActivatedEvent,
	MachineDeactivatedEvent,
	MidiInReaderEvent,
	MidiInWindowsEvent,
	MidiInCoreMidiEvent,
	MidiInCoreMidiVirtualEvent,
	MidiInALSAEvent,
	Rs232TesterEvent,
	Rs232NetEvent,
	Rs232RawEvent,
	ImGuiDelayedActionEvent,
	ImGuiActiveEvent,
	KeyMapChangedEvent
>;

template<typename T>
inline constexpr uint8_t event_index = get_index<T, Event>::value;


// --- Define an enum for all concrete event types. ---
// Use the numeric value from the corresponding index in the Event.
enum class EventType : uint8_t
{
	KEY_UP                   = event_index<KeyUpEvent>,
	KEY_DOWN                 = event_index<KeyDownEvent>,
	MOUSE_MOTION             = event_index<MouseMotionEvent>,
	MOUSE_BUTTON_UP          = event_index<MouseButtonUpEvent>,
	MOUSE_BUTTON_DOWN        = event_index<MouseButtonDownEvent>,
	MOUSE_WHEEL              = event_index<MouseWheelEvent>,
	JOY_AXIS_MOTION          = event_index<JoystickAxisMotionEvent>,
	JOY_HAT                  = event_index<JoystickHatEvent>,
	JOY_BUTTON_UP            = event_index<JoystickButtonUpEvent>,
	JOY_BUTTON_DOWN          = event_index<JoystickButtonDownEvent>,
	OSD_CONTROL_RELEASE      = event_index<OsdControlReleaseEvent>,
	OSD_CONTROL_PRESS        = event_index<OsdControlPressEvent>,
	WINDOW                   = event_index<WindowEvent>,
	TEXT                     = event_index<TextEvent>,
	FILE_DROP                = event_index<FileDropEvent>,
	QUIT                     = event_index<QuitEvent>,
	GROUP                    = event_index<GroupEvent>,
	BOOT                     = event_index<BootEvent>,
	FINISH_FRAME             = event_index<FinishFrameEvent>,
	FRAME_DRAWN              = event_index<FrameDrawnEvent>,
	BREAK                    = event_index<BreakEvent>,
	CONTINUE                 = event_index<ContinueEvent>,
	SWITCH_RENDERER          = event_index<SwitchRendererEvent>,
	TAKE_REVERSE_SNAPSHOT    = event_index<TakeReverseSnapshotEvent>,
	CLICOMMAND               = event_index<CliCommandEvent>,
	AFTER_TIMED              = event_index<AfterTimedEvent>,
	MACHINE_LOADED           = event_index<MachineLoadedEvent>,
	MACHINE_ACTIVATED        = event_index<MachineActivatedEvent>,
	MACHINE_DEACTIVATED      = event_index<MachineDeactivatedEvent>,
	MIDI_IN_READER           = event_index<MidiInReaderEvent>,
	MIDI_IN_WINDOWS          = event_index<MidiInWindowsEvent>,
	MIDI_IN_COREMIDI         = event_index<MidiInCoreMidiEvent>,
	MIDI_IN_COREMIDI_VIRTUAL = event_index<MidiInCoreMidiVirtualEvent>,
	MIDI_IN_ALSA             = event_index<MidiInALSAEvent>,
	RS232_TESTER             = event_index<Rs232TesterEvent>,
	RS232_NET                = event_index<Rs232NetEvent>,
	RS232_RAW                = event_index<Rs232RawEvent>,
	IMGUI_DELAYED_ACTION     = event_index<ImGuiDelayedActionEvent>,
	IMGUI_ACTIVE             = event_index<ImGuiActiveEvent>,
	KEYMAP_CHANGED           = event_index<KeyMapChangedEvent>,

	NUM_EVENT_TYPES // must be last
};


// --- Event class, free functions ---

[[nodiscard]] EventType getType(const Event& event);

/** Get a string representation of this event. */
[[nodiscard]] std::string toString(const Event& event);

/** Similar to toString(), but retains the structure of the event. */
[[nodiscard]] TclObject toTclList(const Event& event);

[[nodiscard]] bool operator==(const Event& x, const Event& y);

/** Does this event 'match' the given event. Normally an event
  * only matches itself (as defined by operator==). But e.g.
  * MouseMotionGroupEvent matches any MouseMotionEvent. */
[[nodiscard]] bool matches(const Event& self, const Event& other);


// --- Event class implementation, free functions ---

inline EventType getType(const Event& event)
{
	return EventType(event.index());
}

// Similar to std::get() and std::get_if()
template<typename T>
struct GetIfEventHelper { // standard std::get_if() behavior
	const T* operator()(const Event& event) {
		return std::get_if<T>(&event);
	}
};
template<>
struct GetIfEventHelper<SdlEvent> { // extension for base-classes
	[[nodiscard]] const SdlEvent* operator()(const Event& event) const {
		const auto& var = event;
		switch (EventType(var.index())) {
		using enum EventType;
		case KEY_UP:            return &std::get<KeyUpEvent>(var);
		case KEY_DOWN:          return &std::get<KeyDownEvent>(var);
		case MOUSE_BUTTON_UP:   return &std::get<MouseButtonUpEvent>(var);
		case MOUSE_BUTTON_DOWN: return &std::get<MouseButtonDownEvent>(var);
		case MOUSE_WHEEL:       return &std::get<MouseWheelEvent>(var);
		case MOUSE_MOTION:      return &std::get<MouseMotionEvent>(var);
		case JOY_BUTTON_UP:     return &std::get<JoystickButtonUpEvent>(var);
		case JOY_BUTTON_DOWN:   return &std::get<JoystickButtonDownEvent>(var);
		case JOY_AXIS_MOTION:   return &std::get<JoystickAxisMotionEvent>(var);
		case JOY_HAT:           return &std::get<JoystickHatEvent>(var);
		case WINDOW:            return &std::get<WindowEvent>(var);
		case TEXT:              return &std::get<TextEvent>(var);
		default: return nullptr;
		}
	}
};
template<>
struct GetIfEventHelper<KeyEvent> {
	[[nodiscard]] const KeyEvent* operator()(const Event& event) const {
		const auto& var = event;
		switch (EventType(var.index())) {
		using enum EventType;
		case KEY_UP:   return &std::get<KeyUpEvent>(var);
		case KEY_DOWN: return &std::get<KeyDownEvent>(var);
		default: return nullptr;
		}
	}
};
template<>
struct GetIfEventHelper<JoystickEvent> {
	[[nodiscard]] const JoystickEvent* operator()(const Event& event) const {
		const auto& var = event;
		switch (EventType(var.index())) {
		using enum EventType;
		case JOY_BUTTON_UP:   return &std::get<JoystickButtonUpEvent>(var);
		case JOY_BUTTON_DOWN: return &std::get<JoystickButtonDownEvent>(var);
		case JOY_AXIS_MOTION: return &std::get<JoystickAxisMotionEvent>(var);
		case JOY_HAT:         return &std::get<JoystickHatEvent>(var);
		default: return nullptr;
		}
	}
};
template<typename T>
const T* get_event_if(const Event& event)
{
	GetIfEventHelper<T> helper;
	return helper(event);
}
template<typename T>
const T& get_event(const Event& event)
{
	const T* t = get_event_if<T>(event);
	assert(t);
	return *t;
}

} // namespace openmsx

#endif

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e8555c89 Andy McCall 1 month ago	1	#ifndef EVENT_HH
	2	#define EVENT_HH
	3
	4	#include "JoystickId.hh"
	5	#include "RenderSettings.hh"
	6	#include "SDLKey.hh"
	7	#include "StringStorage.hh"
	8	#include "TclObject.hh"
	9
	10	#include "static_vector.hh"
	11	#include "stl.hh"
	12
	13	#include <cassert>
	14	#include <cstdint>
	15	#include <string>
	16	#include <utility>
	17	#include <variant>
	18
	19	#include <SDL.h>
	20
	21	namespace openmsx {
	22
	23	class CliConnection;
	24	enum class EventType : uint8_t;
	25
	26	// --- The actual event classes (the Event class refers to one of these) ---
	27
	28	class EventBase {};
	29
	30	class SdlEvent : public EventBase
	31	{
	32	public:
	33	explicit SdlEvent(const SDL_Event& e) : evt(e) {}
	34	[[nodiscard]] const SDL_Event& getSdlEvent() const { return evt; }
	35	[[nodiscard]] const SDL_CommonEvent& getCommonSdlEvent() const { return evt.common; }
	36
	37	protected:
	38	SDL_Event evt;
	39	};
	40
	41
	42	class KeyEvent : public SdlEvent
	43	{
	44	public:
	45	using SdlEvent::SdlEvent;
	46
	47	[[nodiscard]] bool getRepeat() const { return evt.key.repeat; }
	48	[[nodiscard]] SDL_Keycode getKeyCode() const { return evt.key.keysym.sym; }
	49	[[nodiscard]] SDL_Scancode getScanCode() const { return evt.key.keysym.scancode; }
	50	[[nodiscard]] uint16_t getModifiers() const { return evt.key.keysym.mod; }
	51	[[nodiscard]] uint32_t getUnicode() const {
	52	// HACK: repurposed 'unused' field as 'unicode' field
	53	return evt.key.keysym.unused;
	54	}
	55	[[nodiscard]] SDLKey getKey() const { return {.sym = evt.key.keysym, .down = evt.type == SDL_KEYDOWN}; }
	56	};
	57
	58	class KeyUpEvent final : public KeyEvent
	59	{
	60	public:
	61	using KeyEvent::KeyEvent;
	62
	63	[[nodiscard]] static KeyUpEvent create(SDL_Keycode code, SDL_Keymod mod = KMOD_NONE) {
	64	SDL_Event evt;
65	evt.key = SDL_KeyboardEvent{};
66	auto& e = evt.key;
67
68	e.type = SDL_KEYUP;
69	e.timestamp = SDL_GetTicks();
70	e.state = SDL_RELEASED;
71	e.keysym.sym = code;
72	e.keysym.mod = mod;
73	return KeyUpEvent(evt);
74	}
75	};
76
77	class KeyDownEvent final : public KeyEvent
78	{
79	public:
80	using KeyEvent::KeyEvent;
81
82	[[nodiscard]] static KeyDownEvent create(SDL_Keycode code, SDL_Keymod mod = KMOD_NONE) {
83	SDL_Event evt;
84	evt.key = SDL_KeyboardEvent{};
85	auto& e = evt.key;
86
87	e.type = SDL_KEYDOWN;
88	e.timestamp = SDL_GetTicks();
89	e.state = SDL_PRESSED;
90	e.keysym.sym = code;
91	e.keysym.mod = mod;
92	return KeyDownEvent(evt);
93	}
94	[[nodiscard]] static KeyDownEvent create(uint32_t timestamp, unsigned unicode) {
95	SDL_Event evt;
96	evt.key = SDL_KeyboardEvent{};
97	auto& e = evt.key;
98
99	e.type = SDL_KEYDOWN;
100	e.timestamp = timestamp;
101	e.state = SDL_PRESSED;
102	e.keysym.sym = SDLK_UNKNOWN;
103	e.keysym.mod = KMOD_NONE;
104	e.keysym.unused = unicode;
105	return KeyDownEvent(evt);
106	}
107	};
108
109
110	class MouseButtonEvent : public SdlEvent
111	{
112	public:
113	using SdlEvent::SdlEvent;
114
115	[[nodiscard]] auto getButton() const { return evt.button.button; }
116	};
117
118	class MouseButtonUpEvent final : public MouseButtonEvent
119	{
120	public:
121	using MouseButtonEvent::MouseButtonEvent;
122	};
123
124	class MouseButtonDownEvent final : public MouseButtonEvent
125	{
126	public:
127	using MouseButtonEvent::MouseButtonEvent;
128	};
129
130	class MouseWheelEvent final : public SdlEvent
131	{
132	public:
133	using SdlEvent::SdlEvent;
134
135	[[nodiscard]] int getX() const { return normalize(evt.wheel.x); }
136	[[nodiscard]] int getY() const { return normalize(evt.wheel.y); }
137
138	private:
139	[[nodiscard]] int normalize(int x) const {
140	return evt.wheel.direction == SDL_MOUSEWHEEL_FLIPPED ? -x : x;
141	}
142	};
143
144	class MouseMotionEvent final : public SdlEvent
145	{
146	public:
147	using SdlEvent::SdlEvent;
148
149	[[nodiscard]] int getX() const { return evt.motion.xrel; }
150	[[nodiscard]] int getY() const { return evt.motion.yrel; }
151	[[nodiscard]] int getAbsX() const { return evt.motion.x; }
152	[[nodiscard]] int getAbsY() const { return evt.motion.y; }
153	};
154
155
156	class JoystickEvent : public SdlEvent
157	{
158	public:
159	using SdlEvent::SdlEvent;
160
161	[[nodiscard]] JoystickId getJoystick() const {
162	// SDL joystick instance ID has already been translated to an openMSX JoystickID
163	return JoystickId(evt.jbutton.which);
164	}
165	};
166
167	class JoystickButtonEvent : public JoystickEvent
168	{
169	public:
170	using JoystickEvent::JoystickEvent;
171
172	[[nodiscard]] unsigned getButton() const { return evt.jbutton.button; }
173	};
174
175	class JoystickButtonUpEvent final : public JoystickButtonEvent
176	{
177	public:
178	using JoystickButtonEvent::JoystickButtonEvent;
179	};
180
181	class JoystickButtonDownEvent final : public JoystickButtonEvent
182	{
183	public:
184	using JoystickButtonEvent::JoystickButtonEvent;
185	};
186
187	class JoystickAxisMotionEvent final : public JoystickEvent
188	{
189	public:
190	static constexpr uint8_t X_AXIS = 0;
191	static constexpr uint8_t Y_AXIS = 1;
192
193	using JoystickEvent::JoystickEvent;
194
195	[[nodiscard]] uint8_t getAxis() const { return evt.jaxis.axis; }
196	[[nodiscard]] int16_t getValue() const { return evt.jaxis.value; }
197	};
198
199	class JoystickHatEvent final : public JoystickEvent
200	{
201	public:
202	using JoystickEvent::JoystickEvent;
203
204	[[nodiscard]] uint8_t getHat() const { return evt.jhat.hat; }
205	[[nodiscard]] uint8_t getValue() const { return evt.jhat.value; }
206	};
207
208
209	class WindowEvent : public SdlEvent
210	{
211	public:
212	using SdlEvent::SdlEvent;
213
214	[[nodiscard]] const SDL_WindowEvent& getSdlWindowEvent() const { return evt.window; }
215	[[nodiscard]] bool isMainWindow() const { return isMainWindow(evt.window.windowID); }
216
217	public:
218	static void setMainWindowId(uint32_t id) { mainWindowId = id; }
219	static uint32_t getMainWindowId() { return mainWindowId; }
220	[[nodiscard]] static bool isMainWindow(unsigned id) { return id == mainWindowId; }
221	private:
222	static inline uint32_t mainWindowId = unsigned(-1);
223	};
224
225
226	class TextEvent : public SdlEvent
227	{
228	public:
229	using SdlEvent::SdlEvent;
230	};
231
232
233	class FileDropEvent final : public EventBase
234	{
235	public:
236	explicit FileDropEvent(std::string_view fileName_)
237	: fileName(allocate_c_string(fileName_)) {}
238	FileDropEvent(const FileDropEvent&) { assert(false); }
239	FileDropEvent& operator=(const FileDropEvent&) { assert(false); return *this; }
240	FileDropEvent(FileDropEvent&&) = default;
241	FileDropEvent& operator=(FileDropEvent&&) = default;
242	~FileDropEvent() = default;
243
244	[[nodiscard]] zstring_view getFileName() const { return fileName.get(); }
245
246	private:
247	StringStorage fileName;
248	};
249
250
251	class QuitEvent final : public EventBase {};
252
253
254	/** OSD events are triggered by other events. They aggregate keyboard and
255	* joystick events into one set of events that can be used to e.g. control
256	* OSD elements.
257	*/
258	class OsdControlEvent : public EventBase
259	{
260	public:
261	enum class Button : uint8_t {LEFT, RIGHT, UP, DOWN, A, B, NUM};
262	[[nodiscard]] Button getButton() const { return button; }
263
264	protected:
265	explicit OsdControlEvent(Button button_)
266	: button(button_) {}
267
268	private:
269	Button button;
270	};
271
272	class OsdControlReleaseEvent final : public OsdControlEvent
273	{
274	public:
275	explicit OsdControlReleaseEvent(Button button_)
276	: OsdControlEvent(button_) {}
277	};
278
279	class OsdControlPressEvent final : public OsdControlEvent
280	{
281	public:
282	explicit OsdControlPressEvent(Button button_)
283	: OsdControlEvent(button_) {}
284	};
285
286
287	class GroupEvent final : public EventBase
288	{
289	public:
290	GroupEvent(std::initializer_list<EventType> typesToMatch_, TclObject tclListComponents_)
291	: typesToMatch(typesToMatch_)
292	, tclListComponents(std::move(tclListComponents_)) {}
293
294	[[nodiscard]] const auto& getTypesToMatch() const { return typesToMatch; }
295	[[nodiscard]] const auto& getTclListComponents() const { return tclListComponents; }
296
297	private:
298	static_vector<EventType, 3> typesToMatch;
299	TclObject tclListComponents;
300	};
301
302	/**
303	* This event is send when a device (v99x8, v9990, video9000, laserdisc)
304	* reaches the end of a frame. This event has info on:
305	* - which device generated the event
306	* - which video layer was active
307	* - was the frame actually rendered or not (frameskip)
308	* Note that even if a frame was rendered (not skipped) it may not (need to) be
309	* displayed because the corresponding video layer is not active. Or also even
310	* if the corresponding video layer for a device is not active, the rendered
311	* frame may still be displayed as part of a superimposed video layer.
312	*/
313	class FinishFrameEvent final : public EventBase
314	{
315	public:
316	FinishFrameEvent(int thisSource_, int selectedSource_,
317	bool skipped_)
318	: thisSource(thisSource_), selectedSource(selectedSource_)
319	, skipped(skipped_)
320	{
321	}
322
323	[[nodiscard]] int getSource() const { return thisSource; }
324	[[nodiscard]] int getSelectedSource() const { return selectedSource; }
325	[[nodiscard]] bool isSkipped() const { return skipped; }
326	[[nodiscard]] bool needRender() const { return !skipped && (thisSource == selectedSource); }
327
328	private:
329	int thisSource;
330	int selectedSource;
331	bool skipped;
332	};
333
334	/** Command received on CliComm connection. */
335	class CliCommandEvent final : public EventBase
336	{
337	public:
338	CliCommandEvent(std::string_view command_, const CliConnection* id_)
339	: command(allocate_c_string(command_)), id(id_) {}
340	CliCommandEvent(const CliCommandEvent&) { assert(false); }
341	CliCommandEvent& operator=(const CliCommandEvent&) { assert(false); return *this; }
342	CliCommandEvent(CliCommandEvent&&) = default;
343	CliCommandEvent& operator=(CliCommandEvent&&) = default;
344	~CliCommandEvent() = default;
345
346	[[nodiscard]] zstring_view getCommand() const { return command.get(); }
347	[[nodiscard]] const CliConnection* getId() const { return id; }
348
349	private:
350	StringStorage command;
351	const CliConnection* id;
352	};
353
354	class ImGuiActiveEvent final : public EventBase
355	{
356	public:
357	explicit ImGuiActiveEvent(bool active_)
358	: active(active_) {}
359	[[nodiscard]] bool getActive() const { return active; }
360
361	private:
362	bool active;
363	};
364
365	class SwitchRendererEvent final : public EventBase {
366	public:
367	explicit SwitchRendererEvent(RenderSettings::RendererID id_)
368	: id(id_) {}
369	[[nodiscard]] auto getRenderer() const { return id; }
370
371	private:
372	RenderSettings::RendererID id;
373
374	};
375
376	// Events that don't need additional data
377	class SimpleEvent : public EventBase {};
378
379	/** Sent when the MSX resets or powers up. */
380	class BootEvent final : public SimpleEvent {};
381
382	/** Sent when a FINISH_FRAME caused a redraw of the screen.
383	* So in other words send when a FINISH_FRAME event was send
384	* and the frame was not skipped and the event came from the active video
385	* source. */
386	class FrameDrawnEvent final : public SimpleEvent {};
387
388	class BreakEvent final : public SimpleEvent {};
389	class ContinueEvent final : public SimpleEvent {};
390
391	/** Used to schedule 'taking reverse snapshots' between Z80 instructions. */
392	class TakeReverseSnapshotEvent final : public SimpleEvent {};
393
394	/** Send when an after-EmuTime command should be executed. */
395	class AfterTimedEvent final : public SimpleEvent {};
396
397	/** Send when a (new) machine configuration is loaded. */
398	class MachineLoadedEvent final : public SimpleEvent {};
399
400	/** Send when a machine is (de)activated.
401	* This events is specific per machine. */
402	class MachineActivatedEvent final : public SimpleEvent {};
403	class MachineDeactivatedEvent final : public SimpleEvent {};
404
405	class MidiInReaderEvent final : public SimpleEvent {};
406	class MidiInWindowsEvent final : public SimpleEvent {};
407	class MidiInCoreMidiEvent final : public SimpleEvent {};
408	class MidiInCoreMidiVirtualEvent final : public SimpleEvent {};
409	class MidiInALSAEvent final : public SimpleEvent {};
410	class Rs232TesterEvent final : public SimpleEvent {};
411	class Rs232NetEvent final : public SimpleEvent {};
412	class Rs232RawEvent final : public SimpleEvent {};
413	class ImGuiDelayedActionEvent final : public SimpleEvent {};
414
415	/** Send when changed host keyboard layout. */
416	class KeyMapChangedEvent final : public SimpleEvent {};
417
418	// --- Put all (non-abstract) Event classes into a std::variant ---
419
420	using Event = std::variant<
421	KeyUpEvent,
422	KeyDownEvent,
423	MouseMotionEvent,
424	MouseButtonUpEvent,
425	MouseButtonDownEvent,
426	MouseWheelEvent,
427	JoystickAxisMotionEvent,
428	JoystickHatEvent,
429	JoystickButtonUpEvent,
430	JoystickButtonDownEvent,
431	OsdControlReleaseEvent,
432	OsdControlPressEvent,
433	WindowEvent,
434	TextEvent,
435	FileDropEvent,
436	QuitEvent,
437	FinishFrameEvent,
438	CliCommandEvent,
439	GroupEvent,
440	BootEvent,
441	FrameDrawnEvent,
442	BreakEvent,
443	ContinueEvent,
444	SwitchRendererEvent,
445	TakeReverseSnapshotEvent,
446	AfterTimedEvent,
447	MachineLoadedEvent,
448	MachineActivatedEvent,
449	MachineDeactivatedEvent,
450	MidiInReaderEvent,
451	MidiInWindowsEvent,
452	MidiInCoreMidiEvent,
453	MidiInCoreMidiVirtualEvent,
454	MidiInALSAEvent,
455	Rs232TesterEvent,
456	Rs232NetEvent,
457	Rs232RawEvent,
458	ImGuiDelayedActionEvent,
459	ImGuiActiveEvent,
460	KeyMapChangedEvent
461	>;
462
463	template<typename T>
464	inline constexpr uint8_t event_index = get_index<T, Event>::value;
465
466
467	// --- Define an enum for all concrete event types. ---
468	// Use the numeric value from the corresponding index in the Event.
469	enum class EventType : uint8_t
470	{
471	KEY_UP = event_index<KeyUpEvent>,
472	KEY_DOWN = event_index<KeyDownEvent>,
473	MOUSE_MOTION = event_index<MouseMotionEvent>,
474	MOUSE_BUTTON_UP = event_index<MouseButtonUpEvent>,
475	MOUSE_BUTTON_DOWN = event_index<MouseButtonDownEvent>,
476	MOUSE_WHEEL = event_index<MouseWheelEvent>,
477	JOY_AXIS_MOTION = event_index<JoystickAxisMotionEvent>,
478	JOY_HAT = event_index<JoystickHatEvent>,
479	JOY_BUTTON_UP = event_index<JoystickButtonUpEvent>,
480	JOY_BUTTON_DOWN = event_index<JoystickButtonDownEvent>,
481	OSD_CONTROL_RELEASE = event_index<OsdControlReleaseEvent>,
482	OSD_CONTROL_PRESS = event_index<OsdControlPressEvent>,
483	WINDOW = event_index<WindowEvent>,
484	TEXT = event_index<TextEvent>,
485	FILE_DROP = event_index<FileDropEvent>,
486	QUIT = event_index<QuitEvent>,
487	GROUP = event_index<GroupEvent>,
488	BOOT = event_index<BootEvent>,
489	FINISH_FRAME = event_index<FinishFrameEvent>,
490	FRAME_DRAWN = event_index<FrameDrawnEvent>,
491	BREAK = event_index<BreakEvent>,
492	CONTINUE = event_index<ContinueEvent>,
493	SWITCH_RENDERER = event_index<SwitchRendererEvent>,
494	TAKE_REVERSE_SNAPSHOT = event_index<TakeReverseSnapshotEvent>,
495	CLICOMMAND = event_index<CliCommandEvent>,
496	AFTER_TIMED = event_index<AfterTimedEvent>,
497	MACHINE_LOADED = event_index<MachineLoadedEvent>,
498	MACHINE_ACTIVATED = event_index<MachineActivatedEvent>,
499	MACHINE_DEACTIVATED = event_index<MachineDeactivatedEvent>,
500	MIDI_IN_READER = event_index<MidiInReaderEvent>,
501	MIDI_IN_WINDOWS = event_index<MidiInWindowsEvent>,
502	MIDI_IN_COREMIDI = event_index<MidiInCoreMidiEvent>,
503	MIDI_IN_COREMIDI_VIRTUAL = event_index<MidiInCoreMidiVirtualEvent>,
504	MIDI_IN_ALSA = event_index<MidiInALSAEvent>,
505	RS232_TESTER = event_index<Rs232TesterEvent>,
506	RS232_NET = event_index<Rs232NetEvent>,
507	RS232_RAW = event_index<Rs232RawEvent>,
508	IMGUI_DELAYED_ACTION = event_index<ImGuiDelayedActionEvent>,
509	IMGUI_ACTIVE = event_index<ImGuiActiveEvent>,
510	KEYMAP_CHANGED = event_index<KeyMapChangedEvent>,
511
512	NUM_EVENT_TYPES // must be last
513	};
514
515
516	// --- Event class, free functions ---
517
518	[[nodiscard]] EventType getType(const Event& event);
519
520	/** Get a string representation of this event. */
521	[[nodiscard]] std::string toString(const Event& event);
522
523	/** Similar to toString(), but retains the structure of the event. */
524	[[nodiscard]] TclObject toTclList(const Event& event);
525
526	[[nodiscard]] bool operator==(const Event& x, const Event& y);
527
528	/** Does this event 'match' the given event. Normally an event
529	* only matches itself (as defined by operator==). But e.g.
530	* MouseMotionGroupEvent matches any MouseMotionEvent. */
531	[[nodiscard]] bool matches(const Event& self, const Event& other);
532
533
534	// --- Event class implementation, free functions ---
535
536	inline EventType getType(const Event& event)
537	{
538	return EventType(event.index());
539	}
540
541	// Similar to std::get() and std::get_if()
542	template<typename T>
543	struct GetIfEventHelper { // standard std::get_if() behavior
544	const T* operator()(const Event& event) {
545	return std::get_if<T>(&event);
546	}
547	};
548	template<>
549	struct GetIfEventHelper<SdlEvent> { // extension for base-classes
550	[[nodiscard]] const SdlEvent* operator()(const Event& event) const {
551	const auto& var = event;
552	switch (EventType(var.index())) {
553	using enum EventType;
554	case KEY_UP: return &std::get<KeyUpEvent>(var);
555	case KEY_DOWN: return &std::get<KeyDownEvent>(var);
556	case MOUSE_BUTTON_UP: return &std::get<MouseButtonUpEvent>(var);
557	case MOUSE_BUTTON_DOWN: return &std::get<MouseButtonDownEvent>(var);
558	case MOUSE_WHEEL: return &std::get<MouseWheelEvent>(var);
559	case MOUSE_MOTION: return &std::get<MouseMotionEvent>(var);
560	case JOY_BUTTON_UP: return &std::get<JoystickButtonUpEvent>(var);
561	case JOY_BUTTON_DOWN: return &std::get<JoystickButtonDownEvent>(var);
562	case JOY_AXIS_MOTION: return &std::get<JoystickAxisMotionEvent>(var);
563	case JOY_HAT: return &std::get<JoystickHatEvent>(var);
564	case WINDOW: return &std::get<WindowEvent>(var);
565	case TEXT: return &std::get<TextEvent>(var);
566	default: return nullptr;
567	}
568	}
569	};
570	template<>
571	struct GetIfEventHelper<KeyEvent> {
572	[[nodiscard]] const KeyEvent* operator()(const Event& event) const {
573	const auto& var = event;
574	switch (EventType(var.index())) {
575	using enum EventType;
576	case KEY_UP: return &std::get<KeyUpEvent>(var);
577	case KEY_DOWN: return &std::get<KeyDownEvent>(var);
578	default: return nullptr;
579	}
580	}
581	};
582	template<>
583	struct GetIfEventHelper<JoystickEvent> {
584	[[nodiscard]] const JoystickEvent* operator()(const Event& event) const {
585	const auto& var = event;
586	switch (EventType(var.index())) {
587	using enum EventType;
588	case JOY_BUTTON_UP: return &std::get<JoystickButtonUpEvent>(var);
589	case JOY_BUTTON_DOWN: return &std::get<JoystickButtonDownEvent>(var);
590	case JOY_AXIS_MOTION: return &std::get<JoystickAxisMotionEvent>(var);
591	case JOY_HAT: return &std::get<JoystickHatEvent>(var);
592	default: return nullptr;
593	}
594	}
595	};
596	template<typename T>
597	const T* get_event_if(const Event& event)
598	{
599	GetIfEventHelper<T> helper;
600	return helper(event);
601	}
602	template<typename T>
603	const T& get_event(const Event& event)
604	{
605	const T* t = get_event_if<T>(event);
606	assert(t);
607	return *t;
608	}
609
610	} // namespace openmsx
611
612	#endif