1/* Copyright (c) 2013-2014 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#include "InputController.h"
  7
  8#include "ConfigController.h"
  9#include "GamepadAxisEvent.h"
 10#include "GamepadButtonEvent.h"
 11
 12#include <QApplication>
 13#include <QTimer>
 14#include <QWidget>
 15
 16extern "C" {
 17#include "util/configuration.h"
 18}
 19
 20using namespace QGBA;
 21
 22InputController::InputController(QObject* parent)
 23	: QObject(parent)
 24	, m_config(nullptr)
 25	, m_gamepadTimer(nullptr)
 26{
 27	GBAInputMapInit(&m_inputMap);
 28
 29#ifdef BUILD_SDL
 30	m_sdlEvents.bindings = &m_inputMap;
 31	GBASDLInitEvents(&m_sdlEvents);
 32	GBASDLInitBindings(&m_inputMap);
 33	SDL_JoystickEventState(SDL_QUERY);
 34
 35	m_gamepadTimer = new QTimer(this);
 36	connect(m_gamepadTimer, SIGNAL(timeout()), this, SLOT(testGamepad()));
 37	m_gamepadTimer->setInterval(50);
 38	m_gamepadTimer->start();
 39#endif
 40
 41	GBAInputBindKey(&m_inputMap, KEYBOARD, Qt::Key_X, GBA_KEY_A);
 42	GBAInputBindKey(&m_inputMap, KEYBOARD, Qt::Key_Z, GBA_KEY_B);
 43	GBAInputBindKey(&m_inputMap, KEYBOARD, Qt::Key_A, GBA_KEY_L);
 44	GBAInputBindKey(&m_inputMap, KEYBOARD, Qt::Key_S, GBA_KEY_R);
 45	GBAInputBindKey(&m_inputMap, KEYBOARD, Qt::Key_Return, GBA_KEY_START);
 46	GBAInputBindKey(&m_inputMap, KEYBOARD, Qt::Key_Backspace, GBA_KEY_SELECT);
 47	GBAInputBindKey(&m_inputMap, KEYBOARD, Qt::Key_Up, GBA_KEY_UP);
 48	GBAInputBindKey(&m_inputMap, KEYBOARD, Qt::Key_Down, GBA_KEY_DOWN);
 49	GBAInputBindKey(&m_inputMap, KEYBOARD, Qt::Key_Left, GBA_KEY_LEFT);
 50	GBAInputBindKey(&m_inputMap, KEYBOARD, Qt::Key_Right, GBA_KEY_RIGHT);
 51}
 52
 53InputController::~InputController() {
 54	GBAInputMapDeinit(&m_inputMap);
 55
 56#ifdef BUILD_SDL
 57	GBASDLDeinitEvents(&m_sdlEvents);
 58#endif
 59}
 60
 61void InputController::setConfiguration(ConfigController* config) {
 62	m_config = config;
 63	loadConfiguration(KEYBOARD);
 64#ifdef BUILD_SDL
 65	loadConfiguration(SDL_BINDING_BUTTON);
 66#endif
 67}
 68
 69void InputController::loadConfiguration(uint32_t type) {
 70	GBAInputMapLoad(&m_inputMap, type, m_config->configuration());
 71}
 72
 73void InputController::saveConfiguration(uint32_t type) {
 74	GBAInputMapSave(&m_inputMap, type, m_config->configuration());
 75	m_config->write();
 76}
 77
 78GBAKey InputController::mapKeyboard(int key) const {
 79	return GBAInputMapKey(&m_inputMap, KEYBOARD, key);
 80}
 81
 82void InputController::bindKey(uint32_t type, int key, GBAKey gbaKey) {
 83	return GBAInputBindKey(&m_inputMap, type, key, gbaKey);
 84}
 85
 86#ifdef BUILD_SDL
 87int InputController::testSDLEvents() {
 88	SDL_Joystick* joystick = m_sdlEvents.joystick;
 89	SDL_JoystickUpdate();
 90	int numButtons = SDL_JoystickNumButtons(joystick);
 91	int activeButtons = 0;
 92	int i;
 93	for (i = 0; i < numButtons; ++i) {
 94		GBAKey key = GBAInputMapKey(&m_inputMap, SDL_BINDING_BUTTON, i);
 95		if (key == GBA_KEY_NONE) {
 96			continue;
 97		}
 98		if (hasPendingEvent(key)) {
 99			continue;
100		}
101		if (SDL_JoystickGetButton(joystick, i)) {
102			activeButtons |= 1 << key;
103		}
104	}
105	int numHats = SDL_JoystickNumHats(joystick);
106	for (i = 0; i < numHats; ++i) {
107		int hat = SDL_JoystickGetHat(joystick, i);
108		if (hat & SDL_HAT_UP) {
109			activeButtons |= 1 << GBA_KEY_UP;
110		}
111		if (hat & SDL_HAT_LEFT) {
112			activeButtons |= 1 << GBA_KEY_LEFT;
113		}
114		if (hat & SDL_HAT_DOWN) {
115			activeButtons |= 1 << GBA_KEY_DOWN;
116		}
117		if (hat & SDL_HAT_RIGHT) {
118			activeButtons |= 1 << GBA_KEY_RIGHT;
119		}
120	}
121
122	int numAxes = SDL_JoystickNumAxes(joystick);
123	for (i = 0; i < numAxes; ++i) {
124		int value = SDL_JoystickGetAxis(joystick, i);
125
126		enum GBAKey key = GBAInputMapAxis(&m_inputMap, SDL_BINDING_BUTTON, i, value);
127		if (key != GBA_KEY_NONE) {
128			activeButtons |= 1 << key;
129		}
130	}
131	return activeButtons;
132}
133
134QSet<int> InputController::activeGamepadButtons() {
135	SDL_Joystick* joystick = m_sdlEvents.joystick;
136	SDL_JoystickUpdate();
137	int numButtons = SDL_JoystickNumButtons(joystick);
138	QSet<int> activeButtons;
139	int i;
140	for (i = 0; i < numButtons; ++i) {
141		if (SDL_JoystickGetButton(joystick, i)) {
142			activeButtons.insert(i);
143		}
144	}
145	return activeButtons;
146}
147
148QSet<QPair<int, GamepadAxisEvent::Direction>> InputController::activeGamepadAxes() {
149	SDL_Joystick* joystick = m_sdlEvents.joystick;
150	SDL_JoystickUpdate();
151	int numButtons = SDL_JoystickNumAxes(joystick);
152	QSet<QPair<int, GamepadAxisEvent::Direction>> activeAxes;
153	int i;
154	for (i = 0; i < numButtons; ++i) {
155		int32_t axis = SDL_JoystickGetAxis(joystick, i);
156		if (axis >= AXIS_THRESHOLD || axis <= -AXIS_THRESHOLD) {
157			activeAxes.insert(qMakePair(i, axis > 0 ? GamepadAxisEvent::POSITIVE : GamepadAxisEvent::NEGATIVE));
158		}
159	}
160	return activeAxes;
161}
162
163void InputController::bindAxis(uint32_t type, int axis, GamepadAxisEvent::Direction direction, GBAKey key) {
164	const GBAAxis* old = GBAInputQueryAxis(&m_inputMap, SDL_BINDING_BUTTON, axis);
165	GBAAxis description = { GBA_KEY_NONE, GBA_KEY_NONE, -AXIS_THRESHOLD, AXIS_THRESHOLD };
166	if (old) {
167		description = *old;
168	}
169	switch (direction) {
170	case GamepadAxisEvent::NEGATIVE:
171		description.lowDirection = key;
172		description.deadLow = -AXIS_THRESHOLD;
173		break;
174	case GamepadAxisEvent::POSITIVE:
175		description.highDirection = key;
176		description.deadHigh = AXIS_THRESHOLD;
177		break;
178	default:
179		return;
180	}
181	GBAInputBindAxis(&m_inputMap, SDL_BINDING_BUTTON, axis, &description);
182}
183#endif
184
185void InputController::testGamepad() {
186#ifdef BUILD_SDL
187	auto activeAxes = activeGamepadAxes();
188	auto oldAxes = m_activeAxes;
189	m_activeAxes = activeAxes;
190
191	auto activeButtons = activeGamepadButtons();
192	auto oldButtons = m_activeButtons;
193	m_activeButtons = activeButtons;
194
195	if (!QApplication::focusWidget()) {
196		return;
197	}
198
199	activeAxes.subtract(oldAxes);
200	oldAxes.subtract(m_activeAxes);
201
202	for (auto& axis : m_activeAxes) {
203		bool newlyAboveThreshold = activeAxes.contains(axis);
204		GamepadAxisEvent* event = new GamepadAxisEvent(axis.first, axis.second, newlyAboveThreshold, this);
205		if (newlyAboveThreshold) {
206			postPendingEvent(event->gbaKey());
207			if (!event->isAccepted()) {
208				clearPendingEvent(event->gbaKey());
209			}
210		} else if (oldAxes.contains(axis)) {
211			clearPendingEvent(event->gbaKey());
212		}
213		QApplication::sendEvent(QApplication::focusWidget(), event);
214	}
215
216	activeButtons.subtract(oldButtons);
217	oldButtons.subtract(m_activeButtons);
218
219	for (int button : activeButtons) {
220		GamepadButtonEvent* event = new GamepadButtonEvent(GamepadButtonEvent::Down(), button, this);
221		postPendingEvent(event->gbaKey());
222		QApplication::sendEvent(QApplication::focusWidget(), event);
223		if (!event->isAccepted()) {
224			clearPendingEvent(event->gbaKey());
225		}
226	}
227	for (int button : oldButtons) {
228		GamepadButtonEvent* event = new GamepadButtonEvent(GamepadButtonEvent::Up(), button, this);
229		clearPendingEvent(event->gbaKey());
230		QApplication::sendEvent(QApplication::focusWidget(), event);
231	}
232#endif
233}
234
235void InputController::postPendingEvent(GBAKey key) {
236	m_pendingEvents.insert(key);
237}
238
239void InputController::clearPendingEvent(GBAKey key) {
240	m_pendingEvents.remove(key);
241}
242
243bool InputController::hasPendingEvent(GBAKey key) const {
244	return m_pendingEvents.contains(key);
245}