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engines/ags/events.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef AGS_EVENTS_H
+#define AGS_EVENTS_H
+
+#include "shared/ac/keycode.h"
+#include "common/array.h"
+#include "common/queue.h"
+#include "common/events.h"
+
+namespace AGS {
+
+class EventsManager {
+private:
+	Common::Queue<Common::Event> _pendingEvents;
+	Common::Queue<Common::Event> _keyEvents;
+	Common::Array<bool> _keys;
+	Common::Point _mousePos;
+	int16 _joystickAxis[32];
+	bool _joystickButton[32];
+	byte _keyModifierFlags = 0;
+
+	bool isModifierKey(const Common::KeyCode &keycode) const;
+	bool isExtendedKey(const Common::KeyCode &keycode) const;
+
+	void updateKeys(const Common::Event &event, bool isDown);
+public:
+	/**
+	 * Converts ags key to ScummVM scancode
+	 */
+	static bool ags_key_to_scancode(AGS3::eAGSKeyCode key, Common::KeyCode(&kc)[3]);
+
+	/*
+	 * Converts a ScummVM event to the ags keycode
+	 */
+	static AGS3::eAGSKeyCode scummvm_key_to_ags_key(const Common::Event &event, int &ags_mod, bool old_keyhandle);
+
+public:
+	EventsManager();
+	~EventsManager();
+
+	/**
+	 * Poll any pending events
+	 */
+	void pollEvents();
+
+	/**
+	 * Returns true if any unprocessed keyboard events are pending
+	 */
+	bool keyEventPending() const {
+		return !_keyEvents.empty();
+	}
+
+	/**
+	 * Returns the next pending unprocessed keyboard event
+	 */
+	Common::Event getPendingKeyEvent() {
+		return _keyEvents.pop();
+	}
+
+	/**
+	 * Returns the bitset of currently pressed modifier keys
+	 */
+	uint getModifierFlags() const {
+		return _keyModifierFlags;
+	}
+
+	/**
+	 * Pushes a keydown event into the keypresses queue,
+	 * without updating the key down flag array
+	 */
+	void pushKeyboardEvent(const Common::Event &evt) {
+		_keyEvents.push(evt);
+	}
+
+	/**
+	 * Returns the next event, if any
+	 */
+	Common::Event readEvent();
+
+	/**
+	 * Sets the mouse position
+	 */
+	void warpMouse(const Common::Point &newPos);
+
+	/**
+	 * Returns true if a given key is pressed
+	 */
+	bool isKeyPressed(AGS3::eAGSKeyCode key, bool poll = true);
+
+	void clearEvents() {
+		_pendingEvents.clear();
+		_keyEvents.clear();
+	}
+
+	/**
+	 * Get the current mouse position
+	 */
+	Common::Point getMousePos() const {
+		return _mousePos;
+	}
+
+	/**
+	 * Gets a joystick axis position
+	 */
+	int16 getJoystickAxis(byte axis) const {
+		assert(axis < 32);
+		return _joystickAxis[axis];
+	}
+
+	/**
+	 * Gets whether a given joystick button is down
+	 */
+	bool getJoystickButton(byte button) const {
+		assert(button < 32);
+		return _joystickButton[button];
+	}
+
+	/**
+	 * Gets whether a given joystick button is down once
+	 */
+	bool getJoystickButtonOnce(byte button) {
+		assert(button < 32);
+		bool result = _joystickButton[button];
+		_joystickButton[button] = false;
+		return result;
+	}
+};
+
+extern EventsManager *g_events;
+
+} // namespace AGS
+
+#endif