/**

 * Spacenav Demo Qt

 * Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info)

 *

 * 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/>.

 */

#pragma once

#include <iostream>

#include <QObject>

#include <QThread>

#include <spnav.h>

Q_DECLARE_METATYPE(spnav_event)

class SpacenavReceiver : public QThread {

	Q_OBJECT

public:

	SpacenavReceiver() : QThread() {

	}

	virtual ~SpacenavReceiver() {

		spnav_close();

	}

	void run() {

		Display* display;

		Window window;

		unsigned long blackPixel;

		spnav_event event;

		if (!(display = XOpenDisplay(0))) {

			std::wcout << L"unable to connect to the X server" << std::endl;

			return; // TODO: throw exception

		}

		blackPixel = BlackPixel(display, DefaultScreen(display));

		window = XCreateSimpleWindow(display, DefaultRootWindow(display), 0, 0, 1, 1, 0, blackPixel, blackPixel);

		if (spnav_x11_open(display, window) == -1) {

			std::wcout << L"unable to connect to the space navigator daemon" << std::endl;

			return; // TODO: throw exception

			/**

			 * TODO: try also unix socket

			 * 

			 * 	if(spnav_open()==-1) {

			 * 	  	fprintf(stderr, "failed to connect to the space navigator daemon\n");

			 * 		return 1;

			 * 	}

			 */

		}

		// For stopping this thread by pressing both buttons:

		while (spnav_wait_event(&event)) {

			if (event.type == SPNAV_EVENT_MOTION) {

				std::wcout << L"motion event: t(" << event.motion.x << L", " << event.motion.y << L", " << event.motion.z << L") ";

				std::wcout << L"r(" << event.motion.rx << L", " << event.motion.ry << L", " << event.motion.rz << L")" << std::endl;

			} else { /* SPNAV_EVENT_BUTTON */

				std::wcout << L"button " << (event.button.press ? "press" : "release") << L" event b(" << event.button.bnum << L")" << std::endl;

			}

			emit spacenavEvent(event);

		}

	}

signals:

	void spacenavEvent(spnav_event sev);

};