1 /**

     2  * Spacenav Demo Qt

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

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, either version 3 of the License, or

     8  * (at your option) any later version.

     9  *

    10  * This program is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    13  * GNU General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU General Public License

    16  * along with this program. If not, see <http://www.gnu.org/licenses/>.

    17  */

    18 #pragma once

    19 

    20 #include <iostream>

    21 #include <QObject>

    22 #include <QThread>

    23 #include <spnav.h>

    24 

    25 Q_DECLARE_METATYPE(spnav_event)

    26 

    27 class SpacenavReceiver : public QThread {

    28 

    29 	Q_OBJECT

    30 public:

    31 

    32 

    33 	SpacenavReceiver() : QThread() {

    34 	}

    35 

    36 	virtual ~SpacenavReceiver() {

    37 		spnav_close();

    38 	}

    39 

    40 	void run() {

    41 		Display* display;

    42 		Window window;

    43 		unsigned long blackPixel;

    44 

    45 		spnav_event event;

    46 

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

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

    49 			return; // TODO: throw exception

    50 		}

    51 

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

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

    54 

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

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

    57 			return; // TODO: throw exception

    58 

    59 			/**

    60 			 * TODO: try also unix socket

    61 			 * 

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

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

    64 			 * 		return 1;

    65 			 * 	}

    66 			 */

    67 		}

    68 

    69 		// For stopping this thread by pressing both buttons:

    70 		// bool pressed0 = false;

    71 		// bool pressed1 = false;

    72 

    73 		while (spnav_wait_event(&event)) {

    74 			if (event.type == SPNAV_EVENT_MOTION) {

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

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

    77 

    78 			} else { /* SPNAV_EVENT_BUTTON */

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

    80 

    81 				// if (sev.button.bnum == 0) pressed0 = sev.button.press;

    82 				// if (sev.button.bnum == 1) pressed1 = sev.button.press;

    83 				// if (pressed0 && pressed1) break;

    84 			}

    85 			emit spacenavEvent(event);

    86 		}

    87 

    88 	}

    89 

    90 signals:

    91 	void spacenavEvent(spnav_event sev);

    92 };