diff -r 37aa134ae57b -r 2a3e9f07c128 src/SpacenavReceiver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/SpacenavReceiver.h	Wed Mar 06 20:28:34 2019 +0100
@@ -0,0 +1,92 @@
+/**
+ * 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:
+		// bool pressed0 = false;
+		// bool pressed1 = false;
+
+		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;
+
+				// if (sev.button.bnum == 0) pressed0 = sev.button.press;
+				// if (sev.button.bnum == 1) pressed1 = sev.button.press;
+				// if (pressed0 && pressed1) break;
+			}
+			emit spacenavEvent(event);
+		}
+
+	}
+
+signals:
+	void spacenavEvent(spnav_event sev);
+};
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