/*
 # Copyright (c) 2009, 2010 - OpenSLX Project, Computer Center University of
 # Freiburg
 #
 # This program is free software distributed under the GPL version 2.
 # See http://openslx.org/COPYING
 #
 # If you have any feedback please consult http://openslx.org/feedback and
 # send your suggestions, praise, or complaints to feedback@openslx.org
 #
 # General information about OpenSLX can be found at http://openslx.org/
 */

#ifndef VNCCLIENTTHREAD_H_
#define VNCCLIENTTHREAD_H_

#include <QtCore>
#include <QImage>
#include <QThread>
#include <QSharedPointer>

class QPainter;

extern "C"
{
#include <rfb/rfbclient.h>
}

/**
 * VncThread - communicate with VNC server, scale image if necessary.
 *
 * As this class is derived from QThread and overrides the run() method,
 * it does not have an event-loop. Do NOT try to add any slots to it.
 * It will NOT be able to receive signals. Emitting signals is fine though.
 */
class VncThread : public QThread
{
	Q_OBJECT

private:
	rfbClient *_client;

	QString _host;
	int _port;
	QString _passwd;
	int _quality;

	QSharedPointer<QImage> _img;

	volatile bool _connected;
	volatile bool _run;
	bool _started;

	void calcScaling();
	void processImageUpdate(int x, int y, int w, int h);
	void emitStarted();

	// Callbacks for rfb lib. make them class members so the callbacks can access private members of the class.

	static void updateImage(rfbClient *client, int x, int y, int w, int h);
	static char* passwdHandler(rfbClient *client);
	static rfbBool frameBufferHandler(rfbClient *client);

public:
	VncThread(QString host, int port, QString passwd, int quality);
	~VncThread();

	const QString getDesktopName() const;
	bool isConnected() { return _connected; }
	void stop() { _run = false; }
	const QSharedPointer<QImage>& getFrameBuffer() { return _img; }
	void run();

	int const static HIGH = 0;
	int const static MEDIUM = 1;
	int const static LOW = 2;

signals:
	void imageUpdated(const int x, const int y, const int w, const int h);
	void projectionStarted();
	void projectionStopped();

};

#endif /* VNCCLIENTTHREAD_H_ */