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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the tools applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef COMMUNICATIONSTARTER_H
#define COMMUNICATIONSTARTER_H
#include <QtCore/QSharedPointer>
#include <QtCore/QObject>
namespace trk {
class TrkDevice;
class BluetoothListener;
struct BaseCommunicationStarterPrivate;
/* BaseCommunicationStarter: A QObject that repeatedly tries to open a
* trk device until a connection succeeds or a timeout occurs (emitting
* signals), allowing to do something else in the foreground (local event loop
* [say QMessageBox] or some asynchronous operation). If the initial
* connection attempt in start() fails, the
* virtual initializeStartupResources() is called to initialize resources
* required to pull up the communication (namely Bluetooth listeners).
* The base class can be used as is to prompt the user to launch App TRK for a
* serial communication as this requires no further resource setup. */
class BaseCommunicationStarter : public QObject {
Q_OBJECT
Q_DISABLE_COPY(BaseCommunicationStarter)
public:
typedef QSharedPointer<TrkDevice> TrkDevicePtr;
enum State { Running, Connected, TimedOut };
explicit BaseCommunicationStarter(const TrkDevicePtr& trkDevice, QObject *parent = 0);
virtual ~BaseCommunicationStarter();
int intervalMS() const;
void setIntervalMS(int i);
int attempts() const;
void setAttempts(int a);
QString device() const;
void setDevice(const QString &);
State state() const;
QString errorString() const;
enum StartResult {
Started, // Starter is now running.
ConnectionSucceeded, /* Initial connection attempt succeeded,
* no need to keep running. */
StartError // Error occurred during start.
};
StartResult start();
signals:
void connected();
void timeout();
void message(const QString &);
private slots:
void slotTimer();
protected:
virtual bool initializeStartupResources(QString *errorMessage);
private:
inline void stopTimer();
BaseCommunicationStarterPrivate *d;
};
/* AbstractBluetoothStarter: Repeatedly tries to open a trk Bluetooth
* device. Note that in case a Listener is already running mode, the
* connection will succeed immediately.
* initializeStartupResources() is implemented to fire up the listener.
* Introduces a new virtual createListener() that derived classes must
* implement as a factory function that creates and sets up the
* listener (mode, message connection, etc). */
class AbstractBluetoothStarter : public BaseCommunicationStarter {
Q_OBJECT
Q_DISABLE_COPY(AbstractBluetoothStarter)
public:
protected:
explicit AbstractBluetoothStarter(const TrkDevicePtr& trkDevice, QObject *parent = 0);
// Implemented to fire up the listener.
virtual bool initializeStartupResources(QString *errorMessage);
// New virtual: Overwrite to create and parametrize the listener.
virtual BluetoothListener *createListener() = 0;
};
/* ConsoleBluetoothStarter: Convenience class for console processes. Creates a
* listener in "Listen" mode with the messages redirected to standard output. */
class ConsoleBluetoothStarter : public AbstractBluetoothStarter {
Q_OBJECT
Q_DISABLE_COPY(ConsoleBluetoothStarter)
public:
static bool startBluetooth(const TrkDevicePtr& trkDevice,
QObject *listenerParent,
const QString &device,
int attempts,
QString *errorMessage);
protected:
virtual BluetoothListener *createListener();
private:
explicit ConsoleBluetoothStarter(const TrkDevicePtr& trkDevice,
QObject *listenerParent,
QObject *parent = 0);
QObject *m_listenerParent;
};
} // namespace trk
#endif // COMMUNICATIONSTARTER_H
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