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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/
#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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