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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the tools applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "communicationstarter.h"
#include "bluetoothlistener.h"
#include "trkdevice.h"
#include <QtCore/QTimer>
#include <QtCore/QEventLoop>
namespace trk {
// --------------- AbstractBluetoothStarter
struct BaseCommunicationStarterPrivate {
explicit BaseCommunicationStarterPrivate(const BaseCommunicationStarter::TrkDevicePtr &d);
const BaseCommunicationStarter::TrkDevicePtr trkDevice;
BluetoothListener *listener;
QTimer *timer;
int intervalMS;
int attempts;
int n;
QString errorString;
BaseCommunicationStarter::State state;
};
BaseCommunicationStarterPrivate::BaseCommunicationStarterPrivate(const BaseCommunicationStarter::TrkDevicePtr &d) :
trkDevice(d),
listener(0),
timer(0),
intervalMS(1000),
attempts(-1),
n(0),
state(BaseCommunicationStarter::TimedOut)
{
}
BaseCommunicationStarter::BaseCommunicationStarter(const TrkDevicePtr &trkDevice, QObject *parent) :
QObject(parent),
d(new BaseCommunicationStarterPrivate(trkDevice))
{
}
BaseCommunicationStarter::~BaseCommunicationStarter()
{
stopTimer();
delete d;
}
void BaseCommunicationStarter::stopTimer()
{
if (d->timer && d->timer->isActive())
d->timer->stop();
}
bool BaseCommunicationStarter::initializeStartupResources(QString *errorMessage)
{
errorMessage->clear();
return true;
}
BaseCommunicationStarter::StartResult BaseCommunicationStarter::start()
{
if (state() == Running) {
d->errorString = QLatin1String("Internal error, attempt to re-start BaseCommunicationStarter.\n");
return StartError;
}
// Before we instantiate timers, and such, try to open the device,
// which should succeed if another listener is already running in
// 'Watch' mode
if (d->trkDevice->open(&(d->errorString)))
return ConnectionSucceeded;
// Pull up resources for next attempt
d->n = 0;
if (!initializeStartupResources(&(d->errorString)))
return StartError;
// Start timer
if (!d->timer) {
d->timer = new QTimer;
connect(d->timer, SIGNAL(timeout()), this, SLOT(slotTimer()));
}
d->timer->setInterval(d->intervalMS);
d->timer->setSingleShot(false);
d->timer->start();
d->state = Running;
return Started;
}
BaseCommunicationStarter::State BaseCommunicationStarter::state() const
{
return d->state;
}
int BaseCommunicationStarter::intervalMS() const
{
return d->intervalMS;
}
void BaseCommunicationStarter::setIntervalMS(int i)
{
d->intervalMS = i;
if (d->timer)
d->timer->setInterval(i);
}
int BaseCommunicationStarter::attempts() const
{
return d->attempts;
}
void BaseCommunicationStarter::setAttempts(int a)
{
d->attempts = a;
}
QString BaseCommunicationStarter::device() const
{
return d->trkDevice->port();
}
QString BaseCommunicationStarter::errorString() const
{
return d->errorString;
}
void BaseCommunicationStarter::slotTimer()
{
++d->n;
// Check for timeout
if (d->attempts >= 0 && d->n >= d->attempts) {
stopTimer();
d->errorString = tr("%1: timed out after %n attempts using an interval of %2ms.", 0, d->n)
.arg(d->trkDevice->port()).arg(d->intervalMS);
d->state = TimedOut;
emit timeout();
} else {
// Attempt n to connect?
if (d->trkDevice->open(&(d->errorString))) {
stopTimer();
const QString msg = tr("%1: Connection attempt %2 succeeded.").arg(d->trkDevice->port()).arg(d->n);
emit message(msg);
d->state = Connected;
emit connected();
} else {
const QString msg = tr("%1: Connection attempt %2 failed: %3 (retrying)...")
.arg(d->trkDevice->port()).arg(d->n).arg(d->errorString);
emit message(msg);
}
}
}
// --------------- AbstractBluetoothStarter
AbstractBluetoothStarter::AbstractBluetoothStarter(const TrkDevicePtr &trkDevice, QObject *parent) :
BaseCommunicationStarter(trkDevice, parent)
{
}
bool AbstractBluetoothStarter::initializeStartupResources(QString *errorMessage)
{
// Create the listener and forward messages to it.
BluetoothListener *listener = createListener();
connect(this, SIGNAL(message(QString)), listener, SLOT(emitMessage(QString)));
return listener->start(device(), errorMessage);
}
// -------- ConsoleBluetoothStarter
ConsoleBluetoothStarter::ConsoleBluetoothStarter(const TrkDevicePtr &trkDevice,
QObject *listenerParent,
QObject *parent) :
AbstractBluetoothStarter(trkDevice, parent),
m_listenerParent(listenerParent)
{
}
BluetoothListener *ConsoleBluetoothStarter::createListener()
{
BluetoothListener *rc = new BluetoothListener(m_listenerParent);
rc->setMode(BluetoothListener::Listen);
rc->setPrintConsoleMessages(true);
return rc;
}
bool ConsoleBluetoothStarter::startBluetooth(const TrkDevicePtr &trkDevice,
QObject *listenerParent,
int attempts,
QString *errorMessage)
{
// Set up a console starter to print to stdout.
ConsoleBluetoothStarter starter(trkDevice, listenerParent);
starter.setAttempts(attempts);
switch (starter.start()) {
case Started:
break;
case ConnectionSucceeded:
return true;
case StartError:
*errorMessage = starter.errorString();
return false;
}
// Run the starter with an event loop. @ToDo: Implement
// some asynchronous keypress read to cancel.
QEventLoop eventLoop;
connect(&starter, SIGNAL(connected()), &eventLoop, SLOT(quit()));
connect(&starter, SIGNAL(timeout()), &eventLoop, SLOT(quit()));
eventLoop.exec(QEventLoop::ExcludeUserInputEvents);
if (starter.state() != AbstractBluetoothStarter::Connected) {
*errorMessage = starter.errorString();
return false;
}
return true;
}
} // namespace trk
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