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LibrePilot/ground/openpilotgcs/src/plugins/coreplugin/connectionmanager.cpp

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/**
******************************************************************************
*
* @file connectionmanager.cpp
* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
* Parts by Nokia Corporation (qt-info@nokia.com) Copyright (C) 2009.
* @addtogroup GCSPlugins GCS Plugins
* @{
* @addtogroup CorePlugin Core Plugin
* @{
* @brief The Core GCS plugin
*****************************************************************************/
/*
* 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, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "connectionmanager.h"
#include <aggregation/aggregate.h>
#include <coreplugin/iconnection.h>
#include <extensionsystem/pluginmanager.h>
#include <utils/styledbar.h>
#include "fancytabwidget.h"
#include "fancyactionbar.h"
#include "mainwindow.h"
#include "qextserialport/src/qextserialenumerator.h"
#include "qextserialport/src/qextserialport.h"
#include <QDebug>
#include <QLabel>
#include <QHBoxLayout>
#include <QComboBox>
namespace Core {
ConnectionManager::ConnectionManager(Internal::MainWindow *mainWindow, Internal::FancyTabWidget *modeStack)
: m_availableDevList(0),
m_connectBtn(0),
m_ioDev(NULL)
{
Q_UNUSED(mainWindow);
QVBoxLayout *top = new QVBoxLayout;
top->setSpacing(0);
top->setMargin(0);
QHBoxLayout *layout = new QHBoxLayout;
layout->setSpacing(0);
layout->setContentsMargins(5,0,5,0);
layout->addWidget(new QLabel("Connections: "));
m_availableDevList = new QComboBox;
//m_availableDevList->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
m_availableDevList->setMinimumWidth(100);
m_availableDevList->setMaximumWidth(150);
m_availableDevList->setContextMenuPolicy(Qt::CustomContextMenu);
layout->addWidget(m_availableDevList);
m_connectBtn = new QPushButton("Connect");
m_connectBtn->setEnabled(false);
layout->addWidget(m_connectBtn);
Utils::StyledBar *bar = new Utils::StyledBar;
bar->setLayout(layout);
top->addWidget(bar);
setLayout(top);
modeStack->insertCornerWidget(modeStack->cornerWidgetCount()-1, this);
QObject::connect(m_connectBtn, SIGNAL(pressed()),
this, SLOT(onConnectPressed()));
}
ConnectionManager::~ConnectionManager()
{
}
void ConnectionManager::init()
{
//register to the plugin manager so we can receive
//new connection object from plugins
QObject::connect(ExtensionSystem::PluginManager::instance(), SIGNAL(objectAdded(QObject*)),
this, SLOT(objectAdded(QObject*)));
QObject::connect(ExtensionSystem::PluginManager::instance(), SIGNAL(aboutToRemoveObject(QObject*)),
this, SLOT(aboutToRemoveObject(QObject*)));
}
/**
* Slot called when a plugin added an object to the core pool
*/
void ConnectionManager::objectAdded(QObject *obj)
{
//Check if a plugin added a connection object to the pool
IConnection *connection = Aggregation::query<IConnection>(obj);
if (!connection)
return;
//qDebug() << "Connection object registered:" << connection->connectionName();
//qDebug() << connection->availableDevices();
//register devices and populate CB
devChanged(connection);
// Keep track of the registration to be able to tell plugins
// to do things
m_connectionsList.append(connection);
QObject::connect(connection, SIGNAL(availableDevChanged(IConnection *)),
this, SLOT(devChanged(IConnection*)));
}
void ConnectionManager::aboutToRemoveObject(QObject *obj)
{
//Check if a plugin added a connection object to the pool
IConnection *connection = Aggregation::query<IConnection>(obj);
if (!connection)
return;
if (m_connectionsList.contains(connection))
m_connectionsList.removeAt(m_connectionsList.indexOf(connection));
}
/**
* Method called by plugins who want to force a disconnection. Used
* by Uploader gadget for instance.
*/
bool ConnectionManager::disconnectDevice()
{
// Check if we are currently connected or not
if(!m_ioDev)
return false; // We were not connected
//signal interested plugins that we are disconnecting the device
emit deviceDisconnected();
if(m_connectionDevice.connection)
{
m_connectionDevice.connection->closeDevice(m_connectionDevice.devName);
m_ioDev = NULL;
m_connectionDevice.connection = NULL;
}
m_connectBtn->setText("Connect");
m_availableDevList->setEnabled(true);
return true;
}
/**
* Slot called when the user pressed the connect/disconnect button
*/
void ConnectionManager::onConnectPressed()
{
//check if we are trying to connect a new device
//or if we are disconnecting it
if(!m_ioDev)
{
m_connectionDevice = findDevice(m_availableDevList->currentText());
if(m_connectionDevice.connection)
{
m_ioDev = m_connectionDevice.connection->openDevice(m_connectionDevice.devName);
if(m_ioDev)
{
m_ioDev->open(QIODevice::ReadWrite);
// check if opening the device worked
if (!m_ioDev->isOpen())
{
qDebug() << "could not connect to " << m_connectionDevice.devName;
// TODO: inform the user that something went wrong
m_ioDev = NULL;
return;
}
//signal interested plugins that the user wants to connect to the device
emit deviceConnected(m_ioDev);
m_connectBtn->setText("Disconnect");
m_availableDevList->setEnabled(false);
return;
}
else
{
m_connectionDevice.connection = NULL;
m_ioDev = NULL;
}
}
}
else
{
//only do this if we are disconnecting
//signal interested plugins that user is disconnecting his device
emit deviceDisconnected();
if(m_connectionDevice.connection)
{
m_connectionDevice.connection->closeDevice(m_connectionDevice.devName);
m_ioDev = NULL;
m_connectionDevice.connection = NULL;
}
m_connectBtn->setText("Connect");
m_availableDevList->setEnabled(true);
}
}
/**
* Find a device by its displayed (visible on screen) name
*/
devListItem ConnectionManager::findDevice(const QString &displayedName)
{
foreach(devListItem d, m_devList)
{
if(d.displayedName == displayedName)
{
return d;
}
}
qDebug() << "findDevice: cannot find " << displayedName << " in device list";
devListItem d;
d.connection = NULL;
return d;
}
/**
* Unregister all devices from one connection plugin
* \param[in] connection Connection type that you want to forget about :)
*/
void ConnectionManager::unregisterAll(IConnection *connection)
{
for(QLinkedList<devListItem>::iterator iter = m_devList.begin();
iter != m_devList.end(); )
{
if(iter->connection == connection)
{
iter = m_devList.erase(iter);
}
else
{
++iter;
}
}
}
/**
* Tells every connection plugin to stop polling for devices if they
* are doing that.
*
*/
void ConnectionManager::suspendPolling()
{
foreach (IConnection* cnx, m_connectionsList) {
cnx->suspendPolling();
}
}
/**
* Tells every connection plugin to resume polling for devices if they
* are doing that.
*/
void ConnectionManager::resumePolling()
{
foreach (IConnection* cnx, m_connectionsList) {
cnx->resumePolling();
}
}
/**
* Register a device from a specific connection plugin
*/
void ConnectionManager::registerDevice(IConnection *conn, const QString &devN, const QString &disp)
{
devListItem d;
d.connection = conn;
d.devName = devN;
d.displayedName = disp;
m_devList.append(d);
}
/**
* A device plugin notified us that its device list has changed
* (eg: user plug/unplug a usb device)
* \param[in] connection Connection type which signaled the update
*/
void ConnectionManager::devChanged(IConnection *connection)
{
//clear device list combobox
m_availableDevList->clear();
//remove registered devices of this IConnection from the list
unregisterAll(connection);
//and add them back in the list
QStringList availableDev = connection->availableDevices();
foreach(QString dev, availableDev)
{
QString cbName = connection->shortName() + ": " + dev;
registerDevice(connection, dev, cbName);
}
//add all the list again to the combobox
foreach(devListItem d, m_devList)
{
m_availableDevList->addItem(d.displayedName);
}
//disable connection button if the list is empty
if(m_availableDevList->count() > 0)
m_connectBtn->setEnabled(true);
else
m_connectBtn->setEnabled(false);
}
} //namespace Core