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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 "qextserialport/src/qextserialenumerator.h"
#include "qextserialport/src/qextserialport.h"
#include <QDebug>
#include <QLabel>
#include <QHBoxLayout>
#include <QComboBox>
#include <QEventLoop>
namespace Core {
ConnectionManager::ConnectionManager(Internal::MainWindow *mainWindow, QTabWidget *modeStack) :
QWidget(mainWindow),
m_availableDevList(0),
m_connectBtn(0),
m_ioDev(NULL),
polling(true),
m_mainWindow(mainWindow)
{
QHBoxLayout *layout = new QHBoxLayout;
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layout->setSpacing(5);
layout->setContentsMargins(5,5,5,5);
layout->addWidget(new QLabel(tr("Connections:")));
m_availableDevList = new QComboBox;
m_availableDevList->setMinimumWidth(100);
m_availableDevList->setMaximumWidth(150);
m_availableDevList->setContextMenuPolicy(Qt::CustomContextMenu);
layout->addWidget(m_availableDevList);
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m_connectBtn = new QPushButton(tr("Connect"));
m_connectBtn->setEnabled(false);
layout->addWidget(m_connectBtn);
setLayout(layout);
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modeStack->setCornerWidget(this, Qt::TopRightCorner);
QObject::connect(m_connectBtn, SIGNAL(pressed()), this, SLOT(onConnectPressed()));
}
ConnectionManager::~ConnectionManager()
{
disconnectDevice();
suspendPolling();
}
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*)));
}
/**
* Method called when the user clicks the "Connect" button
*/
bool ConnectionManager::connectDevice(DevListItem device)
{
DevListItem connection_device = findDevice(m_availableDevList->itemData(m_availableDevList->currentIndex(),Qt::ToolTipRole).toString());
if (!connection_device.connection)
return false;
QIODevice *io_dev = connection_device.connection->openDevice(connection_device.device.name);
if (!io_dev)
return false;
io_dev->open(QIODevice::ReadWrite);
// check if opening the device worked
if (!io_dev->isOpen()) {
return false;
}
// we appear to have connected to the device OK
// remember the connection/device details
m_connectionDevice = device;
m_ioDev = io_dev;
connect(m_connectionDevice.connection, SIGNAL(destroyed(QObject *)), this, SLOT(onConnectionDestroyed(QObject *)), Qt::QueuedConnection);
// signal interested plugins that we connected to the device
emit deviceConnected(io_dev);
m_connectBtn->setText("Disconnect");
m_availableDevList->setEnabled(false);
return true;
}
/**
* Method called by plugins who want to force a disconnection.
* Used by Uploader gadget for instance.
*/
bool ConnectionManager::disconnectDevice()
{
if (!m_ioDev) {
// apparently we are already disconnected: this can
// happen if a plugin tries to force a disconnect whereas
// we are not connected. Just return.
return false;
}
// We are connected - disconnect from the device
// signal interested plugins that user is disconnecting his device
emit deviceAboutToDisconnect();
try {
if (m_connectionDevice.connection) {
m_connectionDevice.connection->closeDevice(m_connectionDevice.getConName());
}
} catch (...) { // handle exception
qDebug() << "Exception: m_connectionDevice.connection->closeDevice(" << m_connectionDevice.getConName() << ")";
}
m_connectionDevice.connection = NULL;
m_ioDev = NULL;
emit deviceDisconnected();
m_connectBtn->setText("Connect");
m_availableDevList->setEnabled(true);
return true;
}
/**
* 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;
//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_connectionDevice.connection && m_connectionDevice.connection == connection)
{ // we are currently using the one that is about to be removed
disconnectDevice();
m_connectionDevice.connection = NULL;
m_ioDev = NULL;
}
if (m_connectionsList.contains(connection))
m_connectionsList.removeAt(m_connectionsList.indexOf(connection));
}
void ConnectionManager::onConnectionDestroyed(QObject *obj)
{
Q_UNUSED(obj)
disconnectDevice();
}
/**
* Slot called when the user pressed the connect/disconnect button
*/
void ConnectionManager::onConnectPressed()
{
// Check if we have a ioDev already created:
if (!m_ioDev)
{
// connecting to currently selected device
DevListItem device = findDevice(m_availableDevList->itemData(m_availableDevList->currentIndex(), Qt::ToolTipRole).toString());
if (device.connection)
connectDevice(device);
}
else
{ // disconnecting
disconnectDevice();
}
}
/**
* Find a device by its displayed (visible on screen) name
*/
DevListItem ConnectionManager::findDevice(const QString &devName)
{
foreach (DevListItem d, m_devList)
{
if (d.getConName() == devName)
return d;
}
qDebug() << "findDevice: cannot find " << devName << " in device list";
DevListItem d;
d.connection = NULL;
return d;
}
/**
* Tells every connection plugin to stop polling for devices if they
* are doing that.
*
*/
void ConnectionManager::suspendPolling()
{
foreach (IConnection *cnx, m_connectionsList)
{
cnx->suspendPolling();
}
m_connectBtn->setEnabled(false);
m_availableDevList->setEnabled(false);
polling = false;
}
/**
* Tells every connection plugin to resume polling for devices if they
* are doing that.
*/
void ConnectionManager::resumePolling()
{
foreach (IConnection *cnx, m_connectionsList)
{
cnx->resumePolling();
}
m_connectBtn->setEnabled(true);
m_availableDevList->setEnabled(true);
polling = true;
}
/**
* Synchronize the list of connections displayed with those physically
* present
* @param[in] connection Connection type that you want to forget about :)
*/
void ConnectionManager::updateConnectionList(IConnection *connection)
{
// Get the updated list of devices
QList <IConnection::device> availableDev = connection->availableDevices();
// Go through the list of connections of that type. If they are not in the
// available device list then remove them. If they are connected, then
// disconnect them.
for (QLinkedList<DevListItem>::iterator iter = m_devList.begin(); iter != m_devList.end(); )
{
if (iter->connection != connection) {
++iter;
continue;
}
// See if device exists in the updated availability list
bool found = availableDev.contains(iter->device);
if (!found) {
// we are currently using the one we are about to erase
if (m_connectionDevice.connection && m_connectionDevice.connection == connection && m_connectionDevice.device == iter->device) {
disconnectDevice();
}
iter = m_devList.erase(iter);
} else
++iter;
}
// Add any back to list that don't exist
foreach (IConnection::device dev, availableDev)
{
bool found = m_devList.contains(DevListItem(connection, dev));
if (!found) {
registerDevice(connection,dev);
}
}
}
/**
* Register a device from a specific connection plugin
* @param devN contains the connection shortname + device name which is diplayed in the tooltip
* @param disp is the name that is displayed in the dropdown menu
* @param name is the actual device name
*/
void ConnectionManager::registerDevice(IConnection *conn, IConnection::device device)
{
DevListItem d(conn,device);
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)
{
if(!ExtensionSystem::PluginManager::instance()->allPluginsLoaded())
{
connectionBackup.append(connection);
connect(ExtensionSystem::PluginManager::instance(),SIGNAL(pluginsLoadEnded()),this,SLOT(connectionsCallBack()),Qt::UniqueConnection);
return;
}
//clear device list combobox
m_availableDevList->clear();
//remove registered devices of this IConnection from the list
updateConnectionList(connection);
updateConnectionDropdown();
qDebug() << "# devices " << m_devList.count();
emit availableDevicesChanged(m_devList);
//disable connection button if the liNameif (m_availableDevList->count() > 0)
if (m_availableDevList->count() > 0)
m_connectBtn->setEnabled(true);
else
m_connectBtn->setEnabled(false);
}
void ConnectionManager::updateConnectionDropdown()
{
//add all the list again to the combobox
foreach (DevListItem d, m_devList)
{
m_availableDevList->addItem(d.getConName());
m_availableDevList->setItemData(m_availableDevList->count()-1, d.getConName(), Qt::ToolTipRole);
if(!m_ioDev && d.getConName().startsWith("USB"))
{
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if(m_mainWindow->generalSettings()->autoConnect() || m_mainWindow->generalSettings()->autoSelect())
m_availableDevList->setCurrentIndex(m_availableDevList->count() - 1);
if(m_mainWindow->generalSettings()->autoConnect() && polling)
{
qDebug() << "Automatically opening device";
connectDevice(d);
qDebug()<<"ConnectionManager::devChanged autoconnected USB device";
}
}
}
if(m_ioDev)//if a device is connected make it the one selected on the dropbox
{
for(int x=0; x < m_availableDevList->count(); ++x)
{
if(m_connectionDevice.getConName()==m_availableDevList->itemData(x,Qt::ToolTipRole).toString())
m_availableDevList->setCurrentIndex(x);
}
}
}
void Core::ConnectionManager::connectionsCallBack()
{
foreach(IConnection * con,connectionBackup)
{
devChanged(con);
}
connectionBackup.clear();
disconnect(ExtensionSystem::PluginManager::instance(),SIGNAL(pluginsLoadEnded()),this,SLOT(connectionsCallBack()));
}
} //namespace Core