QGCToolBar.cc 23.8 KB
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/*=====================================================================

QGroundControl Open Source Ground Control Station

(c) 2009 - 2011 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>

This file is part of the QGROUNDCONTROL project

    QGROUNDCONTROL 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.

    QGROUNDCONTROL 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 QGROUNDCONTROL. If not, see <http://www.gnu.org/licenses/>.

======================================================================*/

#include <QToolButton>
#include <QLabel>
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#include <QSpacerItem>
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#include "QGCToolBar.h"
#include "UASManager.h"
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#include "MainWindow.h"
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QGCToolBar::QGCToolBar(QWidget *parent) :
    QToolBar(parent),
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    mav(NULL),
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    player(NULL),
    changed(true),
    batteryPercent(0),
    batteryVoltage(0),
    wpId(0),
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    wpDistance(0),
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    systemArmed(false),
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    currentLink(NULL),
    firstAction(NULL)
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{
    setObjectName("QGC_TOOLBAR");
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    // Do not load UI, wait for actions
}
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void QGCToolBar::heartbeatTimeout(bool timeout, unsigned int ms)
{
    // set timeout label visible
    if (timeout)
    {
        // Alternate colors to increase visibility
        if ((ms / 1000) % 2 == 0)
        {
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            toolBarTimeoutLabel->setStyleSheet(QString("QLabel { margin: 3px 2px; font: 14px; color: %1; background-color: %2; border-radius: 4px;}").arg(QGC::colorDarkWhite.name()).arg(QGC::colorMagenta.name()));
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        }
        else
        {
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            toolBarTimeoutLabel->setStyleSheet(QString("QLabel { margin: 3px 2px; font: 14px; color: %1; background-color: %2; border-radius: 4px;}").arg(QGC::colorDarkWhite.name()).arg(QGC::colorMagenta.dark(250).name()));
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        }
        toolBarTimeoutLabel->setText(tr("CONNECTION LOST: %1 s").arg((ms / 1000.0f), 2, 'f', 1, ' '));
    }
    else
    {
        // Check if loss text is present, reset once
        if (toolBarTimeoutLabel->text() != "")
        {
            toolBarTimeoutLabel->setText("");
            toolBarTimeoutLabel->setStyleSheet(QString(""));
        }
    }
}
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void QGCToolBar::createUI()
{
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    setStyleSheet("QToolBar {margin: 0px; border-bottom: 1px solid #484848; border-top: 1px solid #969696; background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:0, y2:1, stop:0 #8B8B8B, stop:0.3 #808080, stop:0.34 #747474, stop:1 #484848);}");
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    // CREATE TOOLBAR ITEMS
    // Add internal actions
    // Add MAV widget
    symbolButton = new QToolButton(this);
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    symbolButton->setStyleSheet("QWidget { margin-left: 10px; background-color: #050508; color: #DDDDDF; background-clip: border; }");
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    addWidget(symbolButton);
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    toolBarNameLabel = new QLabel("------", this);
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    toolBarNameLabel->setToolTip(tr("Currently controlled vehicle"));
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    toolBarNameLabel->setAlignment(Qt::AlignCenter);
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    addWidget(toolBarNameLabel);

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    toolBarTimeoutLabel = new QLabel("UNCONNECTED", this);
    toolBarTimeoutLabel->setToolTip(tr("System timed out, interval since last message"));
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    toolBarTimeoutLabel->setStyleSheet(QString("QLabel { margin: 3px 2px; font: 14px; color: %1; background-color: %2; border-radius: 4px;}").arg(QGC::colorDarkWhite.name()).arg(QGC::colorMagenta.name()));
    toolBarTimeoutLabel->setAlignment(Qt::AlignCenter);
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    addWidget(toolBarTimeoutLabel);

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    toolBarSafetyLabel = new QLabel("SAFE", this);
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    toolBarSafetyLabel->setStyleSheet("QLabel { margin: 3px 2px; font: 14px; color: #14C814; }");
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    toolBarSafetyLabel->setToolTip(tr("Vehicle safety state"));
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    toolBarSafetyLabel->setAlignment(Qt::AlignCenter);
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    addWidget(toolBarSafetyLabel);

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    toolBarModeLabel = new QLabel("------", this);
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    toolBarModeLabel->setStyleSheet("QLabel { margin: 3px 2px; font: 14px; color: #ACEBFE; }");
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    toolBarModeLabel->setToolTip(tr("Vehicle mode"));
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    toolBarModeLabel->setAlignment(Qt::AlignCenter);
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    addWidget(toolBarModeLabel);

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    toolBarStateLabel = new QLabel("------", this);
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    toolBarStateLabel->setStyleSheet("QLabel { margin: 3px 2px; font: 14px; color: #FEC654; }");
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    toolBarStateLabel->setToolTip(tr("Vehicle state"));
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    toolBarStateLabel->setAlignment(Qt::AlignCenter);
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    addWidget(toolBarStateLabel);

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    toolBarBatteryBar = new QProgressBar(this);
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    toolBarBatteryBar->setStyleSheet("QProgressBar:horizontal { margin: 0px 4px 0px 0px; border: 1px solid #4A4A4F; border-radius: 4px; text-align: center; padding: 2px; color: #111111; background-color: #111118; height: 14px; } QProgressBar:horizontal QLabel { font-size: 9px; color: #111111; } QProgressBar::chunk { background-color: green; }");
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    toolBarBatteryBar->setMinimum(0);
    toolBarBatteryBar->setMaximum(100);
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    toolBarBatteryBar->setMinimumWidth(20);
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    toolBarBatteryBar->setMaximumWidth(100);
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    toolBarBatteryBar->setValue(0);
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    toolBarBatteryBar->setToolTip(tr("Battery charge level"));
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    addWidget(toolBarBatteryBar);

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    toolBarBatteryVoltageLabel = new QLabel("xx.x V");
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    toolBarBatteryVoltageLabel->setStyleSheet(QString("QLabel { margin: 0px 0px 0px 4px; font: 14px; color: %1; }").arg(QColor(Qt::green).name()));
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    toolBarBatteryVoltageLabel->setToolTip(tr("Battery voltage"));
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    toolBarBatteryVoltageLabel->setAlignment(Qt::AlignCenter);
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    addWidget(toolBarBatteryVoltageLabel);
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    toolBarWpLabel = new QLabel("WP--", this);
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    toolBarWpLabel->setStyleSheet("QLabel { margin: 3px 2px; font: 18px; color: #ACEBFE; }");
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    toolBarWpLabel->setToolTip(tr("Current waypoint"));
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    toolBarWpLabel->setAlignment(Qt::AlignCenter);
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    addWidget(toolBarWpLabel);
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    toolBarDistLabel = new QLabel("--- ---- m", this);
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    toolBarDistLabel->setToolTip(tr("Distance to current waypoint"));
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    toolBarDistLabel->setAlignment(Qt::AlignCenter);
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    addWidget(toolBarDistLabel);
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    toolBarMessageLabel = new QLabel("", this);
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    toolBarMessageLabel->setStyleSheet("QLabel { margin: 3px 2px; font: 14px; color: #ACEBFE; }");
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    toolBarMessageLabel->setToolTip(tr("Most recent system message"));
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    addWidget(toolBarMessageLabel);
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    QWidget* spacer = new QWidget();
    spacer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
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    spacer->setStyleSheet("* { margin: 0px; background-color: transparent; min-height: 24px}");
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    addWidget(spacer);

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    connectButton = new QPushButton(tr("Connect"), this);
    connectButton->setToolTip(tr("Connect wireless link to MAV"));
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    connectButton->setCheckable(true);
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    connectButton->setStyleSheet("QPushButton {min-height: 20px; color: #222222; background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #5AAA49, stop: 1 #106B38);  margin-left: 4px; margin-right: 4px; border-radius: 4px; border: 1px solid #085B35; } QPushButton:checked { background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #FF9000, stop: 1 #FFD450); color: #222222; border-color: #D1892A}");
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    addWidget(connectButton);
    connect(connectButton, SIGNAL(clicked(bool)), this, SLOT(connectLink(bool)));

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    // DONE INITIALIZING BUTTONS

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    // Configure the toolbar for the current default UAS
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    setActiveUAS(UASManager::instance()->getActiveUAS());
    connect(UASManager::instance(), SIGNAL(activeUASSet(UASInterface*)), this, SLOT(setActiveUAS(UASInterface*)));
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    if (LinkManager::instance()->getLinks().count() > 2)
        addLink(LinkManager::instance()->getLinks().last());
    // XXX implies that connect button is always active for the last used link
    connect(LinkManager::instance(), SIGNAL(newLink(LinkInterface*)), this, SLOT(addLink(LinkInterface*)));

    // Update label if required
    if (LinkManager::instance()->getLinks().count() < 3) {
        connectButton->setText(tr("New Link"));
    }

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    // Set the toolbar to be updated every 2s
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    connect(&updateViewTimer, SIGNAL(timeout()), this, SLOT(updateView()));
    updateViewTimer.start(2000);
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    loadSettings();
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    changed = false;
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}

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void QGCToolBar::setPerspectiveChangeActions(const QList<QAction*> &actions)
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{
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    if (actions.count() > 1)
    {
        QButtonGroup* group = new QButtonGroup(this);
        group->setExclusive(true);

        QToolButton *first = new QToolButton(this);
        // Add first button
        first->setIcon(actions.first()->icon());
        first->setText(actions.first()->text());
        first->setToolTip(actions.first()->toolTip());
        first->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
        first->setCheckable(true);
        connect(first, SIGNAL(clicked(bool)), actions.first(), SIGNAL(triggered(bool)));
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        first->setStyleSheet("QToolButton { min-width: 70px; color: #222222; background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #A2A3A4, stop: 1 #B6B7B8); margin-left: 8px; margin-right: 0px; border-radius: 0px; border : 0px solid blue; border-bottom-left-radius: 6px; border-top-left-radius: 6px; border-left: 1px solid #484848; border-top: 1px solid #484848; border-bottom: 1px solid #484848; } QToolButton:checked { background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #555555, stop: 1 #787878); color: #DDDDDD; }");
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        addWidget(first);
        group->addButton(first);

        for (int i = 1; i < actions.count() - 1; i++)
        {
            // Add last button
            QToolButton *btn = new QToolButton(this);
            // Add first button
            btn->setIcon(actions.at(i)->icon());
            btn->setText(actions.at(i)->text());
            btn->setToolTip(actions.at(i)->toolTip());
            btn->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
            btn->setCheckable(true);
            connect(btn, SIGNAL(clicked(bool)), actions.at(i), SIGNAL(triggered(bool)));
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            btn->setStyleSheet("QToolButton { min-width: 70px; color: #222222; background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #A2A3A4, stop: 1 #B6B7B8);  margin-left: -2px; margin-right: -2px; padding-left: 0px; padding-right: 0px; border-radius: 0px; border-top: 1px solid #484848; border-bottom: 1px solid #484848; } QToolButton:checked { background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #555555, stop: 1 #787878); color: #DDDDDD; }");
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            addWidget(btn);
            group->addButton(btn);
        }

        // Add last button
        QToolButton *last = new QToolButton(this);
        // Add first button
        last->setIcon(actions.last()->icon());
        last->setText(actions.last()->text());
        last->setToolTip(actions.last()->toolTip());
        last->setCheckable(true);
        connect(last, SIGNAL(clicked(bool)), actions.last(), SIGNAL(triggered(bool)));
        last->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
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        last->setStyleSheet("QToolButton { min-width: 70px; color: #222222; background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #A2A3A4, stop: 1 #B6B7B8);  margin-left: 0px; margin-right: 8px; padding-left: 0px; padding-right: 0px; border-radius: 0px; border : 0px solid blue; border-bottom-right-radius: 6px; border-top-right-radius: 6px; border-right: 1px solid #484848; border-top: 1px solid #484848; border-bottom: 1px solid #484848; } QToolButton:checked { background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #555555, stop: 1 #787878); color: #DDDDDD; }");
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        addWidget(last);
        group->addButton(last);
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    } else {
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        qDebug() << __FILE__ << __LINE__ << "Not enough perspective change actions provided";
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    }
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    // Add the "rest"
    createUI();
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}

void QGCToolBar::setActiveUAS(UASInterface* active)
{
    // Do nothing if system is the same or NULL
    if ((active == NULL) || mav == active) return;

    if (mav)
    {
        // Disconnect old system
        disconnect(mav, SIGNAL(statusChanged(UASInterface*,QString,QString)), this, SLOT(updateState(UASInterface*,QString,QString)));
        disconnect(mav, SIGNAL(modeChanged(int,QString,QString)), this, SLOT(updateMode(int,QString,QString)));
        disconnect(mav, SIGNAL(nameChanged(QString)), this, SLOT(updateName(QString)));
        disconnect(mav, SIGNAL(systemTypeSet(UASInterface*,uint)), this, SLOT(setSystemType(UASInterface*,uint)));
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        disconnect(mav, SIGNAL(textMessageReceived(int,int,int,QString)), this, SLOT(receiveTextMessage(int,int,int,QString)));
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        disconnect(mav, SIGNAL(batteryChanged(UASInterface*,double,double,int)), this, SLOT(updateBatteryRemaining(UASInterface*,double,double,int)));
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        disconnect(mav, SIGNAL(armingChanged(bool)), this, SLOT(updateArmingState(bool)));
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        disconnect(mav, SIGNAL(heartbeatTimeout(bool, unsigned int)), this, SLOT(heartbeatTimeout(bool,unsigned int)));
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        if (mav->getWaypointManager())
        {
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            disconnect(mav->getWaypointManager(), SIGNAL(currentWaypointChanged(quint16)), this, SLOT(updateCurrentWaypoint(quint16)));
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            disconnect(mav->getWaypointManager(), SIGNAL(waypointDistanceChanged(double)), this, SLOT(updateWaypointDistance(double)));
        }
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    }

    // Connect new system
    mav = active;
    connect(active, SIGNAL(statusChanged(UASInterface*,QString,QString)), this, SLOT(updateState(UASInterface*, QString,QString)));
    connect(active, SIGNAL(modeChanged(int,QString,QString)), this, SLOT(updateMode(int,QString,QString)));
    connect(active, SIGNAL(nameChanged(QString)), this, SLOT(updateName(QString)));
    connect(active, SIGNAL(systemTypeSet(UASInterface*,uint)), this, SLOT(setSystemType(UASInterface*,uint)));
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    connect(active, SIGNAL(textMessageReceived(int,int,int,QString)), this, SLOT(receiveTextMessage(int,int,int,QString)));
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    connect(active, SIGNAL(batteryChanged(UASInterface*,double,double,int)), this, SLOT(updateBatteryRemaining(UASInterface*,double,double,int)));
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    connect(active, SIGNAL(armingChanged(bool)), this, SLOT(updateArmingState(bool)));
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    connect(active, SIGNAL(heartbeatTimeout(bool, unsigned int)), this, SLOT(heartbeatTimeout(bool,unsigned int)));
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    if (active->getWaypointManager())
    {
        connect(active->getWaypointManager(), SIGNAL(currentWaypointChanged(quint16)), this, SLOT(updateCurrentWaypoint(quint16)));
        connect(active->getWaypointManager(), SIGNAL(waypointDistanceChanged(double)), this, SLOT(updateWaypointDistance(double)));
    }
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    // Update all values once
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    systemName = mav->getUASName();
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    systemArmed = mav->isArmed();
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    toolBarNameLabel->setText(mav->getUASName());
    toolBarNameLabel->setStyleSheet(QString("QLabel { font: bold 16px; color: %1; }").arg(mav->getColor().name()));
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    symbolButton->setStyleSheet(QString("QWidget { background-color: %1; color: #DDDDDF; background-clip: border; } QToolButton { font-weight: bold; font-size: 14px; border: 0px solid #484848; border-radius: 5px; min-width:22px; max-width: 22px; min-height: 22px; max-height: 22px; padding: 0px; margin: 0px 4px 0px 20px; background-color: none; }").arg(mav->getColor().name()));
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    toolBarModeLabel->setText(mav->getShortMode());
    toolBarStateLabel->setText(mav->getShortState());
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    toolBarTimeoutLabel->setStyleSheet(QString(""));
    toolBarTimeoutLabel->setText("");
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    setSystemType(mav, mav->getSystemType());
}

void QGCToolBar::createCustomWidgets()
{

}

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void QGCToolBar::updateArmingState(bool armed)
{
    systemArmed = armed;
    changed = true;
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    /* important, immediately update */
    updateView();
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}

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void QGCToolBar::updateView()
{
    if (!changed) return;
    toolBarDistLabel->setText(tr("%1 m").arg(wpDistance, 6, 'f', 2, '0'));
    toolBarWpLabel->setText(tr("WP%1").arg(wpId));
    toolBarBatteryBar->setValue(batteryPercent);
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    if (batteryPercent < 30 && toolBarBatteryBar->value() >= 30) {
        toolBarBatteryBar->setStyleSheet("QProgressBar:horizontal { margin: 0px 4px 0px 0px; border: 1px solid #4A4A4F; border-radius: 4px; text-align: center; padding: 2px; color: #111111; background-color: #111118; height: 14px; } QProgressBar:horizontal QLabel { font-size: 9px; color: #111111; } QProgressBar::chunk { background-color: yellow; }");
    } else if (batteryPercent >= 30 && toolBarBatteryBar->value() < 30){
        toolBarBatteryBar->setStyleSheet("QProgressBar:horizontal { margin: 0px 4px 0px 0px; border: 1px solid #4A4A4F; border-radius: 4px; text-align: center; padding: 2px; color: #111111; background-color: #111118; height: 14px; } QProgressBar:horizontal QLabel { font-size: 9px; color: #111111; } QProgressBar::chunk { background-color: green; }");
    }

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    toolBarBatteryVoltageLabel->setText(tr("%1 V").arg(batteryVoltage, 4, 'f', 1, ' '));
    toolBarStateLabel->setText(tr("%1").arg(state));
    toolBarModeLabel->setText(tr("%1").arg(mode));
    toolBarNameLabel->setText(systemName);
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    // expire after 15 seconds
    if (QGC::groundTimeMilliseconds() - lastSystemMessageTimeMs < 15000) {
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        toolBarMessageLabel->setText(tr("%1").arg(lastSystemMessage));
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    } else {
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        toolBarMessageLabel->setText(tr("%1").arg(""));
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    }
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    if (systemArmed)
    {
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        toolBarSafetyLabel->setStyleSheet(QString("QLabel { margin: 3px 2px; font: 14px; color: %1; background-color: %2; border-radius: 4px;}").arg(QGC::colorRed.name()).arg(QGC::colorYellow.name()));
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        toolBarSafetyLabel->setText(tr("ARMED"));
    }
    else
    {
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        toolBarSafetyLabel->setStyleSheet("QLabel { margin: 3px 2px; font: 14px; color: #14C814; }");
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        toolBarSafetyLabel->setText(tr("SAFE"));
    }

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    changed = false;
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}

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void QGCToolBar::updateWaypointDistance(double distance)
{
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    if (wpDistance != distance) changed = true;
    wpDistance = distance;
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}

void QGCToolBar::updateCurrentWaypoint(quint16 id)
{
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    if (wpId != id) changed = true;
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    wpId = id;
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}

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void QGCToolBar::updateBatteryRemaining(UASInterface* uas, double voltage, double percent, int seconds)
{
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    Q_UNUSED(uas);
    Q_UNUSED(seconds);
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    if (batteryPercent != percent || batteryVoltage != voltage) changed = true;
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    batteryPercent = percent;
    batteryVoltage = voltage;
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}

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void QGCToolBar::updateState(UASInterface* system, QString name, QString description)
{
    Q_UNUSED(system);
    Q_UNUSED(description);
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    if (state != name) changed = true;
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    state = name;
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    /* important, immediately update */
    updateView();
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}

void QGCToolBar::updateMode(int system, QString name, QString description)
{
    Q_UNUSED(system);
    Q_UNUSED(description);
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    if (mode != name) changed = true;
    mode = name;
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    /* important, immediately update */
    updateView();
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}

void QGCToolBar::updateName(const QString& name)
{
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    if (systemName != name)
    {
        changed = true;
    }
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    systemName = name;
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}

/**
 * The current system type is represented through the system icon.
 *
 * @param uas Source system, has to be the same as this->uas
 * @param systemType type ID, following the MAVLink system type conventions
 * @see http://pixhawk.ethz.ch/software/mavlink
 */
void QGCToolBar::setSystemType(UASInterface* uas, unsigned int systemType)
{
    Q_UNUSED(uas);
        // Set matching icon
        switch (systemType) {
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        case MAV_TYPE_GENERIC:
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            symbolButton->setIcon(QIcon(":/files/images/mavs/generic.svg"));
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            break;
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        case MAV_TYPE_FIXED_WING:
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            symbolButton->setIcon(QIcon(":/files/images/mavs/fixed-wing.svg"));
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            break;
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        case MAV_TYPE_QUADROTOR:
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            symbolButton->setIcon(QIcon(":/files/images/mavs/quadrotor.svg"));
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            break;
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        case MAV_TYPE_COAXIAL:
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            symbolButton->setIcon(QIcon(":/files/images/mavs/coaxial.svg"));
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            break;
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        case MAV_TYPE_HELICOPTER:
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            symbolButton->setIcon(QIcon(":/files/images/mavs/helicopter.svg"));
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            break;
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        case MAV_TYPE_ANTENNA_TRACKER:
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            symbolButton->setIcon(QIcon(":/files/images/mavs/antenna-tracker.svg"));
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            break;
        case MAV_TYPE_GCS:
            symbolButton->setIcon(QIcon(":files/images/mavs/groundstation.svg"));
            break;
        case MAV_TYPE_AIRSHIP:
            symbolButton->setIcon(QIcon(":files/images/mavs/airship.svg"));
            break;
        case MAV_TYPE_FREE_BALLOON:
            symbolButton->setIcon(QIcon(":files/images/mavs/free-balloon.svg"));
            break;
        case MAV_TYPE_ROCKET:
            symbolButton->setIcon(QIcon(":files/images/mavs/rocket.svg"));
            break;
        case MAV_TYPE_GROUND_ROVER:
            symbolButton->setIcon(QIcon(":files/images/mavs/ground-rover.svg"));
            break;
        case MAV_TYPE_SURFACE_BOAT:
            symbolButton->setIcon(QIcon(":files/images/mavs/surface-boat.svg"));
            break;
        case MAV_TYPE_SUBMARINE:
            symbolButton->setIcon(QIcon(":files/images/mavs/submarine.svg"));
            break;
        case MAV_TYPE_HEXAROTOR:
            symbolButton->setIcon(QIcon(":files/images/mavs/hexarotor.svg"));
            break;
        case MAV_TYPE_OCTOROTOR:
            symbolButton->setIcon(QIcon(":files/images/mavs/octorotor.svg"));
            break;
        case MAV_TYPE_TRICOPTER:
            symbolButton->setIcon(QIcon(":files/images/mavs/tricopter.svg"));
            break;
        case MAV_TYPE_FLAPPING_WING:
            symbolButton->setIcon(QIcon(":files/images/mavs/flapping-wing.svg"));
            break;
        case MAV_TYPE_KITE:
            symbolButton->setIcon(QIcon(":files/images/mavs/kite.svg"));
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            break;
        default:
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            symbolButton->setIcon(QIcon(":/files/images/mavs/unknown.svg"));
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            break;
        }
}

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void QGCToolBar::receiveTextMessage(int uasid, int componentid, int severity, QString text)
{
    Q_UNUSED(uasid);
    Q_UNUSED(componentid);
    Q_UNUSED(severity);
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    if (lastSystemMessage != text) changed = true;
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    lastSystemMessage = text;
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    lastSystemMessageTimeMs = QGC::groundTimeMilliseconds();
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}

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void QGCToolBar::addLink(LinkInterface* link)
{
    // XXX magic number
    if (LinkManager::instance()->getLinks().count() > 2) {
        currentLink = link;
        connect(currentLink, SIGNAL(connected(bool)), this, SLOT(updateLinkState(bool)));
        updateLinkState(link->isConnected());
    }
}

void QGCToolBar::removeLink(LinkInterface* link)
{
    if (link == currentLink) {
        currentLink = NULL;
        // XXX magic number
        if (LinkManager::instance()->getLinks().count() > 2) {
            currentLink = LinkManager::instance()->getLinks().last();
            updateLinkState(currentLink->isConnected());
        } else {
            connectButton->setText(tr("New Link"));
        }
    }
}

void QGCToolBar::updateLinkState(bool connected)
{
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    Q_UNUSED(connected);
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    if (currentLink && currentLink->isConnected())
    {
        connectButton->setText(tr("Disconnect"));
        connectButton->blockSignals(true);
        connectButton->setChecked(true);
        connectButton->blockSignals(false);
    }
    else
    {
        connectButton->setText(tr("Connect"));
        connectButton->blockSignals(true);
        connectButton->setChecked(false);
        connectButton->blockSignals(false);
    }
}

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void QGCToolBar::connectLink(bool connect)
{
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    // No serial port yet present
    // XXX magic number
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    if (connect && LinkManager::instance()->getLinks().count() < 3)
    {
        MainWindow::instance()->addLink();
    } else if (connect) {
        LinkManager::instance()->getLinks().last()->connect();
    } else if (!connect && LinkManager::instance()->getLinks().count() > 2) {
        LinkManager::instance()->getLinks().last()->disconnect();
    }
}

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void QGCToolBar::loadSettings()
{
    QSettings settings;
    settings.beginGroup("QGC_TOOLBAR");
    settings.endGroup();
}

void QGCToolBar::storeSettings()
{
    QSettings settings;
    settings.beginGroup("QGC_TOOLBAR");
    settings.endGroup();
    settings.sync();
}

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void QGCToolBar::clearStatusString()
{
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    if (toolBarMessageLabel->text().length() > 0)
    {
        lastSystemMessage = "";
        changed = true;
    }
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}

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QGCToolBar::~QGCToolBar()
{
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    storeSettings();
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}