feat(ui): add update notification enabled with -DUPDATE_CHECK

Fix #5335

.travis/build-ubuntu-14-04.sh

@@ -180,7 +180,7 @@ build_qtox() {
     rm -rf "$BUILDDIR"
 
     echo '*** BUILDING "FULL" VERSION ***'
-    cmake -H. -B"$BUILDDIR"
+    cmake -H. -B"$BUILDDIR" -DUPDATE_CHECK=ON
     bdir
 }
 

CMakeLists.txt

@@ -11,6 +11,7 @@ option(PLATFORM_EXTENSIONS "Enable platform specific extensions, requires extra
 option(USE_FILTERAUDIO "Enable the echo canceling backend" ON)
 # AUTOUPDATE is currently broken and thus disabled
 option(AUTOUPDATE "Enable the auto updater" OFF)
+option(UPDATE_CHECK "Enable automatic update check" ON)
 option(USE_CCACHE "Use ccache when available" ON)
 option(SPELL_CHECK "Enable spell cheching support" ON)
 option(ASAN "Compile with AddressSanitizer" OFF)
@@ -632,6 +633,16 @@ if(${AUTOUPDATE} AND (WIN32 OR APPLE))
     message(STATUS "using autoupdater")
 endif()
 
+if(${UPDATE_CHECK})
+    add_definitions(-DUPDATE_CHECK_ENABLED=1)
+    set(${PROJECT_NAME}_SOURCES ${${PROJECT_NAME}_SOURCES}
+        src/net/updatecheck.cpp
+        src/net/updatecheck.h)
+    message(STATUS "using update check")
+else()
+    message(STATUS "NOT using update check")
+endif()
+
 if (MINGW)
   STRING(TOLOWER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE_LOWER)
   if (CMAKE_BUILD_TYPE_LOWER MATCHES debug)

appimage/build.sh

@@ -117,7 +117,7 @@ cd build
 export PKG_CONFIG_PATH=/deps/lib/pkgconfig/
 
 cmake .. -DCMAKE_BUILD_TYPE=RelWithDebInfo -DBUILD_TESTING=ON \
--DAPPIMAGEKIT_PACKAGE_DEBS=ON
+-DAPPIMAGEKIT_PACKAGE_DEBS=ON -DUPDATE_CHECK=ON
 
 make
 make install

osx/qTox-Mac-Deployer-ULTIMATE.sh

@@ -234,7 +234,7 @@ build() {
     fcho "Now working in ${PWD}"
     fcho "Starting cmake ..."
     export CMAKE_PREFIX_PATH=$(brew --prefix qt5)
-    cmake -H$QTOX_DIR -B.
+    cmake -H$QTOX_DIR -B. -DUPDATE_CHECK=ON
     make -j$(sysctl -n hw.ncpu)
 }
 

src/main.cpp

@@ -104,6 +104,9 @@ void logMessageHandler(QtMsgType type, const QMessageLogContext& ctxt, const QSt
     case QtDebugMsg:
         LogMsg += "Debug";
         break;
+    case QtInfoMsg:
+        LogMsg += "Info";
+        break;
     case QtWarningMsg:
         LogMsg += "Warning";
         break;

src/net/updatecheck.cpp

@@ -0,0 +1,94 @@
+/*
+    Copyright © 2014-2018 by The qTox Project Contributors
+
+    This file is part of qTox, a Qt-based graphical interface for Tox.
+
+    qTox is libre 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.
+
+    qTox 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 qTox.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "src/net/updatecheck.h"
+#include "src/persistence/settings.h"
+
+#include <QNetworkAccessManager>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QRegularExpression>
+#include <QNetworkReply>
+#include <QObject>
+#include <QTimer>
+#include <QDebug>
+#include <cassert>
+
+namespace {
+    const QString versionUrl{QStringLiteral("https://api.github.com/repos/qTox/qTox/releases/latest")};
+} // namespace
+
+UpdateCheck::UpdateCheck(const Settings& settings)
+    : settings(settings)
+{
+    updateTimer.start(1000 * 60 * 60 * 24 /* 1 day */);
+    connect(&updateTimer, &QTimer::timeout, this, &UpdateCheck::checkForUpdate);
+    connect(&manager, &QNetworkAccessManager::finished, this, &UpdateCheck::handleResponse);
+}
+
+void UpdateCheck::checkForUpdate()
+{
+    if (!settings.getCheckUpdates()) {
+        // still run the timer to check periodically incase setting changes
+        return;
+    }
+    manager.setProxy(settings.getProxy());
+    QNetworkRequest request{versionUrl};
+    manager.get(request);
+}
+
+void UpdateCheck::handleResponse(QNetworkReply *reply)
+{
+    assert(reply != nullptr);
+    if (reply == nullptr) {
+        qWarning() << "Update check returned null reply, ignoring";
+        return;
+    }
+
+    if (reply->error() != QNetworkReply::NoError) {
+        qWarning() << "Failed to check for update:" << reply->error();
+        emit updateCheckFailed();
+        reply->deleteLater();
+        return;
+    }
+    QByteArray result = reply->readAll();
+    QJsonDocument doc = QJsonDocument::fromJson(result);
+    QJsonObject jObject = doc.object();
+    QVariantMap mainMap = jObject.toVariantMap();
+    QString latestVersion = mainMap["tag_name"].toString();
+    if (latestVersion.isEmpty()) {
+        qWarning() << "No tag name found in response:";
+        emit updateCheckFailed();
+        reply->deleteLater();
+        return;
+    }
+
+    // capture tag name to avoid showing update available on dev builds which include hash as part of describe
+    QRegularExpression versionFormat{QStringLiteral("v[0-9]+.[0-9]+.[0-9]+")};
+    QString curVer = versionFormat.match(GIT_DESCRIBE).captured(0);
+    if (latestVersion != curVer) {
+        qInfo() << "Update available to version" << latestVersion;
+        QUrl link{mainMap["html_url"].toString()};
+        emit updateAvailable(latestVersion, link);
+    }
+    else {
+        qInfo() << "qTox is up to date";
+        emit upToDate();
+    }
+    reply->deleteLater();
+}

src/net/updatecheck.h

@@ -0,0 +1,49 @@
+/*
+    Copyright © 2014-2018 by The qTox Project Contributors
+
+    This file is part of qTox, a Qt-based graphical interface for Tox.
+
+    qTox is libre 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.
+
+    qTox 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 qTox.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <QObject>
+#include <QNetworkAccessManager>
+#include <QTimer>
+
+#include <memory>
+
+class Settings;
+class QString;
+class QUrl;
+class QNetworkReply;
+class UpdateCheck : public QObject
+{
+    Q_OBJECT
+
+public:
+    UpdateCheck(const Settings& settings);
+    void checkForUpdate();
+
+signals:
+    void updateAvailable(QString latestVersion, QUrl link);
+    void upToDate();
+    void updateCheckFailed();
+
+private slots:
+    void handleResponse(QNetworkReply *reply);
+
+private:
+    QNetworkAccessManager manager;
+    QTimer updateTimer;
+    const Settings& settings;
+};

src/widget/form/chatform.cpp

@@ -69,53 +69,55 @@ static constexpr int TYPING_NOTIFICATION_DURATION = 3000;
 
 const QString ChatForm::ACTION_PREFIX = QStringLiteral("/me ");
 
-QString statusToString(const Status status)
+namespace
 {
-    QString result;
+    QString statusToString(const Status status)
-    switch (status) {
+    {
-    case Status::Online:
+        QString result;
-        result = ChatForm::tr("online", "contact status");
+        switch (status) {
-        break;
+        case Status::Online:
-    case Status::Away:
+            result = ChatForm::tr("online", "contact status");
-        result = ChatForm::tr("away", "contact status");
+            break;
-        break;
+        case Status::Away:
-    case Status::Busy:
+            result = ChatForm::tr("away", "contact status");
-        result = ChatForm::tr("busy", "contact status");
+            break;
-        break;
+        case Status::Busy:
-    case Status::Offline:
+            result = ChatForm::tr("busy", "contact status");
-        result = ChatForm::tr("offline", "contact status");
+            break;
-        break;
+        case Status::Offline:
-    }
+            result = ChatForm::tr("offline", "contact status");
-    return result;
+            break;
-}
+        }
-
+        return result;
-QString secondsToDHMS(quint32 duration)
-{
-    QString res;
-    QString cD = ChatForm::tr("Call duration: ");
-    quint32 seconds = duration % 60;
-    duration /= 60;
-    quint32 minutes = duration % 60;
-    duration /= 60;
-    quint32 hours = duration % 24;
-    quint32 days = duration / 24;
-
-    // I assume no one will ever have call longer than a month
-    if (days) {
-        return cD + res.sprintf("%dd%02dh %02dm %02ds", days, hours, minutes, seconds);
     }
 
-    if (hours) {
+    QString secondsToDHMS(quint32 duration)
-        return cD + res.sprintf("%02dh %02dm %02ds", hours, minutes, seconds);
+    {
+        QString res;
+        QString cD = ChatForm::tr("Call duration: ");
+        quint32 seconds = duration % 60;
+        duration /= 60;
+        quint32 minutes = duration % 60;
+        duration /= 60;
+        quint32 hours = duration % 24;
+        quint32 days = duration / 24;
+
+        // I assume no one will ever have call longer than a month
+        if (days) {
+            return cD + res.sprintf("%dd%02dh %02dm %02ds", days, hours, minutes, seconds);
+        }
+
+        if (hours) {
+            return cD + res.sprintf("%02dh %02dm %02ds", hours, minutes, seconds);
+        }
+
+        if (minutes) {
+            return cD + res.sprintf("%02dm %02ds", minutes, seconds);
+        }
+
+        return cD + res.sprintf("%02ds", seconds);
     }
-
+} // namespace
-    if (minutes) {
-        return cD + res.sprintf("%02dm %02ds", minutes, seconds);
-    }
-
-    return cD + res.sprintf("%02ds", seconds);
-}
-
 
 ChatForm::ChatForm(Friend* chatFriend, History* history)
     : GenericChatForm(chatFriend)

src/widget/form/settings/aboutform.cpp

@@ -20,13 +20,29 @@
 #include "aboutform.h"
 #include "ui_aboutsettings.h"
 
-#include <QDebug>
+#include "src/widget/tool/recursivesignalblocker.h"
-#include <QTimer>
+#include "src/net/autoupdate.h"
+#include "src/net/updatecheck.h"
+#include "src/widget/translator.h"
+#include "src/persistence/profile.h"
+#include "src/persistence/settings.h"
+
 #include <tox/tox.h>
 
-#include "src/net/autoupdate.h"
+#include <QDebug>
-#include "src/widget/tool/recursivesignalblocker.h"
+#include <QDesktopServices> 
-#include "src/widget/translator.h"
+#include <QPushButton>
+#include <QTimer>
+
+#include <memory>
+
+// index of UI in the QStackedWidget
+enum class updateIndex
+{
+    available = 0,
+    upToDate = 1,
+    failed = 2
+};
 
 /**
  * @class AboutForm
@@ -38,10 +54,11 @@
 /**
  * @brief Constructor of AboutForm.
  */
-AboutForm::AboutForm()
+AboutForm::AboutForm(UpdateCheck* updateCheck)
     : GenericForm(QPixmap(":/img/settings/general.png"))
     , bodyUI(new Ui::AboutSettings)
     , progressTimer(new QTimer(this))
+    , updateCheck(updateCheck)
 {
     bodyUI->setupUi(this);
 
@@ -84,6 +101,18 @@ void AboutForm::replaceVersions()
 
     bodyUI->youAreUsing->setText(tr("You are using qTox version %1.").arg(QString(GIT_DESCRIBE)));
 
+#if UPDATE_CHECK_ENABLED && !AUTOUPDATE_ENABLED
+    if (updateCheck != nullptr) {
+        connect(updateCheck, &UpdateCheck::updateAvailable, this, &AboutForm::onUpdateAvailable);
+        connect(updateCheck, &UpdateCheck::upToDate, this, &AboutForm::onUpToDate);
+        connect(updateCheck, &UpdateCheck::updateCheckFailed, this, &AboutForm::onUpdateCheckFailed);
+    } else {
+        qWarning() << "AboutForm passed null UpdateCheck!";
+    }
+#else
+    qDebug() << "AboutForm not showing updates, qTox built without UPDATE_CHECK";
+#endif
+
     QString commitLink = "https://github.com/qTox/qTox/commit/" + QString(GIT_VERSION);
     bodyUI->gitVersion->setText(
         tr("Commit hash: %1").arg(createLink(commitLink, QString(GIT_VERSION))));
@@ -146,6 +175,25 @@ void AboutForm::replaceVersions()
     bodyUI->authorInfo->setText(authorInfo);
 }
 
+void AboutForm::onUpdateAvailable(QString latestVersion, QUrl link)
+{
+    QObject::disconnect(linkConnection);
+    linkConnection = connect(bodyUI->updateAvailableButton, &QPushButton::clicked, [link](){
+        QDesktopServices::openUrl(link);
+    });
+    bodyUI->updateStack->setCurrentIndex(static_cast<int>(updateIndex::available));
+}
+
+void AboutForm::onUpToDate()
+{
+    bodyUI->updateStack->setCurrentIndex(static_cast<int>(updateIndex::upToDate));
+}
+
+void AboutForm::onUpdateCheckFailed()
+{
+    bodyUI->updateStack->setCurrentIndex(static_cast<int>(updateIndex::failed));
+}
+
 /**
  * @brief Creates hyperlink with specific style.
  * @param path The URL of the page the link goes to.

src/widget/form/settings/aboutform.h

@@ -22,9 +22,12 @@
 
 #include "genericsettings.h"
 
+#include <memory>
 class Core;
 class QTimer;
 class QString;
+class UpdateCheck;
+class QLayoutItem;
 
 namespace Ui {
 class AboutSettings;
@@ -34,13 +37,18 @@ class AboutForm : public GenericForm
 {
     Q_OBJECT
 public:
-    AboutForm();
+    AboutForm(UpdateCheck* updateCheck);
     ~AboutForm();
     virtual QString getFormName() final override
     {
         return tr("About");
     }
 
+public slots:
+    void onUpdateAvailable(QString latestVersion, QUrl link);
+    void onUpToDate();
+    void onUpdateCheckFailed();
+
 protected:
 private slots:
     void showUpdateProgress();
@@ -55,6 +63,8 @@ private:
 private:
     Ui::AboutSettings* bodyUI;
     QTimer* progressTimer;
+    UpdateCheck* updateCheck;
+    QMetaObject::Connection linkConnection;
 };
 
 #endif // ABOUTFORM_H

src/widget/form/settings/aboutsettings.ui

@@ -175,6 +175,89 @@
             </property>
            </widget>
           </item>
+          <item row="0" column="1">
+           <widget class="QStackedWidget" name="updateStack">
+            <property name="currentIndex">
+             <number>2</number>
+            </property>
+            <widget class="QWidget" name="updateAvailablePage">
+             <layout class="QHBoxLayout" name="horizontalLayout_6">
+              <item>
+               <layout class="QHBoxLayout" name="updateAvailableLayout">
+                <item>
+                 <spacer name="updateAvailableSpacer">
+                  <property name="orientation">
+                   <enum>Qt::Horizontal</enum>
+                  </property>
+                  <property name="sizeHint" stdset="0">
+                   <size>
+                    <width>0</width>
+                    <height>0</height>
+                   </size>
+                  </property>
+                 </spacer>
+                </item>
+                <item>
+                 <widget class="QPushButton" name="updateAvailableButton">
+                  <property name="accessibleDescription">
+                   <string>Open update download link</string>
+                  </property>
+                  <property name="text">
+                   <string>Update available</string>
+                  </property>
+                 </widget>
+                </item>
+               </layout>
+              </item>
+             </layout>
+            </widget>
+            <widget class="QWidget" name="upToDatePage">
+             <layout class="QHBoxLayout" name="horizontalLayout_5">
+              <item>
+               <layout class="QHBoxLayout" name="upToDateLayout">
+                <item>
+                 <spacer name="upToDateSpacer">
+                  <property name="orientation">
+                   <enum>Qt::Horizontal</enum>
+                  </property>
+                  <property name="sizeHint" stdset="0">
+                   <size>
+                    <width>40</width>
+                    <height>20</height>
+                   </size>
+                  </property>
+                 </spacer>
+                </item>
+                <item>
+                 <widget class="QLabel" name="upToDateLabel">
+                  <property name="sizePolicy">
+                   <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+                    <horstretch>0</horstretch>
+                    <verstretch>0</verstretch>
+                   </sizepolicy>
+                  </property>
+                  <property name="text">
+                   <string>qTox is up to date ✓</string>
+                  </property>
+                 </widget>
+                </item>
+               </layout>
+              </item>
+             </layout>
+            </widget>
+            <widget class="QWidget" name="blankPage">
+             <layout class="QHBoxLayout" name="horizontalLayout">
+              <item>
+               <spacer name="blankPageFiller">
+                <property name="orientation">
+                 <enum>Qt::Horizontal</enum>
+                </property>
+               </spacer>
+              </item>
+             </layout>
+            </widget>
+           </widget>
+          </item>
          </layout>
         </widget>
        </item>

src/widget/form/settings/generalform.cpp

@@ -100,9 +100,7 @@ GeneralForm::GeneralForm(SettingsWidget* myParent)
 
     Settings& s = Settings::getInstance();
 
-#ifdef AUTOUPDATE_ENABLED
+#if !defined(AUTOUPDATE_ENABLED) &&  !defined(UPDATE_CHECK_ENABLED)
-    bodyUI->checkUpdates->setVisible(AUTOUPDATE_ENABLED);
-#else
     bodyUI->checkUpdates->setVisible(false);
 #endif
 

src/widget/form/settings/generalsettings.ui

@@ -111,7 +111,7 @@
             <item>
              <widget class="QCheckBox" name="checkUpdates">
               <property name="text">
-               <string>Check for updates on startup</string>
+               <string>Check for updates</string>
               </property>
              </widget>
             </item>

src/widget/form/settingswidget.cpp

@@ -22,6 +22,7 @@
 #include "src/audio/audio.h"
 #include "src/core/coreav.h"
 #include "src/core/core.h"
+#include "src/net/updatecheck.h"
 #include "src/persistence/settings.h"
 #include "src/video/camerasource.h"
 #include "src/widget/contentlayout.h"
@@ -40,7 +41,7 @@
 
 #include <memory>
 
-SettingsWidget::SettingsWidget(QWidget* parent)
+SettingsWidget::SettingsWidget(UpdateCheck* updateCheck, QWidget* parent)
     : QWidget(parent, Qt::Window)
 {
     Audio* audio = &Audio::getInstance();
@@ -63,7 +64,15 @@ SettingsWidget::SettingsWidget(QWidget* parent)
     AVForm* rawAvfrm = new AVForm(audio, coreAV, camera, audioSettings, videoSettings);
     std::unique_ptr<AVForm> avfrm(rawAvfrm);
     std::unique_ptr<AdvancedForm> expfrm(new AdvancedForm());
-    std::unique_ptr<AboutForm> abtfrm(new AboutForm());
+    std::unique_ptr<AboutForm> abtfrm(new AboutForm(updateCheck));
+
+#if UPDATE_CHECK_ENABLED && !AUTOUPDATE_ENABLED
+    if (updateCheck != nullptr) {
+        connect(updateCheck, &UpdateCheck::updateAvailable, this, &SettingsWidget::onUpdateAvailable);
+    } else {
+        qWarning() << "SettingsWidget passed null UpdateCheck!";
+    }
+#endif
 
     cfgForms = {{std::move(gfrm), std::move(uifrm), std::move(pfrm), std::move(avfrm), std::move(expfrm), std::move(abtfrm)}};
     for (auto& cfgForm : cfgForms)
@@ -111,6 +120,13 @@ void SettingsWidget::onTabChanged(int index)
     settingsWidgets->setCurrentIndex(index);
 }
 
+void SettingsWidget::onUpdateAvailable(void)
+{
+    settingsWidgets->tabBar()->setProperty("update-available", true);
+    settingsWidgets->tabBar()->style()->unpolish(settingsWidgets->tabBar());
+    settingsWidgets->tabBar()->style()->polish(settingsWidgets->tabBar());
+}
+
 void SettingsWidget::retranslateUi()
 {
     for (size_t i = 0; i < cfgForms.size(); ++i)

src/widget/form/settingswidget.h

@@ -35,12 +35,13 @@ class AVForm;
 class QLabel;
 class QTabWidget;
 class ContentLayout;
+class UpdateCheck;
 
 class SettingsWidget : public QWidget
 {
     Q_OBJECT
 public:
-    explicit SettingsWidget(QWidget* parent = nullptr);
+    SettingsWidget(UpdateCheck* updateCheck, QWidget* parent = nullptr);
     ~SettingsWidget();
 
     bool isShown() const;
@@ -49,6 +50,9 @@ public:
 
     void showAbout();
 
+public slots:
+    void onUpdateAvailable(void);
+
 private slots:
     void onTabChanged(int);
 

src/widget/widget.cpp

@@ -61,6 +61,7 @@
 #include "src/model/groupinvite.h"
 #include "src/model/profile/profileinfo.h"
 #include "src/net/autoupdate.h"
+#include "src/net/updatecheck.h"
 #include "src/nexus.h"
 #include "src/persistence/offlinemsgengine.h"
 #include "src/persistence/profile.h"
@@ -232,6 +233,14 @@ void Widget::init()
     filesForm = new FilesForm();
     addFriendForm = new AddFriendForm;
     groupInviteForm = new GroupInviteForm;
+#if UPDATE_CHECK_ENABLED
+    updateCheck = std::unique_ptr<UpdateCheck>(new UpdateCheck(Settings::getInstance()));
+    connect(updateCheck.get(), &UpdateCheck::updateAvailable, this, &Widget::onUpdateAvailable);
+#endif
+    settingsWidget = new SettingsWidget(updateCheck.get(), this);
+#if UPDATE_CHECK_ENABLED 
+    updateCheck->checkForUpdate();
+#endif
 
     Core* core = Nexus::getCore();
     Profile* profile = Nexus::getProfile();
@@ -848,10 +857,6 @@ void Widget::onIconClick(QSystemTrayIcon::ActivationReason reason)
 
 void Widget::onShowSettings()
 {
-    if (!settingsWidget) {
-        settingsWidget = new SettingsWidget(this);
-    }
-
     if (Settings::getInstance().getSeparateWindow()) {
         if (!settingsWidget->isShown()) {
             settingsWidget->show(createContentDialog(DialogType::SettingDialog));
@@ -1589,6 +1594,13 @@ void Widget::toggleFullscreen()
     }
 }
 
+void Widget::onUpdateAvailable(QString /*latestVersion*/, QUrl /*link*/)
+{
+    ui->settingsButton->setProperty("update-available", true);
+    ui->settingsButton->style()->unpolish(ui->settingsButton);
+    ui->settingsButton->style()->polish(ui->settingsButton);
+}
+
 ContentDialog* Widget::createContentDialog() const
 {
     ContentDialog* contentDialog = new ContentDialog();

src/widget/widget.h

@@ -69,6 +69,7 @@ class QTimer;
 class SettingsWidget;
 class SystemTrayIcon;
 class VideoSurface;
+class UpdateCheck;
 
 class Widget final : public QMainWindow
 {
@@ -183,6 +184,7 @@ public slots:
     void onGroupDialogShown(Group* g);
     void toggleFullscreen();
     void refreshPeerListsLocal(const QString &username);
+    void onUpdateAvailable(QString latestVersion, QUrl link);
 
 signals:
     void friendRequestAccepted(const ToxPk& friendPk);
@@ -288,6 +290,7 @@ private:
     ProfileForm* profileForm;
 
     QPointer<SettingsWidget> settingsWidget;
+    std::unique_ptr<UpdateCheck> updateCheck; // ownership should be moved outside Widget once non-singleton
     FilesForm* filesForm;
     static Widget* instance;
     GenericChatroomWidget* activeChatroomWidget;

themes/default/settings/mainContent.css

@@ -105,6 +105,17 @@ QScrollBar:vertical
     margin-bottom: 2px;
 }
 
+/* using last is a bit of a hack, but QTabBar otherwise doesn't allow selecting single tabs */
+QTabBar::tab:last:!selected[update-available=true]
+{
+    background-color: #80c580;
+}
+
+QPushButton#updateAvailableButton
+{
+    background-color: #21da21;
+}
+
 QScrollBar::handle:vertical
 {
     background-color: #d1d1d1;

themes/default/tooliconsZone/tooliconsZone.css

@@ -1,3 +1,15 @@
+QPushButton[update-available=true]
+{
+    background-color: #115508;
+    border: none;
+}
+
+QPushButton:hover[update-available=true]
+{
+    background-color: #2b9e1c;
+    border: none;
+}
+
 QPushButton
 {
     background-color: @themeDark;

windows/cross-compile/build.sh

@@ -1130,12 +1130,14 @@ then
   cmake -DCMAKE_TOOLCHAIN_FILE=./toolchain.cmake \
         -DCMAKE_BUILD_TYPE=Release \
         -DSPELL_CHECK=OFF \
+        -DUPDATE_CHECK=ON \
         ..
 elif [[ "$BUILD_TYPE" == "debug" ]]
 then
   cmake -DCMAKE_TOOLCHAIN_FILE=./toolchain.cmake \
         -DCMAKE_BUILD_TYPE=Debug \
         -DSPELL_CHECK=OFF \
+        -DUPDATE_CHECK=ON \
         ..
 fi