Ubuntu Tray Icon at Start Up (#6889)

* refactored and setup retries

* undoing suggested change, due to older qt on CI

* ensuring a fresh connection for checking tray icon

* cleaning debug messages

* Update ChangeLog

* removed <iostream> unneeded include

* incorporating suggestions

* incorporated SonarCloud suggestions, changed timer

* additional suggestion -applied on legacy base

* added a const version of appConfig

ChangeLog

@@ -1,5 +1,6 @@
 v1.13.1-snapshot
 ===========
+- #6889 Systray Icon on Ubuntu Auto Start (take 2)
 ===========
 
 v1.13.0-stable

src/gui/src/MainWindow.cpp

@@ -19,7 +19,7 @@
 #define DOWNLOAD_URL "http://symless.com/?source=gui"
 #define HELP_URL     "http://symless.com/help?source=gui"
 
-#include <iostream>
+#include <array>
 
 #include "MainWindow.h"
 
@@ -112,8 +112,6 @@ MainWindow::MainWindow (AppConfig& appConfig,
     m_pSynergy(NULL),
     m_SynergyState(synergyDisconnected),
     m_ServerConfig(5, 3, m_AppConfig->screenName(), this),
-    m_pTrayIcon(NULL),
-    m_pTrayIconMenu(NULL),
     m_AlreadyHidden(false),
     m_pMenuBar(NULL),
     m_pMenuFile(NULL),
@@ -228,7 +226,20 @@ MainWindow::~MainWindow()
 
 void MainWindow::open()
 {
-    createTrayIcon();
+    std::array<QAction *, 7> trayMenu = {
+        m_pActionStartSynergy,
+        m_pActionStopSynergy,
+        nullptr,
+        m_pActionMinimize,
+        m_pActionRestore,
+        nullptr,
+        m_pActionQuit
+    };
+
+    m_trayIcon.create(trayMenu, [this](QObject const *o, const char *s) {
+        connect(o, s, this, SLOT(trayActivated(QSystemTrayIcon::ActivationReason)));
+        setIcon(synergyDisconnected);
+    });
 
     if (appConfig().getAutoHide()) {
         hide();
@@ -251,31 +262,6 @@ void MainWindow::setStatus(const QString &status)
     m_pStatusLabel->setText(status);
 }
 
-void MainWindow::createTrayIcon()
-{
-    m_pTrayIconMenu = new QMenu(this);
-
-    m_pTrayIconMenu->addAction(m_pActionStartSynergy);
-    m_pTrayIconMenu->addAction(m_pActionStopSynergy);
-    m_pTrayIconMenu->addSeparator();
-
-    m_pTrayIconMenu->addAction(m_pActionMinimize);
-    m_pTrayIconMenu->addAction(m_pActionRestore);
-    m_pTrayIconMenu->addSeparator();
-    m_pTrayIconMenu->addAction(m_pActionQuit);
-
-    m_pTrayIcon = new QSystemTrayIcon(this);
-    m_pTrayIcon->setContextMenu(m_pTrayIconMenu);
-    m_pTrayIcon->setToolTip("Synergy");
-
-    connect(m_pTrayIcon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
-            this, SLOT(trayActivated(QSystemTrayIcon::ActivationReason)));
-
-    setIcon(synergyDisconnected);
-
-    m_pTrayIcon->show();
-}
-
 void MainWindow::retranslateMenuBar()
 {
     m_pMenuFile->setTitle(tr("&File"));
@@ -366,7 +352,8 @@ void MainWindow::zeroConfToggled() {
     updateAutoConfigWidgets();
 #endif
 }
-void MainWindow::setIcon(qSynergyState state)
+
+void MainWindow::setIcon(qSynergyState state) const
 {
     QIcon icon;
 
@@ -379,8 +366,7 @@ void MainWindow::setIcon(qSynergyState state)
     icon.addFile(synergyDefaultIconFiles[state]);
 #endif
 
-    if (m_pTrayIcon)
-        m_pTrayIcon->setIcon(icon);
+    m_trayIcon.set(icon);
 }
 
 void MainWindow::trayActivated(QSystemTrayIcon::ActivationReason reason)
@@ -847,7 +833,7 @@ QString MainWindow::configFilename()
     return filename;
 }
 
-QString MainWindow::address()
+QString MainWindow::address() const
 {
     QString i = appConfig().networkInterface();
     return (!i.isEmpty() ? i : "") + ":" + QString::number(appConfig().port());

src/gui/src/MainWindow.h

@@ -23,6 +23,7 @@
 #include <QSettings>
 #include <QProcess>
 #include <QThread>
+#include <QMutex>
 
 #include "ui_MainWindowBase.h"
 
@@ -34,7 +35,7 @@
 #include "ActivationDialog.h"
 #include "ConfigWriter.h"
 
-#include <QMutex>
+#include "TrayIcon.h"
 
 class QAction;
 class QMenu;
@@ -108,7 +109,7 @@ class MainWindow : public QMainWindow, public Ui::MainWindowBase
         int synergyState() const { return m_SynergyState; }
         QString hostname() const { return m_pLineEditHostname->text(); }
         QString configFilename();
-        QString address();
+        QString address() const;
         QString appPath(const QString& name);
         void open();
         void clearLog();
@@ -166,6 +167,7 @@ public slots:
         // TODO This should be properly using the ConfigWriter system.
         QSettings& settings() { return GUI::Config::ConfigWriter::make()->settings(); }
         AppConfig& appConfig() { return *m_AppConfig; }
+        AppConfig const& appConfig() const { return *m_AppConfig; }
         QProcess* synergyProcess() { return m_pSynergy; }
         void setSynergyProcess(QProcess* p) { m_pSynergy = p; }
         void initConnections();
@@ -173,7 +175,7 @@ public slots:
         void createStatusBar();
         void createTrayIcon();
         void loadSettings();
-        void setIcon(qSynergyState state);
+        void setIcon(qSynergyState state) const;
         void setSynergyState(qSynergyState state);
         bool checkForApp(int which, QString& app);
         bool clientArgs(QStringList& args, QString& app);
@@ -221,8 +223,6 @@ public slots:
         QProcess*           m_pSynergy;
         int                 m_SynergyState;
         ServerConfig        m_ServerConfig;
-        QSystemTrayIcon*    m_pTrayIcon;
-        QMenu*              m_pTrayIconMenu;
         bool                m_AlreadyHidden;
         VersionChecker      m_VersionChecker;
         IpcClient           m_IpcClient;
@@ -232,6 +232,7 @@ public slots:
         QMenu*              m_pMenuWindow;
         QMenu*              m_pMenuHelp;
         QAbstractButton*    m_pCancelButton;
+        TrayIcon            m_trayIcon;
         qRuningState        m_ExpectedRunningState;
         QMutex              m_StopDesktopMutex;
         SslCertificate*     m_pSslCertificate;

src/gui/src/ScreenSetupView.h

@@ -43,14 +43,14 @@ class ScreenSetupView : public QTableView
         ScreenSetupModel* model() const;
 
     protected:
-        void mouseDoubleClickEvent(QMouseEvent*);
+        void mouseDoubleClickEvent(QMouseEvent*) override;
         void setTableSize();
-        void resizeEvent(QResizeEvent*);
-        void dragEnterEvent(QDragEnterEvent* event);
-        void dragMoveEvent(QDragMoveEvent* event);
-        void startDrag(Qt::DropActions supportedActions);
-        QStyleOptionViewItem viewOptions() const;
-        void scrollTo(const QModelIndex&, ScrollHint) {}
+        void resizeEvent(QResizeEvent*) override;
+        void dragEnterEvent(QDragEnterEvent* event) override;
+        void dragMoveEvent(QDragMoveEvent* event) override;
+        void startDrag(Qt::DropActions supportedActions) override;
+        QStyleOptionViewItem viewOptions() const override;
+        void scrollTo(const QModelIndex&, ScrollHint) override {}
 };
 
 #endif

src/gui/src/TrayIcon.cpp

@@ -0,0 +1,19 @@
+#include "TrayIcon.h"
+
+void TrayIcon::tryCreate() const
+{
+    QSystemTrayIcon trayIcon; // by creating a new tray icon, we actually make the DBus implementation refresh the connection (DBus)
+    trayIcon.hide(); // we ony hide it in order for the compiler to not optimise-out the object (make some use of it)
+    if (QSystemTrayIcon::isSystemTrayAvailable()) { // this ends up calling the underlying DBus connection (on DBus)
+        m_pTrayIcon->show();
+        m_connector(m_pTrayIcon.get(), SIGNAL(activated(QSystemTrayIcon::ActivationReason)));
+    }
+    else {
+        QTimer::singleShot(2500, this, &TrayIcon::tryCreate);
+    }
+}
+
+void TrayIcon::set(const QIcon& icon) const
+{
+    m_pTrayIcon->setIcon(icon);
+}

src/gui/src/TrayIcon.h

@@ -0,0 +1,45 @@
+#pragma once
+#include <QObject>
+#include <QTimer>
+#include <QSystemTrayIcon>
+#include <QMenu>
+#include <functional>
+#include <memory>
+
+class TrayIcon : public QObject
+{
+    Q_OBJECT
+public:
+    using TConnector = std::function<void(QObject const *, const char *)>;
+
+    template<typename TActionContainer>
+    void create(TActionContainer const &actionContainer, TConnector const &connector) 
+    {
+        m_connector = connector;
+        m_pTrayIconMenu = std::make_unique<QMenu>();
+
+        for (auto action: actionContainer) {
+            if (action) {
+                m_pTrayIconMenu->addAction(action);
+            }
+            else {
+                m_pTrayIconMenu->addSeparator();
+            }
+        }
+
+        m_pTrayIcon = std::make_unique<QSystemTrayIcon>();
+        m_pTrayIcon->setContextMenu(m_pTrayIconMenu.get());
+        m_pTrayIcon->setToolTip("Synergy");
+
+        tryCreate();
+    }
+
+    void tryCreate() const;
+
+    void set(const QIcon& icon) const;
+
+private:
+    std::unique_ptr<QSystemTrayIcon>    m_pTrayIcon {};
+    std::unique_ptr<QMenu>              m_pTrayIconMenu {};
+    TConnector                          m_connector;
+};