set app as dock-less background tool

src/MainWindow.cpp

@@ -11,12 +11,15 @@
 #include <QLabel>
 #include <QListWidget>
 #include <QScreen>
+#include <QSystemTrayIcon>
+#include <QMenu>
+#include <QApplication>
 
 MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
 {
     this->setAttribute(Qt::WA_TranslucentBackground, true);
     this->setAttribute(Qt::WA_AcceptTouchEvents, true);
-    this->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
+    this->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::Tool);
     this->resize(QSize(150, 150));
 
     QWidget *centralWidget = new QWidget(this);
@@ -114,6 +117,8 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
     this->move(x, y);
 
     this->setCentralWidget(centralWidget);
+
+    setupTrayIcon();
 }
 
 void MainWindow::resizeEvent(QResizeEvent *event)
@@ -147,6 +152,26 @@ void MainWindow::mouseReleaseEvent(QMouseEvent *event)
     unsetCursor();
 }
 
+void MainWindow::setupTrayIcon()
+{
+    m_trayIcon = new QSystemTrayIcon(this);
+    m_trayIcon->setIcon(QIcon(":/assets/logo.png"));
+    m_trayIcon->setToolTip("llink");
+
+    QMenu *trayMenu = new QMenu(this);
+    trayMenu->addAction("Show", this, &MainWindow::show);
+    trayMenu->addAction("Quit", qApp, &QApplication::quit);
+    m_trayIcon->setContextMenu(trayMenu);
+
+    connect(m_trayIcon, &QSystemTrayIcon::activated, this, [this](QSystemTrayIcon::ActivationReason reason) {
+        if (reason == QSystemTrayIcon::Trigger) {
+            isVisible() ? hide() : show();
+        }
+    });
+
+    m_trayIcon->show();
+}
+
 MainWindow::~MainWindow()
 {
 }