feat: allow dragging frameless window

src/MainWindow.cpp

@@ -12,6 +12,7 @@
 #include <QItemSelectionModel>
 #include <QLabel>
 #include <QMenu>
+#include <QMouseEvent>
 #include <QRandomGenerator>
 #include <QSystemTrayIcon>
 #include <QTimer>
@@ -19,13 +20,16 @@
 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent), m_trayIcon(nullptr), m_authManager(new AuthManager(this)), m_settingsDialog(nullptr),
       m_authDialog(nullptr), m_data(nullptr), m_networkStreamModel(nullptr), m_particleListModel(nullptr),
-      m_selectedParticleRow(-1)
+      m_selectedParticleRow(-1), m_isDragging(false)
 {
   m_authDialog = new AuthDialog(m_authManager, this);
 
   ui = new Ui::MainWindow;
   ui->setupUi(this);
-  // this->setWindowFlags(Qt::FramelessWindowHint);
+
+  // Enable frameless window for edge-to-edge experience
+  setWindowFlags(Qt::FramelessWindowHint | Qt::Window);
+  setAttribute(Qt::WA_TranslucentBackground, false);
 
   // Style for grey status bar text
   QString statusBarLabelStyle = "QLabel { color: #808080; }";
@@ -359,3 +363,40 @@ void MainWindow::updatePingIndicator()
 
   m_pingLabel->setText("connected " + QString::number(currentPing) + "ms");
 }
+
+void MainWindow::mousePressEvent(QMouseEvent *event)
+{
+  if (event->button() == Qt::LeftButton)
+  {
+    // Check if the click is within the top bar widget area
+    QWidget *topBar = ui->widget; // The top bar widget from the UI
+    if (topBar && topBar->geometry().contains(event->pos()))
+    {
+      m_isDragging = true;
+      m_dragPosition = event->globalPosition().toPoint() - frameGeometry().topLeft();
+      event->accept();
+      return;
+    }
+  }
+  QMainWindow::mousePressEvent(event);
+}
+
+void MainWindow::mouseMoveEvent(QMouseEvent *event)
+{
+  if (m_isDragging && (event->buttons() & Qt::LeftButton))
+  {
+    move(event->globalPosition().toPoint() - m_dragPosition);
+    event->accept();
+    return;
+  }
+  QMainWindow::mouseMoveEvent(event);
+}
+
+void MainWindow::mouseReleaseEvent(QMouseEvent *event)
+{
+  if (event->button() == Qt::LeftButton)
+  {
+    m_isDragging = false;
+  }
+  QMainWindow::mouseReleaseEvent(event);
+}

src/MainWindow.h

@@ -42,6 +42,11 @@ private slots:
   void onTreeSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected);
   void onParticleSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected);
 
+protected:
+  void mousePressEvent(QMouseEvent *event) override;
+  void mouseMoveEvent(QMouseEvent *event) override;
+  void mouseReleaseEvent(QMouseEvent *event) override;
+
 private:
   void setupTrayIcon();
   void setupModels();
@@ -70,6 +75,10 @@ private:
   QLabel *m_storageLabel;
   QLabel *m_pingLabel;
   QTimer *m_pingTimer;
+
+  // Window dragging
+  QPoint m_dragPosition;
+  bool m_isDragging;
 };
 
 #endif // LLINK_MAINWINDOW_H