[TabListButton] Show popup menu inside window for tab-list button in tabbar

src/lib/tools/toolbutton.cpp

@@ -58,6 +58,18 @@ void ToolButton::setIcon(const QIcon &image)
     QToolButton::setIcon(image);
 }
 
+void ToolButton::setMenu(QMenu* m)
+{
+    if (m) {
+        connect(m, SIGNAL(aboutToHide()), this, SLOT(menuAboutToHide()));
+    }
+    else if (menu()) {
+        disconnect(menu(), SIGNAL(aboutToHide()), this, SLOT(menuAboutToHide()));
+    }
+
+    QToolButton::setMenu(m);
+}
+
 void ToolButton::setShowMenuInside(bool inside)
 {
     m_showMenuInside = inside;
@@ -173,6 +185,8 @@ void ToolButton::showMenu()
         return;
     }
 
+    m->popup(QPoint(0, 0));
+
     QPoint pos = mapToGlobal(rect().bottomRight());
     if (QApplication::layoutDirection() == Qt::RightToLeft) {
         pos.setX(pos.x() - rect().width());
@@ -181,8 +195,11 @@ void ToolButton::showMenu()
         pos.setX(pos.x() - m->sizeHint().width());
     }
 
-    setDown(true);
+    m->move(pos);
-    m->exec(pos);
+}
+
+void ToolButton::menuAboutToHide()
+{
     setDown(false);
 }
 

src/lib/tools/toolbutton.h

@@ -50,6 +50,8 @@ public:
     void setFallbackIcon(const QIcon &image);
     void setIcon(const QIcon &image);
 
+    void setMenu(QMenu* m);
+
     void setShowMenuInside(bool inside);
     bool showMenuInside() const;
 
@@ -65,6 +67,9 @@ signals:
 public slots:
     void showMenu();
 
+private slots:
+    void menuAboutToHide();
+
 protected:
     void mousePressEvent(QMouseEvent* e);
     void mouseReleaseEvent(QMouseEvent* e);

src/lib/webview/tabwidget.cpp

@@ -149,6 +149,7 @@ TabWidget::TabWidget(QupZilla* mainClass, QWidget* parent)
     m_buttonListTabs->setToolTip(tr("List of tabs"));
     m_buttonListTabs->setAutoRaise(true);
     m_buttonListTabs->setFocusPolicy(Qt::NoFocus);
+    m_buttonListTabs->setShowMenuInside(true);
 
     m_buttonAddTab = new AddTabButton(this, m_tabBar);
 
@@ -164,6 +165,7 @@ TabWidget::TabWidget(QupZilla* mainClass, QWidget* parent)
     m_buttonListTabs2->setToolTip(tr("List of tabs"));
     m_buttonListTabs2->setAutoRaise(true);
     m_buttonListTabs2->setFocusPolicy(Qt::NoFocus);
+    m_buttonListTabs2->setShowMenuInside(true);
 
     m_buttonAddTab2 = new AddTabButton(this, m_tabBar);
     m_buttonAddTab2->setProperty("outside-tabbar", true);