Fixed issue #378 - Don't show empty floating containers on startup

demo/MainWindow.cpp

@@ -466,6 +466,15 @@ void MainWindowPrivate::createContent()
     Action = ui.menuTests->addAction(QString("Raise %1").arg(DockWidget->windowTitle()));
     DockWidget->connect(Action, SIGNAL(triggered()), SLOT(raise()));
 
+    // Test hidden floating dock widget
+    DockWidget = createLongTextLabelDockWidget();
+    DockManager->addDockWidgetFloating(DockWidget);
+    DockWidget->toggleView(false);
+
+    // Test visible floating dock widget
+    DockWidget = createCalendarDockWidget();
+    DockManager->addDockWidgetFloating(DockWidget);
+
 
 #ifdef Q_OS_WIN
 #if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))

src/DockContainerWidget.cpp

@@ -1625,6 +1625,21 @@ QList<CDockAreaWidget*> CDockContainerWidget::openedDockAreas() const
 }
 
 
+//============================================================================
+bool CDockContainerWidget::hasOpenDockAreas() const
+{
+	for (auto DockArea : d->DockAreas)
+	{
+		if (!DockArea->isHidden())
+		{
+			return true;
+		}
+	}
+
+	return false;
+}
+
+
 //============================================================================
 void CDockContainerWidget::saveState(QXmlStreamWriter& s) const
 {

src/DockContainerWidget.h

@@ -216,6 +216,13 @@ public:
 	 */
 	QList<CDockAreaWidget*> openedDockAreas() const;
 
+	/**
+	 * This function returns true, if the container has open dock areas.
+	 * This functions is a little bit faster than calling openedDockAreas().isEmpty()
+	 * because it returns as soon as it finds an open dock area
+	 */
+	bool hasOpenDockAreas() const;
+
     /**
      * This function returns true if this dock area has only one single
      * visible dock widget.

src/DockManager.cpp

@@ -762,7 +762,12 @@ void CDockManager::showEvent(QShowEvent *event)
 
 	for (auto FloatingWidget : d->UninitializedFloatingWidgets)
 	{
-		FloatingWidget->show();
+		// Check, if someone closed a floating dock widget before the dock
+		// manager is shown
+		if (FloatingWidget->dockContainer()->hasOpenDockAreas())
+		{
+			FloatingWidget->show();
+		}
 	}
 	d->UninitializedFloatingWidgets.clear();
 }