added automatic title bar orientation for the commandline

This moves the title bar to the side when docked at the bottom or top
(to save space).
The title is changed to prevent overlap with the undock / close buttons.

librecad/src/main/qc_applicationwindow.cpp

@@ -2877,3 +2877,28 @@ void QC_ApplicationWindow::widgetOptionsDialog()
     }
     settings.endGroup();
 }
+
+/**
+ * This slot modifies the commandline's title bar
+ * depending on the dock area it is moved to.
+ */
+void QC_ApplicationWindow::modifyCommandTitleBar(Qt::DockWidgetArea area)
+{
+    QDockWidget* cmd_dockwidget = findChild<QDockWidget*>("command_dockwidget");
+
+    if (area == Qt::BottomDockWidgetArea || area == Qt::TopDockWidgetArea)
+    {
+        cmd_dockwidget->setWindowTitle("Cmd");
+        cmd_dockwidget->setFeatures(QDockWidget::DockWidgetClosable
+                                   |QDockWidget::DockWidgetMovable
+                                   |QDockWidget::DockWidgetFloatable
+                                   |QDockWidget::DockWidgetVerticalTitleBar);
+    }
+    else
+    {
+        cmd_dockwidget->setWindowTitle(tr("Command line"));
+        cmd_dockwidget->setFeatures(QDockWidget::DockWidgetClosable
+                                   |QDockWidget::DockWidgetMovable
+                                   |QDockWidget::DockWidgetFloatable);
+    }
+}

librecad/src/main/qc_applicationwindow.h

@@ -180,6 +180,8 @@ public slots:
 
     void widgetOptionsDialog();
 
+    void modifyCommandTitleBar(Qt::DockWidgetArea area);
+
 signals:
     void gridChanged(bool on);
     void draftChanged(bool on);

librecad/src/ui/lc_widgetfactory.cpp

@@ -310,6 +310,9 @@ void LC_WidgetFactory::createRightSidebar(QG_ActionHandler* action_handler)
     connect(command_widget->leCommand, SIGNAL(escape()), main_window, SLOT(setFocus()));
     dock_command->setWidget(command_widget);
 
+    connect(dock_command, SIGNAL(dockLocationChanged(Qt::DockWidgetArea)),
+            main_window, SLOT(modifyCommandTitleBar(Qt::DockWidgetArea)));
+
     main_window->addDockWidget(Qt::RightDockWidgetArea, dock_library);
     main_window->tabifyDockWidget(dock_library, dock_block);
     main_window->tabifyDockWidget(dock_block, dock_layer);