Fixed #527 - updateDockWidgetFocusStyle() function error

src/DockWidgetTab.cpp

@@ -79,6 +79,7 @@ struct DockWidgetTabPrivate
 	QSpacerItem* IconTextSpacer;
 	QPoint TabDragStartPosition;
 	QSize IconSize;
+	bool MousePressed = false;
 
 	/**
 	 * Private data constructor
@@ -372,10 +373,12 @@ void CDockWidgetTab::mousePressEvent(QMouseEvent* ev)
 	if (ev->button() == Qt::LeftButton)
 	{
 		ev->accept();
+		d->MousePressed = true;
         d->saveDragStartMousePosition(internal::globalPositionOf(ev));
         d->DragState = DraggingMousePressed;
         if (CDockManager::testConfigFlag(CDockManager::FocusHighlighting))
         {
+        	d->focusController()->setDockWidgetTabPressed(true);
         	d->focusController()->setDockWidgetTabFocused(this);
         }
         Q_EMIT clicked();
@@ -391,6 +394,7 @@ void CDockWidgetTab::mouseReleaseEvent(QMouseEvent* ev)
 {
 	if (ev->button() == Qt::LeftButton)
 	{
+		d->MousePressed = false;
 		auto CurrentDragState = d->DragState;
 		d->GlobalDragStartMousePosition = QPoint();
 		d->DragStartMousePosition = QPoint();
@@ -412,7 +416,9 @@ void CDockWidgetTab::mouseReleaseEvent(QMouseEvent* ev)
 			 d->FloatingWidget->finishDragging();
 			 break;
 
-		default:; // do nothing
+		default:
+			d->focusController()->setDockWidgetTabPressed(false);
+			break; // do nothing
 		}
 	} 
 	else if (ev->button() == Qt::MiddleButton)
@@ -802,6 +808,7 @@ void CDockWidgetTab::setIconSize(const QSize& Size)
 	d->IconSize = Size;
 	d->updateIcon();
 }
+
 } // namespace ads
 //---------------------------------------------------------------------------
 // EOF DockWidgetTab.cpp