Only close tab if the user clicked and released the mouse on the same tab.

common/lc_mainwindow.cpp

@@ -30,24 +30,28 @@
 lcMainWindow* gMainWindow;
 #define LC_TAB_LAYOUT_VERSION 0x0001
 
-void lcTabBar::mouseReleaseEvent(QMouseEvent *event)
+void lcTabBar::mousePressEvent(QMouseEvent* Event)
 {
-	if (event->type() == QEvent::MouseButtonRelease && event->button() == Qt::MidButton)
-		tabCloseRequested(tabAt(event->pos()));
+	if (Event->button() == Qt::MidButton)
+		mMousePressTab = tabAt(Event->pos());
 	else
-		QTabBar::mouseReleaseEvent(event);
+		QTabBar::mousePressEvent(Event);
+}
+
+void lcTabBar::mouseReleaseEvent(QMouseEvent* Event)
+{
+	if (Event->button() == Qt::MidButton && tabAt(Event->pos()) == mMousePressTab)
+		tabCloseRequested(mMousePressTab);
+	else
+		QTabBar::mouseReleaseEvent(Event);
 }
 
 lcTabWidget::lcTabWidget()
 	: QTabWidget()
 {
-	setTabBar(new lcTabBar());
-}
-
-lcTabWidget::~lcTabWidget()
-{
-	if (tabBar())
-		delete tabBar();
+	lcTabBar* TabBar = new lcTabBar(this);
+	setTabBar(TabBar);
+	TabBar->setDrawBase(false);
 }
 
 void lcModelTabWidget::ResetLayout()

common/lc_mainwindow.h

@@ -32,21 +32,23 @@ struct lcSearchOptions
 
 class lcTabBar : public QTabBar
 {
+public:
+	lcTabBar(QWidget* Parent = nullptr)
+		: QTabBar(Parent), mMousePressTab(-1)
+	{
+	}
+
 protected:
-	void mouseReleaseEvent(QMouseEvent *event);
+	virtual void mousePressEvent(QMouseEvent* Event) override;
+	virtual void mouseReleaseEvent(QMouseEvent* Event) override;
+
+	int mMousePressTab;
 };
 
 class lcTabWidget : public QTabWidget
 {
 public:
 	lcTabWidget();
-	~lcTabWidget();
-#if (QT_VERSION < QT_VERSION_CHECK(5, 0, 0))
-	QTabBar* tabBar()
-	{
-		return QTabWidget::tabBar();
-	}
-#endif
 };
 
 class lcModelTabWidget : public QWidget