Use QEnterEvent for QWidget::enterEvent on Qt 6 (#4365)

* fix: use concrete QEnterEvent on Qt 6

* chore: add changelog entry

src/widgets/splits/Split.cpp

@@ -822,7 +822,11 @@ void Split::resizeEvent(QResizeEvent *event)
     this->overlay_->setGeometry(this->rect());
 }
 
-void Split::enterEvent(QEvent *event)
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+void Split::enterEvent(QEnterEvent * /*event*/)
+#else
+void Split::enterEvent(QEvent * /*event*/)
+#endif
 {
     this->isMouseOver_ = true;
 

src/widgets/splits/Split.hpp

@@ -105,7 +105,11 @@ protected:
     void keyPressEvent(QKeyEvent *event) override;
     void keyReleaseEvent(QKeyEvent *event) override;
     void resizeEvent(QResizeEvent *event) override;
-    void enterEvent(QEvent *event) override;
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    void enterEvent(QEnterEvent * /*event*/) override;
+#else
+    void enterEvent(QEvent * /*event*/) override;
+#endif
     void leaveEvent(QEvent *event) override;
 
     void dragEnterEvent(QDragEnterEvent *event) override;

src/widgets/splits/SplitHeader.cpp

@@ -945,7 +945,11 @@ void SplitHeader::mouseDoubleClickEvent(QMouseEvent *event)
     this->doubleClicked_ = true;
 }
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+void SplitHeader::enterEvent(QEnterEvent *event)
+#else
 void SplitHeader::enterEvent(QEvent *event)
+#endif
 {
     if (!this->tooltipText_.isEmpty())
     {

src/widgets/splits/SplitHeader.hpp

@@ -42,7 +42,11 @@ protected:
     void mousePressEvent(QMouseEvent *event) override;
     void mouseReleaseEvent(QMouseEvent *event) override;
     void mouseMoveEvent(QMouseEvent *event) override;
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    void enterEvent(QEnterEvent *event) override;
+#else
     void enterEvent(QEvent *event) override;
+#endif
     void leaveEvent(QEvent *event) override;
     void mouseDoubleClickEvent(QMouseEvent *event) override;