ui: Fixed scrolling in code view list mode broken for Mac touchpad

src/lib_gui/qt/element/QtCodeArea.cpp

@@ -30,8 +30,7 @@
 
 std::vector<QtCodeArea::AnnotationColor> QtCodeArea::s_annotationColors;
 
-MouseWheelOverScrollbarFilter::MouseWheelOverScrollbarFilter(QObject* parent)
-	: QObject(parent)
+MouseWheelOverScrollbarFilter::MouseWheelOverScrollbarFilter()
 {
 }
 
@@ -146,7 +145,7 @@ QtCodeArea::QtCodeArea(
 	this->setMouseTracking(true);
 
 	// MouseWheelOverScrollbarFilter is deleted by parent.
-	horizontalScrollBar()->installEventFilter(new MouseWheelOverScrollbarFilter(this));
+	horizontalScrollBar()->installEventFilter(new MouseWheelOverScrollbarFilter());
 	m_scrollSpeedChangeListener.setScrollBar(horizontalScrollBar());
 
 	createActions();
@@ -586,6 +585,19 @@ void QtCodeArea::mouseMoveEvent(QMouseEvent* event)
 	}
 }
 
+void QtCodeArea::wheelEvent(QWheelEvent *event)
+{
+	if ((event->angleDelta().x() != 0 && horizontalScrollBar()->minimum() != horizontalScrollBar()->maximum()) ||
+		(event->angleDelta().y() != 0 && verticalScrollBar()->minimum() != verticalScrollBar()->maximum()))
+	{
+		QPlainTextEdit::wheelEvent(event);
+	}
+	else
+	{
+		event->ignore();
+	}
+}
+
 void QtCodeArea::contextMenuEvent(QContextMenuEvent* event)
 {
 	if (m_setIDECursorPositionAction != nullptr)

src/lib_gui/qt/element/QtCodeArea.h

@@ -21,18 +21,20 @@ class QWidget;
 class TokenLocation;
 class TokenLocationFile;
 
+
 class MouseWheelOverScrollbarFilter
 	: public QObject
 {
 	Q_OBJECT
 
 public:
-	MouseWheelOverScrollbarFilter(QObject* parent);
+	MouseWheelOverScrollbarFilter();
 
 protected:
 	bool eventFilter(QObject* obj, QEvent* event);
 };
 
+
 class QtCodeArea
 	: public QPlainTextEdit
 {
@@ -102,6 +104,7 @@ protected:
 	virtual void mouseReleaseEvent(QMouseEvent* event) Q_DECL_OVERRIDE;
 	virtual void mousePressEvent(QMouseEvent* event) Q_DECL_OVERRIDE;
 	virtual void mouseMoveEvent(QMouseEvent* event) Q_DECL_OVERRIDE;
+	virtual void wheelEvent(QWheelEvent *event) Q_DECL_OVERRIDE;
 
 	virtual void contextMenuEvent(QContextMenuEvent* event) Q_DECL_OVERRIDE;