rotated view + wheel inverter

Plugins/ZShell/Components/CMakeLists.txt

@@ -1,10 +1,11 @@
 qml_module(ZShell-components
 	URI ZShell.Components
-    SOURCES
-        lazylistview.hpp lazylistview.cpp
+				SOURCES
+								lazylistview.hpp lazylistview.cpp
 		wavyline.hpp wavyline.cpp
 		buttonrow.hpp buttonrow.cpp
 		carouselview.hpp carouselview.cpp
-    LIBRARIES
-        Qt::Quick
+		wheelinverter.hpp
+				LIBRARIES
+								Qt::Quick
 )

Plugins/ZShell/Components/wheelinverter.hpp

@@ -0,0 +1,90 @@
+#pragma once
+
+#include <QQuickItem>
+#include <QQuickWindow>
+#include <QWheelEvent>
+#include <QCoreApplication>
+#include <QPointer>
+#include <QDebug>
+
+namespace ZShell::components {
+
+class WheelInverter : public QQuickItem {
+	Q_OBJECT
+	QML_ELEMENT
+
+	Q_PROPERTY(
+		QQuickItem* target READ target WRITE setTarget NOTIFY targetChanged)
+
+	public:
+	using QQuickItem::QQuickItem;
+
+	QQuickItem* target() const { return m_target; }
+
+	void setTarget(QQuickItem* target) {
+		if (m_target == target) return;
+
+		if (m_target) m_target->removeEventFilter(this);
+
+		m_target = target;
+
+		if (m_target) m_target->installEventFilter(this);
+
+		emit targetChanged();
+	}
+
+	protected:
+	class InvertedWheelEvent : public QWheelEvent {
+		public:
+		using QWheelEvent::QWheelEvent;
+
+		bool invertedByWheelInverter = true;
+	};
+
+	bool eventFilter(QObject* watched, QEvent* event) override {
+		if (watched != m_target || event->type() != QEvent::Wheel)
+			return QQuickItem::eventFilter(watched, event);
+
+		auto* wheel = static_cast<QWheelEvent*>(event);
+
+		const bool inverted = dynamic_cast<InvertedWheelEvent*>(wheel) !=
+							  nullptr;
+
+		if (inverted) return false;
+
+		auto* window = m_target ? m_target->window() : nullptr;
+		if (!window) {
+			qInfo() << "[WheelInverter] no window";
+			return false;
+		}
+
+		const QPointF windowPos =
+			window->mapFromGlobal(wheel->globalPosition());
+
+		auto* invertedEvent = new InvertedWheelEvent(
+			windowPos,
+			wheel->globalPosition(),
+			-wheel->pixelDelta(),
+			-wheel->angleDelta(),
+			wheel->buttons(),
+			wheel->modifiers(),
+			wheel->phase(),
+			wheel->inverted(),
+			wheel->source(),
+			wheel->pointingDevice());
+
+		invertedEvent->setTimestamp(wheel->timestamp());
+
+		QCoreApplication::postEvent(window, invertedEvent);
+
+		return true;
+	}
+
+	signals:
+	void targetChanged();
+
+	private:
+	QPointer<QQuickItem> m_target;
+};
+
+} // namespace ZShell::components