drawing reworked into c++ plugin, moved input handler to Interactions.qml as a PointHandler

Plugins/ZShell/Internal/strokecanvasitem.hpp

@@ -0,0 +1,59 @@
+#pragma once
+
+#include <QCanvasPainterItem>
+#include <QColor>
+#include <QPointF>
+#include <QVector>
+#include <qcolor.h>
+#include <qcontainerfwd.h>
+#include "stroke.hpp"
+
+namespace ZShell::internal {
+
+class StrokeCanvasRenderer;
+
+class StrokeCanvasItem : public QCanvasPainterItem {
+Q_OBJECT
+
+QML_NAMED_ELEMENT(StrokeCanvas)
+
+Q_PROPERTY(QColor penColor READ penColor WRITE setPenColor NOTIFY penColorChanged)
+Q_PROPERTY(qreal penWidth READ penWidth WRITE setPenWidth NOTIFY penWidthChanged)
+
+public:
+explicit StrokeCanvasItem(QQuickItem *parent = nullptr);
+
+[[nodiscard]] QColor penColor() const {
+	return m_penColor;
+}
+[[nodiscard]] float penWidth() const {
+	return m_penWidth;
+}
+
+void setPenColor(const QColor &color);
+void setPenWidth(float width);
+
+Q_INVOKABLE void clear();
+
+Q_INVOKABLE void beginStroke(qreal x, qreal y);
+Q_INVOKABLE void appendPoint(qreal x, qreal y);
+Q_INVOKABLE void endStroke();
+
+signals:
+void penColorChanged();
+void penWidthChanged();
+
+protected:
+[[nodiscard]] QCanvasPainterItemRenderer *createItemRenderer() const override;
+
+private:
+friend class StrokeCanvasRenderer;
+
+QColor m_penColor = Qt::white;
+float m_penWidth = 4.f;
+
+QVector<Stroke> m_strokes;
+Stroke m_currentStroke;
+};
+
+};