rectanglegraphicsitem.h

#ifndef RECTANGLEGRAPHICSITEM_H
#define RECTANGLEGRAPHICSITEM_H
#include <QGraphicsRectItem>
 
#include <Kanoop/gui/libkanoopgui.h>
#include <Kanoop/geometry/point.h>
 
class Rectangle;
 
/**
 * @brief QGraphicsRectItem with an application-defined type integer and center-point helpers.
 *
 * RectangleGraphicsItem stores a type integer (returned by type()) that allows
 * qgraphicsitem_cast<> and scene item-type filtering to work with custom types.
 * It also provides centerPoint() and sceneCenterPoint() convenience accessors.
 */
class LIBKANOOPGUI_EXPORT RectangleGraphicsItem : public QGraphicsRectItem
{
public:
    /**
     * @brief Construct with a type integer and optional parent item.
     * @param type Application-defined graphics item type
     * @param parent Optional parent QGraphicsItem
     */
    explicit RectangleGraphicsItem(int type, QGraphicsItem* parent = nullptr);
 
    /**
     * @brief Construct from a Rectangle geometry object.
     * @param rect Rectangle geometry to display
     * @param type Application-defined graphics item type
     * @param parent Optional parent QGraphicsItem
     */
    explicit RectangleGraphicsItem(const Rectangle& rect, int type, QGraphicsItem* parent = nullptr);
 
    /**
     * @brief Return the application-defined type integer.
     * @return Item type value
     */
    virtual int type() const override { return _type; }
 
    /**
     * @brief Return the center of the item's bounding rect in item coordinates.
     * @return Center point in item coordinates
     */
    Point centerPoint() const;
 
    /**
     * @brief Return the center of the item's bounding rect in scene coordinates.
     * @return Center point in scene coordinates
     */
    Point sceneCenterPoint() const;
 
protected:
    /** @brief Handle graphics item change notifications. */
    virtual QVariant itemChange(GraphicsItemChange change, const QVariant& value) override;
 
private:
    int _type;
};
 
#endif // RECTANGLEGRAPHICSITEM_H