DiagramDesigner/common/include/pluginCommon/iCanvasItem.h

//ICanvasItem.h
#pragma once

#include <QObject>
#include <QRectF>
#include <QPainter>

class ICanvasItem : public QObject
{
    Q_OBJECT
public:
    virtual ~ICanvasItem() = default;

    // 基本信息
    virtual QString typeId() const = 0;
    virtual QString displayName() const = 0;
    virtual int baseType() const = 0;       //基础分类
    virtual bool containSvg() const = 0;

    // 几何属性
    virtual QRectF bounds() const = 0;
    virtual void setBounds(const QRectF &rect) = 0;

    // 绘制
    virtual void draw(QPainter *painter, const QRectF &rect) = 0;

    // 属性管理
    virtual QVariant getProperty(const QString &key) const = 0;
    virtual void setProperty(const QString &key, const QVariant &value) = 0;

signals:
    void boundsChanged(const QRectF &newBounds);
    void propertyChanged(const QString &key, const QVariant &value);
};