#ifndef PLCDOCUMENT_H
#define PLCDOCUMENT_H

#include "basedocument.h"
#include <QGraphicsScene>
#include <QGraphicsView>

class PLCDocument : public BaseDocument
{
    Q_OBJECT
public:
    explicit PLCDocument(QWidget *parent = nullptr);
    ~PLCDocument() override;

    QString title() const override;
    QGraphicsView *view() const { return m_view; }
    QGraphicsScene *scene() const { return m_scene; }

    bool saveToFile(const QString &filePath) override;
    bool loadFromFile(const QString &filePath) override;

private:
    void createGridBackground();
    void createGridPattern();

    QGraphicsScene *m_scene;
    QGraphicsView *m_view;
    QPixmap m_gridPattern; // 网格图案缓存
    int m_gridSize = 20;   // 网格大小（像素）
};

#endif // PLCDOCUMENT_H