document.h Example File

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#ifndef DOCUMENT_H #define DOCUMENT_H #include <QWidget> QT_FORWARD_DECLARE_CLASS(QUndoStack) QT_FORWARD_DECLARE_CLASS(QTextStream) class Shape { public: enum Type { Rectangle, Circle, Triangle }; explicit Shape(Type type = Rectangle, const QColor &color = Qt::red, const QRect &rect = QRect()); Type type() const; QString name() const; QRect rect() const; QRect resizeHandle() const; QColor color() const; static QString typeToString(Type type); static Type stringToType(const QString &s, bool *ok = 0); static const QSize minSize; private: Type m_type; QRect m_rect; QColor m_color; QString m_name; friend class Document; }; class Document : public QWidget { Q_OBJECT public: Document(QWidget *parent = 0); QString addShape(const Shape &shape); void deleteShape(const QString &shapeName); Shape shape(const QString &shapeName) const; QString currentShapeName() const; void setShapeRect(const QString &shapeName, const QRect &rect); void setShapeColor(const QString &shapeName, const QColor &color); bool load(QTextStream &stream); void save(QTextStream &stream); QString fileName() const; void setFileName(const QString &fileName); QUndoStack *undoStack() const; signals: void currentShapeChanged(const QString &shapeName); protected: void paintEvent(QPaintEvent *event) override; void mousePressEvent(QMouseEvent *event) override; void mouseReleaseEvent(QMouseEvent *event) override; void mouseMoveEvent(QMouseEvent *event) override; private: void setCurrentShape(int index); int indexOf(const QString &shapeName) const; int indexAt(const QPoint &pos) const; QString uniqueName(const QString &name) const; QList<Shape> m_shapeList; int m_currentIndex; int m_mousePressIndex; QPoint m_mousePressOffset; bool m_resizeHandlePressed; QString m_fileName; QUndoStack *m_undoStack; }; #endif // DOCUMENT_H

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