#pragma once

#include <QStack>
#include "iPlotBase_global.h"

class ZxRenderItem;

/// 图件树的迭代器
class I_PLOTBASE_EXPORT ZxRenderItemIterator
{
public:

    ZxRenderItemIterator(ZxRenderItem* pRootItem);
    ZxRenderItemIterator(const ZxRenderItemIterator& c);
    const ZxRenderItemIterator& operator=(const ZxRenderItemIterator& c);

public:

    // 先根遍历
    class I_PLOTBASE_EXPORT const_iterator
    {
        QStack<ZxRenderItem*> stack;
        const_iterator(ZxRenderItem* p);

    public:

        const_iterator(const const_iterator& c);

        ZxRenderItem* operator*();
        bool operator!=( const const_iterator& ) const;
        bool operator==( const const_iterator& ) const;
        const_iterator& operator++();
        const const_iterator& operator=(const const_iterator& c);

        friend class ZxRenderItemIterator;
    };

    const_iterator begin() const;
    const_iterator end() const;

private:

    ZxRenderItem* m_pRootItem;
};