YiAbstractDataModel.h

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// © You i Labs Inc. 2000-2017. All rights reserved.
#ifndef _YI_ABSTRACT_DATA_MODEL_H_
#define _YI_ABSTRACT_DATA_MODEL_H_

#include "datamodel/YiDataModelIndex.h"
#include "framework/YiAny.h"
#include "framework/YiPredef.h"
#include "signal/YiSignal.h"

class CYIDataModelItem;
class CYIAbstractDataModelPriv;

class CYIAbstractDataModel
{
public:
    friend class CYIDataModelItem;

    CYIAbstractDataModel(int32_t nRows, int32_t nColumns = 1);
    virtual ~CYIAbstractDataModel();

    virtual bool IsMoreDataAvailable(const CYIDataModelIndex &parent) const;
    
    virtual bool FetchMoreData(const CYIDataModelIndex &parent);

    void Clear();

    int32_t GetRowCount(const CYIDataModelIndex &parent = CYIDataModelIndex()) const;

    int32_t GetColumnCount(const CYIDataModelIndex &parent = CYIDataModelIndex()) const;

    CYIDataModelIndex GetParent(const CYIDataModelIndex &child) const;

    virtual CYIDataModelIndex GetIndex(int32_t nRow, int32_t nColumn, const CYIDataModelIndex &parent = CYIDataModelIndex()) const;

    bool HasChildren(const CYIDataModelIndex &parent) const;

    bool HasIndex(int32_t nRow, int32_t nColumn, const CYIDataModelIndex &parent = CYIDataModelIndex()) const;

    virtual bool InsertColumn(int32_t nColumn, const CYIDataModelIndex &parent = CYIDataModelIndex());

    virtual bool InsertColumns(int32_t nColumn, int32_t nCount, const CYIDataModelIndex &parent = CYIDataModelIndex());

    virtual bool InsertRow(int32_t nRow, const CYIDataModelIndex &parent = CYIDataModelIndex());

    virtual bool InsertRows(int32_t nRow, int32_t nCount, const CYIDataModelIndex &parent = CYIDataModelIndex());

    virtual bool RemoveColumn(int32_t nColumn, const CYIDataModelIndex &parent = CYIDataModelIndex());

    virtual bool RemoveRow(int32_t nRow, const CYIDataModelIndex &parent = CYIDataModelIndex());

    bool SetItemData(const CYIDataModelIndex &index, const CYIAny &pData);

    const CYIAny &GetItemData(const CYIDataModelIndex &index) const;

    CYISignal<> ModelCleared;
    CYISignal<const CYIDataModelIndex & /*pIndex*/> ModelChanged;
    CYISignal<const CYIDataModelIndex & /*parent*/, int32_t /*nStart*/, int32_t /*nEnd*/> ColumnsInserted;
    CYISignal<const CYIDataModelIndex & /*parent*/, int32_t /*nStart*/, int32_t /*nEnd*/> RowsInserted;
    CYISignal<const CYIDataModelIndex & /*parent*/, int32_t /*nStart*/, int32_t /*nEnd*/> ColumnsRemoved;
    CYISignal<const CYIDataModelIndex & /*parent*/, int32_t /*nStart*/, int32_t /*nEnd*/> RowsRemoved;

protected:
    void NotifyModelChanged(const CYIDataModelIndex &pIndex);
    void NotifyColumnsInserted(const CYIDataModelIndex &index, int32_t nColumn, int32_t nCount);
    void NotifyRowsInserted(const CYIDataModelIndex &index, int32_t nRow, int32_t nCount);
    void NotifyColumnsRemoved(const CYIDataModelIndex &parent, int32_t nColumn, int32_t nCount);
    void NotifyRowsRemoved(const CYIDataModelIndex &parent, int32_t nRow, int32_t nCount);

    CYIAbstractDataModelPriv *m_pPriv;

private:
    YI_DISALLOW_COPY_AND_ASSIGN(CYIAbstractDataModel)
};

#endif // _YI_ABSTRACT_DATA_MODEL_H_