向量中特定位置的唯一_ptr向量

我有一个叫做Grid的类,它由单元格组成。每个单元格都可以有自己的格式(该概念类似于MS Excel)。

网格中的格式保存在向量中 std::vector<std::unique_ptr<CellFormat>> m_CellFormatTable

由于网格是一个矩阵,当单元格格式发生变化时,每个单元格都属于矩阵的不同部分,因此应反映在矩阵的正确部分,即在向量中正确定位(CellFormatTable)。因此,在这个阶段,我不能使用 push_back 向量的方法。

CellFormat类:

struct CellFormat
{
    wxFont m_Font;
    wxColor m_BackgroundColor, m_TextColor;
    int m_HorizontalAlignment, m_VerticalAlignment;

    CellFormat(Grid* ws) {
        m_BackgroundColor = ws->GetDefaultCellBackgroundColour();
        m_TextColor=ws->GetDefaultCellTextColour();
        int horizontal = 0, vertical = 0;
        ws->GetDefaultCellAlignment(&horizontal, &vertical);
    }

    CellFormat(const CellFormat& other) {
        m_Font = other.m_Font;
        m_BackgroundColor = other.m_BackgroundColor;
        m_TextColor = other.m_TextColor;
        m_HorizontalAlignment = other.m_HorizontalAlignment;
        m_VerticalAlignment = other.m_VerticalAlignment;
    }

    CellFormat& operator=(const CellFormat& other) {
        if (this == &other) return *this;
        m_Font = other.m_Font;
        m_BackgroundColor = other.m_BackgroundColor;
        m_TextColor = other.m_TextColor;
        m_HorizontalAlignment = other.m_HorizontalAlignment;
        m_VerticalAlignment = other.m_VerticalAlignment;

        return *this;
    }
};

在网格中。h

class Grid{
    std::vector<std::unique_ptr<CellFormat>> m_CellFormatTable;
    //
    CellFormat* GetCellFormat(int row, int column);
    void SetCellFormat(int row, int column, CellFormat format);
    void ApplyCellFormat(int row, int column, const CellFormat* format);
    CellFormat* CreateCellFormat(int row, int column);
    //rest is omitted
}

In Grid.cpp

Grid(some arguments){
    m_CellFormatTable.resize(nrows*ncols);
    //rest is omitted
}

CellFormat* Grid::GetCellFormat(int row, int column)
{
    int ncols= GetNumberCols();

    return m_CellFormatTable[row*ncols+ column].get();
}

void Grid::SetCellFormat(int row, int column, CellFormat other)
{
    CellFormat* format = GetCellFormat(row, column);
    if (format == 0) format = CreateCellFormat(row, column);
    *format = other;
}

void Grid::ApplyCellFormat(int row, int column, const CellFormat * format)
{
    if (format == 0) {
        int ncols= GetNumberCols();
        //Set everything to default values
        //Omitted

        m_CellFormatTable[row*ncols+ column].reset();
    }
    else {
        wxColor bgcolor = format->m_BackgroundColor;
        if (bgcolor.IsOk()) SetCellBackgroundColour(row, column, bgcolor);
        SetCellTextColour(row, column, format->m_TextColor);
        SetCellFont(row, column, format->m_Font);
        SetCellAlignment(row, column, format->m_HorizontalAlignment, format->m_VerticalAlignment);
    }
}

CellFormat* Grid::CreateCellFormat(int row, int column)
{
    int ncols= GetNumberCols();
    CellFormat* format = new CellFormat(this);
    m_CellFormatTable.emplace(m_CellFormatTable.begin() + row*ncols+ column, std::move(format));

    return format;
}

CellFormat* format = ws->GetCellFormat(row, col);
if (format == 0) format = ws->CreateCellFormat(row, col);

if (ChangeFillColor) {
    ws->SetCellBackgroundColour(row, col, m_LastChosenFillColor);
    format->m_BackgroundColor = m_LastChosenFillColor;
}

ApplyCellFormat 在点处的函数 format->m_BackgroundColor 因为应该是单元格背景色的颜色无效。这告诉我 CreateCellFormat 未将CellFormat放置在正确的位置。我尝试使用 insert emplace 但编译器(VS 2015)抱怨了我所有的尝试。

欢迎提出任何想法。