multicell.cpp

wxGTK 是 wxWidgets 的 linux GTK+ (>2.2.3)版本。wxWidgets 是一个跨平台的 GUI 框架

            if (rect->GetStyle() & wxVERTICAL_RESIZABLE ||
                rect->GetHeight() > 1 ||
                m_minSizes[rect->GetRow()]->GetHeight() < 0)
            {
                int h = 0;
                for (int x = 0; x < rect->GetHeight(); x++)
                {
                    h += m_maxHeight[rect->GetRow() + x];
                }
                c_size.SetHeight(h);
            }
            else
            {
                c_size.SetHeight(minSize.GetHeight());
            }
            int extraHeight = (m_maxHeight[rect->GetRow()] - c_size.GetHeight());
            int extraWidth = (m_maxWidth[rect->GetColumn()] - c_size.GetWidth());

            if (rect->GetWidth() == 1 && rect->GetAlignment() & wxALIGN_CENTER_HORIZONTAL)
            {
                c_point.x += extraWidth / 2;
            }
            if (rect->GetWidth() == 1 && rect->GetAlignment() & wxALIGN_RIGHT)
            {
                c_point.x += extraWidth;
            }
            if (rect->GetHeight() == 1 && rect->GetAlignment() & wxALIGN_CENTER_VERTICAL)
            {
                c_point.y += extraHeight / 2;
            }
            if (rect->GetHeight() == 1 && rect->GetAlignment() & wxALIGN_BOTTOM)
            {
                c_point.y += extraHeight;
            }
            item->SetDimension(c_point, c_size);
        }
        current = current->GetNext();
    }
}
//---------------------------------------------------------------------------
wxSize wxMultiCellSizer::CalcMin()
{
    if (m_children.GetCount() == 0)
        return wxSize(10,10);

    GetMinimums();
    int m_minWidth = Sum(m_maxWidth, m_cell_count.GetWidth());
    int m_minHeight = Sum(m_maxHeight, m_cell_count.GetHeight());
    return wxSize( m_minWidth, m_minHeight );
}
//---------------------------------------------------------------------------
void wxMultiCellSizer :: GetMinimums()
{
    // We first initial all the arrays EXCEPT for the m_minsizes array.

    memset(m_maxHeight, 0, sizeof(int) * m_cell_count.GetHeight());
    memset(m_maxWidth, 0, sizeof(int) * m_cell_count.GetWidth());
    memset(m_rowStretch, 0, sizeof(int) * m_cell_count.GetHeight());
    memset(m_colStretch, 0, sizeof(int) * m_cell_count.GetWidth());
    for (int x = 0; x < 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
    {
        m_weights[x]->SetHeight(0);
        m_weights[x]->SetWidth(0);
    }

    wxSizerItemList::compatibility_iterator     node = m_children.GetFirst();
    while (node)
    {
        wxSizerItem     *item = node->GetData();
        wxMultiCellItemHandle *rect;
        if (item != NULL &&
            (rect = (wxMultiCellItemHandle *)item->GetUserData()) != NULL)
        {
            int row = rect->GetRow();
            int col = rect->GetColumn();

            // First make sure that the control knows about the max rows and columns

            int changed = false;
            if (row + 1 > m_cell_count.GetHeight())
            {
                changed++;
                m_maxHeight = (int *)realloc(m_maxHeight, (1 + row) * sizeof(int));
                m_rowStretch = (int *)realloc(m_rowStretch, (1 + row) * sizeof(int));
                for (int x = m_cell_count.GetHeight(); x < row + 1; x++)
                {
                    m_maxHeight[x - 1] = 0;
                    m_rowStretch[x - 1] = 0;
                }
                m_cell_count.SetHeight(row + 1);
            }
            if (col + 1 > m_cell_count.GetWidth())
            {
                changed++;
                m_maxWidth = (int *)realloc(m_maxWidth, (1 + col) * sizeof(int));
                m_colStretch = (int *)realloc(m_colStretch, ( 1 + col) * sizeof(int));
                for (int x = m_cell_count.GetWidth(); x < col + 1; x++)
                {
                    m_maxWidth[x - 1] = 0;
                    m_colStretch[x - 1] = 0;
                }
                m_cell_count.SetWidth(col + 1);
            }
            if (changed)
            {
                m_weights = (wxSize **)realloc(m_weights, (1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth())) * sizeof(wxSize *));
                m_minSizes = (wxSize **)realloc(m_minSizes, (1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth())) * sizeof(wxSize *));
                for (int x = m_maxWeights; x < 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
                {
                    m_weights[x - 1] = new wxSize(0,0);
                    m_minSizes[x - 1] = new wxSize(0,0);
                }
                m_maxWeights = 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth());
            }

            // Sum the m_weights for each row/column, but only if they are resizable

            wxSize minSize( item->CalcMin() );
            wxSize c_size = rect->GetLocalSize();
            if (c_size.GetHeight() != wxDefaultCoord ||
                c_size.GetWidth() != wxDefaultCoord)
            {
                minSize.SetHeight(wxMax(minSize.GetHeight(), c_size.GetHeight()));
                minSize.SetWidth(wxMax(minSize.GetWidth(), c_size.GetWidth()));
            }

            // For each row, calculate the max height for those fields which are not
            // resizable in the vertical pane

            if (!(rect->GetStyle() & wxVERTICAL_RESIZABLE || m_minSizes[row]->GetHeight() < 0))
            {
                m_maxHeight[row] = wxMax(m_maxHeight[row], minSize.GetHeight() / rect->GetHeight());
            }
            else
            {
                m_rowStretch[row] = 1;
                if (m_minSizes[row]->GetHeight())
                {
                    m_maxHeight[row] = abs(m_minSizes[row]->GetHeight());
                }
                else
                {
                    m_maxHeight[row] = wxMax(m_maxHeight[row], m_defaultCellSize.GetHeight());
                }
                m_weights[row]->SetHeight(wxMax(m_weights[row]->GetHeight(), rect->GetWeight().GetHeight()));
            }

            // For each column, calculate the max width for those fields which are not
            // resizable in the horizontal pane

            if (!(rect->GetStyle() & wxHORIZONTAL_RESIZABLE || m_minSizes[col]->GetWidth() < 0))
            {
                if (m_minSizes[col]->GetWidth())
                {
                    m_maxWidth[col] = abs(m_minSizes[col]->GetWidth());
                }
                else
                {
                    m_maxWidth[col] = wxMax(m_maxWidth[col], minSize.GetWidth() / rect->GetWidth());
                }
            }
            else
            {
                m_colStretch[col] = 1;
                m_maxWidth[col] = wxMax(m_maxWidth[col], m_defaultCellSize.GetWidth());
                m_weights[col]->SetWidth(wxMax(m_weights[col]->GetWidth(), rect->GetWeight().GetWidth()));
            }
            node = node->GetNext();
        }
    }
} // wxMultiCellSizer :: GetMinimums
//---------------------------------------------------------------------------
/*
 *Function Name: wxMultiCellSizer :: Sum
 *
 *Parameters:    int* pointer to array of ints
 *               int  Number of cells to sum up
 *
 *Description:   This member function sums up all the elements of the array which
 *               preceed the specified cell.
 *
 *Returns:       int Sum
 *
 */

int wxMultiCellSizer :: Sum(int *array, int x)
{
    int sum = 0;
    while (x--)
    {
        sum += array[x];
    }
    return sum;
}
//---------------------------------------------------------------------------
/*
 *Function Name: wxMultiCellSizer :: DrawGridLines
 *
 *Parameters:    wxDC Device context
 *
 *Description:   This function draws the grid lines in the specified device context.
 *
 */

void wxMultiCellSizer :: DrawGridLines(wxDC& dc)
{
    RecalcSizes();
    int maxW = Sum(m_maxWidth, m_cell_count.GetWidth());
    int maxH = Sum(m_maxHeight, m_cell_count.GetHeight());
    int x;

    // Draw the columns
    dc.SetPen(* m_pen);
    for (x = 1; x < m_cell_count.GetWidth(); x++)
    {
        int colPos = Sum(m_maxWidth, x) ;
        dc.DrawLine(colPos, 0, colPos, maxH);
    }

    // Draw the rows
    for (x = 1; x < m_cell_count.GetHeight(); x++)
    {
        int rowPos = Sum(m_maxHeight, x);
        dc.DrawLine(0, rowPos, maxW, rowPos);
    }
}
//---------------------------------------------------------------------------
// Define the repainting behaviour
/*
 *Function Name: wxMultiCellSizer::OnPaint
 *
 *Parameters:    wxDC Device context
 *
 *Description:   This function calls the DrawGridLines() member if a window
 *               has been previously specified.  This functions MUST be called
 *               from an OnPaint member belonging to the window which the sizer
 *               is attached to.
 *
 */

void wxMultiCellSizer::OnPaint(wxDC& dc )
{
    if (m_win)
    {
        DrawGridLines(dc);
    }
}


//---------------------------------------------------------------------------
//---------------------------------------------------------------------------




#define CELL_LOC(row, col) ((row) * m_maxCols + col)

//---------------------------------------------------------------------------
// wxCell
//---------------------------------------------------------------------------
/*
 *Function Name: wxCell : wxLayoutConstraints
 *
 *Description:   This class is used by wxMultiCellCanvas for internal storage
 *
 */

class wxCell : public wxLayoutConstraints
{
public:
    wxCell(wxWindow *win)
    {
        m_window = win;
    };

    wxWindow    *m_window;
};



//---------------------------------------------------------------------------
// wxMultiCellCanvas
//---------------------------------------------------------------------------
wxMultiCellCanvas :: wxMultiCellCanvas(wxWindow *par, int numRows, int numCols)
   : wxFlexGridSizer(numRows, numCols, 0, 0)
{
    m_cells = (wxCell **)calloc(numRows * numCols, sizeof(wxCell *));

    m_parent = par;
    m_maxRows = numRows;
    m_maxCols = numCols;
    m_minCellSize = wxSize(5, 5);
}
//---------------------------------------------------------------------------
void wxMultiCellCanvas :: Add(wxWindow *win, unsigned int row, unsigned int col)
{
  // thanks to unsigned data row and col are always >= 0
    wxASSERT_MSG( /* row >= 0 && */ row < m_maxRows,
                 wxString::Format(_T("Row %d out of bounds (0..%d)"), row, m_maxRows) );
    wxASSERT_MSG( /* col >= 0 && */ col < m_maxCols,
                 wxString::Format(_T("Column %d out of bounds (0..%d)"), col, m_maxCols) );

    wxASSERT_MSG(m_cells[CELL_LOC(row, col)] == NULL, wxT("Cell already occupied"));

    wxCell *newCell = new wxCell(win);
    m_cells[CELL_LOC(row,col)] = newCell;
}
//---------------------------------------------------------------------------
void wxMultiCellCanvas :: CalculateConstraints()
{
    unsigned int    row, col;
    for (row = 0; row < m_maxRows; row++)
    {
        for (col = 0; col < m_maxCols; col++)
        {
            if (!m_cells[CELL_LOC(row, col)])
            {
                // Create an empty static text field as a placeholder
                m_cells[CELL_LOC(row, col)] = new wxCell(new wxStaticText(m_parent, wxID_ANY, wxEmptyString));
            }
            wxFlexGridSizer::Add(m_cells[CELL_LOC(row, col)]->m_window);
        }
    }
}

/*** End of File ***/