grid.cpp

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    wxASSERT_MSG(m_control,
                 wxT("The wxGridCellEditor must be Created first!"));

    CBox()->SetValue(m_startValue);
}

void wxGridCellBoolEditor::StartingClick()
{
    CBox()->SetValue(!CBox()->GetValue());
}

bool wxGridCellBoolEditor::IsAcceptedKey(wxKeyEvent& event)
{
    if ( wxGridCellEditor::IsAcceptedKey(event) )
    {
        int keycode = event.GetKeyCode();
        switch ( keycode )
        {
            case WXK_SPACE:
            case '+':
            case '-':
                return true;
        }
    }

    return false;
}

void wxGridCellBoolEditor::StartingKey(wxKeyEvent& event)
{
    int keycode = event.GetKeyCode();
    switch ( keycode )
    {
        case WXK_SPACE:
            CBox()->SetValue(!CBox()->GetValue());
            break;

        case '+':
            CBox()->SetValue(true);
            break;

        case '-':
            CBox()->SetValue(false);
            break;
    }
}


// return the value as "1" for true and the empty string for false
wxString wxGridCellBoolEditor::GetValue() const
{
  bool bSet = CBox()->GetValue();
  return bSet ? _T("1") : wxEmptyString;
}

#endif // wxUSE_CHECKBOX

#if wxUSE_COMBOBOX

// ----------------------------------------------------------------------------
// wxGridCellChoiceEditor
// ----------------------------------------------------------------------------

wxGridCellChoiceEditor::wxGridCellChoiceEditor(const wxArrayString& choices,
                                               bool allowOthers)
    : m_choices(choices),
      m_allowOthers(allowOthers) { }

wxGridCellChoiceEditor::wxGridCellChoiceEditor(size_t count,
                                               const wxString choices[],
                                               bool allowOthers)
                      : m_allowOthers(allowOthers)
{
    if ( count )
    {
        m_choices.Alloc(count);
        for ( size_t n = 0; n < count; n++ )
        {
            m_choices.Add(choices[n]);
        }
    }
}

wxGridCellEditor *wxGridCellChoiceEditor::Clone() const
{
    wxGridCellChoiceEditor *editor = new wxGridCellChoiceEditor;
    editor->m_allowOthers = m_allowOthers;
    editor->m_choices = m_choices;

    return editor;
}

void wxGridCellChoiceEditor::Create(wxWindow* parent,
                                    wxWindowID id,
                                    wxEvtHandler* evtHandler)
{
    m_control = new wxComboBox(parent, id, wxEmptyString,
                               wxDefaultPosition, wxDefaultSize,
                               m_choices,
                               m_allowOthers ? 0 : wxCB_READONLY);

    wxGridCellEditor::Create(parent, id, evtHandler);
}

void wxGridCellChoiceEditor::PaintBackground(const wxRect& rectCell,
                                             wxGridCellAttr * attr)
{
    // as we fill the entire client area, don't do anything here to minimize
    // flicker

    // TODO: It doesn't actually fill the client area since the height of a
    // combo always defaults to the standard...  Until someone has time to
    // figure out the right rectangle to paint, just do it the normal way...
    wxGridCellEditor::PaintBackground(rectCell, attr);
}

void wxGridCellChoiceEditor::BeginEdit(int row, int col, wxGrid* grid)
{
    wxASSERT_MSG(m_control,
                 wxT("The wxGridCellEditor must be Created first!"));

    wxGridCellEditorEvtHandler* evtHandler = NULL;
    if (m_control)
        evtHandler = wxDynamicCast(m_control->GetEventHandler(), wxGridCellEditorEvtHandler);

    // Don't immediately end if we get a kill focus event within BeginEdit
    if (evtHandler)
        evtHandler->SetInSetFocus(true);

    m_startValue = grid->GetTable()->GetValue(row, col);

    if (m_allowOthers)
        Combo()->SetValue(m_startValue);
    else
    {
        // find the right position, or default to the first if not found
        int pos = Combo()->FindString(m_startValue);
        if (pos == wxNOT_FOUND)
            pos = 0;
        Combo()->SetSelection(pos);
    }
    Combo()->SetInsertionPointEnd();
    Combo()->SetFocus();

    if (evtHandler)
    {
        // When dropping down the menu, a kill focus event
        // happens after this point, so we can't reset the flag yet.
#if !defined(__WXGTK20__)
        evtHandler->SetInSetFocus(false);
#endif
    }
}

bool wxGridCellChoiceEditor::EndEdit(int row, int col,
                                     wxGrid* grid)
{
    wxString value = Combo()->GetValue();
    if ( value == m_startValue )
        return false;

    grid->GetTable()->SetValue(row, col, value);

    return true;
}

void wxGridCellChoiceEditor::Reset()
{
    Combo()->SetValue(m_startValue);
    Combo()->SetInsertionPointEnd();
}

void wxGridCellChoiceEditor::SetParameters(const wxString& params)
{
    if ( !params )
    {
        // what can we do?
        return;
    }

    m_choices.Empty();

    wxStringTokenizer tk(params, _T(','));
    while ( tk.HasMoreTokens() )
    {
        m_choices.Add(tk.GetNextToken());
    }
}

// return the value in the text control
wxString wxGridCellChoiceEditor::GetValue() const
{
  return Combo()->GetValue();
}

#endif // wxUSE_COMBOBOX

// ----------------------------------------------------------------------------
// wxGridCellEditorEvtHandler
// ----------------------------------------------------------------------------

void wxGridCellEditorEvtHandler::OnKillFocus(wxFocusEvent& event)
{
    // Don't disable the cell if we're just starting to edit it
    if (m_inSetFocus)
        return;

    // accept changes
    m_grid->DisableCellEditControl();

    event.Skip();
}

void wxGridCellEditorEvtHandler::OnKeyDown(wxKeyEvent& event)
{
    switch ( event.GetKeyCode() )
    {
        case WXK_ESCAPE:
            m_editor->Reset();
            m_grid->DisableCellEditControl();
            break;

        case WXK_TAB:
            m_grid->GetEventHandler()->ProcessEvent( event );
            break;

        case WXK_RETURN:
        case WXK_NUMPAD_ENTER:
            if (!m_grid->GetEventHandler()->ProcessEvent(event))
                m_editor->HandleReturn(event);
            break;

        default:
            event.Skip();
    }
}

void wxGridCellEditorEvtHandler::OnChar(wxKeyEvent& event)
{
    switch ( event.GetKeyCode() )
    {
        case WXK_ESCAPE:
        case WXK_TAB:
        case WXK_RETURN:
        case WXK_NUMPAD_ENTER:
            break;

        default:
            event.Skip();
    }
}

// ----------------------------------------------------------------------------
// wxGridCellWorker is an (almost) empty common base class for
// wxGridCellRenderer and wxGridCellEditor managing ref counting
// ----------------------------------------------------------------------------

void wxGridCellWorker::SetParameters(const wxString& WXUNUSED(params))
{
    // nothing to do
}

wxGridCellWorker::~wxGridCellWorker()
{
}

// ============================================================================
// renderer classes
// ============================================================================

// ----------------------------------------------------------------------------
// wxGridCellRenderer
// ----------------------------------------------------------------------------

void wxGridCellRenderer::Draw(wxGrid& grid,
                              wxGridCellAttr& attr,
                              wxDC& dc,
                              const wxRect& rect,
                              int WXUNUSED(row), int WXUNUSED(col),
                              bool isSelected)
{
    dc.SetBackgroundMode( wxSOLID );

    // grey out fields if the grid is disabled
    if( grid.IsEnabled() )
    {
        if ( isSelected )
        {
            dc.SetBrush( wxBrush(grid.GetSelectionBackground(), wxSOLID) );
        }
        else
        {
            dc.SetBrush( wxBrush(attr.GetBackgroundColour(), wxSOLID) );
        }
    }
    else
    {
        dc.SetBrush(wxBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE), wxSOLID));
    }

    dc.SetPen( *wxTRANSPARENT_PEN );
    dc.DrawRectangle(rect);
}

// ----------------------------------------------------------------------------
// wxGridCellStringRenderer
// ----------------------------------------------------------------------------

void wxGridCellStringRenderer::SetTextColoursAndFont(wxGrid& grid,
                                                     wxGridCellAttr& attr,
                                                     wxDC& dc,
                                                     bool isSelected)
{
    dc.SetBackgroundMode( wxTRANSPARENT );

    // TODO some special colours for attr.IsReadOnly() case?

    // different coloured text when the grid is disabled
    if( grid.IsEnabled() )
    {
      if ( isSelected )
      {
          dc.SetTextBackground( grid.GetSelectionBackground() );
          dc.SetTextForeground( grid.GetSelectionForeground() );
      }
      else
      {
          dc.SetTextBackground( attr.GetBackgroundColour() );
          dc.SetTextForeground( attr.GetTextColour() );
      }
    }
    else
    {
      dc.SetTextBackground(wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE));
      dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_GRAYTEXT));
    }

    dc.SetFont( attr.GetFont() );
}

wxSize wxGridCellStringRenderer::DoGetBestSize(wxGridCellAttr& attr,
                                               wxDC& dc,
                                               const wxString& text)
{
    wxCoord x = 0, y = 0, max_x = 0;
    dc.SetFont(attr.GetFont());
    wxStringTokenizer tk(text, _T('\n'));
    while ( tk.HasMoreTokens() )
    {
        dc.GetTextExtent(tk.GetNextToken(), &x, &y);
        max_x = wxMax(max_x, x);
    }

    y *= 1 + text.Freq(wxT('\n')); // multiply by the number of lines.

    return wxSize(max_x, y);
}

wxSize wxGridCellStringRenderer::GetBestSize(wxGrid& grid,
                                             wxGridCellAttr& attr,
                                             wxDC& dc,
                                             int row, int col)
{
    return DoGetBestSize(attr, dc, grid.GetCellValue(row, col));
}

void wxGridCellStringRenderer::Draw(wxGrid& grid,
                                    wxGridCellAttr& attr,
                                    wxDC& dc,
                                    const wxRect& rectCell,
                                    int row, int col,
                                    bool isSelected)
{
    wxRect rect = rectCell;
    rect.Inflate(-1);

    // erase only this cells background, overflow cells should have been erased
    wxGridCellRenderer::Draw(grid, attr, dc, rectCell, row, col, isSelected);

    int hAlign, vAlign;
    attr.GetAlignment(&hAlign, &vAlign);

    int overflowCols = 0;

    if (attr.GetOverflow())
    {
        int cols = grid.GetNumberCols();
        int best_width = GetBestSize(grid,attr,dc,row,col).GetWidth();
        int cell_rows, cell_cols;
        attr.GetSize( &cell_rows, &cell_cols ); // shouldn't get here if <=0
        if ((best_width > rectCell.width) && (col < cols) && grid.GetTable())
        {
            int i, c_cols, c_rows;
            for (i = col+cell_cols; i < cols; i++)
            {
                bool is_empty = true;
                for (int j=row; j<row+cell_rows; j++)
                {
                    // check w/ anchor cell for multicell block
                    grid.GetCellSize(j, i, &c_rows, &c_cols);
                    if (c_rows > 0) c_rows = 0;
                    if (!grid.GetTable()->IsEmptyCell(j+c_rows, i))
                    {
                        is_empty = false;
                        break;
                    }
                }
                if (is_empty)
                    rect.width += grid.GetColSize(i);
                else
                {
                    i--;
                    break;
                }
                if (rect.width >= best_width) break;
            }
            overflowCols = i - col - cell_cols + 1;
            if (overflowCols >= cols) overflowCols = cols - 1;
        }

        if (overflowCols > 0) // redraw overflow cells w/ proper hilight
        {
            hAlign = wxALIGN_LEFT; // if oveflowed then it's left aligned
            wxRect clip = rect;
            clip.x += rectCell.width;
            // draw each overflow cell individually
            int col_end = col+cell_cols+overflowCols;
            if (col_end >= grid.GetNumberCols())
                col_end = grid.GetNumberCols() - 1;
            for (int i = col+cell_cols; i <= col_end; i++)
            {
                clip.width = grid.GetColSize(i) - 1;
                dc.DestroyClippingRegion();
                dc.SetClippingRegion(clip);

                SetTextColoursAndFont(grid, attr, dc,
                        grid.IsInSelection(row,i));

                grid.DrawTextRectangle(dc, grid.GetCellValue(row, col),
                        rect, hAlign, vAlign);
                clip.x += grid.GetColSize(i) - 1;
            }

            rect = rectCell;
            rect.Inflate(-1);
            rect.width++;
            dc.DestroyClippingRegion();
        }
    }

    // now we only have to draw the text