grid.cpp

来自「A*算法 A*算法 A*算法 A*算法A*算法A*算法」· C++ 代码 · 共 2,252 行 · 第 1/5 页

// wxGridCellEditor
// ----------------------------------------------------------------------------

wxGridCellEditor::wxGridCellEditor()
{
    m_control = NULL;
    m_attr = NULL;
}


wxGridCellEditor::~wxGridCellEditor()
{
    Destroy();
}

void wxGridCellEditor::Create(wxWindow* WXUNUSED(parent),
                              wxWindowID WXUNUSED(id),
                              wxEvtHandler* evtHandler)
{
    if ( evtHandler )
        m_control->PushEventHandler(evtHandler);
}

void wxGridCellEditor::PaintBackground(const wxRect& rectCell,
                                       wxGridCellAttr *attr)
{
    // erase the background because we might not fill the cell
    wxClientDC dc(m_control->GetParent());
    wxGridWindow* gridWindow = wxDynamicCast(m_control->GetParent(), wxGridWindow);
    if (gridWindow)
        gridWindow->GetOwner()->PrepareDC(dc);

    dc.SetPen(*wxTRANSPARENT_PEN);
    dc.SetBrush(wxBrush(attr->GetBackgroundColour(), wxSOLID));
    dc.DrawRectangle(rectCell);

    // redraw the control we just painted over
    m_control->Refresh();
}

void wxGridCellEditor::Destroy()
{
    if (m_control)
    {
        m_control->PopEventHandler(true /* delete it*/);

        m_control->Destroy();
        m_control = NULL;
    }
}

void wxGridCellEditor::Show(bool show, wxGridCellAttr *attr)
{
    wxASSERT_MSG(m_control,
                 wxT("The wxGridCellEditor must be Created first!"));
    m_control->Show(show);

    if ( show )
    {
        // set the colours/fonts if we have any
        if ( attr )
        {
            m_colFgOld = m_control->GetForegroundColour();
            m_control->SetForegroundColour(attr->GetTextColour());

            m_colBgOld = m_control->GetBackgroundColour();
            m_control->SetBackgroundColour(attr->GetBackgroundColour());

// Workaround for GTK+1 font setting problem on some platforms
#if !defined(__WXGTK__) || defined(__WXGTK20__)
            m_fontOld = m_control->GetFont();
            m_control->SetFont(attr->GetFont());
#endif
            // can't do anything more in the base class version, the other
            // attributes may only be used by the derived classes
        }
    }
    else
    {
        // restore the standard colours fonts
        if ( m_colFgOld.Ok() )
        {
            m_control->SetForegroundColour(m_colFgOld);
            m_colFgOld = wxNullColour;
        }

        if ( m_colBgOld.Ok() )
        {
            m_control->SetBackgroundColour(m_colBgOld);
            m_colBgOld = wxNullColour;
        }
// Workaround for GTK+1 font setting problem on some platforms
#if !defined(__WXGTK__) || defined(__WXGTK20__)
        if ( m_fontOld.Ok() )
        {
            m_control->SetFont(m_fontOld);
            m_fontOld = wxNullFont;
        }
#endif
    }
}

void wxGridCellEditor::SetSize(const wxRect& rect)
{
    wxASSERT_MSG(m_control,
                 wxT("The wxGridCellEditor must be Created first!"));
    m_control->SetSize(rect, wxSIZE_ALLOW_MINUS_ONE);
}

void wxGridCellEditor::HandleReturn(wxKeyEvent& event)
{
    event.Skip();
}

bool wxGridCellEditor::IsAcceptedKey(wxKeyEvent& event)
{
    bool ctrl = event.ControlDown();
    bool alt  = event.AltDown();
#ifdef __WXMAC__
    // On the Mac the Alt key is more like shift and is used for entry of
    // valid characters, so check for Ctrl and Meta instead.
    alt = event.MetaDown();
#endif

    // Assume it's not a valid char if ctrl or alt is down, but if both are
    // down then it may be because of an AltGr key combination, so let them
    // through in that case.
    if ((ctrl || alt) && !(ctrl && alt))
        return false;

#if wxUSE_UNICODE
    int key = event.GetUnicodeKey();
    bool keyOk = true;

    // if the unicode key code is not really a unicode character (it may
    // be a function key or etc., the platforms appear to always give us a
    // small value in this case) then fallback to the ascii key code but
    // don't do anything for function keys or etc.
    if (key <= 127)
    {
        key = event.GetKeyCode();
        keyOk = (key <= 127);
    }
    return keyOk;
#else // !wxUSE_UNICODE
    int key = event.GetKeyCode();
    if (key <= 255)
        return true;
    return false;
#endif // wxUSE_UNICODE/!wxUSE_UNICODE
}

void wxGridCellEditor::StartingKey(wxKeyEvent& event)
{
    event.Skip();
}

void wxGridCellEditor::StartingClick()
{
}

#if wxUSE_TEXTCTRL

// ----------------------------------------------------------------------------
// wxGridCellTextEditor
// ----------------------------------------------------------------------------

wxGridCellTextEditor::wxGridCellTextEditor()
{
    m_maxChars = 0;
}

void wxGridCellTextEditor::Create(wxWindow* parent,
                                  wxWindowID id,
                                  wxEvtHandler* evtHandler)
{
    m_control = new wxTextCtrl(parent, id, wxEmptyString,
                               wxDefaultPosition, wxDefaultSize
#if defined(__WXMSW__)
                               , wxTE_PROCESS_TAB | wxTE_AUTO_SCROLL
#endif
                              );

    // set max length allowed in the textctrl, if the parameter was set
    if (m_maxChars != 0)
    {
        ((wxTextCtrl*)m_control)->SetMaxLength(m_maxChars);
    }

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

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

void wxGridCellTextEditor::SetSize(const wxRect& rectOrig)
{
    wxRect rect(rectOrig);

    // Make the edit control large enough to allow for internal
    // margins
    //
    // TODO: remove this if the text ctrl sizing is improved esp. for
    // unix
    //
#if defined(__WXGTK__)
    if (rect.x != 0)
    {
        rect.x += 1;
        rect.y += 1;
        rect.width -= 1;
        rect.height -= 1;
    }
#else // !GTK
    int extra_x = ( rect.x > 2 )? 2 : 1;

// MB: treat MSW separately here otherwise the caret doesn't show
// when the editor is in the first row.
#if defined(__WXMSW__)
    int extra_y = 2;
#else
    int extra_y = ( rect.y > 2 )? 2 : 1;
#endif // MSW

#if defined(__WXMOTIF__)
    extra_x *= 2;
    extra_y *= 2;
#endif
    rect.SetLeft( wxMax(0, rect.x - extra_x) );
    rect.SetTop( wxMax(0, rect.y - extra_y) );
    rect.SetRight( rect.GetRight() + 2*extra_x );
    rect.SetBottom( rect.GetBottom() + 2*extra_y );
#endif // GTK/!GTK

    wxGridCellEditor::SetSize(rect);
}

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

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

    DoBeginEdit(m_startValue);
}

void wxGridCellTextEditor::DoBeginEdit(const wxString& startValue)
{
    Text()->SetValue(startValue);
    Text()->SetInsertionPointEnd();
    Text()->SetSelection(-1,-1);
    Text()->SetFocus();
}

bool wxGridCellTextEditor::EndEdit(int row, int col,
                                   wxGrid* grid)
{
    wxASSERT_MSG(m_control,
                 wxT("The wxGridCellEditor must be Created first!"));

    bool changed = false;
    wxString value = Text()->GetValue();
    if (value != m_startValue)
        changed = true;

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

    m_startValue = wxEmptyString;
    // No point in setting the text of the hidden control
    //Text()->SetValue(m_startValue);

    return changed;
}


void wxGridCellTextEditor::Reset()
{
    wxASSERT_MSG(m_control,
                 wxT("The wxGridCellEditor must be Created first!"));

    DoReset(m_startValue);
}

void wxGridCellTextEditor::DoReset(const wxString& startValue)
{
    Text()->SetValue(startValue);
    Text()->SetInsertionPointEnd();
}

bool wxGridCellTextEditor::IsAcceptedKey(wxKeyEvent& event)
{
    return wxGridCellEditor::IsAcceptedKey(event);
}

void wxGridCellTextEditor::StartingKey(wxKeyEvent& event)
{
    // Since this is now happening in the EVT_CHAR event EmulateKeyPress is no
    // longer an appropriate way to get the character into the text control.
    // Do it ourselves instead.  We know that if we get this far that we have
    // a valid character, so not a whole lot of testing needs to be done.

    wxTextCtrl* tc = Text();
    wxChar ch;
    long pos;

#if wxUSE_UNICODE
    ch = event.GetUnicodeKey();
    if (ch <= 127)
        ch = (wxChar)event.GetKeyCode();
#else
    ch = (wxChar)event.GetKeyCode();
#endif
    switch (ch)
    {
        case WXK_DELETE:
            // delete the character at the cursor
            pos = tc->GetInsertionPoint();
            if (pos < tc->GetLastPosition())
                tc->Remove(pos, pos+1);
            break;

        case WXK_BACK:
            // delete the character before the cursor
            pos = tc->GetInsertionPoint();
            if (pos > 0)
                tc->Remove(pos-1, pos);
            break;

        default:
            tc->WriteText(ch);
            break;
    }
}

void wxGridCellTextEditor::HandleReturn( wxKeyEvent&
                                         WXUNUSED_GTK(WXUNUSED_MOTIF(event)) )
{
#if defined(__WXMOTIF__) || defined(__WXGTK__)
    // wxMotif needs a little extra help...
    size_t pos = (size_t)( Text()->GetInsertionPoint() );
    wxString s( Text()->GetValue() );
    s = s.Left(pos) + wxT("\n") + s.Mid(pos);
    Text()->SetValue(s);
    Text()->SetInsertionPoint( pos );
#else
    // the other ports can handle a Return key press
    //
    event.Skip();
#endif
}

void wxGridCellTextEditor::SetParameters(const wxString& params)
{
    if ( !params )
    {
        // reset to default
        m_maxChars = 0;
    }
    else
    {
        long tmp;
        if ( !params.ToLong(&tmp) )
        {
            wxLogDebug(_T("Invalid wxGridCellTextEditor parameter string '%s' ignored"), params.c_str());
        }
        else
        {
            m_maxChars = (size_t)tmp;
        }
    }
}

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

// ----------------------------------------------------------------------------
// wxGridCellNumberEditor
// ----------------------------------------------------------------------------

wxGridCellNumberEditor::wxGridCellNumberEditor(int min, int max)
{
    m_min = min;
    m_max = max;
}

void wxGridCellNumberEditor::Create(wxWindow* parent,
                                    wxWindowID id,
                                    wxEvtHandler* evtHandler)
{
#if wxUSE_SPINCTRL
    if ( HasRange() )
    {
        // create a spin ctrl
        m_control = new wxSpinCtrl(parent, wxID_ANY, wxEmptyString,
                                   wxDefaultPosition, wxDefaultSize,
                                   wxSP_ARROW_KEYS,
                                   m_min, m_max);

        wxGridCellEditor::Create(parent, id, evtHandler);
    }
    else
#endif
    {
        // just a text control
        wxGridCellTextEditor::Create(parent, id, evtHandler);

#if wxUSE_VALIDATORS
        Text()->SetValidator(wxTextValidator(wxFILTER_NUMERIC));
#endif // wxUSE_VALIDATORS
    }
}

void wxGridCellNumberEditor::BeginEdit(int row, int col, wxGrid* grid)
{
    // first get the value
    wxGridTableBase *table = grid->GetTable();
    if ( table->CanGetValueAs(row, col, wxGRID_VALUE_NUMBER) )
    {
        m_valueOld = table->GetValueAsLong(row, col);
    }
    else
    {
        m_valueOld = 0;
        wxString sValue = table->GetValue(row, col);
        if (! sValue.ToLong(&m_valueOld) && ! sValue.empty())
        {
            wxFAIL_MSG( _T("this cell doesn't have numeric value") );
            return;
        }
    }

#if wxUSE_SPINCTRL
    if ( HasRange() )
    {
        Spin()->SetValue((int)m_valueOld);
        Spin()->SetFocus();
    }
    else
#endif
    {
        DoBeginEdit(GetString());
    }