C++ GetTextPeer函数代码示例

void wxTextEntry::Cut()
{
    wxCHECK_RET( GetTextPeer(), "Must create the control first" );

    if (CanCut())
        GetTextPeer()->Cut() ;
}

bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
{
    if (GetTextPeer())
        GetTextPeer()->SetStyle( start , end , style ) ;

    return true ;
}

bool wxTextEntry::CanRedo() const
{
    if ( !IsEditable() )
        return false ;

    wxCHECK_MSG( GetTextPeer(), false, "Must create the control first" );

    return GetTextPeer()->CanRedo() ;
}

bool wxTextCtrl::SetHint(const wxString& hint)
{
    m_hintString = hint;
    
    if ( GetTextPeer() && GetTextPeer()->SetHint(hint) )
        return true;
    
    return false;
}

void wxTextCtrl::OnContextMenu(wxContextMenuEvent& event)
{
    if ( GetTextPeer()->HasOwnContextMenu() )
    {
        event.Skip() ;
        return ;
    }

#if wxUSE_MENUS
    if (m_privateContextMenu == NULL)
    {
        m_privateContextMenu = new wxMenu;
        m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
        m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
        m_privateContextMenu->AppendSeparator();
        m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
        m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
        m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
        m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
        m_privateContextMenu->AppendSeparator();
        m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
    }

    PopupMenu(m_privateContextMenu);
#endif
}

bool wxTextCtrl::MacSetupCursor( const wxPoint& pt )
{
    if ( !GetTextPeer()->SetupCursor( pt ) )
        return wxWindow::MacSetupCursor( pt ) ;
    else
        return true ;
}

bool wxTextCtrl::Create( wxWindow *parent,
    wxWindowID id,
    const wxString& str,
    const wxPoint& pos,
    const wxSize& size,
    long style,
    const wxValidator& validator,
    const wxString& name )
{
    DontCreatePeer();
    m_editable = true ;

    if ( ! (style & wxNO_BORDER) )
        style = (style & ~wxBORDER_MASK) | wxSUNKEN_BORDER ;

    if ( !wxTextCtrlBase::Create( parent, id, pos, size, style & ~(wxHSCROLL | wxVSCROLL), validator, name ) )
        return false;

    if ( m_windowStyle & wxTE_MULTILINE )
    {
        // always turn on this style for multi-line controls
        m_windowStyle |= wxTE_PROCESS_ENTER;
        style |= wxTE_PROCESS_ENTER ;
    }


    SetPeer(wxWidgetImpl::CreateTextControl( this, GetParent(), GetId(), str, pos, size, style, GetExtraStyle() ));

    MacPostControlCreate(pos, size) ;

#if wxOSX_USE_COCOA
    // under carbon everything can already be set before the MacPostControlCreate embedding takes place
    // but under cocoa for single line textfields this only works after everything has been set up
    GetTextPeer()->SetStringValue(str);
#endif

    // only now the embedding is correct and we can do a positioning update

    MacSuperChangedPosition() ;

    if ( m_windowStyle & wxTE_READONLY)
        SetEditable( false ) ;

    SetCursor( wxCursor( wxCURSOR_IBEAM ) ) ;

    return true;
}

void wxTextCtrl::OSXEnableAutomaticDashSubstitution(bool enable)
{
    GetTextPeer()->EnableAutomaticDashSubstitution(enable);
}

void wxTextCtrl::OnChar(wxKeyEvent& event)
{
    int key = event.GetKeyCode() ;
    bool eat_key = false ;
    long from, to;

    if ( !IsEditable() && !event.IsKeyInCategory(WXK_CATEGORY_ARROW | WXK_CATEGORY_TAB) &&
        !( key == WXK_RETURN && ( (m_windowStyle & wxTE_PROCESS_ENTER) || (m_windowStyle & wxTE_MULTILINE) ) )
//        && key != WXK_PAGEUP && key != WXK_PAGEDOWN && key != WXK_HOME && key != WXK_END
        )
    {
        // eat it
        return ;
    }

    if ( !GetTextPeer()->CanClipMaxLength() )
    {
        // Check if we have reached the max # of chars (if it is set), but still
        // allow navigation and deletion
        GetSelection( &from, &to );
        if ( !IsMultiLine() && m_maxLength && GetValue().length() >= m_maxLength &&
            !event.IsKeyInCategory(WXK_CATEGORY_ARROW | WXK_CATEGORY_TAB | WXK_CATEGORY_CUT) &&
            !( key == WXK_RETURN && (m_windowStyle & wxTE_PROCESS_ENTER) ) &&
            from == to )
        {
            // eat it, we don't want to add more than allowed # of characters

            // TODO: generate EVT_TEXT_MAXLEN()
            return;
        }
    }

    // assume that any key not processed yet is going to modify the control
    m_dirty = true;

    switch ( key )
    {
        case WXK_RETURN:
            if (m_windowStyle & wxTE_PROCESS_ENTER)
            {
                wxCommandEvent event(wxEVT_TEXT_ENTER, m_windowId);
                event.SetEventObject( this );
                event.SetString( GetValue() );
                if ( HandleWindowEvent(event) )
                    return;
            }

            if ( !(m_windowStyle & wxTE_MULTILINE) )
            {
                wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
                if ( tlw && tlw->GetDefaultItem() )
                {
                    wxButton *def = wxDynamicCast(tlw->GetDefaultItem(), wxButton);
                    if ( def && def->IsEnabled() )
                    {
                        wxCommandEvent event(wxEVT_BUTTON, def->GetId() );
                        event.SetEventObject(def);
                        def->Command(event);

                        return ;
                    }
                }

                // this will make wxWidgets eat the ENTER key so that
                // we actually prevent line wrapping in a single line text control
                eat_key = true;
            }
            break;

        case WXK_TAB:
            if ( !(m_windowStyle & wxTE_PROCESS_TAB))
            {
                int flags = 0;
                if (!event.ShiftDown())
                    flags |= wxNavigationKeyEvent::IsForward ;
                if (event.ControlDown())
                    flags |= wxNavigationKeyEvent::WinChange ;
                Navigate(flags);

                return;
            }
            else
            {
                // This is necessary (don't know why);
                // otherwise the tab will not be inserted.
                WriteText(wxT("\t"));
                eat_key = true;
            }
            break;

        default:
            break;
    }

    if (!eat_key)
    {
        // perform keystroke handling
        event.Skip(true) ;
    }

//.........这里部分代码省略.........

bool wxTextEntry::SetHint(const wxString& hint)
{
    m_hintString = hint;
    return GetTextPeer() && GetTextPeer()->SetHint(hint);
}