textctrl.cpp

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

            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_COMMAND_BUTTON_CLICKED, 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) ;
    }

    if ( ( key >= 0x20 && key < WXK_START ) ||
         ( key >= WXK_NUMPAD0 && key <= WXK_DIVIDE ) ||
         key == WXK_RETURN ||
         key == WXK_DELETE ||
         key == WXK_BACK)
    {
        wxCommandEvent event1(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
        event1.SetEventObject( this );
        wxPostEvent( GetEventHandler(), event1 );
    }
}

// ----------------------------------------------------------------------------
// standard handlers for standard edit menu events
// ----------------------------------------------------------------------------

void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
{
    Cut();
}

void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
{
    Copy();
}

void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
{
    Paste();
}

void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
{
    Undo();
}

void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
{
    Redo();
}

void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
{
    long from, to;

    GetSelection( &from, &to );
    if (from != -1 && to != -1)
        Remove( from, to );
}

void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
{
    SetSelection(-1, -1);
}

void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
{
    event.Enable( CanCut() );
}

void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
{
    event.Enable( CanCopy() );
}

void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
{
    event.Enable( CanPaste() );
}

void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
{
    event.Enable( CanUndo() );
}

void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
{
    event.Enable( CanRedo() );
}

void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
{
    long from, to;

    GetSelection( &from, &to );
    event.Enable( from != -1 && to != -1 && from != to && IsEditable() ) ;
}

void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
{
    event.Enable(GetLastPosition() > 0);
}

// CS: Context Menus only work with MLTE implementations or non-multiline HIViews at the moment

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

    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"));
    }

    if (m_privateContextMenu != NULL)
        PopupMenu(m_privateContextMenu);
}

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

#if !TARGET_API_MAC_OSX

// user pane implementation

void wxTextCtrl::MacControlUserPaneDrawProc(wxInt16 part)
{
    GetPeer()->MacControlUserPaneDrawProc( part ) ;
}

wxInt16 wxTextCtrl::MacControlUserPaneHitTestProc(wxInt16 x, wxInt16 y)
{
    return GetPeer()->MacControlUserPaneHitTestProc( x , y ) ;
}

wxInt16 wxTextCtrl::MacControlUserPaneTrackingProc(wxInt16 x, wxInt16 y, void* actionProc)
{
    return GetPeer()->MacControlUserPaneTrackingProc( x , y , actionProc ) ;
}

void wxTextCtrl::MacControlUserPaneIdleProc()
{
    GetPeer()->MacControlUserPaneIdleProc( ) ;
}

wxInt16 wxTextCtrl::MacControlUserPaneKeyDownProc(wxInt16 keyCode, wxInt16 charCode, wxInt16 modifiers)
{
    return GetPeer()->MacControlUserPaneKeyDownProc( keyCode , charCode , modifiers ) ;
}

void wxTextCtrl::MacControlUserPaneActivateProc(bool activating)
{
    GetPeer()->MacControlUserPaneActivateProc( activating ) ;
}

wxInt16 wxTextCtrl::MacControlUserPaneFocusProc(wxInt16 action)
{
    return GetPeer()->MacControlUserPaneFocusProc( action ) ;
}

void wxTextCtrl::MacControlUserPaneBackgroundProc(void* info)
{
    GetPeer()->MacControlUserPaneBackgroundProc( info ) ;
}

#endif

// ----------------------------------------------------------------------------
// implementation base class
// ----------------------------------------------------------------------------

wxMacTextControl::wxMacTextControl(wxTextCtrl* peer) :
    wxMacControl( peer )
{
}

wxMacTextControl::~wxMacTextControl()
{
}

void wxMacTextControl::SetStyle(long start, long end, const wxTextAttr& style)
{
}

void wxMacTextControl::Copy()
{
}

void wxMacTextControl::Cut()
{
}

void wxMacTextControl::Paste()
{
}

bool wxMacTextControl::CanPaste() const
{
    return false ;
}

void wxMacTextControl::SetEditable(bool editable)
{
}

wxTextPos wxMacTextControl::GetLastPosition() const
{
    return GetStringValue().length() ;
}

void wxMacTextControl::Replace( long from , long to , const wxString &val )
{
    SetSelection( from , to ) ;
    WriteText( val ) ;
}

void wxMacTextControl::Remove( long from , long to )
{
    SetSelection( from , to ) ;
    WriteText( wxEmptyString) ;
}

void wxMacTextControl::Clear()
{
    SetStringValue( wxEmptyString ) ;
}

bool wxMacTextControl::CanUndo() const
{
    return false ;
}

void wxMacTextControl::Undo()
{
}

bool wxMacTextControl::CanRedo()  const
{
    return false ;
}

void wxMacTextControl::Redo()
{
}

long wxMacTextControl::XYToPosition(long x, long y) const
{
    return 0 ;
}

bool wxMacTextControl::PositionToXY(long pos, long *x, long *y) const
{
    return false ;
}

void wxMacTextControl::ShowPosition( long WXUNUSED(pos) )
{
}

int wxMacTextControl::GetNumberOfLines() const
{
    ItemCount lines = 0 ;
    wxString content = GetStringValue() ;
    lines = 1;

    for (size_t i = 0; i < content.length() ; i++)
    {
        if (content[i] == '\r')
            lines++;
    }

    return lines ;
}

wxString wxMacTextControl::GetLineText(long lineNo) const
{
    // TODO: change this if possible to reflect real lines
    wxString content = GetStringValue() ;

    // Find line first
    int count = 0;
    for (size_t i = 0; i < content.length() ; i++)
    {
        if (count == lineNo)
        {
            // Add chars in line then
            wxString tmp;

            for (size_t j = i; j < content.length(); j++)
            {
                if (content[j] == '\n')
                    return tmp;

                tmp += content[j];
            }

            return tmp;
        }

        if (content[i] == '\n')
            count++;
    }

    return wxEmptyString ;
}

int wxMacTextControl::GetLineLength(long lineNo) const
{
    // TODO: change this if possible to reflect real lines
    wxString content = GetStringValue() ;

    // Find line first
    int count = 0;
    for (size_t i = 0; i < content.length() ; i++)
    {
        if (count == lineNo)
        {
            // Count chars in line then
            count = 0;
            for (size_t j = i; j < content.length(); j++)
            {
                count++;
                if (content[j] == '\n')
                    return count;
            }

            return count;
        }

        if (content[i] == '\n')
            count++;
    }

    return 0 ;
}

// ----------------------------------------------------------------------------
// standard unicode control implementation
// ----------------------------------------------------------------------------

#if TARGET_API_MAC_OSX

// the current unicode textcontrol implementation has a bug : only if the control
// is currently having the focus, the selection can be retrieved by the corresponding
// data tag. So we have a mirroring using a member variable
// TODO : build event table using virtual member functions for wxMacControl

static const EventTypeSpec unicodeTextControlEventList[] =
{
    { kEventClassControl , kEventControlSetFocusPart } ,
} ;

static pascal OSStatus wxMacUnicodeTextControlControlEventHandler( EventHandlerCallRef handler , EventRef event , void *data )
{
    OSStatus result = eventNotHandledErr ;
    wxMacUnicodeTextControl* focus = (wxMacUnicodeTextControl*) data ;
    wxMacCarbonEvent cEvent( event ) ;

    switch ( GetEventKind( event ) )
    {
        case kEventControlSetFocusPart :
        {
            ControlPartCode controlPart = cEvent.GetParameter<ControlPartCode>(kEventParamControlPart , typeControlPartCode );
            if ( controlPart == kControlFocusNoPart )
            {
                // about to loose focus -> store selection to field
                focus->GetData<ControlEditTextSelectionRec>( 0, kControlEditTextSelectionTag, &focus->m_selection );
            }
            result = CallNextEventHandler(handler,event) ;
            if ( controlPart != kControlFocusNoPart )
            {
                // about to gain focus -> set selection from field
                focus->SetData<ControlEditTextSelectionRec>( 0, kControlEditTextSelectionTag, &focus->m_selection );
            }
            break;
        }
        default:
            break ;
    }

    return result ;
}

static pascal OSStatus wxMacUnicodeTextControlEventHandler( EventHandlerCallRef handler , EventRef event , void *data )
{
    OSStatus result = eventNotHandledErr ;

    switch ( GetEventClass( event ) )
    {
        case kEventClassControl :
            result = wxMacUnicodeTextControlControlEventHandler( handler , event , data ) ;
            break ;

        default :
            break ;
    }
    return result ;
}

DEFINE_ONE_SHOT_HANDLER_GETTER( wxMacUnicodeTextControlEventHandler )

wxMacUnicodeTextControl::wxMacUnicodeTextControl( wxTextCtrl *wxPeer,
    const wxString& str,
    const wxPoint& pos,
    const wxSize& size, long style )
    : wxMacTextControl( wxPeer )
{
    m_font = wxPeer->GetFont() ;
    m_windowStyle = style ;
    Rect bounds = wxMacGetBoundsForControl( wxPeer , pos , size ) ;
    wxString st = str ;
    wxMacConvertNewlines10To13( &st ) ;
    wxMacCFStringHolder cf(st , m_font.GetEncoding()) ;
    CFStringRef cfr = cf ;
    Boolean isPassword = ( m_windowStyle & wxTE_PASSWORD ) != 0 ;
    m_valueTag = isPassword ? kControlEditTextPasswordCFStringTag : kControlEditTextCFStringTag ;

    OSStatus err = CreateEditUnicodeTextControl(
        MAC_WXHWND(wxPeer->MacGetTopLevelWindowRef()), &bounds , cfr ,
        isPassword , NULL , &m_controlRef ) ;
    verify_noerr( err );

    if ( !(m_windowStyle & wxTE_MULTILINE) )
        SetData<Boolean>( kControlEditTextPart , kControlEditTextSingleLineTag , true ) ;

    InstallControlEventHandler( m_controlRef , GetwxMacUnicodeTextControlEventHandlerUPP(),