textctrl.cpp

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

    else
    {
        hText = 13 ;
    }
/*
    int cx, cy;
    wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());

    int wText = DEFAULT_ITEM_WIDTH;

    int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);

    return wxSize(wText, hText);
*/
    if ( m_windowStyle & wxTE_MULTILINE )
    {
         hText *= 5 ;
    }
    hText += 2 * m_macVerticalBorder ;
    wText += 2 * m_macHorizontalBorder ;
    //else: for single line control everything is ok
    return wxSize(wText, hText);
}

// ----------------------------------------------------------------------------
// Undo/redo
// ----------------------------------------------------------------------------

void wxTextCtrl::Undo()
{
    if (CanUndo())
    {
        if ( m_macUsesTXN )
        {
            TXNUndo((TXNObject)m_macTXN);
        }
    }
}

void wxTextCtrl::Redo()
{
    if (CanRedo())
    {
        if ( m_macUsesTXN )
        {
            TXNRedo((TXNObject)m_macTXN);
        }
    }
}

bool wxTextCtrl::CanUndo() const
{
    if ( !IsEditable() )
    {
        return false ;
    }
    if ( m_macUsesTXN )
    {
        return TXNCanUndo((TXNObject)m_macTXN,NULL);
    }
    return false ;
}

bool wxTextCtrl::CanRedo() const
{
    if ( !IsEditable() )
    {
        return false ;
    }
    if ( m_macUsesTXN )
    {
        return TXNCanRedo((TXNObject)m_macTXN,NULL);
    }
    return false ;
}

// Makes modifie or unmodified
void wxTextCtrl::MarkDirty()
{
    m_dirty = true;
}

void wxTextCtrl::DiscardEdits()
{
    m_dirty = false;
}

int wxTextCtrl::GetNumberOfLines() const
{
    if ( m_macUsesTXN )
    {
        ItemCount lines ;
        TXNGetLineCount((TXNObject)m_macTXN, &lines ) ;
        return lines ;
    }
    else
    {
        wxString content = GetValue() ;

        int count = 1;
        for (size_t i = 0; i < content.length() ; i++)
        {
            if (content[i] == '\r') count++;
        }
        return count;
    }
}

long wxTextCtrl::XYToPosition(long x, long y) const
{
    // TODO
    return 0;
}

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

void wxTextCtrl::ShowPosition(long pos)
{
#if TARGET_RT_MAC_MACHO && defined(AVAILABLE_MAC_OS_X_VERSION_10_2_AND_LATER)
    if ( m_macUsesTXN )
    {
        Point current ;
        Point desired ;
        TXNOffset selstart , selend ;
        TXNGetSelection(  (TXNObject) m_macTXN , &selstart , &selend) ;
        TXNOffsetToPoint( (TXNObject) m_macTXN,  selstart , &current);
        TXNOffsetToPoint( (TXNObject) m_macTXN,  pos , &desired);
        //TODO use HIPoints for 10.3 and above
        if ( (UInt32) TXNScroll != (UInt32) kUnresolvedCFragSymbolAddress )
        {
            OSErr theErr = noErr;
            SInt32 dv = desired.v - current.v ;
            SInt32 dh = desired.h - current.h ;
            TXNShowSelection(  (TXNObject) m_macTXN , true ) ;
            theErr = TXNScroll( (TXNObject) m_macTXN, kTXNScrollUnitsInPixels , kTXNScrollUnitsInPixels , &dv , &dh );
            wxASSERT_MSG( theErr == noErr, _T("TXNScroll returned an error!") );
        }
    }
#endif
}

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

    // 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;
}

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

    // 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 ;
}

/*
 * Text item
 */

void wxTextCtrl::Command(wxCommandEvent & event)
{
    SetValue (event.GetString());
    ProcessCommand (event);
}

void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
{
    // By default, load the first file into the text window.
    if (event.GetNumberOfFiles() > 0)
    {
        LoadFile(event.GetFiles()[0]);
    }
}

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

    if ( key == 'c' && event.MetaDown() )
    {
        if ( CanCopy() )
            Copy() ;
        return ;
    }

    if ( !IsEditable() && key != WXK_LEFT && key != WXK_RIGHT && key != WXK_DOWN && key != WXK_UP && key != WXK_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 ;
    }

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

    if ( key == 'v' && event.MetaDown() )
    {
        if ( CanPaste() )
            Paste() ;
        return ;
    }
    if ( key == 'x' && event.MetaDown() )
    {
        if ( CanCut() )
            Cut() ;
        return ;
    }
    switch ( key )
    {
        case WXK_RETURN:
            if (m_windowStyle & wxTE_PROCESS_ENTER)
            {
                wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
                event.SetEventObject( this );
                event.SetString( GetValue() );
                if ( GetEventHandler()->ProcessEvent(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_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) or the tab will not
                // be inserted.
                WriteText(wxT("\t"));
            }
            break;
    }

    if (!eat_key)
    {
        // perform keystroke handling
#if TARGET_CARBON
        if ( m_macUsesTXN && wxTheApp->MacGetCurrentEvent() != NULL && wxTheApp->MacGetCurrentEventHandlerCallRef() != NULL )
            CallNextEventHandler((EventHandlerCallRef)wxTheApp->MacGetCurrentEventHandlerCallRef() , (EventRef) wxTheApp->MacGetCurrentEvent() ) ;
        else
        {
            EventRecord rec ;
            if ( wxMacConvertEventToRecord(  (EventRef) wxTheApp->MacGetCurrentEvent() , &rec ) )
            {
                EventRecord *ev = &rec ;
                short keycode ;
                short keychar ;
                keychar = short(ev->message & charCodeMask);
                keycode = short(ev->message & keyCodeMask) >> 8 ;

                ::HandleControlKey( (ControlHandle) m_macControl , keycode , keychar , ev->modifiers ) ;
            }
        }
#else
        EventRecord *ev = (EventRecord*) wxTheApp->MacGetCurrentEvent() ;
        short keycode ;
        short keychar ;
        keychar = short(ev->message & charCodeMask);
        keycode = short(ev->message & keyCodeMask) >> 8 ;

        ::HandleControlKey( (ControlHandle) m_macControl , keycode , keychar , ev->modifiers ) ;
#endif
    }
    if ( ( key >= 0x20 && key < WXK_START ) ||
         key == WXK_RETURN ||
         key == WXK_DELETE ||
         key == WXK_BACK)
    {
        wxCommandEvent event1(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
        event1.SetEventObject( this );
        wxPostEvent(GetEventHandler(),event1);
    }
}

void  wxTextCtrl::MacSuperShown( bool show )
{
    bool former = m_macControlIsShown ;
    wxControl::MacSuperShown( show ) ;
    if ( (former != m_macControlIsShown) && m_macUsesTXN )
    {
        if ( m_macControlIsShown )
            TXNSetFrameBounds( (TXNObject) m_macTXN, (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.top, (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.left,
                (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.bottom,(**(STPTextPaneVars **)m_macTXNvars).fRTextArea.right, (**(STPTextPaneVars **)m_macTXNvars).fTXNFrame);
        else
            TXNSetFrameBounds( (TXNObject) m_macTXN, (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.top + 30000, (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.left,
               (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.bottom + 30000, (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.right, (**(STPTextPaneVars **)m_macTXNvars).fTXNFrame);
    }
}

bool  wxTextCtrl::Show(bool show)
{
    bool former = m_macControlIsShown ;

    bool retval = wxControl::Show( show ) ;

    if ( former != m_macControlIsShown && m_macUsesTXN )
    {
        if ( m_macControlIsShown )
            TXNSetFrameBounds( (TXNObject) m_macTXN, (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.top, (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.left,
                (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.bottom,(**(STPTextPaneVars **)m_macTXNvars).fRTextArea.right, (**(STPTextPaneVars **)m_macTXNvars).fTXNFrame);
        else
            TXNSetFrameBounds( (TXNObject) m_macTXN, (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.top + 30000, (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.left,
               (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.bottom + 30000, (**(STPTextPaneVars **)m_macTXNvars).fRTextArea.right, (**(STPTextPaneVars **)m_macTXNvars).fTXNFrame);
    }

    return retval ;
}

// ----------------------------------------------------------------------------
// 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::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() );
}

bool wxTextCtrl::MacSetupCursor( const wxPoint& pt )
{
    if ( m_macUsesTXN )
        return true ;
    else
        return wxWindow::MacSetupCursor( pt ) ;
}

#endif
    // wxUSE_TEXTCTRL