listbox.cpp

wxWidgets 是一个跨平台的 GUI 框架。它给开发人员提供了统一的接口

    m_stringArray.Empty() ;
    m_dataArray.Empty() ;
    MacClear() ;
}

void wxListBox::DoSetSelection(int N, bool select)
{
    wxCHECK_RET( IsValid(N),
        wxT("invalid index in wxListBox::SetSelection") );
    MacSetSelection( N , select ) ;
    GetSelections( m_selectionPreImage ) ;
}

bool wxListBox::IsSelected(int N) const
{
    wxCHECK_MSG( IsValid(N), false,
        wxT("invalid index in wxListBox::Selected") );

    return MacIsSelected( N ) ;
}

void *wxListBox::DoGetItemClientData(unsigned int n) const
{
    wxCHECK_MSG( IsValid(n), NULL,
        wxT("invalid index in wxListBox::GetClientData"));

    return (void *)m_dataArray[n];
}

wxClientData *wxListBox::DoGetItemClientObject(unsigned int n) const
{
    return (wxClientData *) DoGetItemClientData( n ) ;
}

void wxListBox::DoSetItemClientData(unsigned int n, void *Client_data)
{
    wxCHECK_RET( IsValid(n),
        wxT("invalid index in wxListBox::SetClientData") );

#if wxUSE_OWNER_DRAWN
    if ( m_windowStyle & wxLB_OWNERDRAW )
    {
        // client data must be pointer to wxOwnerDrawn, otherwise we would crash
        // in OnMeasure/OnDraw.
        wxFAIL_MSG(wxT("Can't use client data with owner-drawn listboxes"));
    }
#endif // wxUSE_OWNER_DRAWN
    wxASSERT_MSG( m_dataArray.GetCount() >= (unsigned int) n , wxT("invalid client_data array") ) ;

    if ( m_dataArray.GetCount() > (size_t) n )
    {
        m_dataArray[n] = (char*) Client_data ;
    }
    else
    {
        m_dataArray.Add( (char*) Client_data ) ;
    }
}

void wxListBox::DoSetItemClientObject(unsigned int n, wxClientData* clientData)
{
    DoSetItemClientData(n, clientData);
}

// Return number of selections and an array of selected integers
int wxListBox::GetSelections(wxArrayInt& aSelections) const
{
    return MacGetSelections( aSelections ) ;
}

// Get single selection, for single choice list items
int wxListBox::GetSelection() const
{
    return MacGetSelection() ;
}

// Find string for position
wxString wxListBox::GetString(unsigned int n) const
{
    return m_stringArray[n]  ;
}

void wxListBox::DoInsertItems(const wxArrayString& items, unsigned int pos)
{
    wxCHECK_RET( IsValidInsert(pos),
        wxT("invalid index in wxListBox::InsertItems") );

    InvalidateBestSize();

    unsigned int nItems = items.GetCount();

    for ( unsigned int i = 0 ; i < nItems ; i++ )
    {
        m_stringArray.Insert( items[i] , pos + i ) ;
        m_dataArray.Insert( NULL , pos + i ) ;
        MacInsert( pos + i , items[i] ) ;
    }

    m_noItems += nItems;
}

void wxListBox::SetString(unsigned int n, const wxString& s)
{
    m_stringArray[n] = s;
    MacSet(n, s);
}

wxSize wxListBox::DoGetBestSize() const
{
    int lbWidth = 100;  // some defaults
    int lbHeight = 110;
    int wLine;

    {
        wxMacPortStateHelper st( UMAGetWindowPort( (WindowRef) MacGetRootWindow() ) ) ;

        if ( m_font.Ok() )
        {
            ::TextFont( m_font.GetMacFontNum() ) ;
            ::TextSize( m_font.GetMacFontSize() ) ;
            ::TextFace( m_font.GetMacFontStyle() ) ;
        }
        else
        {
            ::TextFont( kFontIDMonaco ) ;
            ::TextSize( 9  );
            ::TextFace( 0 ) ;
        }

        // Find the widest line
        for(unsigned int i = 0; i < GetCount(); i++) {
            wxString str(GetString(i));
        #if wxUSE_UNICODE
            Point bounds={0,0} ;
            SInt16 baseline ;
            ::GetThemeTextDimensions( wxMacCFStringHolder( str , m_font.GetEncoding() ) ,
                kThemeCurrentPortFont,
                kThemeStateActive,
                false,
                &bounds,
                &baseline );
            wLine = bounds.h ;
        #else
            wLine = ::TextWidth( str.c_str() , 0 , str.length() ) ;
        #endif
            lbWidth = wxMax(lbWidth, wLine);
        }

        // Add room for the scrollbar
        lbWidth += wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);

        // And just a bit more
        int cy = 12 ;
        int cx = ::TextWidth( "X" , 0 , 1 ) ;
        lbWidth += cx ;

        // don't make the listbox too tall (limit height to around 10 items) but don't
        // make it too small neither
        lbHeight = (cy+4) * wxMin(wxMax(GetCount(), 3), 10);
    }
    return wxSize(lbWidth, lbHeight);
}

unsigned int wxListBox::GetCount() const
{
    return m_noItems;
}

void wxListBox::SetupColours()
{
    SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
    SetForegroundColour(GetParent()->GetForegroundColour());
}

void wxListBox::Refresh(bool eraseBack, const wxRect *rect)
{
    wxControl::Refresh( eraseBack , rect ) ;
    //    MacRedrawControl() ;
}

#if wxUSE_OWNER_DRAWN

class wxListBoxItem : public wxOwnerDrawn
{
public:
    wxListBoxItem(const wxString& str = wxEmptyString);
};

wxListBoxItem::wxListBoxItem(const wxString& str) : wxOwnerDrawn(str, false)
{
    // no bitmaps/checkmarks
    SetMarginWidth(0);
}

wxOwnerDrawn *wxListBox::CreateItem(size_t n)
{
    return new wxListBoxItem();
}

#endif  //USE_OWNER_DRAWN

// ============================================================================
// list box control implementation
// ============================================================================

/*
void MacDrawStringCell(Rect *cellRect, Cell lCell, ListHandle theList, long refCon)
{
wxListBox*          list;
// typecast our refCon
list = (wxListBox*)refCon;

  MoveTo(cellRect->left + 4 , cellRect->top + 10 );
  const wxString text = list->m_stringArray[lCell.v] ;
  ::TextFont( kFontIDMonaco ) ;
  ::TextSize( 9  );
  ::TextFace( 0 ) ;
  DrawText(text, 0 , text.length());

    }
*/
void wxListBox::MacDelete( int N )
{
    LDelRow( 1 , N , (ListHandle)m_macList) ;
    Refresh();
}

void wxListBox::MacInsert( int n , const wxString& text)
{
    Cell cell = { 0 , 0 } ;
    cell.v = n ;
    LAddRow( 1 , cell.v , (ListHandle)m_macList ) ;
    //    LSetCell(text, strlen(text), cell, m_macList);
    Refresh();
}

void wxListBox::MacAppend( const wxString& text)
{
    Cell cell = { 0 , 0 } ;
    cell.v = (**(ListHandle)m_macList).dataBounds.bottom ;
    LAddRow( 1 , cell.v , (ListHandle)m_macList ) ;
    //   LSetCell(text, strlen(text), cell, m_macList);
    Refresh();
}

void wxListBox::MacClear()
{
    LDelRow( (**(ListHandle)m_macList).dataBounds.bottom , 0 ,(ListHandle) m_macList ) ;
    Refresh();
}

void wxListBox::MacSetSelection( int n , bool select )
{
    Cell cell = { 0 , 0 } ;
    if ( ! (m_windowStyle & wxLB_MULTIPLE) )
    {
        if ( LGetSelect( true , &cell , (ListHandle)m_macList ) )
        {
            LSetSelect( false , cell , (ListHandle)m_macList ) ;
        }
    }

    cell.v = n ;
    LSetSelect( select , cell , (ListHandle)m_macList ) ;
    LAutoScroll( (ListHandle)m_macList ) ;
    Refresh();
}

bool wxListBox::MacIsSelected( int n ) const
{
    Cell cell = { 0 , 0 } ;
    cell.v = n ;
    return LGetSelect( false , &cell , (ListHandle)m_macList ) ;
}

void wxListBox::MacDestroy()
{
    //    DisposeExtLDEFInfo( m_macList ) ;
}

int wxListBox::MacGetSelection() const
{
    Cell cell = { 0 , 0 } ;
    if ( LGetSelect( true , &cell , (ListHandle)m_macList ) )
        return cell.v ;
    else
        return -1 ;
}

int wxListBox::MacGetSelections( wxArrayInt& aSelections ) const
{
    int no_sel = 0 ;

    aSelections.Empty();

    Cell cell = { 0 , 0 } ;
    cell.v = 0 ;

    while ( LGetSelect( true , &cell ,(ListHandle) m_macList ) )
    {
        aSelections.Add( cell.v ) ;
        no_sel++ ;
        cell.v++ ;
    }
    return no_sel ;
}

void wxListBox::MacSet( int n , const wxString& text )
{
    // our implementation does not store anything in the list
    // so we just have to redraw
    Cell cell = { 0 , 0 } ;
    cell.v = n ;
    //  LSetCell(text, strlen(text), cell, m_macList);
    Refresh();
}

void wxListBox::MacScrollTo( int n )
{
    // TODO implement scrolling
}

void wxListBox::OnSize( wxSizeEvent &event)
{
    Point pt;

#if TARGET_CARBON
    GetListCellSize((ListHandle)m_macList, &pt);
#else
    pt = (**(ListHandle)m_macList).cellSize ;
#endif
    pt.h =  m_width - 15  ;
    LCellSize( pt , (ListHandle)m_macList ) ;
}

void wxListBox::MacHandleControlClick( WXWidget control , wxInt16 controlpart , bool WXUNUSED(mouseStillDown))
{
    Boolean wasDoubleClick = false ;
    long    result ;

    ::GetControlData( (ControlHandle) m_macControl , kControlNoPart , kControlListBoxDoubleClickTag , sizeof( wasDoubleClick ) , (char*) &wasDoubleClick  , &result ) ;
    if ( !wasDoubleClick )
    {
        MacDoClick() ;
    }
    else
    {
        MacDoDoubleClick() ;
    }
}

void wxListBox::MacSetRedraw( bool doDraw )
{
    LSetDrawingMode( doDraw , (ListHandle)m_macList ) ;
}

void wxListBox::MacDoClick()
{
    wxArrayInt aSelections;
    int n ;
    size_t count = GetSelections(aSelections);

    if ( count == m_selectionPreImage.GetCount() )
    {
        bool hasChanged = false ;
        for ( size_t i = 0 ; i < count ; ++i )
        {
            if ( aSelections[i] != m_selectionPreImage[i] )
            {
                hasChanged = true ;
                break ;
            }
        }
        if ( !hasChanged )
        {
            return ;
        }
    }

    m_selectionPreImage = aSelections;

    wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, m_windowId);
    event.SetEventObject( this );

    if ( count > 0 )
    {
        n = aSelections[0];
        if ( HasClientObjectData() )
            event.SetClientObject( GetClientObject(n) );
        else if ( HasClientUntypedData() )
            event.SetClientData( GetClientData(n) );
        event.SetString(GetString(n));
    }
    else
    {
        n = -1;
    }

    event.SetInt(n);

    GetEventHandler()->ProcessEvent(event);
}

void wxListBox::MacDoDoubleClick()
{
    wxCommandEvent event(wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, m_windowId);
    event.SetEventObject( this );
    GetEventHandler()->ProcessEvent(event) ;
}

void wxListBox::OnChar(wxKeyEvent& event)
{
    if ( event.GetKeyCode() == WXK_RETURN || event.GetKeyCode() == WXK_NUMPAD_ENTER)
    {
        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 ;
            }
        }
        event.Skip() ;
    }
    /* generate wxID_CANCEL if command-. or <esc> has been pressed (typically in dialogs) */
    else if (event.GetKeyCode() == WXK_ESCAPE || (event.GetKeyCode() == '.' && event.MetaDown() ) )
    {
        // FIXME: look in ancestors, not just parent.
        wxWindow* win = GetParent()->FindWindow( wxID_CANCEL ) ;
        if (win)
        {
            wxCommandEvent new_event(wxEVT_COMMAND_BUTTON_CLICKED,wxID_CANCEL);
            new_event.SetEventObject( win );
            win->GetEventHandler()->ProcessEvent( new_event );
        }
    }
    else if ( event.GetKeyCode() == WXK_TAB )
    {
        wxNavigationKeyEvent new_event;
        new_event.SetEventObject( this );
        new_event.SetDirection( !event.ShiftDown() );
        /* CTRL-TAB changes the (parent) window, i.e. switch notebook page */
        new_event.SetWindowChange( event.ControlDown() );
        new_event.SetCurrentFocus( this );
        if ( !GetEventHandler()->ProcessEvent( new_event ) )
            event.Skip() ;
    }
    else if ( event.GetKeyCode() == WXK_DOWN || event.GetKeyCode() == WXK_UP )
    {
        // perform the default key handling first
        wxControl::OnKeyDown( event ) ;

        wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, m_windowId);
        event.SetEventObject( this );

        wxArrayInt aSelections;
        int n, count = GetSelections(aSelections);
        if ( count > 0 )
        {
            n = aSelections[0];
            if ( HasClientObjectData() )
                event.SetClientObject( GetClientObject(n) );
            else if ( HasClientUntypedData() )
                event.SetClientData( GetClientData(n) );
            event.SetString(GetString(n));
        }
        else
        {
            n = -1;
        }

        event.SetInt(n);

        GetEventHandler()->ProcessEvent(event);
    }
    else
    {
        if ( event.GetTimestamp() > m_lastTypeIn + 60 )
        {
            m_typeIn = wxEmptyString ;
        }
        m_lastTypeIn = event.GetTimestamp() ;
        m_typeIn += (char) event.GetKeyCode() ;
        int line = FindString(wxT("*")+m_typeIn+wxT("*")) ;
        if ( line >= 0 )
        {
            if ( GetSelection() != line )
            {
                SetSelection(line) ;
                wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, m_windowId);
                event.SetEventObject( this );

                if ( HasClientObjectData() )
                    event.SetClientObject( GetClientObject( line ) );
                else if ( HasClientUntypedData() )
                    event.SetClientData( GetClientData(line) );
                event.SetString(GetString(line));

                event.SetInt(line);

                GetEventHandler()->ProcessEvent(event);
            }
        }
    }
}

#endif // wxUSE_LISTBOX