cursor.cpp

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

    wxASSERT_MSG( hotSpotX >= 0 && hotSpotX < image_w &&
                  hotSpotY >= 0 && hotSpotY < image_h,
                  wxT("invalid cursor hot spot coordinates") );

    wxImage image16(image); // final image of correct size

    // if image is too small then place it in the center, resize it if too big
    if ((w > image_w) && (h > image_h))
    {
        wxPoint offset((w - image_w) / 2, (h - image_h) / 2);
        hotSpotX = hotSpotX + offset.x;
        hotSpotY = hotSpotY + offset.y;

        image16 = image.Size(wxSize(w, h), offset);
    }
    else if ((w != image_w) || (h != image_h))
    {
        hotSpotX = int(hotSpotX * double(w) / double(image_w));
        hotSpotY = int(hotSpotY * double(h) / double(image_h));

        image16 = image.Scale(w, h);
    }

    unsigned char * rgbBits = image16.GetData();
    bool bHasMask = image16.HasMask() ;

    PixMapHandle pm = (PixMapHandle) NewHandleClear( sizeof(PixMap) )  ;
    short extent = 16 ;
    short bytesPerPixel = 1 ;
    short depth = 8 ;
    Rect bounds = { 0 , 0 , extent , extent } ;
    CCrsrHandle ch = (CCrsrHandle) NewHandleClear( sizeof(CCrsr) ) ;
    CTabHandle newColors = GetCTable( 8 ) ;
    HandToHand( (Handle *) &newColors );

    // set the values to the indices
    for ( int i = 0 ; i < (**newColors).ctSize ; ++i )
    {
        (**newColors).ctTable[i].value = i ;
    }

    HLock( (Handle)ch );
    (**ch).crsrType = 0x8001; // color cursors
    (**ch).crsrMap = pm;
    short bytesPerRow = bytesPerPixel * extent;

    (**pm).baseAddr = 0;
    (**pm).rowBytes = bytesPerRow | 0x8000;
    (**pm).bounds = bounds;
    (**pm).pmVersion = 0;
    (**pm).packType = 0;
    (**pm).packSize = 0;
    (**pm).hRes = 0x00480000; // 72 DPI default res
    (**pm).vRes = 0x00480000; // 72 DPI default res
    (**pm).pixelSize = depth;
    (**pm).pixelType = 0;
    (**pm).cmpCount = 1;
    (**pm).cmpSize = depth;
    (**pm).pmTable = newColors;

    (**ch).crsrData = NewHandleClear( extent * bytesPerRow ) ;
    (**ch).crsrXData = NULL ;
    (**ch).crsrXValid = 0;
    (**ch).crsrXHandle = NULL;

    (**ch).crsrHotSpot.h = hotSpotX ;
    (**ch).crsrHotSpot.v = hotSpotY ;
    (**ch).crsrXTable = 0 ;
    (**ch).crsrID = GetCTSeed() ;

    memset( (**ch).crsr1Data  , 0 , sizeof( Bits16 ) ) ;
    memset( (**ch).crsrMask , 0 , sizeof( Bits16 ) ) ;

    unsigned char mr = image16.GetMaskRed() ;
    unsigned char mg = image16.GetMaskGreen() ;
    unsigned char mb = image16.GetMaskBlue() ;

    for ( int y = 0 ; y < h ; ++y )
    {
        short rowbits = 0, maskbits = 0 ;

        for ( int x = 0 ; x < w ; ++x )
        {
            long pos = (y * w + x) * 3;

            unsigned char r = rgbBits[pos] ;
            unsigned char g = rgbBits[pos + 1] ;
            unsigned char b = rgbBits[pos + 2] ;
            RGBColor col = { 0xFFFF, 0xFFFF, 0xFFFF } ;

            if ( bHasMask && r == mr && g == mg && b == mb )
            {
                // masked area, does not appear anywhere
            }
            else
            {
                if ( (int)r + (int)g + (int)b < 0x0200 )
                    rowbits |= ( 1 << (15 - x) ) ;

                maskbits |= ( 1 << (15 - x) ) ;

                col = *((RGBColor*) wxColor( r , g , b ).GetPixel()) ;
            }

            *((*(**ch).crsrData) + y * bytesPerRow + x) =
                GetCTabIndex( newColors , &col) ;
        }
#ifdef WORDS_BIGENDIAN
        (**ch).crsr1Data[y] = rowbits ;
        (**ch).crsrMask[y] = maskbits ;
#else
        (**ch).crsr1Data[y] = CFSwapInt16(rowbits) ;
        (**ch).crsrMask[y] = CFSwapInt16(maskbits) ;
#endif
    }

    if ( !bHasMask )
        memcpy( (**ch).crsrMask , (**ch).crsr1Data , sizeof( Bits16) ) ;

    HUnlock( (Handle)ch ) ;
    M_CURSORDATA->m_hCursor = ch ;
    M_CURSORDATA->m_isColorCursor = true ;
#endif

}

#endif //wxUSE_IMAGE

wxCursor::wxCursor(const wxString& cursor_file, long flags, int hotSpotX, int hotSpotY)
{
    m_refData = new wxCursorRefData;
    if ( flags == wxBITMAP_TYPE_MACCURSOR_RESOURCE )
    {
#ifndef __LP64__
        Str255 theName ;
        wxMacStringToPascal( cursor_file , theName ) ;

        Handle resHandle = ::GetNamedResource( 'crsr' , theName ) ;
        if ( resHandle )
        {
            short theId = -1 ;
            OSType theType ;

            GetResInfo( resHandle , &theId , &theType , theName ) ;
            ReleaseResource( resHandle ) ;

            M_CURSORDATA->m_hCursor = GetCCursor( theId ) ;
            if ( M_CURSORDATA->m_hCursor )
                M_CURSORDATA->m_isColorCursor = true ;
        }
        else
        {
            Handle resHandle = ::GetNamedResource( 'CURS' , theName ) ;
            if ( resHandle )
            {
                short theId = -1 ;
                OSType theType ;

                GetResInfo( resHandle , &theId , &theType , theName ) ;
                ReleaseResource( resHandle ) ;

                M_CURSORDATA->m_hCursor = GetCursor( theId ) ;
                if ( M_CURSORDATA->m_hCursor )
                    M_CURSORDATA->m_releaseHandle = true ;
            }
        }
#endif
    }
    else
    {
#if wxUSE_IMAGE
        wxImage image ;
        image.LoadFile( cursor_file, flags ) ;
        if ( image.Ok() )
        {
            image.SetOption( wxIMAGE_OPTION_CUR_HOTSPOT_X, hotSpotX ) ;
            image.SetOption( wxIMAGE_OPTION_CUR_HOTSPOT_Y, hotSpotY ) ;
            delete m_refData ;
            CreateFromImage( image ) ;
        }
#endif
    }
}

// Cursors by stock number
wxCursor::wxCursor(int cursor_type)
{
    m_refData = new wxCursorRefData;

    switch (cursor_type)
    {
    case wxCURSOR_COPY_ARROW:
        M_CURSORDATA->m_themeCursor = kThemeCopyArrowCursor;
        break;

    case wxCURSOR_WAIT:
        M_CURSORDATA->m_themeCursor = kThemeWatchCursor;
        break;

    case wxCURSOR_IBEAM:
        M_CURSORDATA->m_themeCursor = kThemeIBeamCursor;
        break;

    case wxCURSOR_CROSS:
        M_CURSORDATA->m_themeCursor = kThemeCrossCursor;
        break;

    case wxCURSOR_SIZENWSE:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorSizeNWSE);
        break;

    case wxCURSOR_SIZENESW:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorSizeNESW);
        break;

    case wxCURSOR_SIZEWE:
        M_CURSORDATA->m_themeCursor = kThemeResizeLeftRightCursor;
        break;

    case wxCURSOR_SIZENS:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorSizeNS);
        break;

    case wxCURSOR_SIZING:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorSize);
        break;

    case wxCURSOR_HAND:
        M_CURSORDATA->m_themeCursor = kThemePointingHandCursor;
        break;

    case wxCURSOR_BULLSEYE:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorBullseye);
        break;

    case wxCURSOR_PENCIL:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorPencil);
        break;

    case wxCURSOR_MAGNIFIER:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorMagnifier);
        break;

    case wxCURSOR_NO_ENTRY:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorNoEntry);
        break;

    case wxCURSOR_WATCH:
        M_CURSORDATA->m_themeCursor = kThemeWatchCursor;
        break;

    case wxCURSOR_PAINT_BRUSH:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorPaintBrush);
        break;

    case wxCURSOR_POINT_LEFT:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorPointLeft);
        break;

    case wxCURSOR_POINT_RIGHT:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorPointRight);
        break;

    case wxCURSOR_QUESTION_ARROW:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorQuestionArrow);
        break;

    case wxCURSOR_BLANK:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorBlank);
        break;

    case wxCURSOR_RIGHT_ARROW:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorRightArrow);
        break;

    case wxCURSOR_SPRAYCAN:
        M_CURSORDATA->m_hCursor = wxGetStockCursor(kwxCursorRoller);
        break;

    case wxCURSOR_CHAR:
    case wxCURSOR_ARROW:
    case wxCURSOR_LEFT_BUTTON:
    case wxCURSOR_RIGHT_BUTTON:
    case wxCURSOR_MIDDLE_BUTTON:
    default:
        M_CURSORDATA->m_themeCursor = kThemeArrowCursor;
        break;
    }

    if ( M_CURSORDATA->m_themeCursor == -1 )
        M_CURSORDATA->m_releaseHandle = true;
}

void wxCursor::MacInstall() const
{
    gMacCurrentCursor = *this ;
    if ( m_refData && M_CURSORDATA->m_themeCursor != -1 )
    {
        SetThemeCursor( M_CURSORDATA->m_themeCursor ) ;
    }
    else if ( m_refData && M_CURSORDATA->m_hCursor )
    {
#ifndef __LP64__
       if ( M_CURSORDATA->m_isColorCursor )
            ::SetCCursor( (CCrsrHandle) M_CURSORDATA->m_hCursor ) ;
        else
            ::SetCursor( * (CursHandle) M_CURSORDATA->m_hCursor ) ;
#endif
    }
    else
    {
        SetThemeCursor( kThemeArrowCursor ) ;
    }
}

wxCursor::~wxCursor()
{
}

// Global cursor setting
void wxSetCursor(const wxCursor& cursor)
{
    cursor.MacInstall() ;
}