dc.cpp

Wxpython Implemented on Windows CE, Source code

    wxCoord yy2 = YLOG2DEVMAC(y2);
    wxCoord xxc = XLOG2DEVMAC(xc);
    wxCoord yyc = YLOG2DEVMAC(yc);

    double dx = xx1 - xxc;
    double dy = yy1 - yyc;
    double radius = sqrt((double)(dx * dx + dy * dy));
    wxCoord rad = (wxCoord)radius;
    double radius1, radius2;

    if (xx1 == xx2 && yy1 == yy2)
    {
        radius1 = 0.0;
        radius2 = 360.0;
    }
    else if (radius == 0.0)
    {
        radius1 = radius2 = 0.0;
    }
    else
    {
        radius1 = (xx1 - xxc == 0) ?
            (yy1 - yyc < 0) ? 90.0 : -90.0 :
        -atan2(double(yy1 - yyc), double(xx1 - xxc)) * RAD2DEG;
        radius2 = (xx2 - xxc == 0) ?
            (yy2 - yyc < 0) ? 90.0 : -90.0 :
        -atan2(double(yy2 - yyc), double(xx2 - xxc)) * RAD2DEG;
    }

    wxCoord alpha2 = wxCoord(radius2 - radius1);
    wxCoord alpha1 = wxCoord(wxConvertWXangleToMACangle(radius1));
    while ( alpha2 < 0 )
        alpha2 += 360 ;
    alpha2 = -alpha2 ;
    Rect r = { yyc - rad, xxc - rad, yyc + rad, xxc + rad };

    if (m_brush.GetStyle() != wxTRANSPARENT)
    {
        MacInstallBrush();
        PaintArc(&r, alpha1, alpha2);
    }

    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        MacInstallPen();
        FrameArc(&r, alpha1, alpha2);
    }
}

void wxDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
                              double sa, double ea )
{
    wxCHECK_RET(Ok(), wxT("wxDC::DoDrawEllepticArc - invalid DC"));
    wxMacFastPortSetter helper(this) ;
    Rect r;

    // Order important Mac in opposite direction to wx
    // we have to make sure that the filling is always counter-clockwise
    double angle = sa - ea;
    if ( angle > 0 )
        angle -= 360 ;

    wxCoord xx = XLOG2DEVMAC(x);
    wxCoord yy = YLOG2DEVMAC(y);
    wxCoord ww = m_signX * XLOG2DEVREL(w);
    wxCoord hh = m_signY * YLOG2DEVREL(h);

    // handle -ve width and/or height
    if (ww < 0)
    {
        ww = -ww;
        xx = xx - ww;
    }

    if (hh < 0)
    {
        hh = -hh;
        yy = yy - hh;
    }

    sa = wxConvertWXangleToMACangle(sa);
    r.top    = yy;
    r.left   = xx;
    r.bottom = yy + hh;
    r.right  = xx + ww;

    if (m_brush.GetStyle() != wxTRANSPARENT)
    {
        MacInstallBrush();
        PaintArc(&r, (short)sa, (short)angle);
    }

    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        MacInstallPen();
        FrameArc(&r, (short)sa, (short)angle);
    }
}

void wxDC::DoDrawPoint( wxCoord x, wxCoord y )
{
    wxCHECK_RET(Ok(), wxT("wxDC::DoDrawPoint - invalid DC"));

    wxMacFastPortSetter helper(this) ;

    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        wxCoord xx1 = XLOG2DEVMAC(x);
        wxCoord yy1 = YLOG2DEVMAC(y);
        RGBColor pencolor = MAC_WXCOLORREF( m_pen.GetColour().GetPixel());

        // NOTE: Get/SetCPixel are slow!
        ::SetCPixel( xx1, yy1, &pencolor) ;
        CalcBoundingBox(x, y);
    }
}

void wxDC::DoDrawLines(int n, wxPoint points[],
                        wxCoord xoffset, wxCoord yoffset)
{
    wxCHECK_RET(Ok(), wxT("wxDC::DoDrawLines - invalid DC"));

    if (m_pen.GetStyle() == wxTRANSPARENT)
        return;

    wxMacFastPortSetter helper(this) ;

    MacInstallPen() ;
    wxCoord offset = ( (m_pen.GetWidth() == 0 ? 1 :
    m_pen.GetWidth() ) * (wxCoord)m_scaleX - 1) / 2 ;

    wxCoord x1, x2 , y1 , y2 ;
    x1 = XLOG2DEVMAC(points[0].x + xoffset);
    y1 = YLOG2DEVMAC(points[0].y + yoffset);

    ::MoveTo( x1 - offset, y1 - offset );
    for (int i = 0; i < n-1; i++)
    {
        x2 = XLOG2DEVMAC(points[i + 1].x + xoffset);
        y2 = YLOG2DEVMAC(points[i + 1].y + yoffset);
        ::LineTo( x2 - offset, y2 - offset );
    }
}

void wxDC::DoDrawPolygon(int n, wxPoint points[],
                          wxCoord xoffset, wxCoord yoffset,
                          int fillStyle )
{
    wxCHECK_RET(Ok(), wxT("wxDC::DoDrawPolygon - invalid DC"));

    if ( m_brush.GetStyle() == wxTRANSPARENT && m_pen.GetStyle() == wxTRANSPARENT )
        return ;

    wxMacFastPortSetter helper(this) ;

    wxCoord x1, x2 , y1 , y2 ;
    PolyHandle polygon = OpenPoly();
    x2 = x1 = XLOG2DEVMAC(points[0].x + xoffset);
    y2 = y1 = YLOG2DEVMAC(points[0].y + yoffset);

    ::MoveTo(x1, y1);
    for (int i = 1; i < n; i++)
    {
        x2 = XLOG2DEVMAC(points[i].x + xoffset);
        y2 = YLOG2DEVMAC(points[i].y + yoffset);
        ::LineTo(x2, y2);
    }

    // close the polyline if necessary
    if ( x1 != x2 || y1 != y2 )
        ::LineTo( x1, y1 ) ;
    ClosePoly();

    if (m_brush.GetStyle() != wxTRANSPARENT)
    {
        MacInstallBrush();
        ::PaintPoly( polygon );
    }

    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        MacInstallPen() ;
        ::FramePoly( polygon ) ;
    }

    KillPoly( polygon );
}

void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{
    wxCHECK_RET(Ok(), wxT("wxDC::DoDrawRectangle - invalid DC"));

    wxMacFastPortSetter helper(this) ;

    wxCoord xx = XLOG2DEVMAC(x);
    wxCoord yy = YLOG2DEVMAC(y);
    wxCoord ww = m_signX * XLOG2DEVREL(width);
    wxCoord hh = m_signY * YLOG2DEVREL(height);

    // CMB: draw nothing if transformed w or h is 0
    if (ww == 0 || hh == 0)
        return;

    // CMB: handle -ve width and/or height
    if (ww < 0)
    {
        ww = -ww;
        xx = xx - ww;
    }

    if (hh < 0)
    {
        hh = -hh;
        yy = yy - hh;
    }

    Rect rect = { yy , xx , yy + hh , xx + ww } ;

    if (m_brush.GetStyle() != wxTRANSPARENT)
    {
        MacInstallBrush() ;
        ::PaintRect( &rect ) ;
    }

    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        MacInstallPen() ;
        ::FrameRect( &rect ) ;
    }
}

void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y,
                                   wxCoord width, wxCoord height,
                                   double radius)
{
    wxCHECK_RET(Ok(), wxT("wxDC::DoDrawRoundedRectangle - invalid DC"));

    wxMacFastPortSetter helper(this) ;
    if (radius < 0.0)
        radius = - radius * ((width < height) ? width : height);
    wxCoord xx = XLOG2DEVMAC(x);
    wxCoord yy = YLOG2DEVMAC(y);
    wxCoord ww = m_signX * XLOG2DEVREL(width);
    wxCoord hh = m_signY * YLOG2DEVREL(height);

    // CMB: draw nothing if transformed w or h is 0
    if (ww == 0 || hh == 0)
        return;

    // CMB: handle -ve width and/or height
    if (ww < 0)
    {
        ww = -ww;
        xx = xx - ww;
    }

    if (hh < 0)
    {
        hh = -hh;
        yy = yy - hh;
    }

    Rect rect = { yy , xx , yy + hh , xx + ww } ;

    if (m_brush.GetStyle() != wxTRANSPARENT)
    {
        MacInstallBrush() ;
        ::PaintRoundRect( &rect , int(radius * 2) , int(radius * 2) ) ;
    }

    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        MacInstallPen() ;
        ::FrameRoundRect( &rect , int(radius * 2) , int(radius * 2) ) ;
    }
}

void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{
    wxCHECK_RET(Ok(), wxT("wxDC::DoDrawEllipse - invalid DC"));

    wxMacFastPortSetter helper(this) ;

    wxCoord xx = XLOG2DEVMAC(x);
    wxCoord yy = YLOG2DEVMAC(y);
    wxCoord ww = m_signX * XLOG2DEVREL(width);
    wxCoord hh = m_signY * YLOG2DEVREL(height);

    // CMB: draw nothing if transformed w or h is 0
    if (ww == 0 || hh == 0)
        return;

    // CMB: handle -ve width and/or height
    if (ww < 0)
    {
        ww = -ww;
        xx = xx - ww;
    }

    if (hh < 0)
    {
        hh = -hh;
        yy = yy - hh;
    }

    Rect rect = { yy , xx , yy + hh , xx + ww } ;

    if (m_brush.GetStyle() != wxTRANSPARENT)
    {
        MacInstallBrush() ;
        ::PaintOval( &rect ) ;
    }

    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        MacInstallPen() ;
        ::FrameOval( &rect ) ;
    }
}

bool wxDC::CanDrawBitmap(void) const
{
    return true ;
}

bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
                   wxDC *source, wxCoord xsrc, wxCoord ysrc, int logical_func , bool useMask,
                   wxCoord xsrcMask, wxCoord ysrcMask )
{
    wxCHECK_MSG(Ok(), false, wxT("wxDC::DoBlit - invalid DC"));
    wxCHECK_MSG(source->Ok(), false, wxT("wxDC::DoBlit - invalid source DC"));

    if ( logical_func == wxNO_OP )
        return true ;

    if (xsrcMask == -1 && ysrcMask == -1)
    {
        xsrcMask = xsrc;
        ysrcMask = ysrc;
    }

    // correct the parameter in case this dc does not have a mask at all
    if ( useMask && !source->m_macMask )
        useMask = false ;

    Rect srcrect , dstrect ;
    srcrect.top = source->YLOG2DEVMAC(ysrc) ;
    srcrect.left = source->XLOG2DEVMAC(xsrc)  ;
    srcrect.right = source->XLOG2DEVMAC(xsrc + width ) ;
    srcrect.bottom = source->YLOG2DEVMAC(ysrc + height) ;
    dstrect.top = YLOG2DEVMAC(ydest) ;
    dstrect.left = XLOG2DEVMAC(xdest) ;
    dstrect.bottom = YLOG2DEVMAC(ydest + height )  ;
    dstrect.right = XLOG2DEVMAC(xdest + width ) ;
    short mode = kUnsupportedMode ;
    bool invertDestinationFirst = false ;

    switch ( logical_func )
    {
    case wxAND:        // src AND dst
        mode = adMin ; // ok
        break ;

    case wxAND_INVERT: // (NOT src) AND dst
        mode = notSrcOr  ; // ok
        break ;

    case wxAND_REVERSE:// src AND (NOT dst)
        invertDestinationFirst = true ;
        mode = srcOr ;
        break ;

    case wxCLEAR:      // 0
        mode = kEmulatedMode ;
        break ;

    case wxCOPY:       // src
        mode = srcCopy ; // ok
        break ;

    case wxEQUIV:      // (NOT src) XOR dst
        mode = srcXor ; // ok
        break ;

    case wxINVERT:     // NOT dst
        mode = kEmulatedMode ; //or hilite ;
        break ;

    case wxNAND:       // (NOT src) OR (NOT dst)
        invertDestinationFirst = true ;
        mode = srcBic ;
        break ;

    case wxNOR:        // (NOT src) AND (NOT dst)
        invertDestinationFirst = true ;
        mode = notSrcOr ;
        break ;

    case wxNO_OP:      // dst
        mode = kEmulatedMode ; // this has already been handled upon entry
        break ;

    case wxOR:         // src OR dst
        mode = notSrcBic ;
        break ;

    case wxOR_INVERT:  // (NOT src) OR dst
        mode = srcBic ;
        break ;

    case wxOR_REVERSE: // src OR (NOT dst)
        invertDestinationFirst = true ;
        mode = notSrcBic ;
        break ;

    case wxSET:        // 1
        mode = kEmulatedMode ;
        break ;

    case wxSRC_INVERT: // (NOT src)
        mode = notSrcCopy ; // ok
        break ;

    case wxXOR:        // src XOR dst
        mode = notSrcXor ; // ok
        break ;

    default :
        break ;
    }