dccg.cpp

Wxpython Implemented on Windows CE, Source code

    CalcBoundingBox(x2, y2);
}

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

    if ( m_logicalFunction != wxCOPY )
        return ;

    int w = 0, h = 0;

    GetSize( &w, &h );
    wxCoord xx = XLOG2DEVMAC(x);
    wxCoord yy = YLOG2DEVMAC(y);

    wxGraphicPath* path = m_graphicContext->CreatePath() ;
    path->MoveToPoint( XLOG2DEVMAC(0), yy ) ;
    path->AddLineToPoint( XLOG2DEVMAC(w), yy ) ;
    path->CloseSubpath() ;
    path->MoveToPoint( xx, YLOG2DEVMAC(0) ) ;
    path->AddLineToPoint( xx, YLOG2DEVMAC(h) ) ;
    path->CloseSubpath() ;
    m_graphicContext->StrokePath( path ) ;
    delete path ;

    CalcBoundingBox(x, y);
    CalcBoundingBox(x + w, y + h);
}

void wxDC::DoDrawArc( wxCoord x1, wxCoord y1,
                      wxCoord x2, wxCoord y2,
                      wxCoord xc, wxCoord yc )
{
    wxCHECK_RET( Ok(), wxT("wxDC(cg)::DoDrawArc - invalid DC") );

    if ( m_logicalFunction != wxCOPY )
        return ;

    wxCoord xx1 = XLOG2DEVMAC(x1);
    wxCoord yy1 = YLOG2DEVMAC(y1);
    wxCoord xx2 = XLOG2DEVMAC(x2);
    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 sa, ea;
    if (xx1 == xx2 && yy1 == yy2)
    {
        sa = 0.0;
        ea = 360.0;
    }
    else if (radius == 0.0)
    {
        sa = ea = 0.0;
    }
    else
    {
        sa = (xx1 - xxc == 0) ?
            (yy1 - yyc < 0) ? 90.0 : -90.0 :
        -atan2(double(yy1 - yyc), double(xx1 - xxc)) * RAD2DEG;
        ea = (xx2 - xxc == 0) ?
            (yy2 - yyc < 0) ? 90.0 : -90.0 :
        -atan2(double(yy2 - yyc), double(xx2 - xxc)) * RAD2DEG;
    }

    bool fill = m_brush.GetStyle() != wxTRANSPARENT ;
    wxMacCGContext* mctx = ((wxMacCGContext*) m_graphicContext) ;
    CGContextRef ctx = mctx->GetNativeContext() ;
    CGContextSaveGState( ctx ) ;
    CGContextTranslateCTM( ctx, xxc , yyc );
    CGContextScaleCTM( ctx , 1 , -1 ) ;
    if ( fill )
        CGContextMoveToPoint( ctx , 0 , 0 ) ;
    CGContextAddArc( ctx, 0, 0 , rad , DegToRad(sa), DegToRad(ea), 0 );
    if ( fill )
        CGContextAddLineToPoint( ctx , 0 , 0 ) ;
    CGContextRestoreGState( ctx ) ;
    CGContextDrawPath( ctx , mctx->GetDrawingMode() ) ;
}

void wxDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
                              double sa, double ea )
{
    wxCHECK_RET( Ok(), wxT("wxDC(cg)::DoDrawEllipticArc - invalid DC") );

    if ( m_logicalFunction != wxCOPY )
        return ;

    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;
    }

    bool fill = m_brush.GetStyle() != wxTRANSPARENT ;

    wxMacCGContext* mctx = ((wxMacCGContext*) m_graphicContext) ;
    CGContextRef ctx = mctx->GetNativeContext() ;

    CGContextSaveGState( ctx ) ;
    CGContextTranslateCTM( ctx, xx + ww / 2, yy + hh / 2 );
    CGContextScaleCTM( ctx , 1 * ww / 2 , -1 * hh / 2 ) ;
    if ( fill )
        CGContextMoveToPoint( ctx , 0 , 0 ) ;
    CGContextAddArc( ctx, 0, 0, 1, DegToRad( sa ), DegToRad( ea ), 0 );
    if ( fill )
        CGContextAddLineToPoint( ctx , 0 , 0 ) ;
    CGContextRestoreGState( ctx ) ;
    CGContextDrawPath( ctx , mctx->GetDrawingMode() ) ;
}

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

    DoDrawLine( x , y , x + 1 , y + 1 ) ;
}

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

#if !wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
    if ( m_logicalFunction != wxCOPY )
        return ;
#endif

    wxCoord x1, x2 , y1 , y2 ;
    x1 = XLOG2DEVMAC(points[0].x + xoffset);
    y1 = YLOG2DEVMAC(points[0].y + yoffset);
    wxGraphicPath* path = m_graphicContext->CreatePath() ;
    path->MoveToPoint( x1 , y1 ) ;
    for (int i = 1; i < n; i++)
    {
        x2 = XLOG2DEVMAC(points[i].x + xoffset);
        y2 = YLOG2DEVMAC(points[i].y + yoffset);

        path->AddLineToPoint( x2 , y2 ) ;
    }

    m_graphicContext->StrokePath( path ) ;
    delete path ;
}

#if wxUSE_SPLINES
void wxDC::DoDrawSpline(wxList *points)
{
    wxCHECK_RET( Ok(), wxT("wxDC(cg)::DoDrawSpline - invalid DC") );

    if ( m_logicalFunction != wxCOPY )
        return ;

    wxGraphicPath* path = m_graphicContext->CreatePath() ;

    wxList::compatibility_iterator node = points->GetFirst();
    if (node == wxList::compatibility_iterator())
        // empty list
        return;

    wxPoint *p = (wxPoint *)node->GetData();

    wxCoord x1 = p->x;
    wxCoord y1 = p->y;

    node = node->GetNext();
    p = (wxPoint *)node->GetData();

    wxCoord x2 = p->x;
    wxCoord y2 = p->y;
    wxCoord cx1 = ( x1 + x2 ) / 2;
    wxCoord cy1 = ( y1 + y2 ) / 2;

    path->MoveToPoint( XLOG2DEVMAC( x1 ) , XLOG2DEVMAC( y1 ) ) ;
    path->AddLineToPoint( XLOG2DEVMAC( cx1 ) , XLOG2DEVMAC( cy1 ) ) ;

#if !wxUSE_STL
    while ((node = node->GetNext()) != NULL)
#else
    while ((node = node->GetNext()))
#endif // !wxUSE_STL
    {
        p = (wxPoint *)node->GetData();
        x1 = x2;
        y1 = y2;
        x2 = p->x;
        y2 = p->y;
        wxCoord cx4 = (x1 + x2) / 2;
        wxCoord cy4 = (y1 + y2) / 2;

        path->AddQuadCurveToPoint(
            XLOG2DEVMAC( x1 ) , XLOG2DEVMAC( y1 ) ,
            XLOG2DEVMAC( cx4 ) , XLOG2DEVMAC( cy4 ) ) ;

        cx1 = cx4;
        cy1 = cy4;
    }

    path->AddLineToPoint( XLOG2DEVMAC( x2 ) , XLOG2DEVMAC( y2 ) ) ;

    m_graphicContext->StrokePath( path ) ;
    delete path ;
}
#endif

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

    if ( n <= 0 || (m_brush.GetStyle() == wxTRANSPARENT && m_pen.GetStyle() == wxTRANSPARENT ) )
        return ;
    if ( m_logicalFunction != wxCOPY )
        return ;

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

    wxGraphicPath* path = m_graphicContext->CreatePath() ;
    path->MoveToPoint( x1 , y1 ) ;
    for (int i = 1; i < n; i++)
    {
        x2 = XLOG2DEVMAC(points[i].x + xoffset);
        y2 = YLOG2DEVMAC(points[i].y + yoffset);

        path->AddLineToPoint( x2 , y2 ) ;
    }

    if ( x1 != x2 || y1 != y2 )
        path->AddLineToPoint( x1, y1 ) ;

    path->CloseSubpath() ;
    m_graphicContext->DrawPath( path , fillStyle ) ;

    delete path ;
}

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

    if ( m_logicalFunction != wxCOPY )
        return ;

    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;
    }

    wxGraphicPath* path = m_graphicContext->CreatePath() ;
    path->AddRectangle( xx , yy , ww , hh ) ;
    m_graphicContext->DrawPath( path ) ;
    delete path ;
}

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

    if ( m_logicalFunction != wxCOPY )
        return ;

    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;
    }

    wxMacCGContext* mctx = ((wxMacCGContext*) m_graphicContext) ;
    CGContextRef ctx = mctx->GetNativeContext() ;
    AddRoundedRectToPath( ctx , CGRectMake( xx , yy , ww , hh ) , radius , radius ) ;
    CGContextDrawPath( ctx , mctx->GetDrawingMode() ) ;
}

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

    if ( m_logicalFunction != wxCOPY )
        return ;

    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;
    }

    wxMacCGContext* mctx = ((wxMacCGContext*) m_graphicContext) ;
    CGContextRef ctx = mctx->GetNativeContext() ;
    CGContextSaveGState( ctx ) ;
    CGContextTranslateCTM( ctx, xx + ww / 2, yy + hh / 2 );
    CGContextScaleCTM( ctx , ww / 2 , hh / 2 ) ;
    CGContextAddArc( ctx, 0, 0, 1, 0 , 2 * M_PI , 0 );
    CGContextRestoreGState( ctx ) ;
    CGContextDrawPath( ctx , mctx->GetDrawingMode() ) ;
}

bool wxDC::CanDrawBitmap() 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(cg)::DoBlit - invalid DC") );
    wxCHECK_MSG( source->Ok(), false, wxT("wxDC(cg)::DoBlit - invalid source DC") );

    if ( logical_func == wxNO_OP )
        return true ;

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

    wxCoord yysrc = source->YLOG2DEVMAC(ysrc) ;
    wxCoord xxsrc = source->XLOG2DEVMAC(xsrc) ;
    wxCoord wwsrc = source->XLOG2DEVREL(width) ;
    wxCoord hhsrc = source->YLOG2DEVREL(height) ;

    wxCoord yydest = YLOG2DEVMAC(ydest) ;
    wxCoord xxdest = XLOG2DEVMAC(xdest) ;
    wxCoord wwdest = XLOG2DEVREL(width) ;
    wxCoord hhdest = YLOG2DEVREL(height) ;

    wxMemoryDC* memdc = dynamic_cast<wxMemoryDC*>(source) ;
    if ( memdc && logical_func == wxCOPY )
    {
        wxBitmap blit = memdc->GetSelectedObject() ;

        wxASSERT_MSG( blit.Ok() , wxT("Invalid bitmap for blitting") ) ;

        wxCoord bmpwidth = blit.GetWidth();
        wxCoord bmpheight = blit.GetHeight();

        if ( xxsrc != 0 || yysrc != 0 || bmpwidth != wwsrc || bmpheight != hhsrc )
        {
            wwsrc = wxMin( wwsrc , bmpwidth - xxsrc ) ;
            hhsrc = wxMin( hhsrc , bmpheight - yysrc ) ;
            if ( wwsrc > 0 && hhsrc > 0 )
            {
                if ( xxsrc >= 0 && yysrc >= 0 )
                {
                    wxRect subrect( xxsrc, yysrc, wwsrc , hhsrc ) ;
                    blit = blit.GetSubBitmap( subrect ) ;
                }
                else
                {
                    // in this case we'd probably have to adjust the different coordinates, but
                    // we have to find out proper contract first