dccg.cpp

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

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 ) , YLOG2DEVMAC( y1 ) ) ;
    path->AddLineToPoint( XLOG2DEVMAC( cx1 ) , YLOG2DEVMAC( 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 ) , YLOG2DEVMAC( y1 ) ,
            XLOG2DEVMAC( cx4 ) , YLOG2DEVMAC( cy4 ) ) ;

        cx1 = cx4;
        cy1 = cy4;
    }

    path->AddLineToPoint( XLOG2DEVMAC( x2 ) , YLOG2DEVMAC( 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;
    }

    int penwidth = m_pen.GetWidth();
    if ( penwidth == 0 )
        penwidth = 1 ;
    if ( m_pen.GetStyle() == wxTRANSPARENT )
        penwidth = 0 ;

    bool offset = ( penwidth % 2 ) == 1 ;

    wxGraphicPath* path = m_graphicContext->CreatePath() ;
    // if we are offsetting the entire rectangle is moved 0.5, so the border line gets off by 1
    if ( offset )
        path->AddRectangle( xx , yy , ww-1 , hh-1 ) ;
    else
        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;
    }

    wxGraphicPath* path = m_graphicContext->CreatePath() ;
    if ( radius == 0)
    {
        path->AddRectangle( xx , yy , ww , hh ) ;
        m_graphicContext->DrawPath( path ) ;
    }
    else
    {
        path->MoveToPoint( xx + ww, yy + hh / 2);
        path->AddArcToPoint(xx + ww, yy + hh, xx + ww / 2,yy +  hh, radius);
        path->AddArcToPoint(xx , yy + hh, xx , yy + hh / 2, radius);
        path->AddArcToPoint(xx , yy , xx + ww / 2, yy , radius);
        path->AddArcToPoint(xx + ww, yy , xx + ww, yy + hh / 2, radius);
        path->CloseSubpath();
        m_graphicContext->DrawPath( path ) ;
    }
    delete path ;
}

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;
    }

    wxGraphicPath* path = m_graphicContext->CreatePath() ;
    m_graphicContext->PushState() ;
    m_graphicContext->Translate(xx + ww / 2, yy + hh / 2);
    m_graphicContext->Scale(ww / 2 , hh / 2);
    path->AddArc( 0, 0, 1, 0 , 2 * M_PI , false ) ;
    m_graphicContext->DrawPath( path ) ;
    m_graphicContext->PopState() ;
    delete path ;
}

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 ) ;
                    // TODO we perhaps could add a DrawSubBitmap call to dc for performance reasons
                    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
                    blit = wxNullBitmap ;
                }
            }
            else
            {
                blit = wxNullBitmap ;
            }
        }

        if ( blit.Ok() )
        {
            m_graphicContext->DrawBitmap( blit, xxdest , yydest , wwdest , hhdest ) ;
        }
    }
    else
    {
        wxFAIL_MSG( wxT("Blitting is only supported from bitmap contexts, and only with wxCOPY logical operation.") ) ;
        return false ;
    }

    return true;
}

void wxDC::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
                              double angle)
{
    wxCHECK_RET( Ok(), wxT("wxDC(cg)::DoDrawRotatedText - invalid DC") );
//    wxCHECK_RET( m_macATSUIStyle != NULL, wxT("wxDC(cg)::DoDrawRotatedText - no valid font set") );

    if ( str.length() == 0 )
        return ;
    if ( m_logicalFunction != wxCOPY )
        return ;

    int drawX = XLOG2DEVMAC(x) ;
    int drawY = YLOG2DEVMAC(y) ;

    m_graphicContext->DrawText( str, drawX ,drawY , angle ) ;
}

void wxDC::DoDrawText(const wxString& strtext, wxCoord x, wxCoord y)
{
    wxCHECK_RET( Ok(), wxT("wxDC(cg)::DoDrawText - invalid DC") );

    DoDrawRotatedText( strtext , x , y , 0.0 ) ;
}

bool wxDC::CanGetTextExtent() const
{
    wxCHECK_MSG( Ok(), false, wxT("wxDC(cg)::CanGetTextExtent - invalid DC") );

    return true ;
}

void wxDC::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
                            wxCoord *descent, wxCoord *externalLeading ,
                            wxFont *theFont ) const
{
    wxCHECK_RET( Ok(), wxT("wxDC(cg)::DoGetTextExtent - invalid DC") );

    if ( theFont )
    {
        m_graphicContext->SetFont( *theFont ) ;
    }

    wxCoord h , d , e , w ;

    m_graphicContext->GetTextExtent( str, &w, &h, &d, &e ) ;

    if ( height )
        *height = YDEV2LOGREL( h ) ;
    if ( descent )
        *descent =YDEV2LOGREL( d);
    if ( externalLeading )
        *externalLeading = YDEV2LOGREL( e);
    if ( width )
        *width = XDEV2LOGREL( w ) ;

    if ( theFont )
    {
        m_graphicContext->SetFont( m_font ) ;
    }
}

bool wxDC::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
{
    wxCHECK_MSG( Ok(), false, wxT("wxDC(cg)::DoGetPartialTextExtents - invalid DC") );

    m_graphicContext->GetPartialTextExtents( text, widths ) ;
    for ( size_t i = 0 ; i < widths.GetCount() ; ++i )
        widths[i] = XDEV2LOGREL( widths[i] );

    return true;
}

wxCoord wxDC::GetCharWidth(void) const
{
    wxCoord width ;
    DoGetTextExtent( wxT("g") , &width , NULL , NULL , NULL , NULL ) ;

    return width ;
}

wxCoord wxDC::GetCharHeight(void) const
{
    wxCoord height ;
    DoGetTextExtent( wxT("g") , NULL , &height , NULL , NULL , NULL ) ;

    return height ;
}

void wxDC::Clear(void)
{
    wxCHECK_RET( Ok(), wxT("wxDC(cg)::Clear - invalid DC") );

    if (m_backgroundBrush.Ok() && m_backgroundBrush.GetStyle() != wxTRANSPARENT)
    {
        HIRect rect = CGRectMake( -10000 , -10000 , 20000 , 20000 ) ;
        CGContextRef cg = ((wxMacCGContext*)(m_graphicContext))->GetNativeContext() ;
        switch ( m_backgroundBrush.MacGetBrushKind() )
        {
            case kwxMacBrushTheme :
                {
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4
                    if ( HIThemeSetFill != 0 )
                    {
                        HIThemeSetFill( m_backgroundBrush.MacGetTheme(), NULL, cg, kHIThemeOrientationNormal );
                        CGContextFillRect(cg, rect);

                    }
                    else
#endif
                    {
                        RGBColor color;
                        GetThemeBrushAsColor( m_backgroundBrush.MacGetTheme(), 32, true, &color );
                        CGContextSetRGBFillColor( cg, (CGFloat) color.red / 65536,
                            (CGFloat) color.green / 65536, (CGFloat) color.blue / 65536, 1 );
                            CGContextFillRect( cg, rect );
                    }

                    // reset to normal value
                    RGBColor col = MAC_WXCOLORREF( GetBrush().GetColour().GetPixel() ) ;
                    CGContextSetRGBFillColor( cg, col.red / 65536.0, col.green / 65536.0, col.blue / 65536.0, 1.0 );
                }
                break ;

            case kwxMacBrushThemeBackground :
                {
                    wxFAIL_MSG( wxT("There shouldn't be theme backgrounds under Quartz") ) ;

#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_3
                    if ( UMAGetSystemVersion() >= 0x1030 )
                    {
                        HIThemeBackgroundDrawInfo drawInfo ;
                        drawInfo.version = 0 ;
                        drawInfo.state = kThemeStateActive ;
                        drawInfo.kind = m_backgroundBrush.MacGetThemeBackground( NULL ) ;