QGraphicsTextItem AlphaColor Background to CSS2

[patrik08]

How i find the best way to convert AlphaColor Background qcolor to html value
HTML only having from 0.00 transparent to 1.00
and AlphaColor 1-255

and on html visible is from 0.7 to 1.0 !!
Have you a valid hack?

/* QGraphicsTextItem document()  to div layer QFileInfo f destination file html 
to save external image if exist..
*/
QString FloatDiagram::toDivHtml( QFileInfo f )
{
    ///// #define POINT_TO_MM(mm) ((mm)/2.83465058)  point px mm ?? ////
    #define ALPHAHTML(alpha) ((alpha)/254.99999999)
    QString masterpath = f.absolutePath()+"/"+FOPIMAGEDIR;
    /* Paint QGraphicsTextItem style to html css inline */
    QString styles = "position:absolute; top:"+QString("%1px")
    .arg(pos().y())+"; left:"+QString("%1px")
    .arg(pos().x())+"; width:"+QString("%1px")
    .arg(wi)+"; height:"+QString("%1px")
    .arg(hi)+"; ";
 
    if (AlphaColor < 44) {
    styles.append(QString("background-color:transparent; ") );
    } else {
    styles.append(QString("background-color:%1; ").arg( BGColor.name() ) );  
    }
    /* AlphaColor = backgroundqcolor.alpha(); */
    int alFaCol = qBound(0,AlphaColor,256);
    qreal percentos = ALPHAHTML( alFaCol );
    if (percentos < 1 && AlphaColor > 44) {
    QString Tnetto = QString("%1").arg(percentos, 0, 'f', 4);
    styles.append(QString("opacity:%1; filter: alpha(opacity=%1); -moz-opacity:%1; ").arg( Tnetto) );
    }
    /* insert border having? */
    if (BorderDicks > 0 ) {
    styles.append(QString("border:%2px solid %1; ").arg(MarginColor.name()).arg(BorderDicks));
    }
    /* IE !zindex qreal play as int zValue() */
    styles.append(QString("z-index:%1;").arg(QString("%1").arg(zValue()).replace(".","")));
 
    QDomDocument doc;
    QDomElement blox = doc.createElement("div");
                blox.setAttribute ("id",QString("layer_%1").arg(id));
                blox.setAttribute ("style",styles);
    doc.appendChild(blox);
 
    QString errorStr;
    int errorLine, errorColumn;
    QDomDocument exdoc;
    if (!exdoc.setContent(document()->toHtml(),false, &errorStr, &errorLine, &errorColumn)) {
        return doc.toString(5);
    }
    QDomElement root = exdoc.documentElement();
    QDomNode child;
    QDomElement e = root.firstChildElement("body");
 
    ImageFindertoHtml(e,masterpath);   /* rewrite image href to new qfileinfo path image folder and write svg to png */
 
 
    /* import html to new  QDomDocument to reformat later */
    child = e.firstChild();
       while ( !child.isNull() ) {
           if ( child.isElement() ) {
            blox.appendChild(doc.importNode(child,true).toElement());
           } else if (child.isText()) {
             blox.appendChild(doc.createTextNode(child.toText().data()));
           }
         child = child.nextSibling();            
       }
 
    return doc.toString(5);
}

/* QGraphicsTextItem document()  to div layer QFileInfo f destination file html 
to save external image if exist..
*/
QString FloatDiagram::toDivHtml( QFileInfo f )
{
    ///// #define POINT_TO_MM(mm) ((mm)/2.83465058)  point px mm ?? ////
    #define ALPHAHTML(alpha) ((alpha)/254.99999999)
    QString masterpath = f.absolutePath()+"/"+FOPIMAGEDIR;
    /* Paint QGraphicsTextItem style to html css inline */
    QString styles = "position:absolute; top:"+QString("%1px")
    .arg(pos().y())+"; left:"+QString("%1px")
    .arg(pos().x())+"; width:"+QString("%1px")
    .arg(wi)+"; height:"+QString("%1px")
    .arg(hi)+"; ";
    
    if (AlphaColor < 44) {
    styles.append(QString("background-color:transparent; ") );
    } else {
    styles.append(QString("background-color:%1; ").arg( BGColor.name() ) );  
    }
    /* AlphaColor = backgroundqcolor.alpha(); */
    int alFaCol = qBound(0,AlphaColor,256);
    qreal percentos = ALPHAHTML( alFaCol );
    if (percentos < 1 && AlphaColor > 44) {
    QString Tnetto = QString("%1").arg(percentos, 0, 'f', 4);
    styles.append(QString("opacity:%1; filter: alpha(opacity=%1); -moz-opacity:%1; ").arg( Tnetto) );
    }
    /* insert border having? */
    if (BorderDicks > 0 ) {
    styles.append(QString("border:%2px solid %1; ").arg(MarginColor.name()).arg(BorderDicks));
    }
    /* IE !zindex qreal play as int zValue() */
    styles.append(QString("z-index:%1;").arg(QString("%1").arg(zValue()).replace(".","")));
    
    QDomDocument doc;
    QDomElement blox = doc.createElement("div");
                blox.setAttribute ("id",QString("layer_%1").arg(id));
                blox.setAttribute ("style",styles);
    doc.appendChild(blox);
    
    QString errorStr;
    int errorLine, errorColumn;
    QDomDocument exdoc;
    if (!exdoc.setContent(document()->toHtml(),false, &errorStr, &errorLine, &errorColumn)) {
        return doc.toString(5);
    }
    QDomElement root = exdoc.documentElement();
    QDomNode child;
    QDomElement e = root.firstChildElement("body");
    
    ImageFindertoHtml(e,masterpath);   /* rewrite image href to new qfileinfo path image folder and write svg to png */
    
    
    /* import html to new  QDomDocument to reformat later */
    child = e.firstChild();
       while ( !child.isNull() ) {
           if ( child.isElement() ) {
            blox.appendChild(doc.importNode(child,true).toElement());
           } else if (child.isText()) {
             blox.appendChild(doc.createTextNode(child.toText().data()));
           }
         child = child.nextSibling();            
       }
    
    return doc.toString(5);
}

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[wysota]

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