xfdrawpolyline.cxx

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/*************************************************************************
 * @file
 * Polyline.
 ************************************************************************/
#include <xfilter/xfdrawpolyline.hxx>
#include <xfilter/ixfattrlist.hxx>
#include <rtl/ustrbuf.hxx>
 
XFDrawPolyline::XFDrawPolyline()
{
}
 
void XFDrawPolyline::ToXml(IXFStream *pStrm)
{
    IXFAttrList *pAttrList = pStrm->GetAttrList();
 
    pAttrList->Clear();
    //view-box:
    XFRect  rect = CalcViewBox();
    OUString strViewBox = "0 0 " +
        OUString::number(rect.GetWidth()*1000) + " " +
        OUString::number(rect.GetHeight()*1000);
    pAttrList->AddAttribute( "svg:viewBox", strViewBox);
 
    //points
    OUStringBuffer strPoints;
    for (auto const& point : m_aPoints)
    {
        double  x = (point.GetX()-rect.GetX())*1000;
        double  y = (point.GetY()-rect.GetY())*1000;
        strPoints.append( OUString::number(x) + "," + OUString::number(y) + " ");
    }
    strPoints.stripEnd(' ');
    pAttrList->AddAttribute( "draw:points", strPoints.makeStringAndClear());
 
    SetPosition(rect.GetX(),rect.GetY(),rect.GetWidth(),rect.GetHeight());
    XFDrawObject::ToXml(pStrm);
 
    pStrm->StartElement( "draw:polyline" );
    ContentToXml(pStrm);
    pStrm->EndElement( "draw:polyline" );
}
 
XFRect  XFDrawPolyline::CalcViewBox()
{
    double  x1 = 0;
    double  y1 = 0;
    double  x2 = 0;
    double  y2 = 0;
    XFPoint aPoint;
 
    assert(!m_aPoints.empty());
 
    x1 = aPoint.GetX();
    x2 = aPoint.GetX();
    y1 = aPoint.GetY();
    y2 = aPoint.GetY();
    for (auto const& point : m_aPoints)
    {
        if( x1>point.GetX() )
            x1 = point.GetX();
        if( x2<point.GetX() )
            x2 = point.GetX();
 
        if( y1>point.GetY() )
            y1 = point.GetY();
        if( y2<point.GetY() )
            y2 = point.GetY();
    }
    return XFRect(x1,y1,x2-x1,y2-y1);
}
 
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