XML : QT Reading XML file, structure

I am using QXmlStreamReader to process an XML file. The read loop is quite straight forward:

      if ( !file.open(QFile::ReadOnly | QFile::Text) ) {          strErrors.append(mcszConfigFile);          strErrors.append("\n\nDoes not exists!\n\n");      }      xmlrdr.setDevice(&file);      xmlrdr.readNext();      blnRootFound = false;      while( !xmlrdr.atEnd() ) {          if ( xmlrdr.isStartElement() ) {              QXmlStreamAttributes attrs = xmlrdr.attributes();              QStringRef srfNodeName = xmlrdr.name();              bool blnEndElement = xmlrdr.isEndElement();              bool blnStartElement = xmlrdr.isStartElement();              bool blnInvalid = true;                if ( attrs.length() > 0 ) {                  QString strID, strNodeName = srfNodeName.toString();                    if ( attrs.hasAttribute(mcszXMLattrID) == false ) {                      strErrors.append("Node: ");                      strErrors.append(qPrintable(srfNodeName.toString()));                      strErrors.append("Has no id!\n");                      break;                  }                  strID = attrs.value(mcszXMLattrID).toString();                    if ( strNodeName.compare(mcszXMLnodeRoot) == 0 ) {                      blnRootFound = true;                      blnInvalid = false;                      mstrRootID = strID;                  } else if ( strNodeName.compare(mcszXMLnodeButton) == 0                           || strNodeName.compare(mcszXMLnodeButtonBar) == 0                           || strNodeName.compare(mcszXMLnodeOption) == 0 ) {                      blnInvalid = false;                  } else if ( strNodeName.compare(mcszXMLnodeControl) == 0 ) {                      for( int t=0; mcpszValidControlTypes[t]!=NULL; t++ ) {                          if ( strID.compare(mcpszValidControlTypes[t]) == 0 ) {                              blnInvalid = false;                              break;                          }                      }                  }                  if ( strID.length() > 0 && blnInvalid == false ) {                      clsXMLnode objNode = clsXMLnode(strNodeName, &attrs, this);                                          msmapNodes.insert(std::pair<QString, clsXMLnode>(strID, objNode));                      msmapAreas.insert(std::pair<QString, QRect>(strID, objNode.rctGetGeom()));                      if ( blnStartElement == true ) {                        }                  }              }          }          xmlrdr.readNext();      }      if ( file.isOpen()  ) {          file.close();      }    

The XML that I am reading:

      <?xml version="1.0" encoding="utf-8"?>      <!--       Node:          gui       Attrbuttes:    left, right, top and bottom defines the pixel white space to allow                      from the edge of the display              language, should be set to the appropriate country code, an XML file named using              the country code must exist, e.g. 44.xml      //-->      <gui id="root" bottom="0" left="0" right="0" top="24" language="44">        <control id="trainstrip"             x="(center:SCREEN) - (25%:SCREEN_WIDTH)" y="(top:SCREEN)" height="40px" width="(50%:SCREEN_WIDTH)"/>        <control id="elevationstrip"                 x="(left:trainstrip) - 56px" y="(top:trainstrip) + (height:trainstrip) + 24px" width="56px" height="{75%:SCREEN_HEIGHT}"/>        <control id="lofmimics"             color_arc="#ffaaaaaa"                 color_axis="#fff0000"                 color_bg="#ffaaaaaa"                 color_needle="#ffffff00"                 color_min_limit="#ffbbbb00"                 color_max_limit="#ffcc00cc"                 color_port="#ff00aa00"                 color_starboard="'#ffaa0000"                 elevation_height="275px"             elevation_mech_max="85"                 elevation_mech_min="-10"                 elevation_max="85"                 elevation_margin_left="64px"                 elevation_margin_bottom="64px"                 elevation_min="-10"                 elevation_pensize_limit="3"                 elevation_pensize_reading="3"                 elevation_width="[elevation_height]"                 elevation_x="0px"             elevation_y="0px"                 training_mech_starboard="170"                 training_mech_port="-170"                 training_pensize_port="5"                 training_pensize_starboard="5"                 training_pensize_limit="3"                 training_pensize_reading="3"                 training_starboard="150"                 training_port="-150"                 training_width="(left:elevationstrip)"                 training_height="([training_width])"             training_x="([elevation_x])"             training_y="([elevation_height])"                 x="(left:SCREEN)"             width="([x]:elevationstrip)"             height="([training_height]) + ([elevation_height])"                 y="(bottom:SCREEN) - ([height])"/>        <buttonbar id="modes"                     height="50%"               width="100px"               x="(RIGHT:SCREEN) - ([width])"               y="(TOP:SCREEN)"               title="MODE"               color_bg="#ffaaaaaa"               border="inset:#ffcccccc,#ff333333"               button_height="24px"                   button_width="80px"               vertical_space="4px">          <button id="btnsetup" color_bg="#ff3399ff" x="0px" y="{top:modes}">            <option value="0" text="operate<"/>            <option value="1" text="setup"/>            <option value="2" text="install"/>            <option value="3" text="startup"/>            <option value="4" text="shutdown"/>          </button>             </buttonbar>      </gui>    

The issue I'm having is that the flags blnEndElement and blnStartElement do not appear to accurately reflect the correct states when reading the file, blnEndElement is always false and blnStartElement is always true.

What I want to do is build up the node/element hierarchy whilst reading and processing the XML.