<?xml version="1.0" encoding="utf-8"?>
<form title="Test form" id="frmTest" hspacing="0" vspacing="0" width="420"
	  height="360" modal="false">
	<entry control="listwidget" label="Select" id="enSEL"
		   cols="24" rows="1" mode="single" excludeFromChangeCheck="true"
		   resetPropertiesOnChange="true" eol="true">
		<subscriber signal="itemSelectionChanged" 
					target="simon2.js@listWidgetHandler"/>		
		<subscriber signal="currentItemChanged"
					target="simon2.js@listWidgetChanged"/>		
	</entry>
	<entry control="lineedit" label="First name" id="enFN" eol="true"
		   cols="24" maxlength="24" accept="alpha_only" dbfield="vcFirstName"/>
	<entry control="lineedit" label="Surname" id="enSN" eol="true"
		   cols="24" maxlength="24" accept="alpha_only" dbfield="vcSurName"/>
	<label text="Sex"/>		   
	<layout id="rdoLO" height="56" hspacing="0" scrollbar="false" 
			eol="true" type="grid"
 			vspacing="0" properties="QLayout {background-color:#ffaaaa;}">
		<buttongroup id="enSEX">
			<radiobutton id="rdoM" height="28" text="Male" default="true"/>
			<radiobutton id="rdoF" height="28" text="Female"/>
		</buttongroup>
	</layout>
	<entry control="textedit" label="Address" id="enADR" eol="true"
		   maxlength="256" accept="alpha_numeric" cols="24" rows="5"
		   dbfield="vcAddress"/>
	<entry control="checkbox" label="Employed" id="enEmp" eol="true"
		   dbfield="intEmployed"/>
	<layout id="btnbarLO"  scrollbar="false" type="horizontal" colspan="2">
		<buttongroup id="enBar">
			<button id="btnApply" api="applyChanges">
				<subscriber signal="clicked" target="simon2.js@applyButton"/>
			</button>
			<button id="btnUndo" api="undoChanges"/>
			<button id="btnOK" api="submitAndClose"/>	
		</buttongroup>
	</layout>
	<on saveChanges="Save changes before changing selection?"/>
	<on setup="simon2.js@setupForm"/>
</form>

Its still very much a work in progress, the code that takes the XML and turns it into a layout:

void clsScriptHelper::addNodesToGUI(clsXMLnode* pobjParent
                                   ,QLayout* pobjLO
                                   ,QJsonArray& raryCells
                                   ,int* pintRow, int* pintCol) {
    static const char scszLabelProperties[] =
                            "QLabel { text-align:left;"
                            "vertical-align: text-top;"
                            "border:0px;"
                            "color:#000000;"
                            "format:rich;"
                            "text-decoration:none; }";
    static int sintNextID(0);
    if ( pobjParent == nullptr || pobjLO == nullptr ) {
        return;
    }
    Qt::Alignment alignment(Qt::AlignLeft | Qt::AlignTop);
    QString strEquals(clsXMLnode::msccEquals);
    clsXMLnode* pobjNode(nullptr);
    int intCol, intRow;
    intCol = (pintCol != nullptr) ? *pintCol : -1;
    intRow = (pintRow != nullptr) ? *pintRow : 0;
    for( QJsonArray::iterator itCell=raryCells.begin()
                            ; itCell!=raryCells.end()
                            ; itCell++ ) {
        QJsonObject objCell(itCell->toObject());
        QStringList slstAttribs, slstLabel;
        QJsonArray arySubCells;
        int intNodes;
        if ( clsScriptHelper::blnProcessJSON(objCell, slstAttribs, arySubCells) == false ) {
    //Something went wrong!
            continue;
        }
    //Is there a label?
        QString strLabel(clsScriptHelper::strGetAttributeFromList(slstAttribs
                                                                 ,clsXMLnode::mscszAttrLabel));
        if ( strLabel.isEmpty() != true ) {
            intNodes = 2;
            slstLabel << clsCNT::mscszLabel
                      << (clsXMLnode::mscszAttrID
                        + strEquals
                        + QString("lbl%1gnrtd").arg(++sintNextID))
                      << (clsXMLnode::mscszAttrText
                        + strEquals
                        + strLabel)
                      << (clsXMLnode::mscszAttrProperties
                        + strEquals
                        + scszLabelProperties);
        } else {
            intNodes = 1;
        }
        for( int intNode=1; intNode<=intNodes; intNode++ ) {
    //Create node
            QJsonArray* paryCells(nullptr), aryEmpty;
            QStringList* pslstAttrs(nullptr);
            QString strControl, strGroup;
            if ( intNode == 1 && slstLabel.isEmpty() != true ) {
                pslstAttrs = &slstLabel;
                paryCells = &aryEmpty;
            } else {
                pslstAttrs = &slstAttribs;
                paryCells = &arySubCells;
    //Get control type from cell
                strControl = clsScriptHelper::strGetAttributeFromList(*pslstAttrs, clsXMLnode::mscszAttrControl);
                if ( strControl.isEmpty() != true ) {
                    QString strFirst(pslstAttrs->first());
                    if ( strFirst.indexOf(strEquals) == -1 ) {
    //Discard first attribute
                        pslstAttrs->takeFirst();
    //Replace with control type
                        pslstAttrs->insert(0, strControl);
                    }
                }
            }
            if ( pslstAttrs == nullptr ) {
                break;
            }
            pobjNode = new clsXMLnode(*pslstAttrs, pobjParent);
            if ( pobjNode == nullptr || pobjNode->blnCanBeVisible() != true ) {
                continue;
            }
            QWidget* pobjWidget(pobjNode->pobjGetWidget());
            if ( pobjWidget != nullptr ) {
                const QString cstrName(pobjNode->cstrGetNodeName());
                clsQtLayout* pobjLayout(nullptr);
                bool blnAdd(true);
                if ( cstrName.compare(clsCNT::mscszLayout) == 0 ) {
                    pobjLayout = static_cast<clsQtLayout*>(pobjWidget);
                    pobjWidget = pobjLayout->pobjGetScroller();
                } else if ( pobjParent != nullptr ) {
                    clsXMLnode* pobjGrandParent(pobjParent->pobjGetParent());
                    if ( pobjGrandParent != nullptr ) {
                        const QString cstrGPname(pobjGrandParent->cstrGetNodeName());
                        if ( cstrGPname.compare(clsCNT::mscszLayout) == 0 ) {
    //The grandparent of this node is a layout, is the parent of this node a layout?
                            const QString cstrPname(pobjParent->cstrGetNodeName());
                            if ( cstrPname.compare(clsCNT::mscszLayout) != 0 ) {
                                pobjLayout = static_cast<clsQtLayout*>(
                                                pobjGrandParent->pobjGetWidget());
                                pobjLayout->addWidget(pobjWidget);
                                blnAdd = false;
                            }
                        }
                    }
                }
                if ( blnAdd == true ) {
                    QGridLayout* pobjGridLO(nullptr);
                    if ( pobjLayout == nullptr ) {
                        pobjGridLO = qobject_cast<QGridLayout*>(pobjLO);
                    }
                    intCol++;
                    if ( pobjGridLO != nullptr ) {
                        pobjGridLO->addWidget(pobjWidget, intRow, intCol, alignment);
                    } else {
                        pobjGridLO = qobject_cast<QGridLayout*>(pobjLO);
                        if ( pobjGridLO != nullptr ) {
                            QString strColSpan(pobjNode->strGetAttribute(clsXMLnode::mscszAttrColSpan));
                            int intColSpan(strColSpan.toInt());
                            if ( intColSpan == 0 ) {
                                intColSpan = 1;
                            }
                            pobjGridLO->addWidget(pobjWidget, intRow, intCol, 1, intColSpan);
                        } else {
                            pobjLO->addWidget(pobjWidget);
                        }
                    }
                    QString strEOL(pobjNode->strGetAttribute(clsXMLnode::mscszAttrEndOfLine));
                    if ( strEOL.compare(clsXMLnode::mscszTrue) == 0 ) {
                        intRow++;
                        intCol = -1;
                    }
                }
            }
        }
        if ( arySubCells.size() > 0 ) {
            clsScriptHelper::addNodesToGUI(pobjNode, pobjLO, arySubCells, &intRow, &intCol);
        }
    }
}

The question is why does the checkbox overlap the row above ?