doxyqml not documenting qml files properly

Question

I'm documenting my qml files using doxygen, for supporting .qml files, i installed doxyqml but this is also not documenting all the functions inside the file. For example,

Item {
    id: mainV
    property real ct: 0.5
    signal sectionHdrUnselect()
    function onOkClicked()
    {
            msgDlgId.close()
    }
    ListView {
        id: view
        property var collapsed: ({})
        function hideSection( section ) {
        }

}

In this sample .qml file, here only onOkClicked() function, property real ct, signal sectionHdrUnselect, ListView view are getting documented whereas the function, properties inside ListView is not getting documented.

Why is it not getting documented in doxygen? Is there any way I can document all the properties, signals, functions in .qml file?

These are the changes in configuration file which are different from default configuration settings(generated using cmd: doxygen -x doxyfile).

OUTPUT_DIRECTORY       = docs
EXTENSION_MAPPING      = qml=C++
TIMESTAMP              = YES
EXTRACT_ALL            = YES
EXTRACT_PRIVATE        = YES
EXTRACT_PACKAGE        = YES
EXTRACT_LOCAL_METHODS  = YES
SHOW_HEADERFILE        = NO
SHOW_INCLUDE_FILES     = NO
FILE_PATTERNS          = *.c \
                         *.cpp \
                         *.h \
                         *.hpp \
                         *.qml
RECURSIVE              = YES
FILTER_PATTERNS        = *.qml=doxyqml
GENERATE_QHP           = YES
QCH_FILE               = MyApp.qch
QHP_NAMESPACE          = org.doxygen.myapp
MATHJAX_RELPATH        = http://cdn.mathjax.org/mathjax/latest
LATEX_CMD_NAME         = latex
GENERATE_XML           = YES
PREDEFINED             = WIN32 \
                         Q_OS_IOS \
                         Q_OS_ANDROID \
                         Q_OS_WINDOWS
DOT_COMMON_ATTR        = "fontname=FreeSans,fontsize=10"
DOT_EDGE_ATTR          = "labelfontname=FreeSans,labelfontsize=10"