Adding TabButton dynamically to TabBar in QML

I am trying to add a tabButton to TabBar dynamically on pressing a button but i have spent a lot of time searching but i am not getting how to add, below is the code which i am working on :

MyTabButton.qml

import QtQuick 2.4
import QtQuick.Controls 2.2

Item
{
    property int BtnWidth:0
    property int BtnHeight:0
    property string BtnText: ""
    property bool isChecked : false

    TabButton
    {
        id:tabBtn
        text:BtnText
        width:BtnWidth
        height:BtnHeight

    }
}

MainForm.qml

import QtQuick 2.4
import QtQuick.Controls 2.2

Rectangle
{
    Button
    {
        id:button
        width:100
        height:100
        anchors.top:parent.top
        text:qStr("Add")
        onClicked{
            //How to add logic here to add tab in below tabBar.
        }
    }
    TabBar
    {
        id:tabBar
        anchors.top:button.bottom
        width:500
        height:500
    }
}

You need to have something like a Component that is a TabButton. Your file MyTabButton.qml won't result in a TabButton, but instead an Item containing a TabButton, but with this, your TabBar does not know what to do.

So your file will need to have TabButton as root element

//MyTabButton.qml

import QtQuick 2.4
import QtQuick.Controls 2.2
TabButton
{
    id: tabBtn
    // customize as you like
}

Then you create a Component of this in your file where you want to use it. (e.g. main.qml)

import QtQuick 2.4
import QtQuick.Controls 2.0

ApplicationWindow {
    width: 800
    height: 600
    visible: true

    TabBar {
        id: tabBar
        width: 800
        height: 50
    }

    // The component is like a factory for MyTabButtons now.
    // Use myTabButton.createObject(parent, jsobject-with-property-assignments) to create instances.
    Component {
        id: myTabButton
        MyTabButton {
            /// EDIT ACCORDING TO YOUR COMMENTS ***
            Connections {
                target: tabBar
                onCurrentIndexChanged: doSomething()
            }
            /// EDIT OVER
        }
    }

    Button {
        anchors.centerIn: parent
        // Create a object out of the component, and add it to the container
        onClicked: tabBar.addItem(myTabButton.createObject(tabBar /*, { object to set properties }*/))
    }
}