Get paging info in preDrawCallback function

beginner_

Datatables 1.10.

I initialize my table like this:

dataTable = $('#mytable').DataTable({
    //...
    "preDrawCallback": function( settings ) {
                    var table = dataTable;
                    if (!table) {
                            table = new $.fn.dataTable.Api( settings );
                    }
                    // page is 0 even if I previously set it to different value in hashchange function
                    var page = table.page() ;
                    // push state
            }
)}

$(window).bind( 'hashchange', function( event ) {
    // get page from state via getState
   // Code not run when state was change by datatables (eg. in preDrawCallBack)
    dataTable.page(page);
    alert(dataTable.page()); // shows correct value, eg. page
    dataTable.draw():
});

Minor Issue:

dataTable variable is undefined on first call hence the ìf` block. How should I do this correctly?

Explanation: I use history API (pushState, getState) to enable the back/forward buttons of the browser for pagination navigation and bookmarking of specific pages.

Main issue:

table.page in preDrawCallback returns 0 when pressing the back button even if previous page was any other page like page 5.

So state is changed to page 5, pop-up shows 5 correctly, then preDrawCallback is called and suddenly page value is 0 again.
If I use normal pagination controls of datatables the page values in preDrawCallback are correct.

What am I doing wrong? What are alternatives?

beginner_

dataTable.draw(false):

makes this work.