function selectHandler() {
    // this works!!
    $scope.numberOfRowsShown = table.getDataTable().getNumberOfRows();
};


function stateChangeHandler() {
    // this does not work..
    $scope.numberOfRowsShown = table.getDataTable().getNumberOfRows();
    // correct output in the console..
    console.log(table.getDataTable().getNumberOfRows());
};

// Setup listener to listen for clicks on table rows and process the selectHandler.
google.visualization.events.addListener(table, 'select', selectHandler);

// Setup listeners for statechange in the slider range filters.
google.visualization.events.addListener(dateOfLastAccessFilter, 'statechange', stateChangeHandler);
google.visualization.events.addListener(timeSinceLastAccessFilter, 'statechange', stateChangeHandler);