private async void PrintButtonClick(object sender, RoutedEventArgs e)
{
write_buffers(); // TODO temp
printHelper.ResetElements();
//save_ink(cur_page.ToString() + page_file_name);
//go_to_page(2);
foreach (var inkPage in pageBuffers)
{
printHelper.AddElement(
await bitMapHelper.UIElementToGridImage(inkPage.Value._grid)
);
}
// load/iterate through each page to capture the
// pngs we need to print
printHelper.showDialog();
}