def display_file(filename, app, force_2d=False, usescenegraph=False):
w = EMWidgetFromFile(filename, application=app, force_2d=force_2d)
w.setWindowTitle(base_name(filename))
app.show_specific(w)
try:
w.optimally_resize()
except:
pass
try:
w.raise_()
except:
pass
return w
