- mouse.signal_button_press.connect(sigc::mem_fun(this, &Viewer::button_press));
- mouse.signal_button_release.connect(sigc::mem_fun(this, &Viewer::button_release));
- mouse.signal_axis_motion.connect(sigc::mem_fun(this, &Viewer::axis_motion));
+ mouse.signal_button_press.connect(sigc::bind_return(sigc::mem_fun(this, &Viewer::button_press), false));
+ mouse.signal_button_release.connect(sigc::bind_return(sigc::mem_fun(this, &Viewer::button_release), false));
+ mouse.signal_axis_motion.connect(sigc::bind_return(sigc::mem_fun(this, &Viewer::axis_motion), false));