// position the little LED in the top right hand corner
int led_x = (Display.getWidth() - reg_led.getWidth() - 5);
int led_y = 5;
MsbConfig sc_btn_config = new MsbConfig();
MsbState sc_btn_state = new MsbState(Constants.REG_BTN_STATE, "Register Listener", "Register Listener");
sc_btn_state.setbmp_focused(reg_focused);
sc_btn_state.setbmp_unfocused(reg_unfocused);
sc_btn_state.setbmp_clicked(reg_clicked);
sc_btn_state.setbmp_unclicked(reg_focused);
sc_btn_config.addState(sc_btn_state);
msbf_sc = new MultiStateButtonField(sc_btn_config, new RegisterListenerCommand(), 0, Field.FIELD_HCENTER);
icon_manager.add(msbf_sc,x1,y);
MsbConfig sr_btn_config = new MsbConfig();
MsbState sr_btn_state = new MsbState(Constants.UNR_BTN_STATE, "Unregister Listener", "Unregister Listener");
sr_btn_state.setbmp_focused(unr_focused);
sr_btn_state.setbmp_unfocused(unr_unfocused);
sr_btn_state.setbmp_clicked(unr_clicked);
sr_btn_state.setbmp_unclicked(unr_focused);
sr_btn_config.addState(sr_btn_state);
msbf_sr = new MultiStateButtonField(sr_btn_config, new UnregisterListenerCommand(), 0, Field.FIELD_HCENTER);
icon_manager.add(msbf_sr,x2,y);
if (_listener_mgr.is_listening()) {
led = new BitmapField(reg_led);