openFrameworks - callback parameterGroup . ofParameterGroup / Changed_params / name = e.getName()

ofParameterGroup_Changed_params

// .h
ofParameterGroup params{"Params"};
void Changed_Params(ofAbstractParameter &e);

bool DISABLE_Callbacks = false; // to avoid callback crashes or to enable only after setup()

// .cpp
// setup()
//params
SHOW_gui.set("SHOW_gui", true);
params.setName("AppSettings");
params.add(SHOW_gui);
params.add(SHOW_User);
...

ofAddListener(params.parameterChangedE(), this, &ofApp::Changed_Params); // setup()
ofRemoveListener(params.parameterChangedE(), this, &ofApp::Changed_Params); // exit()

// callback for a parameter group  
void ofApp::Changed_Params(ofAbstractParameter &e)
{
	if (DISABLE_Callbacks) return;
	
	string name = e.getName();
	ofLogNotice() << __FUNCTION__ << name << " : " << e;

	if (name == SHOW_gui.getName())
	{
		if (SHOW_gui)
		{}
	}
	else if (name == SHOW_User.getName())
	{
		if (SHOW_User)
		{}
	}
}