BangleApps/apps/blc/blc.settings.js

// Change settings for BinaryClk

(function(back){
	
	// color array -- don't change order unless change oder in BinaryClk.js		
	let LED_ColorNames = ["white", "red", "green", "blue", "yellow", "magenta", "cyan", "black"];	

	var FILE = "BinaryClk.settings.json";
	// Load settings
	var settings = Object.assign({
		HourCol: "red",
		MinCol: "green",
		DayCol: "yellow",
		MonCol: "yellow",
		RingOn: true,
	}, require('Storage').readJSON(FILE, true) || {});

	function writeSettings(){
		require('Storage').writeJSON(FILE, settings);
	}

	// Helper method which uses int-based menu item for set of string values
	function stringItems(startvalue, writer, values) {
		return{
			value: (startvalue === undefined ? 0 : values.indexOf(startvalue)),
			format: v => values[v],
			min: 0,
			max: values.length - 1,
			wrap: true,
			step: 1,
			onchange: v => {
				writer(values[v]);
				writeSettings();
			}
		};	
	}

	// Helper method which breaks string set settings down to local settings object
	function stringInSettings(name, values) {
		return stringItems(settings[name], v => settings[name] = v, values);
	}

	// Show the menu
	var mainmenu = {
		"" : {
			 "title" : "BinaryCLK" 
		},
		"< Back" : () => back(),
		'Color Hour.:': stringInSettings("HourCol", LED_ColorNames),
		'Color Minute:': stringInSettings("MinCol", LED_ColorNames),
		'Color Day': stringInSettings("DayCol", LED_ColorNames),
		'Color Month:': stringInSettings("MonCol", LED_ColorNames),
		'LED ring on/off':	{
			value: (settings.RingOn !== undefined ? settings.RingOn : true),
			onchange: v => {
				settings.RingOn = v;
				writeSettings();
			}
		},
	};
	
	// Show submenues
	//var submenu1 = {
	//"": {
	//  "title": "Show sub1..."
	//},
	//"< Back": () => E.showMenu(mainmenu),
	//"ItemName": stringInSettings("settingsVar", ["Yes", "No", "DontCare"]),
	//};
	
	E.showMenu(mainmenu);
});