Class SingleBar

lib/single-bar.js:5–141

// Progress-Bar constructor
module.exports = class SingleBar extends _GenericBar{

    constructor(options, preset){
        super(_options.parse(options, preset));

        // the update timer
        this.timer = null;

        // disable synchronous updates in notty mode
        if (this.options.noTTYOutput && this.terminal.isTTY() === false){
            this.options.synchronousUpdate = false;
        }

        // update interval
        this.schedulingRate = (this.terminal.isTTY() ? this.options.throttleTime : this.options.notTTYSchedule);

        // callback used for gracefulExit
        this.sigintCallback = null;
    }

    // internal render function
    render(){
        // stop timer
        if (this.timer){
            clearTimeout(this.timer);
            this.timer = null;
        }

        // run internal rendering
        super.render();

        // add new line in notty mode!
        if (this.options.noTTYOutput && this.terminal.isTTY() === false){
            this.terminal.newline();
        }

        // next update
        this.timer = setTimeout(this.render.bind(this), this.schedulingRate);
    }

    update(current, payload){
        // timer inactive ?
        if (!this.timer) {
            return;
        }

        super.update(current, payload);

        // trigger synchronous update ?
        // check for throttle time 
        if (this.options.synchronousUpdate && (this.lastRedraw + this.options.throttleTime*2) < Date.now()){
            // force update
            this.render();
        }
    }

    // start the progress bar
    start(total, startValue, payload){