neo-blessed/lib/widgets/button.js

/**
 * button.js - button element for blessed
 * Copyright (c) 2013-2015, Christopher Jeffrey and contributors (MIT License).
 * https://github.com/chjj/blessed
 */

/**
 * Modules
 */

var Node = require('./node');
var Input = require('./input');

/**
 * Button
 */

function Button(options) {
  var self = this;

  if (!(this instanceof Node)) {
    return new Button(options);
  }

  options = options || {};

  if (options.autoFocus == null) {
    options.autoFocus = false;
  }

  Input.call(this, options);

  this.on('keypress', function(ch, key) {
    if (key.name === 'enter' || key.name === 'space') {
      return self.press();
    }
  });

  if (this.options.mouse) {
    this.on('click', function() {
      return self.press();
    });
  }
}

Button.prototype.__proto__ = Input.prototype;

Button.prototype.type = 'button';

Button.prototype.press = function() {
  this.focus();
  this.value = true;
  var result = this.emit('press');
  delete this.value;
  return result;
};

/**
 * Expose
 */

module.exports = Button;