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Viewing file:     checkbox.js (1.8 KB)      -rw-r--r--

/**
 * checkbox.js - checkbox 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');

/**
 * Checkbox
 */

function Checkbox(options) {
  var self = this;

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

  options = options || {};

  Input.call(this, options);

  this.text = options.content || options.text || '';
  this.checked = this.value = options.checked || false;

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

  if (options.mouse) {
    this.on('click', function() {
      self.toggle();
      self.screen.render();
    });
  }

  this.on('focus', function() {
    var lpos = self.lpos;
    if (!lpos) return;
    self.screen.program.lsaveCursor('checkbox');
    self.screen.program.cup(lpos.yi, lpos.xi + 1);
    self.screen.program.showCursor();
  });

  this.on('blur', function() {
    self.screen.program.lrestoreCursor('checkbox', true);
  });
}

Checkbox.prototype.__proto__ = Input.prototype;

Checkbox.prototype.type = 'checkbox';

Checkbox.prototype.render = function() {
  this.clearPos(true);
  this.setContent('[' + (this.checked ? 'x' : ' ') + '] ' + this.text, true);
  return this._render();
};

Checkbox.prototype.check = function() {
  if (this.checked) return;
  this.checked = this.value = true;
  this.emit('check');
};

Checkbox.prototype.uncheck = function() {
  if (!this.checked) return;
  this.checked = this.value = false;
  this.emit('uncheck');
};

Checkbox.prototype.toggle = function() {
  return this.checked
    ? this.uncheck()
    : this.check();
};

/**
 * Expose
 */

module.exports = Checkbox;