constructor and options handling.

lib/program.js

@@ -619,7 +619,7 @@ Program.prototype._bindResponse = function(s) {
 };
 
 Program.prototype.receive = function(text, callback) {
-  var listeners = this.listeners('keypress')
+  var listeners = (this._events && this._events['keypress']) || []
     , bak = listeners.slice()
     , self = this;
 
@@ -648,7 +648,7 @@ Program.prototype.receive = function(text, callback) {
 };
 
 Program.prototype.receive_ = function(text, callback) {
-  var listeners = this.listeners('keypress')
+  var listeners = (this._events && this._events['keypress']) || []
     , bak = listeners.slice()
     , self = this;
 
@@ -701,7 +701,7 @@ Program.prototype.rsetx = function(x) {
   if (!x) return;
   return x > 0
     ? this.forward(x)
-    : this.back(x);
+    : this.back(-x);
 };
 
 Program.prototype.rsety = function(y) {
@@ -709,12 +709,12 @@ Program.prototype.rsety = function(y) {
   if (!y) return;
   return y > 0
     ? this.up(y)
-    : this.down(y);
+    : this.down(-y);
 };
 
 Program.prototype.rmove = function(x, y) {
-  this.rsetX(x);
+  this.rsetx(x);
-  this.rsetY(y);
+  this.rsety(y);
 };
 
 Program.prototype.simpleInsert = function(ch, i, attr) {

lib/widget.js

@@ -15,6 +15,10 @@ var EventEmitter = require('events').EventEmitter;
  */
 
 function Node(options) {
+  if (!(this instanceof Node)) {
+    return new Node(options);
+  }
+
   EventEmitter.call(this);
 
   this.options = options || {};
@@ -90,6 +94,19 @@ Node.prototype.detach = function(element) {
 function Screen(options) {
   var self = this;
 
+  if (!(this instanceof Screen)) {
+    return new Screen(options);
+  }
+
+  if (options && options.rsety && options.listen) {
+    options = { program: options };
+  }
+
+  options = options || {};
+  options.program = options.program
+    || require('./program').global
+    || new (require('./program'))(options);
+
   if (!Screen.global) {
     Screen.global = this;
   }
@@ -547,6 +564,10 @@ Screen.prototype.fillRegion = function(attr, ch, xi, xl, yi, yl) {
 function Element(options) {
   var self = this;
 
+  if (!(this instanceof Element)) {
+    return new Element(options);
+  }
+
   Node.call(this, options);
 
   this.position = {
@@ -997,6 +1018,9 @@ Element.prototype.__defineSetter__('rbottom', function(val) {
  */
 
 function Box(options) {
+  if (!(this instanceof Box)) {
+    return new Box(options);
+  }
   Element.call(this, options);
 }
 
@@ -1240,6 +1264,10 @@ Text.prototype.__proto__ = Box.prototype;
  */
 
 function Line(options) {
+  if (!(this instanceof Line)) {
+    return new Line(options);
+  }
+
   var orientation = options.orientation || 'vertical';
   delete options.orientation;
 
@@ -1272,6 +1300,9 @@ Line.prototype.__proto__ = Box.prototype;
  */
 
 function ScrollableBox(options) {
+  if (!(this instanceof ScrollableBox)) {
+    return new ScrollableBox(options);
+  }
   Box.call(this, options);
   this.scrollable = true;
   this.childOffset = 0;
@@ -1313,6 +1344,10 @@ ScrollableBox.prototype.scroll = function(offset) {
 function List(options) {
   var self = this;
 
+  if (!(this instanceof List)) {
+    return new List(options);
+  }
+
   ScrollableBox.call(this, options);
 
   this.items = [];
@@ -1457,6 +1492,10 @@ List.prototype.down = function(offset) {
 function ScrollableText(options) {
   var self = this;
 
+  if (!(this instanceof ScrollableText)) {
+    return new ScrollableText(options);
+  }
+
   options.alwaysScroll = true;
 
   ScrollableBox.call(this, options);
@@ -1560,6 +1599,9 @@ ScrollableText.prototype._recalculateIndex = function() {
  */
 
 function Input(options) {
+  if (!(this instanceof Input)) {
+    return new Input(options);
+  }
   Box.call(this, options);
 }
 
@@ -1570,6 +1612,9 @@ Input.prototype.__proto__ = Box.prototype;
  */
 
 function Textbox(options) {
+  if (!(this instanceof Textbox)) {
+    return new Textbox(options);
+  }
   Input.call(this, options);
   this.screen._listenKeys(this);
 }
@@ -1669,6 +1714,9 @@ Textbox.prototype.setEditor = function(callback) {
  */
 
 function Textarea(options) {
+  if (!(this instanceof Textarea)) {
+    return new Textarea(options);
+  }
   Input.call(this, options);
 }
 
@@ -1679,6 +1727,9 @@ Textarea.prototype.__proto__ = Input.prototype;
  */
 
 function Button(options) {
+  if (!(this instanceof Button)) {
+    return new Button(options);
+  }
   Input.call(this, options);
 }
 
@@ -1689,6 +1740,9 @@ Button.prototype.__proto__ = Input.prototype;
  */
 
 function ProgressBar(options) {
+  if (!(this instanceof ProgressBar)) {
+    return new ProgressBar(options);
+  }
   Input.call(this, options);
   this.filled = options.filled || 0;
   if (typeof this.filled === 'string') {