/*
* ButtonHelper
* Visit http://createjs.com/ for documentation, updates and examples.
*
* Copyright (c) 2010 gskinner.com, inc.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* @module EaselJS
*/
// namespace:
this.createjs = this.createjs||{};
(function() {
"use strict";
// constructor:
/**
* The ButtonHelper is a helper class to create interactive buttons from {{#crossLink "MovieClip"}}{{/crossLink}} or
* {{#crossLink "Sprite"}}{{/crossLink}} instances. This class will intercept mouse events from an object, and
* automatically call {{#crossLink "Sprite/gotoAndStop"}}{{/crossLink}} or {{#crossLink "Sprite/gotoAndPlay"}}{{/crossLink}},
* to the respective animation labels, add a pointer cursor, and allows the user to define a hit state frame.
*
* The ButtonHelper instance does not need to be added to the stage, but a reference should be maintained to prevent
* garbage collection.
*
* Note that over states will not work unless you call {{#crossLink "Stage/enableMouseOver"}}{{/crossLink}}.
*
* <h4>Example</h4>
*
* var helper = new createjs.ButtonHelper(myInstance, "out", "over", "down", false, myInstance, "hit");
* myInstance.addEventListener("click", handleClick);
* function handleClick(event) {
* // Click Happened.
* }
*
* @class ButtonHelper
* @param {Sprite|MovieClip} target The instance to manage.
* @param {String} [outLabel="out"] The label or animation to go to when the user rolls out of the button.
* @param {String} [overLabel="over"] The label or animation to go to when the user rolls over the button.
* @param {String} [downLabel="down"] The label or animation to go to when the user presses the button.
* @param {Boolean} [play=false] If the helper should call "gotoAndPlay" or "gotoAndStop" on the button when changing
* states.
* @param {DisplayObject} [hitArea] An optional item to use as the hit state for the button. If this is not defined,
* then the button's visible states will be used instead. Note that the same instance as the "target" argument can be
* used for the hitState.
* @param {String} [hitLabel] The label or animation on the hitArea instance that defines the hitArea bounds. If this is
* null, then the default state of the hitArea will be used. *
* @constructor
*/
function ButtonHelper(target, outLabel, overLabel, downLabel, play, hitArea, hitLabel) {
if (!target.addEventListener) { return; }
// public properties:
/**
* The target for this button helper.
* @property target
* @type MovieClip | Sprite
* @readonly
**/
this.target = target;
/**
* The label name or frame number to display when the user mouses out of the target. Defaults to "over".
* @property overLabel
* @type String | Number
**/
this.overLabel = overLabel == null ? "over" : overLabel;
/**
* The label name or frame number to display when the user mouses over the target. Defaults to "out".
* @property outLabel
* @type String | Number
**/
this.outLabel = outLabel == null ? "out" : outLabel;
/**
* The label name or frame number to display when the user presses on the target. Defaults to "down".
* @property downLabel
* @type String | Number
**/
this.downLabel = downLabel == null ? "down" : downLabel;
/**
* If true, then ButtonHelper will call gotoAndPlay, if false, it will use gotoAndStop. Default is false.
* @property play
* @default false
* @type Boolean
**/
this.play = play;
// private properties
/**
* @property _isPressed
* @type Boolean
* @protected
**/
this._isPressed = false;
/**
* @property _isOver
* @type Boolean
* @protected
**/
this._isOver = false;
/**
* @property _enabled
* @type Boolean
* @protected
**/
this._enabled = false;
// setup:
target.mouseChildren = false; // prevents issues when children are removed from the display list when state changes.
this.enabled = true;
this.handleEvent({});
if (hitArea) {
if (hitLabel) {
hitArea.actionsEnabled = false;
hitArea.gotoAndStop&&hitArea.gotoAndStop(hitLabel);
}
target.hitArea = hitArea;
}
}
var p = ButtonHelper.prototype;
/**
* <strong>REMOVED</strong>. Removed in favor of using `MySuperClass_constructor`.
* See {{#crossLink "Utility Methods/extend"}}{{/crossLink}} and {{#crossLink "Utility Methods/promote"}}{{/crossLink}}
* for details.
*
* There is an inheritance tutorial distributed with EaselJS in /tutorials/Inheritance.
*
* @method initialize
* @protected
* @deprecated
*/
// p.initialize = function() {}; // searchable for devs wondering where it is.
// getter / setters:
/**
* Use the {{#crossLink "ButtonHelper/enabled:property"}}{{/crossLink}} property instead.
* @method setEnabled
* @param {Boolean} value
* @deprecated
**/
p.setEnabled = function(value) { // TODO: deprecated.
if (value == this._enabled) { return; }
var o = this.target;
this._enabled = value;
if (value) {
o.cursor = "pointer";
o.addEventListener("rollover", this);
o.addEventListener("rollout", this);
o.addEventListener("mousedown", this);
o.addEventListener("pressup", this);
if (o._reset) { o.__reset = o._reset; o._reset = this._reset;}
} else {
o.cursor = null;
o.removeEventListener("rollover", this);
o.removeEventListener("rollout", this);
o.removeEventListener("mousedown", this);
o.removeEventListener("pressup", this);
if (o.__reset) { o._reset = o.__reset; delete(o.__reset); }
}
};
/**
* Use the {{#crossLink "ButtonHelper/enabled:property"}}{{/crossLink}} property instead.
* @method getEnabled
* @return {Boolean}
* @deprecated
**/
p.getEnabled = function() {
return this._enabled;
};
/**
* Enables or disables the button functionality on the target.
* @property enabled
* @type {Boolean}
**/
try {
Object.defineProperties(p, {
enabled: { get: p.getEnabled, set: p.setEnabled }
});
} catch (e) {} // TODO: use Log
// public methods:
/**
* Returns a string representation of this object.
* @method toString
* @return {String} a string representation of the instance.
**/
p.toString = function() {
return "[ButtonHelper]";
};
// private methods:
/**
* @method handleEvent
* @param {Object} evt The mouse event to handle.
* @protected
**/
p.handleEvent = function(evt) {
var label, t = this.target, type = evt.type;
if (type == "mousedown") {
this._isPressed = true;
label = this.downLabel;
} else if (type == "pressup") {
this._isPressed = false;
label = this._isOver ? this.overLabel : this.outLabel;
} else if (type == "rollover") {
this._isOver = true;
label = this._isPressed ? this.downLabel : this.overLabel;
} else { // rollout and default
this._isOver = false;
label = this._isPressed ? this.overLabel : this.outLabel;
}
if (this.play) {
t.gotoAndPlay&&t.gotoAndPlay(label);
} else {
t.gotoAndStop&&t.gotoAndStop(label);
}
};
/**
* Injected into target. Preserves the paused state through a reset.
* @method _reset
* @protected
**/
p._reset = function() {
// TODO: explore better ways to handle this issue. This is hacky & disrupts object signatures.
var p = this.paused;
this.__reset();
this.paused = p;
};
createjs.ButtonHelper = ButtonHelper;
}());
