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<!DOCTYPE html>
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<title>JSDoc: Source: data/scene/Loader.js</title>
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<h1 class="page-title">Source: data/scene/Loader.js</h1>
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<article>
<pre class="prettyprint source linenums"><code>//------------------------------------------------------------------------------
// Constructor scope
//------------------------------------------------------------------------------
/**
* Creates a new instance of the Loader class.
*
* @constructor
* @extends rune.scene.Scene
*
* @param {rune.system.Config} options
*
* @class
* @classdesc
*
* The Loader class is a Scene that loads and encodes the resource files used
* by the current application. The class is used by Rune to ensure that all the
* necessary resources are available in the resource library before the
* application logic begins.
*/
rune.data.Loader = function(options) {
//--------------------------------------------------------------------------
// Private properties
//--------------------------------------------------------------------------
/**
* The primary (and only) camera.
*
* @type {rune.camera.Camera}
* @private
*/
this.m_camera = null;
/**
* Logo graphics.
*
* @type {rune.display.Graphic}
* @private
*/
this.m_logo = null;
/**
* The stage consists of two stages; load resources and fade-in / -out
* transitions. When both are completed, the next scene is activated.
*
* @type {number}
* @private
*/
this.m_numStepCompleted = 0;
/**
* An instance of the Config class.
*
* @type {rune.system.Config}
* @private
*/
this.m_options = options;
/**
* The progress bar.
*
* @type {Object}
* @private
*/
this.m_progressbar = null;
/**
* Boot sound.
*
* @type {rune.media.Sound}
* @private
*/
this.m_sound = null;
//--------------------------------------------------------------------------
// Super call
//--------------------------------------------------------------------------
/**
* Extend Scene.
*/
rune.scene.Scene.call(this);
};
//------------------------------------------------------------------------------
// Inheritance
//------------------------------------------------------------------------------
rune.data.Loader.prototype = Object.create(rune.scene.Scene.prototype);
rune.data.Loader.prototype.constructor = rune.data.Loader;
//------------------------------------------------------------------------------
// Private static constants
//------------------------------------------------------------------------------
/**
* Start and stop delay.
*
* @constant {number}
* @private
*/
rune.data.Loader.DELAY_DURATION = 1000;
/**
* The length of the fade effects.
*
* @constant {number}
* @private
*/
rune.data.Loader.FADE_DURATION = 2500;
//------------------------------------------------------------------------------
// Override public prototype methods (ENGINE)
//------------------------------------------------------------------------------
/**
* @inheritDoc
*/
rune.data.Loader.prototype.init = function() {
rune.scene.Scene.prototype.init.call(this);
this.m_initLogo();
this.m_initProgressbar();
this.m_initSound();
};
/**
* @inheritDoc
*/
rune.data.Loader.prototype.dispose = function() {
this.m_disposeSound();
this.m_disposeProgressbar();
this.m_disposeLogo();
rune.scene.Scene.prototype.dispose.call(this);
};
//------------------------------------------------------------------------------
// Override protected prototype methods
//------------------------------------------------------------------------------
/**
* @inheritDoc
*/
rune.data.Loader.prototype.m_initCamera = function() {
rune.scene.Scene.prototype.m_initCamera.call(this);
this.m_camera = this['cameras'].getCameraAt(0);
this.m_camera['fade']['opacity'] = 1.0;
this['timers'].create({
duration: rune.data.Loader.DELAY_DURATION,
onComplete: this.m_fadeIn,
scope: this
});
};
//------------------------------------------------------------------------------
// Private prototype methods
//------------------------------------------------------------------------------
/**
* Creates the logo.
*
* @throws {Error} If a logo already exists.
*
* @return {undefined}
* @private
*/
rune.data.Loader.prototype.m_initLogo = function() {
this.m_disposeLogo();
if (this.m_logo == null) {
this.m_logo = new rune.data.Logo();
if (this['application']['screen']['width'] >= 1280 &&
this['application']['screen']['height'] >= 720) {
this.m_logo.scaleX = 2.0;
this.m_logo.scaleY = 2.0;
}
this.m_logo["center"] = this["application"]["screen"]["center"];
this["stage"].addChild(this.m_logo);
} else throw new Error();
};
/**
* Creates the progress bar.
*
* @throws {Error} If a progress bar already exists.
*
* @return {undefined}
* @private
*/
rune.data.Loader.prototype.m_initProgressbar = function() {
this.m_disposeProgressbar();
if (this.m_progressbar == null) {
this.m_progressbar = new rune.ui.Progressbar(
this["application"]["screen"]["width"],
1
);
if (this['application']['screen']['width'] >= 1280 &&
this['application']['screen']['height'] >= 720) {
this.m_progressbar.scaleX = 2.0;
this.m_progressbar.scaleY = 2.0;
}
this.m_progressbar.bottom = this["application"]["screen"]["height"];
this.m_progressbar.progress = 0.0;
this.m_camera.addChild(this.m_progressbar);
} else throw new Error();
};
/**
* Creates the Sound object used to play the startup sound.
*
* @return {undefined}
* @private
*/
rune.data.Loader.prototype.m_initSound = function() {
this.m_disposeSound();
if (this.m_sound == null) {
this.m_sound = this['application']['sounds']['sound'].get("rune_sound_startup");
}
};
/**
* Removes the Sound object used to play the startup sound.
*
* @return {undefined}
* @private
*/
rune.data.Loader.prototype.m_disposeSound = function() {
if (this.m_sound != null) {
this.m_sound.dispose();
this.m_sound = null;
}
};
/**
* Removes the progress bar.
*
* @return {undefined}
* @private
*/
rune.data.Loader.prototype.m_disposeProgressbar = function() {
if (this.m_progressbar != null) {
this.m_progressbar.parent.removeChild(this.m_progressbar, true);
this.m_progressbar = null;
}
};
/**
* Removes the logo.
*
* @return {undefined}
* @private
*/
rune.data.Loader.prototype.m_disposeLogo = function() {
if (this.m_logo != null) {
this.m_logo['parent'].removeChild(this.m_logo, true);
this.m_logo = null;
}
};
/**
* Fade in.
*
* @return {undefined}
* @private
*/
rune.data.Loader.prototype.m_fadeIn = function() {
if (this.m_camera instanceof rune.camera.Camera) {
this.m_camera['fade'].in(
rune.data.Loader.FADE_DURATION,
this.m_onFadeInComplete,
this
);
}
this.m_sound.play();
};
/**
* Called when the camera fade-in effect is completed.
*
* @return {undefined}
* @private
*/
rune.data.Loader.prototype.m_onFadeInComplete = function() {
this.m_loadResources();
this['timers'].create({
duration: rune.data.Loader.DELAY_DURATION,
scope: this,
onComplete: function() {
if (++this.m_numStepCompleted === 2) {
this.m_fadeOut();
}
}
});
};
/**
* Loads application resources to the resource library.
*
* @return {undefined}
* @private
*/
rune.data.Loader.prototype.m_loadResources = function() {
var Batch = this.m_options.resources || rune.resource.Requests;
this['application']['resources'].request({
batch: new Batch(),
onComplete: this.m_onLoadComplete,
onProgress: this.m_onResourcesProgress,
scope: this
});
};
/**
* Called on two occasions: 1. When all resources have been loaded. 2. When
* the delay time has expired.
*
* @returns {undefined}
* @private
*/
rune.data.Loader.prototype.m_onLoadComplete = function() {
if (++this.m_numStepCompleted === 2) {
this.m_fadeOut();
}
};
/**
* Called when a requested resource has been successfully loaded by the
* application.
*
* @param {number} progress Indicates the progress of the loading process.
* @param {string} name The name of the loaded resource.
* @param {number} size The size of the loaded resource (in bytes).
* @param {string} type The loaded resource MIME type.
* @param {Object} resource The loaded resource (in encoded format).
*
* @return {undefined}
* @private
*/
rune.data.Loader.prototype.m_onResourcesProgress = function(progress, name, size, type, resource) {
if (this.m_progressbar != null) {
this.m_progressbar.progress = progress;
}
};
/**
* Fade out.
*
* @return {undefined}
* @private
*/
rune.data.Loader.prototype.m_fadeOut = function() {
if (this.m_camera instanceof rune.camera.Camera) {
this.m_camera['fade'].out(
rune.data.Loader.FADE_DURATION,
this.m_onFadeOutComplete,
this
);
if (this.m_progressbar != null) {
this.m_progressbar.progress = 1.0;
}
}
};
/**
* Called when the camera fade-out effect is completed.
*
* @return {undefined}
* @private
*/
rune.data.Loader.prototype.m_onFadeOutComplete = function() {
var scenes = (this.m_options.scene != null) ? [new this.m_options.scene()] : [new rune.scene.Scene()];
this['application']['scenes'].load(scenes);
};</code></pre>
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