/**
 * ====================================================
 * JavaScript (preloadImages)
 *
 * @author    : maomao
 * @date      : 2007/06/20
 * @copyright : (c) maomao-studio. All Rights Reserved.
 *     
 * ====================================================
 */

function ImagePreload( p_imagePath, p_aImages, p_pfnPercent, p_pfnFinished ){
	// Call-back routines
	this.m_imagePath = "";
	if (p_imagePath != null){
		this.m_imagePath = p_imagePath;
	}
	this.m_pfnPercent = p_pfnPercent;
	this.m_pfnFinished = p_pfnFinished;

	// Class Member Vars
	this.m_nLoaded = 0;
	this.m_nProcessed = 0;
	this.m_aImages = new Array;
	this.m_nICount = p_aImages.length;

	// Preload Array of Images
	for( var i = 0; i < p_aImages.length; i++ ){
		this.Preload( this.m_imagePath + p_aImages[i] );
	}
}

ImagePreload.prototype.Preload = function( p_oImage ){
	var oImage = new Image;
	this.m_aImages.push( oImage );

	oImage.onload = ImagePreload.prototype.OnLoad;
	oImage.onerror = ImagePreload.prototype.OnError;
	oImage.onabort = ImagePreload.prototype.OnAbort;

	oImage.oImagePreload = this;
	oImage.bLoaded = false;
	oImage.source = p_oImage;
	oImage.src = p_oImage;
}

ImagePreload.prototype.OnComplete = function(){   
	this.m_nProcessed++;
	if ( this.m_nProcessed == this.m_nICount ){
		this.m_pfnFinished();
	} else if (this.m_pfnPercent != null){
		this.m_pfnPercent( Math.round( (this.m_nProcessed / this.m_nICount) * 10 ) );
	}
}

ImagePreload.prototype.OnLoad = function(){
	// 'this' pointer points to oImage Object
	this.bLoaded = true;
	this.oImagePreload.m_nLoaded++;
	this.oImagePreload.OnComplete();
}

ImagePreload.prototype.OnError = function(){
	// 'this' pointer points to oImage Object
	this.bError = true;
	this.oImagePreload.OnComplete();
}

ImagePreload.prototype.OnAbort = function(){
	// 'this' pointer points to oImage Object
	this.bAbort = true;
	this.oImagePreload.OnComplete();
}