/*
tip_balloon.js  v. 1.2

The latest version is available at
http://www.walterzorn.com
or http://www.devira.com
or http://www.walterzorn.de

Initial author: Walter Zorn
Last modified: 13.7.2007

Extension for the tooltip library wz_tooltip.js.
Implements balloon tooltips.
*/

// Here we define new global configuration variable(s) (as members of the
// predefined "config." class).
// From each of these config variables, wz_tooltip.js will automatically derive
// a command which can be passed to Tip() or TagToTip() in order to customize
// tooltips individually. These command names are just the config variable
// name(s) translated to uppercase,
// e.g. from config. Balloon a command BALLOON will automatically be
// created.

//===================  GLOBAL TOOPTIP CONFIGURATION  =========================//
config. Balloon = false				// true or false - set to true if you want this to be the default behaviour
config. BalloonImgPath = "images" // Path to images (border, corners, stem), in quotes. Path must be relative to your HTML file.
// Sizes of balloon images
config. BalloonEdgeSize = 5			// Integer - sidelength of quadratic corner images
config. BalloonStemWidth = 22		// Integer
config. BalloonStemHeight = 40		// Integer
//=======  END OF TOOLTIP CONFIG, DO NOT CHANGE ANYTHING BELOW  ==============//


// Create a new tt_Extension object (make sure that the name of that object,
// here balloon, is unique amongst the extensions available for wz_tooltips.js):
var balloon = new tt_Extension();

// Implement extension eventhandlers on which our extension should react

balloon.OnLoadConfig = function()
{
	if(tt_aV[BALLOON])
	{
		// Turn off native style properties which are not appropriate
		balloon.padding = Math.max(tt_aV[PADDING] - tt_aV[BALLOONEDGESIZE], 0);
		balloon.width = tt_aV[WIDTH];
		//if(tt_bBoxOld)
		//	balloon.width += (balloon.padding << 1);
		tt_aV[BORDERWIDTH] = 0;
		tt_aV[WIDTH] = 0;
		tt_aV[PADDING] = 0;
		tt_aV[BGCOLOR] = "";
		tt_aV[BGIMG] = "";
		tt_aV[SHADOW] = false;
		// Append slash to img path if missing
		if(tt_aV[BALLOONIMGPATH].charAt(tt_aV[BALLOONIMGPATH].length - 1) != '/')
			tt_aV[BALLOONIMGPATH] += "/";
		return true;
	}
	return false;
};
balloon.OnCreateContentString = function()
{
	if(!tt_aV[BALLOON])
		return false;
		
	var aImg, sImgZ, sCssCrn, sCssImg;

	// Cache balloon images in advance:
	// Either use the pre-cached default images...
	if(tt_aV[BALLOONIMGPATH] == config.BalloonImgPath)
		aImg = balloon.aDefImg;
	// ...or load images from different directory
	else
		aImg = Balloon_CacheImgs(tt_aV[BALLOONIMGPATH]);
	sCssCrn = ' style="position:relative;width:' + tt_aV[BALLOONEDGESIZE] + 'px;padding:0px;margin:0px;overflow:hidden;line-height:0px;"';
	sCssImg = 'padding:0px;margin:20px 0px 0px 0px;border:0px;';
	sImgZ = '" style="' + sCssImg + '" />';
	
	tt_sContent = '<div	 class="tooltip ietooltip">'				
				+ '<div style="position:relative;z-index:0;overflow:hidden;">'			
				+ '' + tt_sContent + ''
				+ '</div>'			
				+ '</div>'
				+ '<span style="float:left;display:block;width:245px;height:17px;background-image:url(' + aImg[1].src + ');_background:transparent;filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop src='+ aImg[1].src + ')" class="ietooltiphide">&nbsp;</span>';
	return true;
};

function Balloon_CacheImgs(sPath)
{
	var asImg = ["fileshare", "fileshare"],
	n = asImg.length,
	aImg = new Array(n),
	img;

	while(n)
	{--n;
		img = aImg[n] = new Image();
		img.src = sPath + asImg[n] + ".png";
	}
	return aImg;
}
// This mechanism pre-caches the default images specified by
// congif.BalloonImgPath, so, whenever a balloon tip using these default images
// is created, no further server connection is necessary.
function Balloon_PreCacheDefImgs()
{
	// Append slash to img path if missing
	if(config.BalloonImgPath.charAt(config.BalloonImgPath.length - 1) != '/')
		config.BalloonImgPath += "/";
	// Preload default images into array
	balloon.aDefImg = Balloon_CacheImgs(config.BalloonImgPath);
}
Balloon_PreCacheDefImgs();