// slidingBlackBoard1.0

// --------------------



// imposta variabili di controllo avvenuto caricamento

var slidingBlackboard = 1;



// verifica avvenuto caricamento delle librerie necessarie

// -------------------------------------------------------

if (typeof(checkBrowser)=="undefined") alert("Attenzione!\n--------------\n La libreria \"slidingBlackboard\" necessita della libreria \"checkBrowser\".");

if (typeof(gestioneLivelli)=="undefined") alert("Attenzione!\n--------------\n La libreria \"slidingBlackboard\" necessita della libreria \"gestioneLivelli\".");



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// Lavagna a scorrimento orizzontale (inizio Codice)

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function buildBlackboard(bbName, xCoord, yCoord, bbWidth, bbHeight, bbText, bbBorderColor, bbBgColor, bbDelay)

{

	// -----------------------

	// Costruisce la "lavagna"

	// -----------------------

	// bbName --> nome della lavagna

	// xCoord --> Coordinata X della lavagna

	// yCoord --> Coordinata Y della lavagna

	// bbWidth --> Larghezza della lavagna

	// bbHeight --> Altezza della lavagna

	// bbBorderColor (opzionale) --> colore bordo

	// bbBgColor (opzionale) --> colore sfondo

	// bbText --> testo da inserire nella lavagna

	var bbCode = new String();

	var marginWidth // <-- Distanza dai bordi sinistro e destro della tabella

	var marginHeght // <-- Distanza dai bordi inferiore e superiore della tabella



	if (bbBorderColor=="") bbBorderColor = "#000000";

	if (bbBgColor=="") bbBgColor = "#FFFFFF";

	if (bbDelay=="") bbDelay="55";

	marginWidth = 5;

	marginHeight = 5;



	var	theClientBrowser = clientBrowser(); // <-- funzione istanziata in "checkBrowser.js"

	var lay; // <-- Variabile interna. Contiene oggetto layer da "scrollare";

	var layHeight // <-- Variabile interna. Contiene altezza layer da "scrollare";

	var tim;



	if (theClientBrowser=="netscape4.x") {bbCode += "<LAYER ID=\""+bbName+"(border)\" LEFT=\""+xCoord+"\" TOP=\""+yCoord+"\" WIDTH=\""+bbWidth+"\" HEIGHT=\""+bbHeight+"\"> \n"; }

	else {bbCode += "<DIV ID=\""+bbName+"(border)\" STYLE=\"position:absolute; left:"+xCoord+"; top:"+yCoord+"; width:"+bbWidth+"; height:"+bbHeight+";\"> \n"; };

	bbCode += "<TABLE BORDER=\"0\" CELLSPACING=\"0\" CELLPADDING=\"0\" WIDTH=\""+bbWidth+"\" HEIGHT=\""+bbHeight+"\" BGCOLOR=\""+bbBorderColor+"\"> \n";

	bbCode += "<TR> \n";

	bbCode += "	<TD ALIGN=\"center\" VALIGN=\"middle\"> \n";

	bbCode += "	<TABLE BORDER=\"0\" CELLSPACING=\"0\" CELLPADDING=\"0\" WIDTH=\""+(bbWidth-2)+"\" HEIGHT=\""+(bbHeight-2)+"\" BGCOLOR=\""+bbBgColor+"\"> \n";

	bbCode += "	<TR> \n";

	bbCode += "		<TD>&nbsp; \n";

	if (theClientBrowser=="netscape4.x") {bbCode += "		<LAYER ID=\""+bbName+"(clip)\" LEFT=\""+marginWidth+"\" TOP=\""+marginHeight+"\" WIDTH=\""+(bbWidth-marginWidth-marginWidth)+"\" HEIGHT=\""+(bbHeight-marginHeight-marginHeight)+"\" CLIP=\"0,0,"+(bbWidth-marginWidth-marginWidth)+","+(bbHeight-marginHeight-marginHeight)+"\"> \n"; }

	else {bbCode += "		<DIV ID=\""+bbName+"(clip)\" STYLE=\"position:absolute;left:"+marginWidth+";top:"+marginHeight+";width:"+(bbWidth-marginWidth-marginWidth)+";height:"+(bbHeight-marginHeight-marginHeight)+"; overflow:hidden;\"> \n"; };

	if (theClientBrowser=="netscape4.x") {bbCode += "		<LAYER ID=\""+bbName+"\" LEFT=\"0\" TOP=\"0\" WIDTH=\""+(bbWidth-marginWidth-marginWidth)+"\" > \n"; }

	else {bbCode += "		<DIV ID=\""+bbName+"\" STYLE=\"position:absolute;left:0;top:0;width:"+(bbWidth-marginWidth-marginWidth)+";\"> \n"; };

	// inserisce il contenuto nella lavagna

	bbCode += bbText +"\n";

	// -------------------------------------

	if (theClientBrowser=="netscape4.x") {bbCode += "		</LAYER> \n"; }

	else {bbCode += "		</DIV> \n"; };

	if (theClientBrowser=="netscape4.x") {bbCode += "		</LAYER> \n"; }

	else {bbCode += "		</DIV> \n"; };

	bbCode += "		</TD> \n";

	bbCode += "	</TR> \n";

	bbCode += "	</TABLE> \n";

	bbCode += " </TD> \n";

	bbCode += "</TR> \n";

	bbCode += "</TABLE> \n";

	if (theClientBrowser=="netscape4.x") {bbCode += "</LAYER> \n";}

	else {bbCode += "</DIV> \n"; };

	document.write(bbCode);

	if (theClientBrowser=="netscape4.x") {lay = document.layers[bbName+"(border)"].layers[bbName+"(clip)"].layers[bbName]}

	else {lay = document.getElementById(bbName) };

	moveLayBy(lay, 0, (bbHeight+10));

	layHeight = getLayHeight(lay); // <-- funzione istanziata in "gestioneLivelli.js"

	scrollLay(bbName, layHeight, bbHeight, parseInt(bbDelay));

};



function scrollLay(layId, layHeight, blackboardHeight, delay)

{

	// -------------------------

	// "scrolla" l'oggetto layer

	// ricevuto come parametro;

	// -------------------------

	var lay;

	var layTop;

	var theClientBrowser = clientBrowser();

	if (theClientBrowser=="netscape4.x")

	{

		lay = document.layers[layId+"(border)"].layers[layId+"(clip)"].layers[layId];

	}

	else

	{

		lay = document.getElementById(layId);

	};

	layTop = getLayTop(lay); // <-- funzione istanziata in "gestioneLivelli.js"

	if ((layHeight+layTop)<0) { moveLayBy(lay, 0, (layHeight+blackboardHeight+10));}

	moveLayBy(lay, 0, -1); // <-- funzione istanziata in "gestioneLivelli.js"

	tim2 = setTimeout("scrollLay('"+layId+"',"+layHeight+","+blackboardHeight+", "+delay+")", delay);

};





function moveBuildBlackboardTo(bbName, xCoord, yCoord)

{

	// ------------------------------------------

	// Sposta la lavagna alle coordinate indicate

	// ------------------------------------------

	bbName += "(border)";

	if (clientBrowser()=="netscape4.x")

	{

		lay = document.layers[bbName];

	}

	else

	{

		lay = document.getElementById(bbName);

	};

	moveLayTo(lay, xCoord, yCoord);

}



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