/****************************************************************
 * Doubleclick simulator in JavaScript. 
 *	 
 * DynImage991221
 * by Christiaan Hofman, December 1999
 *	 
 * You may use or modify this code provided that this copyright notice
 * appears on all copies.
 *	 
 *	 
 *	Constructor:
 *		doubleclick = new DoubleClick( onDoubleClick [, onSingleClick, onSelect, onUnSelect, itemvar] );
 *		doubleclick = new DoubleClick( doubleclick2 );
 *	
 *	Methods:
 *		doubleclick.onClick( [i] );
 *		doubleclick.select( [i] );
 *		doubleclick.unselect();
 *	 
 *	Default Initial Settings:	 
 *		doubleclick.waitTime = 300;
 *		doubleclick.clicked = null;
 *		doubleclick.selected = null;
 ****************************************************************
 */
function onClick(i) {
	if ( i == undefined )	i = true;
	if ( this.clicked == i ) {
		this.onDoubleClick(i)
		this.clicked = null;
		this.selected = i;
	} 
	else {
		if (this.selected != null && this.selected != i)	this.onUnselect();
		this.onSelect(i);
		this.clicked = i;
		if ( typeof(i) == "string" )	i = "'"+i+"'";
		setTimeout("with ("+ this.theDoubleClick +") { if (clicked=="+i+") { onSingleClick("+i+"); clicked = null; selected = "+i+" } }", this.waitTime);
	}
}

function DoubleClick( onDoubleClick, onSingleClick, onSelect, onUnselect, itemvar ) {
	this.type = 'DoubleClick';
	this.clicked = null;
	this.selected	= null;
	this.onClick = onClick;
	if (onDoubleClick.type == 'DoubleClick') {
		var proto = onDoubleClick;		
		this.waitTime = proto.waitTime;
		this.onDoubleClick = proto.onDoubleClick;
		this.onSelect = proto.onSelect;
		this.onUnSelect = proto.onUnselect;
		this.onSingleClick = proto.onSingleClick;
		this.select = proto.select;
		this.unselect = proto.unselect;
	}
	else {
		itemvar = itemvar || 'i';
		this.waitTime = 300;
		this.onDoubleClick = new Function( itemvar, onDoubleClick );
		this.onSelect = ( onSelect )?	new Function( itemvar, onSelect ) : new Function( 'void(0)' );
		this.onUnselect = ( onUnselect )?	new Function( 'var '+itemvar+'=this.selected;'+ onUnselect ) : new Function( 'void(0)' );
		this.onSingleClick = ( onSingleClick )?	new Function( itemvar, onSingleClick ) : new Function( 'void(0)' );
		this.select = new Function( itemvar, (( onUnselect )?	'if (this.selected!=null){this.onUnselect()}' : '' ) +'if ('+itemvar+'==undefined) '+itemvar+'=true;' + (onSelect || '') + ';this.selected='+itemvar );
		this.unselect = new Function( 'if (this.selected!=null) {var '+itemvar+'=this.selected;' + (onUnselect || '') + ';this.selected=null}' );
 }
	if ( !window.doubleclicks )	window.doubleclicks = new Array();
	this.theDoubleClick = "doubleclicks["+ window.doubleclicks.length +"]";
	window.doubleclicks[ window.doubleclicks.length ] = this;
}