/*  Copyright Mihai Bazon, 2002, 2003  |  http://dynarch.com/mishoo/
 * ---------------------------------------------------------------------------
 *
 * The DHTML Calendar
 *
 * Details and latest version at:
 * http://dynarch.com/mishoo/calendar.epl
 *
 * This script is distributed under the GNU Lesser General Public License.
 * Read the entire license text here: http://www.gnu.org/licenses/lgpl.html
 *
 * This file defines helper functions for setting up the calendar.  They are
 * intended to help non-programmers get a working calendar on their site
 * quickly.  This script should not be seen as part of the calendar.  It just
 * shows you what one can do with the calendar, while in the same time
 * providing a quick and simple method for setting it up.  If you need
 * exhaustive customization of the calendar creation process feel free to
 * modify this code to suit your needs (this is recommended and much better
 * than modifying calendar.js itself).
 */
Calendar.setup=function(params){
	function param_default(pname,def){
		if(typeof params[pname]=="undefined"){
			params[pname]=def;

		}
	};

	param_default("inputField",null);
	param_default("displayArea",null);
	param_default("button",null);
	param_default("eventName","click");
	param_default("ifFormat","%Y/%m/%d");
	param_default("daFormat","%Y/%m/%d");
	param_default("singleClick",true);
	param_default("disableFunc",null);
	param_default("dateStatusFunc",params["disableFunc"]);
	param_default("dateText",null);
	param_default("firstDay",null);
	param_default("align","Br");
	param_default("range",[1900,2999]);
	param_default("weekNumbers",true);
	param_default("flat",null);
	param_default("flatCallback",null);
	param_default("onSelect",null);
	param_default("onClose",null);
	param_default("onUpdate",null);
	param_default("date",null);
	param_default("showsTime",false);
	param_default("timeFormat","24");
	param_default("electric",true);
	param_default("step",2);
	param_default("position",null);
	param_default("cache",false);
	param_default("showOthers",false);
	param_default("multiple",null);
	var tmp=["inputField","displayArea","button"];
	for(var i in tmp){
		if(typeof params[tmp[i]]=="string"){
			params[tmp[i]]=document.getElementById(params[tmp[i]]);
		}
	}
	if(!(params.flat||params.multiple||params.inputField||params.displayArea||params.button)){
		alert("Calendar.setup:\n  Nothing to setup (no fields found).  Please check your code");
		return false;
	}
	function onSelect(cal){
		var p=cal.params;
		var update=(cal.dateClicked||p.electric);
		if(update&&p.inputField){
			p.inputField.value=cal.date.print(p.ifFormat);
			if(typeof p.inputField.onchange=="function")p.inputField.onchange();
	}
	if(update&&p.displayArea)p.displayArea.innerHTML=cal.date.print(p.daFormat);
	if(update&&typeof p.onUpdate=="function")p.onUpdate(cal);
	if(update&&p.flat){
		if(typeof p.flatCallback=="function")p.flatCallback(cal);
	}
	if(update&&p.singleClick&&cal.dateClicked)cal.callCloseHandler();
};

if(params.flat!=null){
	if(typeof params.flat=="string")params.flat=document.getElementById(params.flat);
	if(!params.flat){alert("Calendar.setup:\n  Flat specified but can't find parent.");
	return false;
}

var cal=new Calendar(params.firstDay,params.date,params.onSelect||onSelect);
cal.showsOtherMonths=params.showOthers;
cal.showsTime=params.showsTime;
cal.time24=(params.timeFormat=="24");
cal.params=params;
cal.weekNumbers=params.weekNumbers;
cal.setRange(params.range[0],params.range[1]);
cal.setDateStatusHandler(params.dateStatusFunc);
cal.getDateText=params.dateText;

if(params.ifFormat){
	cal.setDateFormat(params.ifFormat);
}
if(params.inputField&&typeof params.inputField.value=="string"){
	cal.parseDate(params.inputField.value);
}
cal.create(params.flat);
cal.show();

return false;
}

var triggerEl=params.button||params.displayArea||params.inputField;
triggerEl["on"+params.eventName]=function(){
	var dateEl=params.inputField||params.displayArea;
	var dateFmt=params.inputField?params.ifFormat:params.daFormat;
	var mustCreate=false;
	var cal=window.calendar;
	if(dateEl)params.date=Date.parseDate(dateEl.value||dateEl.innerHTML,dateFmt);
	if(!(cal&&params.cache)){
		window.calendar=cal=new Calendar(params.firstDay,params.date,params.onSelect||onSelect,params.onClose||function(cal){cal.hide();});
		cal.showsTime=params.showsTime;
		cal.time24=(params.timeFormat=="24");
		cal.weekNumbers=params.weekNumbers;
		mustCreate=true;
	}else{
		if(params.date)cal.setDate(params.date);
		cal.hide();
	}
	if(params.multiple){cal.multiple={};
	for(var i=params.multiple.length;--i>=0;){
		var d=params.multiple[i];
		var ds=d.print("%Y%m%d");
		cal.multiple[ds]=d;
	}
}
cal.showsOtherMonths=params.showOthers;
cal.yearStep=params.step;
cal.setRange(params.range[0],params.range[1]);
cal.params=params;
cal.setDateStatusHandler(params.dateStatusFunc);
cal.getDateText=params.dateText;
cal.setDateFormat(dateFmt);
if(mustCreate)cal.create();
cal.refresh();
if(!params.position)cal.showAtElement(params.button||params.displayArea||params.inputField,params.align);
	else cal.showAt(params.position[0],params.position[1]);
	return false;
	};
	return cal;
};