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listbuilder.js
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listbuilder.js
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/*
* Namespace
*/
window.app = window.app || {};
/*
* ListBuilder object
*/
window.app.listbuilder = {
/*
* Initialize
*/
initialize : function(config) {
config = config || {};
this.list = config.listElement || $(".listbuilder");
// check for console
if (!window.console) console = { log: function() {} };
this.debugFlag = config.debugFlag || true;
this.debug('init called');
// build list container after identified select list
listcontainer = document.createElement("div");
original = this.list;
$(listcontainer).attr("class","listcontainer");
$(this.list).after(listcontainer);
// build "unselected" and "selected" buckets
unselected = document.createElement("div");
$(unselected).attr("class","unselected bucket");
$(unselected).attr("data-bucket","unselected");
// build filter input
$(unselected).append("<div class='label'><label for='listfilter'>Search:</label><input type='text' name='listfilter' id='listfilter'><a class='reset'>Clear</a></div>");
$(listcontainer).append(unselected);
selected = document.createElement("div");
$(selected).attr("class","selected bucket");
$(selected).attr("data-bucket","selected");
$(selected).append("<div class='label'>Show:</div>");
$(listcontainer).append(selected);
this.populateList();
// append hidden class to original select list, hiding it
$(this.list).addClass("listhidden");
this.debug('init finished');
},
/*
* This is the listener for new interactions with the element
*/
getClick : function(bucket) {
this.debug('click '+bucket.attr('data-value'));
from = bucket.parent().attr('data-bucket');
this.debug('from '+from);
to = from == "unselected" ? "selected" : "unselected";
// Swap
$(listcontainer).children("div[data-bucket='"+to+"']").append(bucket);
this.syncSelect();
this.sortList(selected);
this.sortList(unselected);
},
/*
* This is the listener for the filter input on the unselected bucket
*/
getFilter : function(string) {
// function should be case-insensitive
string = string.toLowerCase();
$(unselected).children(".option").each(function() {
// reset hidden states
$(this).removeClass("hidden");
// function should be case-insensitive
theValue = $(this).attr('data-value').toLowerCase();
if(theValue.indexOf(string) == -1){
$(this).addClass("hidden");
}
});
},
/*
* This reads the contents of the underlying select control and populates the unselected bucket
*/
populateList : function() {
this.debug('syncing...');
// read each item in select list
$(this.list).children("option").each(function(i,e) {
option = document.createElement("div");
$(option).attr("class","option");
$(option).attr("data-value",e.value);
$(option).append(e.text);
if(e.selected==false) {
$(unselected).append(option);
} else {
$(selected).append(option);
}
});
this.debug('sync finished');
},
/*
* This empties the search/filter control
*/
resetFilter : function() {
$("#listfilter").val('');
this.getFilter('');
},
/*
* This function will sort the contents of a supplied list element
* From http://stackoverflow.com/a/304428/2245617
*/
sortList : function(list) {
this.debug('sorting list');
var items = $(list).children('div.option').get();
items.sort(function(a,b) {
var keyA = $(a).text();
var keyB = $(b).text();
if (keyA < keyB) return -1;
if (keyA > keyB) return 1;
return 0;
});
var ul = $(list);
$.each(items, function(i, li) {
ul.append(li);
});
this.debug('list sorted');
},
/*
* This reads the contents of the selected bucket and syncs statuses back to the underlying select control
*/
syncSelect: function() {
this.debug('syncing select');
// wipe existing select states
$(this.list).children("option").prop('selected',false);
// rebuild states based on selected contents
$(selected).children(".option").each(function(i,e) {
// set this option to be selected
$(original).find("option[value='"+$(this).attr("data-value")+"']").prop('selected',true);
//$(this.list).children("option").attr(e.attr('data-value')).prop('selected',true);
});
this.debug('select updated');
},
/*
* Write debug message to console
*/
debug : function(msg) {
if(this.debugFlag) {
console.log(msg);
}
}
};