IT:AD:JScript:Libs:JQuery:UI:AutoComplete:ComboBox
Combobox
$.widget(
"ui.combobox",
{
//options are the arguments
//set by invoking widget, passing it a map
//that merges in values.
//eg: $("#mySelect").combobox({url="..."});
options: {
url: "",
httpMethod: "GET",
datatype: "json",
maxVisibleItems: 8,
buttonTitle: "Show Options",
moreText: "More: refine search...",
showValueAsTitle: false
},
_create: function () {
var input,
self = this,
//hide the combo, as we'll be showing
//a text input instead:
select = this.element.hide(),
//Get the selected item at load time.
selected = select.children(":selected"),
//Get it's value if you can:
value = selected.val() ? selected.text() : "",
wrapper = this.wrapper = $("<span>")
.addClass("ui-combobox")
.insertAfter(select);
var x = select.data('url');
if (typeof (x) != "undefined") {
self.options.url = x;
if (!self.options.url) {
self.options.url = "['url' not set.]";
}
}
x = select.data('dataType')
if (typeof (x) != "undefined") {
self.options.dataType = x;
if (!self.options.dataType) {
self.options.dataType = 'json';
}
}
x = select.data('httpMethod');
if (typeof (x) != "undefined") {
self.options.httpMethod = x;
if (!self.options.httpMethod) {
self.options.httpMethod = 'GET';
}
}
x = select.data('maxVisibleItems');
if (typeof (x) != "undefined") {
self.options.maxVisibleItems = parseInt(x);
if (self.options.maxVisibleItems == NaN || self.options.maxVisibleItems < 5) {
self.options.maxVisibleItems = 5;
}
}
x = select.data('buttonText');
if (typeof (x) != "undefined") {
self.options.buttonText = x;
if (!self.options.buttonText) {
self.options.buttonText = 'Show Options';
}
}
x = select.data('moreText');
if (typeof (x) != "undefined") {
self.options.moreText = x;
if (!self.options.moreText) {
self.options.moreText = 'More: refine search...';
}
}
x = select.data('showValueAsTitle');
if (typeof (x) != "undefined") {
self.options.showValueAsTitle = (x == "true");
}
//Create an text input
input = $("<input>")
.appendTo(wrapper)
.val(value)
.addClass("ui-state-default ui-combobox-input")
//make it autocomplete
.autocomplete({
delay: 0,
minLength: 0,
//define it's source:
source: function (request, response) {
$.ajax({
url: self.options.url,
dataType: self.options.datatype,
data: {
//what we are sending off:
searchTerm: request.term
},
type: self.options.httpMethod,
success: function (data) {
//a bit wasteful, but
//clear out the previous queries
select.empty();
$.each(data, function (key, val) {
//If it comes back as an array rather than a dictionary:
if (typeof (val) == "object") {
key = val.key;
val = val.val;
}
select.append($("<option/>")
.attr("value", key)
.text(val));
});
//Now that we have a new set of options
//we use that as the local datastore to
//search through.
//define a regex filter to find the input within the select options
var matcher = new RegExp($.ui.autocomplete.escapeRegex(request.term), "i");
//for each select option, get the text(not value),
//test it,
//and if matched
//return response
var o = select.children("option").map(function () {
var text = $(this).text();
if (this.value && (!request.term || matcher.test(text)))
return {
//Mke bold characters
label: text.replace(
new RegExp(
"(?![^&;]+;)(?!<[^<>]*)(" +
$.ui.autocomplete.escapeRegex(request.term) +
")(?![^<>]*>)(?![^&;]+;)", "gi"
), "<strong>$1</strong>"),
value: text,
option: this
};
})
//If there are too many items, truncate them or else
//unwieldy.
if (o.length > self.options.maxVisibleItems) {
o = o.slice(0, self.options.maxVisibleItems - 1);
//no way of marking the option as disabled.
//And note that we are making objects, not li's or options:
o.push({ label: self.options.moreText, value: "", option: null });
}
response(o);
}
});
},
select: function (event, ui) {
if (!ui.item.option) {
//if we are the last one (ie our 'more' text)
//it has no option, so clear and get out.
$(this).val("");
select.val("");
input.data("autocomplete").term = "";
} else {
//otherwise set it:
ui.item.option.selected =true;
self._trigger("selected", event, {
item: ui.item.option
});
}
},
change: function (event, ui) {
if (!ui.item) {
var matcher = new RegExp("^" + $.ui.autocomplete.escapeRegex($(this).val()) + "$", "i"),
valid = false;
select.children("option").each(function () {
if ($(this).text().match(matcher)) {
this.selected = valid = true;
return false;
}
});
if (!valid) {
// remove invalid value, as it didn't match anything
$(this).val("");
select.val("");
input.data("autocomplete").term = "";
return false;
}
}
}
})//input
.addClass("ui-widget ui-widget-content ui-corner-left")
//hack to remove image that gives illusion of gray background
.css('background', "white");
//render the drop down items
input.data("autocomplete")._renderItem = function (ul, item) {
var $item = $("<a></a>")
.html(item.label);
if ((self.options.showValueAsTitle) && (item.option)) {
$item.attr("title", item.option.value);
}
return $("<li></li>")
.data("item.autocomplete", item)
.append($item)
.appendTo(ul);
};
//Make a link button for the drop down button
//and append to end of wrapper (ie to right of input
$("<a>")
.attr("tabIndex", -1)
.attr("title", self.options.buttonTitle)
.appendTo(wrapper)
.button({
icons: {
primary: "ui-icon-triangle-1-s"
},
text: false
})
.removeClass("ui-corner-all")
.addClass("ui-corner-right ui-combobox-toggle")
//give a click handler that will show all current
//items without causing a fetch
.click(function () {
// close if already visible
if (input.autocomplete("widget").is(":visible")) {
input.autocomplete("close");
return;
}
// work around a bug (likely same cause as #5265)
$(this).blur();
// pass empty string as value to search for, displaying all results
input.autocomplete("search", "");
input.focus();
});
},
destroy: function () {
this.wrapper.remove();
this.element.show();
$.Widget.prototype.destroy.call(this);
}
});
//Initialize all combos on the page:
$(function () {
$('.combobox').each(function () {
//var url = $(this).data("url");
$(this).combobox();
});
});
In your layout:
<script>
//Initialize all combos on the page:
$(function () {
$('select.combobox').each(function () {
//var url = $(this).data("url");
$(this).combobox();
});
});
</script>
Html:
<callout icon="true" type="class="ui-widget">
<label>Your preferred programming language: </label>
<select id="A" class="combobox" data-url="GetUserNameAndFQN">
<!-- preload data if need be
<option value="">Select one...</option>
<option value="ActionScript">ActionScript</option>
<option value="AppleScript">AppleScript</option>
...
<option value="Scheme">Scheme</option>
-->
</select">
</callout>
I tangled with the AutoComplete one before in an ASP.NET app. It's a bit more complicated as ASP.NET XORs all the values as they go out -- and when you post back a value retrieved via Ajax, containg a value that was not in the XOR, it throws an exception.
>If I remember correctly one has to turn off page validation -- but the answer is somewhere in GTM2's code.