TheRealPapa TheRealPapa - 6 months ago 31
Javascript Question

Jquery ui Autocomplete Combobox - changed not firing

I need help with JQuery UI Autocomplete Combobox. I cannot get the "CHANGED" event to fire no matter what. I have pulled together this widget from various examples.

I have a JSFiddle here for the current working example. I want it to "ALERT" me with the select ID that was changed (I have 4 of these widgets on one page on the site I am building).

I get no JS errors from the example, so what am I doing wrong? Thanks in advance

(function ($) {
$.widget("custom.combobox", {

_create: function () {
this.wrapper = $("<span>")
.addClass("custom-combobox")
.insertAfter(this.element);
this.element.hide();
this._createAutocomplete();
this._createShowAllButton();
},

_createAutocomplete: function () {
var selected = this.element.children(":selected"),
value = selected.val() ? selected.text() : "";

this.input = $("<input>")
.appendTo(this.wrapper)
.val(value)
.attr("title", "")
.addClass("custom-combobox-input ui-widget ui-widget-content ui-state-default ui-corner-left")
.autocomplete({
delay: 0,
minLength: 0,
source: $.proxy(this, "_source")
})
.tooltip({
tooltipClass: "ui-state-highlight"
})
.on('mouseup', function () {
$(this).select();
});

$(this).blur();

this._on(this.input, {
autocompleteselect: function (event, ui) {
ui.item.option.selected = true;
this._trigger("select", event, {
item: ui.item.option
});
},

autocompletechange: "_removeIfInvalid"
});
},

_createShowAllButton: function () {
var input = this.input,
wasOpen = false;

$("<a>")
.attr("tabIndex", -1)
.attr("title", "Show All Items")
.tooltip()
.appendTo(this.wrapper)
.button({
icons: {
primary: "ui-icon-triangle-1-s"
},
text: false
})
.removeClass("ui-corner-all")
.addClass("custom-combobox-toggle ui-corner-right")
.mousedown(function () {
wasOpen = input.autocomplete("widget").is(":visible");
})
.click(function () {
input.focus();
input.blur();

// Close if already visible
if (wasOpen) {
return;
};

// Pass empty string as value to search for, displaying all results
input.autocomplete("search", "");
});
},

_source: function (request, response) {
var matcher = new RegExp($.ui.autocomplete.escapeRegex(request.term), "i");
response(this.element.children("option").map(function () {
var text = $(this).text();
if (this.value && (!request.term || matcher.test(text))) return {
label: text,
value: text,
option: this
};
}));
},

_removeIfInvalid: function (event, ui) {
// Selected an item, nothing to do
if (ui.item) {

var selected = this.element;
return;
};

// Search for a match (case-insensitive)
var default_text = "";

var value = this.input.val(),
valueLowerCase = value.toLowerCase(),
valid = false;

this.element.children("option").each(function () {

if ($(this).val() == "default") {
default_text = $(this).text();
};

if ($(this).text().toLowerCase() === valueLowerCase) {
this.selected = valid = true;
return false;
};
});

// Found a match, nothing to do
if (valid) {
return;
};

// Remove invalid value
this.input.val(default_text)
.attr("title", value + " didn't match any item")
.tooltip("open");

this._delay(function () {
this.input.tooltip("close").attr("title", "");
}, 2500);
this.input.data("ui-autocomplete").term = "";
},

_destroy: function () {
this.wrapper.remove();
this.element.show();
},

refresh: function () {
selected = this.element.children(":selected");
this.input.val(selected.text());
},

select: function (event, ui) {
ui.item.option.selected = true;
self._trigger("selected", event, {
item: ui.item.option
});
select.trigger("change");
},

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;
};
};
}
});
})(jQuery);

Answer

simpler way to detect the user has changed the combobox Try this:

$("#combobox").combobox({ 
    select: function (event, ui) { 
        alert(this.value);
    } 
});