(function($) {
$.fn.chained = function(parent_selector, options) {
return this.each(function() {
/* Save this to self because this changes when scope changes. */
var self = this;
var backup = $(self).clone();
/* Handles maximum two parents now. */
$(parent_selector).each(function() {
$(this).bind("change", function() {
$(self).html(backup.html());
var selected = "";
selected = selected.substr(1);
/* Also check for first parent without subclassing. */
/* TODO: This should be dynamic and check for each parent */
/* without subclassing. */
var first = $(parent_selector).first();
var selected_first = $(":selected", first).val();
$("option", self).each(function() {
/* Remove unneeded items but save the default value. */
if (!$(this).hasClass(selected) &&
!$(this).hasClass(selected_first) && $(this).val() !== "") {
$(this).remove();
}
});
/* If we have only the default value disable select. */
if (1 == $("option", self).size() && $(self).val() === "") {
$(self).attr("disabled", "disabled");
} else {
$(self).removeAttr("disabled");
}
$(self).trigger("change");
});
/* Force IE to see something selected on first page load. */
$("option", this).first().attr("selected", "selected");
/* Force updating the children. */
$(this).trigger("change");
});
});
};
/* Alias for those who like to use more English like syntax. */
$.fn.chainedTo = $.fn.chained;
})(jQuery); |
