showDialog deferreds example

exampleUse.js

$(function () {
    $("#deleteAll").click(function () {
        $.showDialog("You will lose all your data if you continue.")
            .then(function (result) {
                if (result) {
                    $.showDialog("Losing your data is permanent and cannot be restored.  Are you sure?", "Loss is permanent", "Yes", "No")
                        .then(function (result) {
                            if (result) {
                                alert("all data lost!");
                            }
                        });
                }
            });
    });
});

jQuery.showDialog.js

(function ($, undefined) {
    $.showDialog = function (msg, title, okTxt, cancelTxt) {
        title = title || "Warning";
        okTxt = okTxt || "OK";
        cancelTxt = cancelTxt || "Cancel";
        var dfd = $.Deferred(),
            $dialog = $("<div></div>")
                .html(msg)
                .dialog({
                    autoOpen: false,
                    title: title,
                    modal: true,
                    buttons: [
                        {
                            text: okTxt,
                            click: function () {
                                dfd.resolve(true);
                                $(this).dialog("close");
                            }
                        },
                        {
                            text: cancelTxt,
                            click: function () {
                                dfd.resolve(false);
                                $(this).dialog("close");
                            }
                        }
                    ],
                    close: function (event, ui) {
                        if (!dfd.isResolved()) {
                            dfd.reject();
                        }
                    }
                });
        $dialog.dialog("open");
        return dfd;
    };
}(jQuery));

Example of using jQuery deferreds by implementing showDialog similar to the old MessageBox.Show in winforms development.