Question

I’m trying to define some default behaviours for my jQuery Dialogs like the following:

(function($) {
        /**
         * Overriding default options
         **/
        $.ui.dialog.defaults.bgiframe = true;
        $.ui.dialog.defaults.open = function() {
            if ($('.ui-widget-overlay').length == 0) return;
            if ($.browser.msie) {
                // scrollbar fix for IE
                $('html').css('overflow-y','hidden');
                $('html').css('overflow-x','hidden');
            } else {
                // disable scrollbar for other browsers
                $('body').css('overflow','hidden');
            }
        };
        $.ui.dialog.defaults.beforeclose = function(event, ui) {
            if ($('.ui-widget-overlay').length == 0) return;
            if ($.browser.msie) {
                // scrollbar fix for IE
                $('html').css('overflow-y','auto');
                $('html').css('overflow-x','auto');
            } else {
                // disable scrollbar for other browsers
                $('body').css('overflow','auto');
            }
        };
})(jQuery);

The above works when I have no custom open/beforeclose function specified when the dialog is created. So I’m wondering what is the best practice to add these functionality into all my dialogs, while preserving the ability to specify open/beforeclose functions.

Answer 1

Okay, I think I figured this out. Following is the least intrusive way of extending jQuery UI functions by attaching the events in _init function.

(function($) {
        /**
         * Overriding default options
         **/
        $.ui.dialog.defaults.bgiframe = true;

        var _init = $.ui.dialog.prototype._init;
        $.ui.dialog.prototype._init = function() {
            _init.apply(this, arguments);
            // only applying these function for modal dialog
            if (this.options.modal) {
                this.uiDialog.bind('dialogopen.ui-dialog', function() {
                    if ($.browser.msie) {
                        // scrollbar fix for IE
                        $('html').css('overflow-y','hidden');
                        $('html').css('overflow-x','hidden');
                    } else {
                        // disable scrollbar for other browsers
                        $('body').css('overflow','hidden');
                    }
                }).bind('dialogbeforeclose.ui-dialog', function() {
                    if ($.browser.msie) {
                        // scrollbar fix for IE
                        $('html').css('overflow-y','auto');
                        $('html').css('overflow-x','auto');
                    } else {
                        // disable scrollbar for other browsers
                        $('body').css('overflow','auto');
                    }
                });
            }
        }
})(jQuery);