animated progress bar to trick the user into thinking that we know what we're doing when actually, we DON'T HAVE ANY CLUE GUYS

assets/javascripts/reporting.js

@@ -62,4 +62,6 @@ Reporting.require("filters");
 Reporting.require("group_bys");
 Reporting.require("restore_query");
 Reporting.require("controls");
+Reporting.require("prototype_progress_bar");
 Reporting.require("progressbar");
+

assets/javascripts/reporting/group_bys.js

@@ -136,6 +136,14 @@ Reporting.GroupBys = {
     add_groups_select_box.insert({ before: group_by });
     Reporting.GroupBys.adding_group_by_enabled(field, false);
     Reporting.GroupBys.recreate_sortables();
+  },
+
+  clear: function() {
+    Reporting.GroupBys.group_by_container_ids().each(function (container) {
+      $(container).select('[data-group-by]').each(function (group_by) {
+        Reporting.GroupBys.remove_group_by(group_by);
+      });
+    });
   }
 };
 

assets/javascripts/reporting/progressbar.js

@@ -3,11 +3,28 @@
 
 Reporting.Progress = {
 
+  replace_with_bar: function (element) {
+    var parent = $('progressbar');
+    var size = parseInt(element.getAttribute('data-size'), 10) || 500;
+    parent.descendants().each(function (elem) {
+      elem.remove();
+    });
+    parent.appendChild(new Element('div', {
+      'id': 'progressbar_container',
+      'class': 'progressbar_container'
+    }));
+    new Control.ProgressBar('progressbar_container', {
+      // Speed determined through laborous experimentation!
+      interval: (size * (Math.log(size)^3)) / 80000
+    }).start();
+  },
+
   attach_listeners: function () {
     if ($('progressbar') !== null && $('progressbar') !== undefined) {
       $('progressbar').select('span[data-load]').each(function (element) {
         element.observe("click", function (e) {
           if (this.getAttribute("data-load") === "true") {
+            Reporting.Progress.replace_with_bar(this);
             Reporting.Controls.send_settings_data(this.getAttribute("data-target"), Reporting.Controls.update_result_table);
           } else {
             $('progressbar').toggle();

assets/javascripts/reporting/prototype_progress_bar.js

@@ -0,0 +1,102 @@
+/**
+ * @author Ryan Johnson <http://syntacticx.com/>
+ * @copyright 2008 PersonalGrid Corporation <http://personalgrid.com/>
+ * @package LivePipe UI
+ * @license MIT
+ * @url http://livepipe.net/control/progressbar
+ * @require prototype.js, livepipe.js
+ */
+
+/*global document, Prototype, Ajax, Class, PeriodicalExecuter, $, $A, Control */
+
+if(typeof(Prototype) == "undefined") {
+    throw "Control.ProgressBar requires Prototype to be loaded."; }
+if(typeof(Event) == "undefined") {
+    throw "Control.ProgressBar requires Event to be loaded."; }
+
+Control.ProgressBar = Class.create({
+    initialize: function(container,options){
+        this.progress = 0;
+        this.executer = false;
+        this.active = false;
+        this.poller = false;
+        this.container = $(container);
+        this.containerWidth = this.container.getDimensions().width - (parseInt(this.container.getStyle('border-right-width').replace(/px/,''), 10) + parseInt(this.container.getStyle('border-left-width').replace(/px/,''), 10));
+        this.progressContainer = $(document.createElement('div'));
+        this.progressContainer.setStyle({
+            width: this.containerWidth + 'px',
+            height: '100%',
+            position: 'absolute',
+            top: '0px',
+            right: '0px'
+        });
+        this.container.appendChild(this.progressContainer);
+        this.options = {
+            afterChange: Prototype.emptyFunction,
+            interval: 0.25,
+            step: 1,
+            classNames: {
+                active: 'progress_bar_active',
+                inactive: 'progress_bar_inactive'
+            }
+        };
+        Object.extend(this.options,options || {});
+        this.container.addClassName(this.options.classNames.inactive);
+        this.active = false;
+    },
+    setProgress: function(value){
+        this.progress = value;
+        this.draw();
+        if(this.progress >= 100) {
+            this.stop(false); }
+        this.notify('afterChange',this.progress,this.active);
+    },
+    poll: function (url, interval, ajaxOptions){
+        // Extend the passed ajax options and success callback with our own.
+        ajaxOptions = ajaxOptions || {};
+        var success = ajaxOptions.onSuccess || Prototype.emptyFunction;
+        ajaxOptions.onSuccess = success.wrap(function (callOriginal, request) {
+            this.setProgress(parseInt(request.responseText, 10));
+            if(!this.active) { this.poller.stop(); }
+            callOriginal(request);
+        }).bind(this);
+
+        this.active = true;
+        this.poller = new PeriodicalExecuter(function(){
+            var a = new Ajax.Request(url, ajaxOptions);
+        }.bind(this),interval || 3);
+    },
+    start: function(){
+        this.active = true;
+        this.container.removeClassName(this.options.classNames.inactive);
+        this.container.addClassName(this.options.classNames.active);
+        this.executer = new PeriodicalExecuter(this.step.bind(this,this.options.step),this.options.interval);
+    },
+    stop: function(reset){
+        this.active = false;
+        if(this.executer) {
+            this.executer.stop(); }
+        this.container.removeClassName(this.options.classNames.active);
+        this.container.addClassName(this.options.classNames.inactive);
+        if (typeof reset  === 'undefined' || reset === true) {
+            this.reset(); }
+    },
+    step: function(amount){
+        this.active = true;
+        this.setProgress(Math.min(100,this.progress + amount));
+    },
+    reset: function(){
+        this.active = false;
+        this.setProgress(0);
+    },
+    draw: function(){
+        this.progressContainer.setStyle({
+            width: (this.containerWidth - Math.floor((parseInt(this.progress, 10) / 100) * this.containerWidth)) + 'px'
+        });
+    },
+    notify: function(event_name){
+        if(this.options[event_name]) {
+            return [this.options[event_name].apply(this.options[event_name],$A(arguments).slice(1))]; }
+    }
+});
+Event.extend(Control.ProgressBar);

assets/stylesheets/reporting.css

@@ -480,6 +480,20 @@ div.button_form p * {
   background-color: #ededed;
 }
 
+#progressbar_container {
+    height: 16px;
+    border: 1px solid #ccc;
+    padding: 0;
+    margin: 0;
+    position: relative;
+    background-color: #9A9A9A;
+    background-repeat: repeat-x;
+}
+
+#progressbar_container div {
+    background-color:#fff;
+}
+
 /***** Ajax indicator ******/
 #ajax-indicator {
   font-family: Verdana, sans-serif;

lib/widget/table/progressbar.rb

@@ -20,6 +20,7 @@ class Widget::Table::Progressbar < Widget::Base
               :id => "progressbar-yes",
               :'data-load' => 'true',
               :class => "form_controls",
+              :'data-size' => size,
               :'data-target' => url_for(:action => 'index', :set_filter => '1', :immediately => true) do
                 content_tag :em do
                   ::I18n.t(:label_yes)