Fire the selectall event when select all element is clicked.

chosen/chosen.css

@@ -387,3 +387,7 @@
   direction: rtl;
 }
 /* @end */
+
+/* @group Select all options */
+.chzn-select-all { background: #f8f8f8; border-top: 1px solid #ededed; color: #346f9b; cursor:pointer; display: block; font-size: 12px; font-weight: bold; padding: 5px 6px; text-align: center; text-decoration: none; }
+/* @end */

chosen/chosen.jquery.js

@@ -106,8 +106,6 @@ Copyright (c) 2011 by Harvest
       this.form_field = form_field;
       this.options = options != null ? options : {};
       this.set_default_values();
-      this.is_multiple = this.form_field.multiple;
-      this.default_text_default = this.is_multiple ? "Select Some Options" : "Select an Option";
       this.setup();
       this.set_up_html();
       this.register_observers();
@@ -116,6 +114,8 @@ Copyright (c) 2011 by Harvest
 
     AbstractChosen.prototype.set_default_values = function() {
       var _this = this;
+      this.is_multiple = this.form_field.multiple;
+      this.default_text_default = this.is_multiple ? "Select Some Options" : "Select an Option";
       this.click_test_action = function(evt) {
         return _this.test_active_click(evt);
       };
@@ -129,6 +129,8 @@ Copyright (c) 2011 by Harvest
       this.result_single_selected = null;
       this.allow_single_deselect = (this.options.allow_single_deselect != null) && (this.form_field.options[0] != null) && this.form_field.options[0].text === "" ? this.options.allow_single_deselect : false;
       this.disable_search_threshold = this.options.disable_search_threshold || 0;
+      this.enable_select_all = (this.options.enable_select_all != null) && this.is_multiple ? this.options.enable_select_all : false;
+      console.log(this.enable_select_all);
       this.choices = 0;
       return this.results_none_found = this.options.no_results_text || "No results match";
     };
@@ -204,15 +206,15 @@ Copyright (c) 2011 by Harvest
       switch (stroke) {
         case 8:
           if (this.is_multiple && this.backstroke_length < 1 && this.choices > 0) {
-            return this.keydown_backstroke();
+            this.keydown_backstroke();
           } else if (!this.pending_backstroke) {
             this.result_clear_highlight();
-            return this.results_search();
+            this.results_search();
           }
           break;
         case 13:
           evt.preventDefault();
-          if (this.results_showing) return this.result_select(evt);
+          if (this.results_showing) this.result_select(evt);
           break;
         case 27:
           if (this.results_showing) this.results_hide();
@@ -225,8 +227,9 @@ Copyright (c) 2011 by Harvest
         case 17:
           break;
         default:
-          return this.results_search();
+          this.results_search();
       }
+      if (this.enable_select_all) return this.select_all_toggle();
     };
 
     AbstractChosen.prototype.generate_field_id = function() {
@@ -313,6 +316,7 @@ Copyright (c) 2011 by Harvest
       this.container = $('#' + this.container_id);
       this.container.addClass("chzn-container-" + (this.is_multiple ? "multi" : "single"));
       this.dropdown = this.container.find('div.chzn-drop').first();
+      if (this.enable_select_all) this.select_all_setup();
       dd_top = this.container.height();
       dd_width = this.f_width - get_side_border_padding(this.dropdown);
       this.dropdown.css({
@@ -560,7 +564,8 @@ Copyright (c) 2011 by Harvest
       this.results_showing = true;
       this.search_field.focus();
       this.search_field.val(this.search_field.val());
-      return this.winnow_results();
+      this.winnow_results();
+      if (this.enable_select_all) return this.select_all_toggle();
     };
 
     Chosen.prototype.results_hide = function() {
@@ -574,6 +579,50 @@ Copyright (c) 2011 by Harvest
       return this.results_showing = false;
     };
 
+    Chosen.prototype.select_all_setup = function() {
+      var select_all_temp,
+        _this = this;
+      select_all_temp = $("<a />", {
+        "class": "chzn-select-all"
+      }).html("Select all options");
+      this.dropdown.append(select_all_temp);
+      this.select_all_link = this.dropdown.find(".chzn-select-all").first();
+      return this.select_all_link.click(function(evt) {
+        return _this.select_all_options(evt);
+      });
+    };
+
+    Chosen.prototype.select_all_options = function(evt) {
+      var option, options, _i, _len;
+      evt.preventDefault();
+      options = this.form_field_jq.find("option");
+      for (_i = 0, _len = options.length; _i < _len; _i++) {
+        option = options[_i];
+        if (!option.disabled) option.selected = true;
+      }
+      this.form_field_jq.trigger("liszt:updated");
+      this.form_field_jq.trigger("liszt:selectall");
+      return this.select_all_disable();
+    };
+
+    Chosen.prototype.select_all_disable = function() {
+      return this.select_all_link.hide();
+    };
+
+    Chosen.prototype.select_all_enable = function() {
+      return this.select_all_link.show();
+    };
+
+    Chosen.prototype.select_all_toggle = function() {
+      var actives;
+      actives = this.search_results.find("li.active-result");
+      if (!actives.length || this.search_field.val().length) {
+        return this.select_all_disable();
+      } else {
+        return this.select_all_enable();
+      }
+    };
+
     Chosen.prototype.set_tab_index = function(el) {
       var ti;
       if (this.form_field_jq.attr("tabindex")) {

chosen/chosen.proto.js

@@ -106,8 +106,6 @@ Copyright (c) 2011 by Harvest
       this.form_field = form_field;
       this.options = options != null ? options : {};
       this.set_default_values();
-      this.is_multiple = this.form_field.multiple;
-      this.default_text_default = this.is_multiple ? "Select Some Options" : "Select an Option";
       this.setup();
       this.set_up_html();
       this.register_observers();
@@ -116,6 +114,8 @@ Copyright (c) 2011 by Harvest
 
     AbstractChosen.prototype.set_default_values = function() {
       var _this = this;
+      this.is_multiple = this.form_field.multiple;
+      this.default_text_default = this.is_multiple ? "Select Some Options" : "Select an Option";
       this.click_test_action = function(evt) {
         return _this.test_active_click(evt);
       };
@@ -129,6 +129,8 @@ Copyright (c) 2011 by Harvest
       this.result_single_selected = null;
       this.allow_single_deselect = (this.options.allow_single_deselect != null) && (this.form_field.options[0] != null) && this.form_field.options[0].text === "" ? this.options.allow_single_deselect : false;
       this.disable_search_threshold = this.options.disable_search_threshold || 0;
+      this.enable_select_all = (this.options.enable_select_all != null) && this.is_multiple ? this.options.enable_select_all : false;
+      console.log(this.enable_select_all);
       this.choices = 0;
       return this.results_none_found = this.options.no_results_text || "No results match";
     };
@@ -204,15 +206,15 @@ Copyright (c) 2011 by Harvest
       switch (stroke) {
         case 8:
           if (this.is_multiple && this.backstroke_length < 1 && this.choices > 0) {
-            return this.keydown_backstroke();
+            this.keydown_backstroke();
           } else if (!this.pending_backstroke) {
             this.result_clear_highlight();
-            return this.results_search();
+            this.results_search();
           }
           break;
         case 13:
           evt.preventDefault();
-          if (this.results_showing) return this.result_select(evt);
+          if (this.results_showing) this.result_select(evt);
           break;
         case 27:
           if (this.results_showing) this.results_hide();
@@ -225,8 +227,9 @@ Copyright (c) 2011 by Harvest
         case 17:
           break;
         default:
-          return this.results_search();
+          this.results_search();
       }
+      if (this.enable_select_all) return this.select_all_toggle();
     };
 
     AbstractChosen.prototype.generate_field_id = function() {
@@ -284,7 +287,8 @@ Copyright (c) 2011 by Harvest
       this.single_temp = new Template('<a href="javascript:void(0)" class="chzn-single"><span>#{default}</span><div><b></b></div></a><div class="chzn-drop" style="left:-9000px;"><div class="chzn-search"><input type="text" autocomplete="off" /></div><ul class="chzn-results"></ul></div>');
       this.multi_temp = new Template('<ul class="chzn-choices"><li class="search-field"><input type="text" value="#{default}" class="default" autocomplete="off" style="width:25px;" /></li></ul><div class="chzn-drop" style="left:-9000px;"><ul class="chzn-results"></ul></div>');
       this.choice_temp = new Template('<li class="search-choice" id="#{id}"><span>#{choice}</span><a href="javascript:void(0)" class="search-choice-close" rel="#{position}"></a></li>');
-      return this.no_results_temp = new Template('<li class="no-results">' + this.results_none_found + ' "<span>#{terms}</span>"</li>');
+      this.no_results_temp = new Template('<li class="no-results">' + this.results_none_found + ' "<span>#{terms}</span>"</li>');
+      return this.select_all_temp = new Template('<a href="javascript:void(0)" class="chzn-select-all">#{copy}</a>');
     };
 
     Chosen.prototype.set_up_html = function() {
@@ -308,6 +312,7 @@ Copyright (c) 2011 by Harvest
       this.container = $(this.container_id);
       this.container.addClassName("chzn-container-" + (this.is_multiple ? "multi" : "single"));
       this.dropdown = this.container.down('div.chzn-drop');
+      if (this.enable_select_all) this.select_all_setup();
       dd_top = this.container.getHeight();
       dd_width = this.f_width - get_side_border_padding(this.dropdown);
       this.dropdown.setStyle({
@@ -554,7 +559,8 @@ Copyright (c) 2011 by Harvest
       this.results_showing = true;
       this.search_field.focus();
       this.search_field.value = this.search_field.value;
-      return this.winnow_results();
+      this.winnow_results();
+      if (this.enable_select_all) return this.select_all_toggle();
     };
 
     Chosen.prototype.results_hide = function() {
@@ -568,6 +574,45 @@ Copyright (c) 2011 by Harvest
       return this.results_showing = false;
     };
 
+    Chosen.prototype.select_all_setup = function() {
+      var _this = this;
+      this.dropdown.insert(this.select_all_temp.evaluate({
+        "copy": "Select all options"
+      }));
+      this.select_all_link = this.dropdown.down(".chzn-select-all");
+      return this.select_all_link.observe("click", function(evt) {
+        return _this.select_all_options(evt);
+      });
+    };
+
+    Chosen.prototype.select_all_options = function(evt) {
+      evt.stop();
+      this.form_field.select("option").each(function(option) {
+        if (!option.disabled) return option.selected = true;
+      });
+      this.form_field.fire("liszt:updated");
+      this.form_field.fire("liszt:selectall");
+      return this.select_all_disable();
+    };
+
+    Chosen.prototype.select_all_disable = function() {
+      return this.select_all_link.hide();
+    };
+
+    Chosen.prototype.select_all_enable = function() {
+      return this.select_all_link.show();
+    };
+
+    Chosen.prototype.select_all_toggle = function() {
+      var actives;
+      actives = this.search_results.select("li.active-result");
+      if (!actives.length || this.search_field.value.length) {
+        return this.select_all_disable();
+      } else {
+        return this.select_all_enable();
+      }
+    };
+
     Chosen.prototype.set_tab_index = function(el) {
       var ti;
       if (this.form_field.tabIndex) {

coffee/chosen.jquery.coffee

@@ -47,6 +47,8 @@ class Chosen extends AbstractChosen
     @container.addClass( "chzn-container-" + (if @is_multiple then "multi" else "single") )
     @dropdown = @container.find('div.chzn-drop').first()
     
+    this.select_all_setup() if @enable_select_all
+    
     dd_top = @container.height()
     dd_width = (@f_width - get_side_border_padding(@dropdown))
     
@@ -242,6 +244,7 @@ class Chosen extends AbstractChosen
     @search_field.val @search_field.val()
 
     this.winnow_results()
+    this.select_all_toggle() if @enable_select_all
 
   results_hide: ->
     @selected_item.removeClass "chzn-single-with-drop" unless @is_multiple
@@ -249,6 +252,34 @@ class Chosen extends AbstractChosen
     @dropdown.css {"left":"-9000px"}
     @results_showing = false
 
+  select_all_setup: ->
+    select_all_temp = $("<a />", { class: "chzn-select-all" }).html("Select all options")
+    @dropdown.append(select_all_temp)
+    @select_all_link = @dropdown.find(".chzn-select-all").first()
+    @select_all_link.click((evt) => this.select_all_options(evt))
+
+  select_all_options: (evt) ->
+    evt.preventDefault()
+    
+    options = @form_field_jq.find("option")
+    for option in options
+      option.selected = true if not option.disabled
+    @form_field_jq.trigger("liszt:updated")
+    @form_field_jq.trigger("liszt:selectall")
+    this.select_all_disable()
+
+  select_all_disable: ->
+    @select_all_link.hide()
+
+  select_all_enable: ->
+    @select_all_link.show()
+
+  select_all_toggle: ->
+    actives = @search_results.find("li.active-result")
+    if not actives.length or @search_field.val().length
+      this.select_all_disable()
+    else
+      this.select_all_enable()
 
   set_tab_index: (el) ->
     if @form_field_jq.attr "tabindex"

coffee/chosen.proto.coffee

@@ -20,6 +20,7 @@ class Chosen extends AbstractChosen
     @multi_temp = new Template('<ul class="chzn-choices"><li class="search-field"><input type="text" value="#{default}" class="default" autocomplete="off" style="width:25px;" /></li></ul><div class="chzn-drop" style="left:-9000px;"><ul class="chzn-results"></ul></div>')
     @choice_temp = new Template('<li class="search-choice" id="#{id}"><span>#{choice}</span><a href="javascript:void(0)" class="search-choice-close" rel="#{position}"></a></li>')
     @no_results_temp = new Template('<li class="no-results">' + @results_none_found + ' "<span>#{terms}</span>"</li>')
+    @select_all_temp = new Template('<a href="javascript:void(0)" class="chzn-select-all">#{copy}</a>')
 
   set_up_html: ->
     @container_id = @form_field.identify().replace(/(:|\.)/g, '_') + "_chzn"
@@ -34,11 +35,13 @@ class Chosen extends AbstractChosen
     @default_text = if @form_field.readAttribute 'data-placeholder' then @form_field.readAttribute 'data-placeholder' else @default_text_default
     
     base_template = if @is_multiple then new Element('div', container_props).update( @multi_temp.evaluate({ "default": @default_text}) ) else new Element('div', container_props).update( @single_temp.evaluate({ "default":@default_text }) )
-
+    
     @form_field.hide().insert({ after: base_template })
     @container = $(@container_id)
     @container.addClassName( "chzn-container-" + (if @is_multiple then "multi" else "single") )
     @dropdown = @container.down('div.chzn-drop')
+
+    this.select_all_setup() if @enable_select_all
     
     dd_top = @container.getHeight()
     dd_width = (@f_width - get_side_border_padding(@dropdown))
@@ -233,6 +236,7 @@ class Chosen extends AbstractChosen
     @search_field.value = @search_field.value
 
     this.winnow_results()
+    this.select_all_toggle() if @enable_select_all
 
   results_hide: ->
     @selected_item.removeClassName('chzn-single-with-drop') unless @is_multiple
@@ -240,6 +244,31 @@ class Chosen extends AbstractChosen
     @dropdown.setStyle({"left":"-9000px"})
     @results_showing = false
 
+  select_all_setup: ->
+    @dropdown.insert(@select_all_temp.evaluate({ "copy": "Select all options" }))
+    @select_all_link = @dropdown.down(".chzn-select-all")
+    @select_all_link.observe("click", (evt) => this.select_all_options(evt))
+
+  select_all_options: (evt) ->
+    evt.stop()
+    @form_field.select("option").each (option) ->
+      option.selected = true if not option.disabled
+    @form_field.fire("liszt:updated")
+    @form_field.fire("liszt:selectall")
+    this.select_all_disable()
+  
+  select_all_disable: ->
+    @select_all_link.hide()
+  
+  select_all_enable: ->
+    @select_all_link.show()
+    
+  select_all_toggle: ->
+    actives = @search_results.select("li.active-result")
+    if not actives.length or @search_field.value.length
+      this.select_all_disable()
+    else
+      this.select_all_enable()
 
   set_tab_index: (el) ->
     if @form_field.tabIndex

coffee/lib/abstract-chosen.coffee

@@ -8,9 +8,6 @@ class AbstractChosen
 
   constructor: (@form_field, @options={}) ->
     this.set_default_values()
-    
-    @is_multiple = @form_field.multiple
-    @default_text_default = if @is_multiple then "Select Some Options" else "Select an Option"
 
     this.setup()
 
@@ -20,6 +17,9 @@ class AbstractChosen
     this.finish_setup()
 
   set_default_values: ->
+    @is_multiple = @form_field.multiple
+    @default_text_default = if @is_multiple then "Select Some Options" else "Select an Option"
+    
     @click_test_action = (evt) => this.test_active_click(evt)
     @activate_action = (evt) => this.activate_field(evt)
     @active_field = false
@@ -29,6 +29,8 @@ class AbstractChosen
     @result_single_selected = null
     @allow_single_deselect = if @options.allow_single_deselect? and @form_field.options[0]? and @form_field.options[0].text is "" then @options.allow_single_deselect else false
     @disable_search_threshold = @options.disable_search_threshold || 0
+    @enable_select_all = if @options.enable_select_all? and @is_multiple then @options.enable_select_all else false
+    console.log @enable_select_all
     @choices = 0
     @results_none_found = @options.no_results_text or "No results match"
 
@@ -95,6 +97,8 @@ class AbstractChosen
       when 9, 38, 40, 16, 91, 17
         # don't do anything on these keys
       else this.results_search()
+    
+    this.select_all_toggle() if @enable_select_all
 
   generate_field_id: ->
     new_id = this.generate_random_id()