nicer all/none buttons

app/assets/stylesheets/application.scss.erb

@@ -2323,7 +2323,8 @@ and it won't be important on password protected instances */
     padding: 0;
 
     .setDesc,
-    .selectAll {
+    .selectAll,
+    .selectNone {
         margin-bottom: 5px;
         font-family: 'din-medium', helvetica, sans-serif;
         color: #424242;
@@ -2333,9 +2334,15 @@ and it won't be important on password protected instances */
         display: inline-block;
     }
 
-    .selectAll {
+    .selectAll,
+    .selectNone {
       float: right;
       cursor: pointer;
+
+      &:hover,
+      &.selected {
+        color: #00bcd4;
+      }
     }
 
     & > ul {

app/views/shared/_switchmetacodes.html.erb

@@ -92,7 +92,8 @@
   <% end %>
     <div id="metacodeSwitchTabsCustom">
         <div class="setDesc">Choose Your Metacodes</div>
-        <div class="selectAll">Select all</div> <%# hidden by default %>
+        <div class="selectNone">NONE</div>
+        <div class="selectAll">ALL</div>
         <% @list = '' %>
         <% metacodesInUse = user_metacodes() %> 
         <% Metacode.order("name").all.each_with_index do |m, index| %>

frontend/src/Metamaps/Create.js

@@ -28,7 +28,8 @@ const Create = {
     }).addClass('ui-tabs-vertical ui-helper-clearfix')
     $('#metacodeSwitchTabs .ui-tabs-nav li').removeClass('ui-corner-top').addClass('ui-corner-left')
     $('.customMetacodeList li').click(self.toggleMetacodeSelected) // within the custom metacode set tab
-    $('.selectAll').click(self.metacodeSelectorToggleSelectAll)
+    $('.selectAll').click(self.metacodeSelectorSelectAll)
+    $('.selectNone').click(self.metacodeSelectorSelectNone)
   },
   toggleMetacodeSelected: function() {
     var self = Create
@@ -44,6 +45,33 @@ const Create = {
       self.newSelectedMetacodes.push($(this).attr('id'))
       self.newSelectedMetacodeNames.push($(this).attr('data-name'))
     }
+    self.updateSelectAllColors()
+  },
+  updateSelectAllColors: function() {
+    $('.selectAll, .selectNone').removeClass('selected')
+    if (Create.metacodeSelectorAreAllSelected()) {
+      $('.selectAll').addClass('selected')
+    } else if (Create.metacodeSelectorAreNoneSelected()) {
+      $('.selectNone').addClass('selected')
+    }
+  },
+  metacodeSelectorSelectAll: function() {
+    $('.customMetacodeList li.toggledOff').each(Create.toggleMetacodeSelected)
+    Create.updateSelectAllColors()
+  },
+  metacodeSelectorSelectNone: function() {
+    $('.customMetacodeList li').not('.toggledOff').each(Create.toggleMetacodeSelected)
+    Create.updateSelectAllColors()
+  },
+  metacodeSelectorAreAllSelected: function() {
+    return $('.customMetacodeList li').toArray()
+             .map(li => !$(li).is('.toggledOff')) // note the ! on this line
+             .reduce((curr, prev) => curr && prev)
+  },
+  metacodeSelectorAreNoneSelected: function() {
+    return $('.customMetacodeList li').toArray()
+             .map(li => $(li).is('.toggledOff'))
+             .reduce((curr, prev) => curr && prev)
   },
   metacodeSelectorToggleSelectAll: function() {
     // should be called when Create.isSwitchingSet is true and .customMetacodeList is visible
@@ -51,14 +79,11 @@ const Create = {
     if (!$('.customMetacodeList').is(':visible')) return
 
     // If all are selected, then select none. Otherwise, select all.
-    const anyToggledOff = $('.customMetacodeList li').toArray()
-                          .map(li => $(li).is('.toggledOff'))
-                          .reduce((curr, prev) => curr || prev)
-    if (anyToggledOff) {
-      $('.customMetacodeList li.toggledOff').each(Create.toggleMetacodeSelected)
+    if (Create.metacodeSelectorAreAllSelected()) {
+      Create.metacodeSelectorSelectNone()
     } else {
-      // this should be every single one
-      $('.customMetacodeList li').not('.toggledOff').each(Create.toggleMetacodeSelected)
+      // if some, but not all, are selected, it still runs this function
+      Create.metacodeSelectorSelectAll()
     }
   },
   updateMetacodeSet: function(set, index, custom) {