Introduce published properties

Author: cletusw

filter-by-text.html

@@ -8,7 +8,7 @@
 
     <div>{{ matchCount }} matches</div>
 
-    <basic-list-box on-core-select="{{ onListBoxSelect }}" class="options">
+    <basic-list-box selectedItem="{{ selectedItem }}" class="options">
       <content></content>
     </basic-list-box>
 

filter-by-text.js

@@ -22,10 +22,8 @@ Polymer('filter-by-text', {
     this.filter(newValue);
   },
 
-  onListBoxSelect: function(event) {
-    if (event.detail.isSelected) {
-      this.dispatchEvent(new CustomEvent('change', { detail: event.detail.item }));
-    }
+  selectedItemChanged: function(oldValue, newValue) {
+    this.dispatchEvent(new CustomEvent('change', { detail: newValue }));
   }
 
 });