LFC-$8.lzx

<canvas height="40">
   <simplelayout/>
   <button name="eventSender" onmouseover="this.setAttribute('avalue', this.avalue + 10)" onmouseout="this.setAttribute('avalue', this.avalue + 5)">
     <attribute name="avalue" value="0"/>
   </button>

   <view bgcolor="red" width="20" height="20">
     // Handle the implicit `onavalue` event of the `eventSender` button
     <handler name="onavalue" reference="eventSender" args="v">
       this.setAttribute('x' , v);
     </handler>

   </view>
 </canvas>