Polymer 1.x: Data binding -


i want select states in <google-chart> geo map element shown in jsbin.

when select state, expect change color (to dark teal) instead, stays same color (light grey).

follow these steps recreate problem:

  1. open jsbin.
  2. in section dom-module > <script> > properties > items > value, change array ['alabama', 0] ['alabama', 1].
  3. notice state of alabama changes color light grey dark teal.
  4. hover mouse on state of alabama.
  5. notice value of select variable 1 state of alabama (and 0 other states).
  6. return value of array ['alabama', 0].
  7. note previous step proves code generating geochart behaves expected when items property manually mutated.
  8. here's trouble begins...
  9. click state of alabama.
  10. in console, notice value of items[1] array ['alabama', 1].
  11. notice select value 0 (unlike case when manually changed above).

what problem here?

i'm uncertain but perhaps solution involves implementing advice?

when handling events generated dom-repeat template instance, want map element firing event model data generated item.

but how 1 implement solution in case? or solution?

what solution? please show working in jsbin.

http://jsbin.com/pilotazifa/edit?html,console,output 
<!doctype html>  <head>   <meta charset="utf-8">   <base href="https://polygit.org/components/">   <script src="webcomponentsjs/webcomponents-lite.min.js"></script>   <link href="polymer/polymer.html" rel="import">   <link href="google-chart/google-chart.html" rel="import"> </head>  <body>    <dom-module id="x-element">      <template>       <style>         google-chart {           width: 100%;           max-height: 300px;         }       </style>       <button on-tap="_show">show</button>       <google-chart         id="geochart"         type="geo"         options={{options}}         data={{items}}         on-google-chart-select="_ongooglechartselect"       ></google-chart>     </template>      <script>       (function(){         polymer({           is: 'x-element',           properties: {             items: {               type: array,               notify: true,               reflecttoattribute: true,               value: function() {                 return [['state', 'select'], ['alabama', 0], ['alaska', 0], ['arizona', 0], ['arkansas', 0], ['california', 0], ['colorado', 0], ['connecticut', 0], ['delaware', 0], ['florida', 0], ['georgia', 0], ['hawaii', 0], ['iowa', 0], ['idaho', 0], ['illinois', 0], ['indiana', 0], ['kansas', 0], ['kentucky', 0], ['louisiana', 0], ['massachusetts', 0], ['maryland', 0], ['maine', 0], ['michigan', 0], ['minnesota', 0], ['missouri', 0], ['mississippi', 0], ['montana', 0], ['north carolina', 0], ['north dakota', 0], ['nebraska', 0], ['new hampshire', 0], ['new jersey', 0], ['new mexico', 0], ['nevada', 0], ['new york', 0], ['ohio', 0], ['oklahoma', 0], ['oregon', 0], ['pennsylvania', 0], ['rhode island', 0], ['south carolina', 0], ['south dakota', 0], ['tennessee', 0], ['texas', 0], ['utah', 0], ['virginia', 0], ['vermont', 0], ['washington', 0], ['wisconsin', 0], ['west virginia', 0], ['wyoming', 0]];               }             },             options: {               type: object,               notify: true,               reflecttoattribute: true,               value: function() {                 return {                   region: 'us',                   displaymode: 'regions',                   resolution: 'provinces',                   legend: 'none',                   defaultcolor: '#f5f5f5',                   coloraxis: {                     colors: ['#f5f5f5', '#455a64'],                     minvalue: 0,                       maxvalue: 1,                   }                 }               }             },           },            _ongooglechartselect: function(e) {             var str = e.path[0].textcontent.split('select')[0].trim(),                 ar = this.items,                 = ar.length;             while(i---1){               if(str === ar[i][0]){                 this.set('items.' + + '.1', ar[i][1] ? 0 : 1);               }             }             console.log(this.items);           },           _show: function() {             console.log(this.items);           },         });       })();     </script>    </dom-module>    <x-element></x-element>  </body> </html>

you have add function _ongooglechartselect in end after while. generate data again , draw chart. 

this.$.geochart._datatable=this.$.geochart._createdatatable(this.items); this.$.geochart._chartobject.draw( this.$.geochart._datatable, this.$.geochart.options);

and can use

  this.items[i]= ...

and not 

  //  fire event every time , think in case dont need it.   this.set(...)

because google-chart ask data ajax , data not binding. solution insert data functions draw chart.

http://jsbin.com/doxivotoko/1/edit?html,console,output


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