polymer iron-data-table Select row, prevent deselection
Example
Default behavior is to de-select row when clicked twice. In some use cases, you might want to disable this de-selecting behavior.
Note
table.deselectItem(item) method will imperatively deselect an item. This works with both item or index (when using items array) as an argument.
<!DOCTYPE html>
<html>
<head>
<base href="https://polygit.org/polymer+:master/iron-data-table+Saulis+:master/components/">
<link rel="import" href="polymer/polymer.html">
<script src="webcomponentsjs/webcomponents-lite.min.js"></script>
<link rel="import" href="iron-ajax/iron-ajax.html">
<link rel="import" href="paper-button/paper-button.html">
<link rel="import" href="iron-data-table/iron-data-table.html">
<link rel="import" href="iron-data-table/default-styles.html">
</head>
<body>
<x-foo></x-foo>
<dom-module id="x-foo">
<template>
<style>
</style>
[[_computeSelectedStr(selectedItem)]]
<iron-ajax
auto
url="https://saulis.github.io/iron-data-table/demo/users.json"
last-response="{{users}}"
>
</iron-ajax>
<iron-data-table id="grid"
selection-enabled
on-deselecting-item="_deselecting"
items="[[users.results]]"
selected-item="{{selectedItem}}"
>
<data-table-column name="Picture" width="50px" flex="0">
<template>
<img src="[[item.user.picture.thumbnail]]">
</template>
</data-table-column>
<data-table-column name="First Name">
<template>[[item.user.name.first]]</template>
</data-table-column>
<data-table-column name="Last Name">
<template>[[item.user.name.last]]</template>
</data-table-column>
<data-table-column name="Email">
<template>[[item.user.email]]</template>
</data-table-column>
</iron-data-table>
</template>
<script>
(function(){
'use strict';
Polymer({
is: 'x-foo',
observers: [
'_selectedItemChanged(selectedItem)' ,
],
_selectedItemChanged: function(ob) {
console.log('selectedItem', ob);
},
_computeSelectedStr: function(ob) {
return JSON.stringify(ob);
},
_deselecting: function(e) {
e.preventDefault();
}
});
})();
</script>
</dom-module>
</body>
</html>
