Extjs 4 checkcolumn not visible

I have a an Grid with a column that must be a checkcolumn, i use this code there are two rows in the grid but the checkcolumn looks empty. When i click on the checkcolumn the console.log returns correctly the changed boolean. But i see nothing in that column.

xtype: 'checkcolumn开发者_运维技巧',
header: 'REDACTEUR',
dataIndex: 'REDACTEUR',
width: 75,
editor: {
xtype: 'checkbox'                            
},
renderer : function(value) {
console.log(value);

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you have to manually include the css for the checkcolumn xtype like this:<link rel="stylesheet" type="text/css" href="/extjs4/examples/ux/css/CheckHeader.css">

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if your app is generated by Sencha CMD, you need to execute the following command on your project directory

sencha app build

after this command has finished, reload your app on your browser and you can now see your checkcolumn.

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extra js file is needed, try to seek Ext file named 'CheckColumn.js' and included it in your script. Or set the Ext's ux path at the beginning of the script also works.

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I solved my disappearing checkbox/radio CSS problem in ExtJs 6.01 by running 2 commands:

1) sencha app build development
2) sencha app refresh

Refresh was important