Extjs - How to show combobox in Grid column

Question

I have a gridpanel include date and combo column jsfiddle

But I don\'t want click to show my combo. I want show my combo without click, not hide inside

Answer 1

var grid = Ext.create('Ext.grid.Panel', {
    store: store,
    columns: [{
        header: 'Category',
        dataIndex: 'CategoryName',
        editor: {
            xtype: 'combobox',
            store: 'categoryStore',
            displayField: 'CategoryName',
            valueField: 'CategoryID'
        }
    }],
    width: 450,
    renderTo: Ext.getElementById('hede')
});