EXT js grid having one column of radio buttons - extjs

Question

I have an ext js grid like below:
var grid = new Ext.grid.GridPanel({
columns: [
{header: 'Account Id',dataIndex:'accountId' },
{header: 'Account NUmber',dataIndex:'accountNumber' }
]
})
Now I need to show Account Id column as a column of radio buttons. So from the grid user can select one Account Id and submit. When the user reloads the page, that account id should be preselected.
I need some help on how to proceed on this. Do I need to write a renderer on Account Id column? Or is there an easier way.
EDIT: I did like this:
{header: 'Account Id',dataIndex:'accountId',renderer: function(value) {
return "<input type='radio' name = 'primaryRadio' " + (value ? "checked='checked'" : "") + ">";
}},
What is the syntax to add an onclick event or onchange event to the radio group?

Answer 1

Building off the previous answer, yes, I think using a renderer for your column is the correct solution. I think you should go about the click event differently than J. Bruni suggested though. I'd recommend a click listener on your grid panel that checks if you clicked a radio button, and delegates to a method in your GridPanel.
Something like this:
MyRadioGrid = Ext.extend(Ext.grid.GridPanel, {
columns: [
{header: 'Account Id',dataIndex:'accountId', renderer: function(value) {
return "<input type='radio' name = 'primaryRadio' " + (value ? "checked='checked'" : "") + ">";
}},
{header: 'Account NUmber',dataIndex:'accountNumber' }
],
afterRender: function() {
MyRadioGrid.superclass.afterRender.apply(this, arguments);
this.el.on('click', this.checkRadioClick, this);
},
checkRadioClick: function(event) {
if (event.getTarget('input[type="radio"]')) {
//radio clicked... do something
}
}
});

Answer 2

You did well on showing Account Id column as a column of radio buttons, by using a renderer function.
Regarding the onclick event for these, you may simply add the onclick attribute in the HTML tag:
return "<input onclick='my_function()' type='radio' name = 'primaryRadio' " + (value ? "checked='checked'" : "") + ">";