Grid header menu

[apple-geek]

Hello !
I have create a checkbox in grid header menu.
My problem is when I check it in one column, it is automatically checked in other columns.
So how can I make them independent?
Here is my code:
grid.on('viewready', function(){
view=grid.getView();

grid.getView().hmenu.add( new Ext.menu.CheckItem({
text:'test'

})});

Thank you for your helps.

[icfantv]

I don't think this is a GXT 3 question. You should probably ask it in the correct forum.