I'm using custom cell editing. Here is my code.

colModel: [{ name: 'name', index: 'name',width:'90px',align:”center”,editable:true,classes:”editable”,edittype:'custom',editoptions:{custom_element:mycampaignname, custom_value:mycompaignvalue}},……],

// I'm adding div + textbox + save button when that cell is editable: I don't know other way around so I just did this way.