Problem with a custom EditorGridPanel editor

Question

In a Ext.grid.EditorGridPanel, I need to display my own Ext.menu.Menu when the user wants to edit a certain header. To do this, I defined my own editor which inherits from the Ext.form.TriggerField and on the onTriggerClick, I create a Ext.menu.Menu

Problem: when I click on the menu, the editor is closed so the grid doesn't get the value.

I didn't find any tutorials about this :(