ExtJs 4 is not a framework ... is a never-ending battle!

I won a battle:

Code:
Ext.onReady(function() {
...
Ext.application({
...
launch: function() {
...
Ext.getDoc().on('contextmenu', function(e,t,eOpts)  { 
    if (e.preventDefault) {
        e.preventDefault();
    } else {
        e.returnValue = false;
    }
    return false;
});
This solution stop right click events on document browser but leave it for ExtJs ones.

I can right-click on TreeMenuItems, panel desktop and so on.

ciao!