How to override navigationview back button?

[vtu]

Hi I have a navigation view with a button that pushes a nestedlist. I set the useToolbar config for the nestedlist to false so I wouldn't have two back buttons. When navigating through the list I would like to have it so the navigationview takes into account the view changes that happens. What I'm trying to do is have the navigation view back button go back in the list also. Thanks in advance

[mitchellsimoens]

Extend the navigation view and override the onBackButtonTap method.

[vtu]

thanks went another route.

[totalnotme]

how to do that? Im sorry can not get it.

[totalnotme]

mitchellsimoens please guide some code please can not search for any thread teach about it.

[mitchellsimoens]

Ext.define('Ux.navigation.View', {
    extend : 'Ext.navigation.View',
    xtype  : 'ux-navigationview',

    onButtonTap : function() {
        if (some logic) {
            //optionally you can call the Ext.navigation.View via:
            this.callParent(arguments);
        }
    }
});

[totalnotme]

thank you that work!!

but can I find default logic of navigationbar and nested list toolbar. can i use that class or i have to write all new.