BuddyPress.org

Hi,

all is explained in the doc !

Changing Internal Configuration Settings

Navigation API

@masoud1111,

You’re talking about 2 different things: profile and groups. Let me explain you a little…

On the buddy nav bar, navigation looks similar but doesn’t work the same way on profile and on group page. While profile navigation use nav and sub-nav, the group navigation use only sub-nav.

Also, as documented on codex, define('BP_DEFAULT_COMPONENT', '...' ); is a constant related to a component, not a sub-nav tab. It let you define the default landing component, but not the one or other sub-nav tab. For example on profiles, the component Activity has 4 sub-nav attached to it: personnal, mentions, favorites, friends, groups

To get one of them, you need to specify a new default tab, not another component. 🙂

Buddybar main nav items on profile page
Activity Profile Friends Groups Forums (if you use group forums)

Default tab is Activity/personnal. To change it for “Friends” you use the constant:
define('BP_DEFAULT_COMPONENT', 'friends' );

To change the default landing tab from (Component/sub-tab). For example Activity/personnal to Activity/mentions, you define a new nav default tab with a function like this one:

function bpex_set_member_default_nav() {
 
    bp_core_new_nav_default (
        array(
            'parent_slug'       => buddypress()->activity->id,
	   // other "activity" sub_nav slugs : personal favorites friends groups
            'subnav_slug'       => 'mentions',
            'screen_function'   => 'bp_activity_screen_mentions'
        )
    );
}
add_action( 'bp_setup_nav', 'bpex_set_member_default_nav', 20 );

For groups, it’s a similar technique, but a different syntax. The following example is a bit sophisticated, as it let you change the landing tab differently for each defined group.
Depending each group activity or target, you can choose a different default tab.
In this example, the kill bill group has Forum as landing tab, while Leon’s group use the group member directory.

function bpex_custom_group_default_tab( $default_tab ){
	/**
	 * class_exists() is recommanded to avoid problems during updates 
	 * or when Groups Component is deactivated
	 */
	if ( class_exists( 'BP_Group_Extension' ) ) : 
	
	$group = groups_get_current_group();//get the current group
	
	if( empty( $group ) ) {
	 return $default_tab;
	}
		switch($group->slug){
			
			case 'kill-bill': // group name (use slug format)
			$default_tab='forum';
			break;
			
			case 'leon':
			$default_tab='members';
			break;
			
			default:		
			$default_tab='home';// the default landing tab
			break;
			
		}
	
	return $default_tab;
	
	endif; // end if ( class_exists( 'BP_Group_Extension' ) )
}
add_filter('bp_groups_default_extension','bpex_custom_group_default_tab');

All this tested and working with BP 2.7.2 / Twenty Sixteen

Hello,
I tried to implement this code but without success.

function bpex_set_member_default_nav() {
 
    bp_core_new_nav_default (
        array(
            'parent_slug'       => buddypress()->activity->id,
	   // other "activity" sub_nav slugs : personal favorites friends groups
            'subnav_slug'       => 'friends',
            'screen_function'   => 'bp_activity_screen_friends'
        )
    );
}
add_action( 'bp_setup_nav', 'bpex_set_member_default_nav', 9 );

My BuddyPress version is 3.0
Have any change?
I activate to the debug and I don’t receive any error