Source View: screen_settings

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: apply_filters( "hook_name", "what_to_filter" ).

Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.

Source View

Line Code
843           global $wp_meta_boxes;
844
845           if ( is_bool( $this->_show_screen_options ) )
846                return $this->_show_screen_options;
847
848           $columns = get_column_headers( $this );
849
850           $show_screen = ! empty( $wp_meta_boxes[ $this->id ] ) || $columns || $this->get_option( 'per_page' );
851
852           $this->_screen_settings = apply_filters( 'screen_settings', '', $this );
853
854           switch ( $this->id ) {
855                case 'widgets':
856                     $this->_screen_settings = '<p><a id="access-on" href="widgets.php?widgets-access=on">' . __('Enable accessibility mode') . '</a><a id="access-off" href="widgets.php?widgets-access=off">' . __('Disable accessibility mode') . "</a></p>\n";
857                     break;
858           }
859
860           if ( $this->_screen_settings || $this->_options )
861                $show_screen = true;