Wordpress admin bar and template div - php

Question

So I have created a wordpress template, and when i log in into wordpress there is a admin bar over main menu. This div wraps the other div's of the website.
My question is:
How can i set div margin-top: i.e. 50 pixels only when there is admin bar, ergo there is a user logged in?
EDIT:
So, this is my code of functions.php and it still doesnt work.
<?php
function new_excerpt_more( $more ) {
return '...<br /><br />Pročitaj još';
}
add_filter('excerpt_more', 'new_excerpt_more');
?>
<?php
if(is_admin_bar_showing() && !is_admin()) {
function link_to_stylesheet() {
?>
<style type="text/css">#wrapper{margin-top:150px;}</style>
<?php
}
add_action('wp_head', 'link_to_stylesheet');
}
?>
EDIT2:
I tried this too... It doesn't work.
<?php
if(is_admin_bar_showing() && !is_admin()) {
function link_to_stylesheet() {
?>
<style type="text/css">body{margin-top:150px;}</style>
<?php
}
add_action('wp_head', 'link_to_stylesheet');
}
?>

Answer 1

To apply top:50px in admin bar when on front end, you may try this (put this in functions.php)
if(is_admin_bar_showing() && !is_admin()) {
function link_to_stylesheet() {
?>
<style type="text/css">#wpadminbar {top:50px;}</style>
<?php
}
add_action('wp_head', 'link_to_stylesheet');
}
To remove admin bar completely, you may try this (put this in functions.php)
add_filter('show_admin_bar', '__return_false');
To remove admin bar from front end only for non-admin user (put this in functions.php)
add_action('after_setup_theme', 'remove_admin_bar');
function remove_admin_bar() {
if (!current_user_can('administrator') && !is_admin()) {
show_admin_bar(false);
}
}
You can setup from your back end (only for yourself) from Users -> Your Profile menu by removing check from
Show Toolbar when viewing site check box

Answer 2

I solved this by adding
<?php if ( is_user_logged_in() ) { ?>
<style type="text/css" media="screen">
body{margin-top:28px !important;}
</style>
<?php } ?>
To the functions.php

Answer 3

Whenever anybody is logged in and has a WPadminbar on the front-end
add this to your functions.php:
function adminbar_theme_setup() {
add_theme_support( 'admin-bar', array( 'callback' => 'custom_admin_bar_css') );
}
add_action( 'after_setup_theme', 'adminbar_theme_setup' );
function custom_admin_bar_css() { ?>
<style>body{margin-top:28px !important;}</style>
<?php
}