I'm in the process of migrating my site from Joomla 2.5 to Joomla 3.4. I have noticed that a component I developed does not show its toolbar on the admin side.
I put an
echo 'hello'; in
admin/toolbar.componentname.php, and the hello does not get called (it does on the 2.5 site). Thus there seems to be something wrong with whatever calls
There is a hint that says "In admin components the admin.*.php and toolbar.*.php are not automatically included anymore (this was a Joomla 1.0 legacy feature)." However, it does not say where this should be included. Looking at a stacktrace of the toolbar properly loading in Joomla 2.5 shows that it is being loaded by /libraries/joomla/application/component/helper.php (this component does not use MVC).