I would like to add a new Field (Select list of all menu-items) to the menu item-edit form. To do so I was setting up an system plugin with the following directory structure:
As you can see in the posted code, that is all very basic to try out.
Only after adding the following lines:
<li> <?php echo $this->form->getLabel( 'langroot-text', 'main' )?> <?php echo $this->form->getInput('langroot-text', 'main' ); ?> </li>
a textfield shows up.
Is it possible to inject the field without touching the edit.php? Is there anywhere a good tutorial about the JForm api? Is a system-plugin the right kind, or could it be a content plugin, or should it even be a component?