Help button in backend: window has no "Back" button Topic is solved

[david0058]

I have a backend component that shows help pages stored as articles, which contain links to other articles. This is triggered from the "Help" button in the menu bar.

However, the browser window that pops up to display the help information doesn't have Back/Forward/Refresh buttons (in fact the whole address bar is missing). It seems to assume that there can only be a monolithic help page per screen.

Is there any way to enable these?

Cheers,

David

[ceford]

In Firefox, if you right click on the Help page there is a popup menu with Backwards, Forwards and Reload links. Not the answer to your question but it might be a useful tip.

[david0058]

Thanks, that was the best I could come up with too, works on Chrome and Safari too.

It's not very intuitive tho', and many users don't know about right-clicking. I'll have a trawl through the core code and see if I can figure out how the Joomla team managed to hide the address bar buttons.

[david0058]

OK, in case anyone else has this problem, here's how I solved it ...

This code goes in .../administrator/views/xxx/view.html.php:

Code: Select all

    public function display($tpl = null)
    {
        $this->item  = $this->get('Item');

        // Check for errors.
        if (count($errors = $this->get('Errors')))
            throw new Exception(implode("\n", $errors), 500);

        $this->addToolbar();
        parent::display($tpl);
    }
    
    protected function addToolbar()
    {   
        JToolBarHelper::custom('dummyTask', 'arrow-left', 'arrow-left', 'Back', false);

        $doc = JFactory::getDocument();
        $doc->addScriptDeclaration("

            document.addEventListener('DOMContentLoaded', function() {
                var button = document.querySelector('#toolbar-arrow-left');
        
                if (button) {

                    if (window.history.length === 1) {
                        button.setAttribute('disabled', 'disabled');
                        button.setAttribute('aria-disabled', 'true');
                        button.classList.add('disabled');
                        button.style.pointerEvents = 'none'; 
                    }
                    else {
                        button.addEventListener('click', function(event) {
                            event.preventDefault();  
                            window.history.back(); 
                        });
                    }
                }
            });
        ");

        if (JFactory::getUser()->authorise('core.admin', 'com_component_name'))
            JToolBarHelper::preferences('com_component_name');
        else
            JFactory::getApplication()->input->set('hidemainmenu', true);

        JToolBarHelper::title(JText::_($this->item->title, 'help'));
    }