Support preview views UI

[drupal4share]

I have use defaul theme bootstrap. I copy folder modules/contrib/ui_patterns/tests/ui_patterns_test_theme/templates/patterns/button to themes/bootstrap/templates/patterns/button and clear cache. Create simple view use pattern lab Button. Preview of view don't working. Click button Update preview don't show anything. When i check log message, i saw have message error

"A fatal error occurred: Template "modules/contrib/ui_patterns/templates/pattern-button.html.twig" is not defined (Drupal\Core\Template\Loader\ThemeRegistryLoader: Unable to find template "modules/contrib/ui_patterns/templates/pattern-button.html.twig" in the Drupal theme registry.) in "modules/contrib/ui_patterns/modules/ui_patterns_views/templates/pattern-views-row.html.twig" at line 16."

[ademarco]

Actually patterns do not support views preview since they are bound to the theme that exposes them. I'll add a message stating it when clicking on the preview button, so we avoid that fatal.

[ademarco]

Message added, closing.

[jigarius]

A suggestion. Can the plugin expose a setting named: Preview theme? Most of the sites have one theme for visitors. If that theme can be used to render previews, the module will become even more useful and practical.

[mikemccaffrey]

I created #239 because the error message introduced in this ticket was not only showing up in Views previews, but also anytime one of my views is updated using an AJAX request.

It seems like the preview flag might always be set when returning view results using AJAX, so we might want to find another way to detect if they are a preview in the admin theme, or an update to a view in the front-end theme.