Xamarin.forms: Platform effects aren't attached to most GTK+ based components.

[sf-ica]

Description

Platform effects aren't attached to most GTK+ based components because the effect control provider of the Element base class isn't set.

Steps to Reproduce

1. Create a fancy GTK+ platform effect.
2. Attach it to a label.
3. Wonder why nothing happens.

Expected Behavior

The OnAttached() method of your effect should be called.

Actual Behavior

The OnAttached() method of your effect isn't called.

Basic Information

• Version with issue: 3.1.0.637273
• Last known good version: n/a
• IDE: Visual Studio 2018
  
  
  
  • GTK 3.1.0.637273
  
  

Details

Effects aren't attached when the related control provider isn't set:

https://github.com/xamarin/Xamarin.Forms/blob/master/Xamarin.Forms.Core/Element.cs#L539

Please create the controller in any GTK+ based control. You can simply use the RegisterEffectControlProvider() method from the EffectUtilities class.

[joseluisct]

I'm experiencing the same issue with effects in GTK, OnAttached() method is not called.

[Dainera]

We have the same thing in our project. Platform effects aren't attached.. Could somebody help?