Function of screen called from custom widget (keyboard)

[ELero.1]

Hello,

I've followed the example given in the link below in order to call the screen from the container. It works perfectly when I implement it in one of my custom containers.

https://community.st.com/s/question/0D50X0000AFpwBxSQJ/can-you-call-a-method-on-view-from-a-custom-container?t=1665565737450

The problem I'm facing now is that I'm trying to do the same with the keyboard example given by touchgfx (custom widget now and no more custom container) (when I attain the end of my buffer, I want to show a button in my screen (and hide it if the use hits backspace)). Added a few functions of my own too.

I have this error:

 gui/src/containers/CustomKeyboard.cpp: In member function 'void CustomKeyboard::keyboard_complete(bool)':
 gui/src/containers/CustomKeyboard.cpp:185:9: error: invalid use of incomplete type 'class ConnectChargerView'
 viewPtr->ECCD_keyboard_complete(visible);
 ^~
 In file included from gui/src/containers/CustomKeyboard.cpp:1:0:
 gui/include/gui/containers/CustomKeyboard.hpp:16:7: note: forward declaration of 'class ConnectChargerView'
 class ConnectChargerView;
 ^~~~~~~~~~~~~~~~~~

When I add the include of my screen into the CustomKeyboard.hpp (include <gui/connectcharger_screen/ConnectChargerView.hpp>)

I have this error:

 In file included from gui/include/gui/containers/CustomKeyboard.hpp:12:0,
 from gui/src/containers/CustomKeyboard.cpp:1:
 gui/include/gui/connectcharger_screen/ConnectChargerView.hpp:36:5: error: 'CustomKeyboard' does not name a type
 CustomKeyboard keyboard;

My screen contains a function for the button:

void ConnectChargerView::ECCD_keyboard_complete(bool visible)
{
	buttonConnectCharger.setVisible(visible);
}

And a protected variable keyboard:

CustomKeyboard keyboard;

I'm attaching my keyboard.cpp and .hpp

Is there something wrong I'm doing or that I didn't understand about custom widgets?

Thanks in advance for your help,

Eve