Communication from screen to backend

[KNara.2]

Hi,

I'm trying to send an event when a button is clicked.

I have added an interaction in Touchgfx designer to call a virtual function when the button is clicked.

In Screen1view.cpp I'm overwriting the virtual function

void SendDataOnButtonClicked()
{
presenter->SetMode();
}

in presenter.cpp

void Screen1Presenter::SetMode()
{
model->SendEvent();
}

In Model.cpp

void Model::SendEvent()

{

Send data to backend.

}

Is this the correct way of sending data to backend when button is clicked ?

Right now I'm stuck at view.cpp.

I dont know how to call presenter  from view.

Codes that I tried.

Method 1:

Screen1ViewBase::presenter->SetMode();

Method 2:

Method 2:

presenter->SetMode();

Both these codes are throwing compiler errors.

Can somebody please help and let me know the right way of accessing the function in presenter?

[JTP1 · Accepted solution]

Hello. Method 2 is correct. There must some simple problem at hpp file maybe ... This 'void SendDataOnButtonClicked()' must be of course 'void Screen1View::SendDataOnButtonClicked()'.

What is the exact error ?

Here you can get simple example of MVP communication in both directions:

https://community.st.com/t5/stm32-mcu-products/toggle-button-off-after-a-specific-interval/m-p/569065#M217071

[KNara.2]

Thank you so much @JTP1 .

Your solution helped.