presenter | Presenter pattern | Application Framework library

I'm new to stack overflow so feel free to let me know anything that I am missing to include that will help you all in solving my issue.

I am creating a basic notes application on Android Studio using Dart and Flutter. The issues that I am running into are

• I keep getting a red error screen that says "Type 'init' is not a subtype of type 'string'"
• As well as to when I try to do 'List todo = List();' I get "The default 'List' constructor isn't available when null safety is enabled."

I've been trying to resolve this issue, but been stuck/have been struggling with it for a while now. Was hoping on any advice/how to go about this issue.

Here is my Code, any help is much appreciated:

I am creating multi module android project using java. I got Null when I inject a class. Followings are my codes.

SignupComponent.class

I'm trying to integrate a unity application (.exe) inside a WPF XAML application. I've managed to get the unity window to open inside the WPF window, but it's stuck in the top left corner of the window and does not resize when I resize the WPF window.

Here is my code, (the unity application is called unityWindow.exe):

MainWindow.xaml

I want to pass the data from one table view cell to another one table view cell . I want to add those table view cell values to another segment control when user click the add the button . I have two table view with cell in same view controller . I am following delegate to implement it but I facing some issues .

1. I used the isHide methods to hide the specific table view based on segment control selection , still show the both table views although I wanted to show one and both segment the same data is displaying .

Here is the code .

I have following JSON. I want to get key-value pair objects based on their role. In this example there are 3 roles(Presenter, Approver, Customer) but there can be more as it is dynamic.

JSON

So i wrote a program to manipulate a file with questions and answers to a specific order so a program by the name of active presenter can read it and turn it into a quiz. I am pretty new to coding and my code is garbage. I mostly wanna reduce the size of my if statements because i wanna include every word from the alphabet in it. How would i got about doing this?

my code:

I have a Raspberry Pi 4 Model B Rev 1.4 and I am using Ubuntu 20.04 running in VirtualBox on a Windows 10 machine.

I have been following the steps presented in this video https://www.youtube.com/watch?v=TmtN3Rmx9Rk&list=PLXAxzIhirYJGp1dMN0SxMRNCumubmpzWj&index=2&t=1686s. The goal is to run QT C++ applications on the Raspberry Pi

@24.20, the presenter issues the command:

rsync -avz --rsync-path="sudo rsync" pi@192.168.1.237:/lib sysroot

His host machine receives a number of files. On the video I can see the contents of lib/firmware, lib/modules.bak, lib/modules, lib/udev

However, when I issue the same command, I only receive a symbolic link

in the clear architecture, what uncle bob suggested.

I have a lot of questions about how to correctly distribute the responsibility.

it seems that there is no relationship between controller and presenter. the controller's job is to take the input and trigger the use case and the presenter's job is to take the output data provided from the use case and display it on the view.

here it seems that the view very dumb object and its only function is to display the data to the UI, it makes sense in case the controller is invoked by an external agency only.

but how the controller is accessed in the case of the web?. the user interacts with the view so the view should hold the instance of the controller and enough intelligence to invoke the correct methods of the controller. in this case, the view. is not really a dumb object it has the intelligence to how to invoke the controller,

or it's the job of the presenter to invoke the controller? depending upon the Contax and then finally invoke the view to display the data.

or the controller is closely bonded to the view? so that all the intelligence exists in the controller only and the view transfers the raw event and data. But doing so the controller will know too much about the view and will be dependent on the view.

one more question, say suppose after invoking the use case, u which was success full but the UI want some more data to display the result to the UI.

so where does the logic of fetching more data reside?

1. is it in the view hereafter the use case was successful the use case will invade the presenter, and the presenter will send the msg to view, then the view will request more data from the controller to display?

2. is it in the Presenter? so after the use case was successful with the success message. then presenter will invoke the controller to get the additional data to display and pass it to the view.

3. is it in the controller? where after getting the success return response from the use case the controller will again invoke the other use case which will display the additional data to the view via presenter.

4. is it in the use case?. where the use case will itself decide to send additional data to display to the user, however, I am not convinced with this since it should not be up to the use case to think about which data is being presented, it will bind the use case to the one type of presentation since the same could not be a true presentation, for example, CLI might not require the additional data.

Also who actually creates the controller and presenter, is the main function creating every presenter and controller, or does the high-level controller create the low-level controller and presenter and pass it to the presenter?

I'm Stuck creating a Master/Detail View in WinUI 3.

screenshot

I Have a treeview as my master list with two different item types ExplorerItemTypeA and ExplorerItemTypeA each a partial class from the base ExplorerItem

I wish for the detail view to show the correct template for the different type (A&B) so I can bind and edit etc.

The Treeview DataTemplates work fine. Here is the XAML for the details view: