How to setup a 2/3 column Home View?

[ghost]

I'm trying to get into the secrets of SwiftCurrent, but struggling at several points.

What I'd like to achieve is to set up a home view that is able to switch between a two- and three-column layout, depending on the choice done in the sidebar view.

The problem here is that the sidebar view has NavigationLink s with a WorkflowLauncher for each for the destination view.

What would be necessary is to hand over somehow an indicator, if the selection shall result in a two- or in a three-column layout.

The HomeView itself is just a switch between these two values, with a root NavigationView with two or three destination in it.

While this is working in a classic approach, I have no clue how to hand back the selection from the sidebar view to the superior home view. From the documentation I understood that there is no view hierarchy with SwiftCurrent (what's actually what I'd need), but even with the articles, I found no way to do this.

Would be anyone so kind to give me a hint how this can be achieved?

[Richard-Gist]

Trying to understand here.... You have an option between seeing 2 columns or 3 columns. You have a view that toggles between 2 and 3, and that selection is floated back to HomeView. HomeView then shows 2 or 3 columns in a NavigationView. A NavigationView with a ColumnNavigationViewStyle? Is all that correct?

[ghost]

yes, that sounds correct.

[Richard-Gist]

Using columns is currently not officially supported. If you use .embedInNavigationView() when creating your WorkflowLauncher, it will use the preferred navigation view style (see implementation in WorkflowLauncher.swift) which tries to use the stack style.

HOWEVER, because WorkflowLauncher is just a view which itself contains NavigationLinks, you can embed the WorkflowLauncher inside of a NavigationView that you create and set the style to column style. I think it will then show additional columns as you proceed through the workflow. Using columns is not currently supported so you may see weird behavior (@Tyler-Keith-Thompson or @morganzellers can correct me if I'm wrong.)

So your code in MainView may look something like:

var body: some view {
  NavigationView {
    WorkflowLauncher(isLaunched: $isLaunched, args: "String in") {
         thenProceed(with: FirstView.self) {
             thenProceed(with: SecondView.self)
               .presentationType(.navigationLink)
         }.presentationType(.navigationLink)
     }
  }.navigationViewStyle(.columns)
}

Hopefully that helps.

[morganzellers]

Correct that columns are not currently supported. This looks like it should get you where you're wanting @innoreq - please come back with any more questions 👍🏻

[Tyler-Keith-Thompson]

So I read your request completely differently. I'm not seeing that you're using embedInNavigationView it seems like you already have your own NavigationLink with the destination as a WorkflowLauncher and you're just looking for a way to know in your sidebar what selection was chosen. For this I have 2 suggestions:

1. Use onFinish and just have it be an output of whatever workflow is in your sidebar.

WorkflowLauncher(isLaunched: .constant(true)) {
    thenProceed(with: FirstView.self)
}
.onFinish { print($0) } // This'll give you whatever FirstView outputs when `proceedInWorkflow` is called.

2. Use a binding value, much like you would without SwiftCurrent.

WorkflowLauncher(isLaunched: .constant(true), args: $columnSelection) {
    thenProceed(with: FirstView.self)
}

struct FirstView: View, FlowRepresentable {
    weak var _workflowPointer: AnyFlowRepresentable?
    
    @Binding var columnSelection: <#Type of column selection#>

    init(with columnSelection: Binding<<#Type of column selection#>>) {
        _columnSelection = columnSelection
    }
}

Now your binding will be updated just like it would anywhere else.

NOTE: None of this code was run through a compiler, it's just off the top of my head.

If neither answer is helpful try adding a code snippet so we can grok the problem space a bit more.

[nickkaczmarek]

@innoreq Did any of this help you out or would you like further assistance?