Yeah, good catch - showHiddenFiles works for both directories and files. However it's disabled for directory selection. Confirmed bug!

Hi - I don't have the wherewithall to fix this, but I think I can see where it's happening (at least on macOS):

In v2/internal/frontend/desktop/darwin/dialog.go you have this:

func (f *Frontend) OpenDirectoryDialog(options frontend.OpenDialogOptions) (string, error) {
	results, err := f.openDialog(&options, false, false, true)
	if err != nil {
		return "", err
	}
	var selected string
	if len(results) > 0 {
		selected = results[0]
	}
	return selected, nil
}

The &options argument to f.openDialog() includes the showHiddenFiles flag correctly. Good
The third argument to f.openDialog() (allowfiles) is false. Good
The fourth argument to f.openDialog() (allow directories) is true. Good

But, if I follow the call stack, in v2/internal/frontend/desktop/darwin/WailsContext.m you have this:

-(void) OpenFileDialog :(NSString*)title :(NSString*)defaultFilename :(NSString*)defaultDirectory :(bool)allowDirectories :(bool)allowFiles :(bool)canCreateDirectories :(bool)treatPackagesAsDirectories :(bool)resolveAliases :(bool)showHiddenFiles :(bool)allowMultipleSelection :(NSString*)filters {
    
    
    // <snip/>

    // Filters - semicolon delimited list of file extensions
    if( allowFiles ) {
        
		// <snip/>
        
        [dialog setAllowsMultipleSelection: allowMultipleSelection];
        [dialog setShowsHiddenFiles: showHiddenFiles];

    }

    // </snip>
    
}

So, as far as I can tell, because OpenFileDialog has been invoked with allowFiles: false, the setShowsHiddenFiles message will never be sent when opening a directory dialog, presumably leaving OpenFileDialog with the default behavior of not showing hidden files.

Would the fix be as simple as moving [dialog setShowsHiddenFiles: showHiddenFiles]; outside the if( allowFiles ) {} clause?

@davidnewhall
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