code-browser | Online browser for java open-source projects

I'm learning Visual Studio 2015 Community. I'm a seasoned programmer, but new to VS, and the file representation is confusing me. I've created a solution, and added an existing project. VS is showing me all project files (In my case a C++ project, so .c, .cpp, and .h files) on one tree level in Solution Explorer.

In contrast, if I open said project in something like Sublime Text, VS Code, notepad++, or the like, I see the proper directory structure as it sits on the disk drive; as one would see it in File Explorer/Finder or ls/dir in a terminal.

I have done my homework before I posted, and in the following thread, @Andrey states:

I am afraid there is no such concept in MSVS like "directory structure". Moreover, MSVS doesn't really need it because it uses flat projects and hierarchies are based on project level, not on the file/directory level.

As there is no such thing - you can't have it neither automatically nor manually. MSVS has solution folders which is quite different thing and there isn't much sense in expressing real folders as solution folders.

Visual Studio as Code Browser : How to preserve the directory structure?

Is this true? There is much meaning in the arrangement of files, and the flat representation in VS makes a project harder to understand; file location in the directory structure are important. Is there a way to view the proper directory structure in VS?

In my situation, I'm working with Quickfix, which supports multiple versions (4.0, 4.1, 4.2, etc.). Each of these have different classes and files with the same name.

As you can see from the screen shots below, they are all neatly arranged in different folders on disk, but VS's representation of these files is immensely confusing: