How to implement this outline logic in Beamer?

Question

I'm working on my Ph.D. dissertation defense presentation, using Beamer LaTeX package. I've tried to implement a certain logic of presenting an outline gradually, section by section - exactly as this excellent presentation does. However, my presentation does not work as I have expected. I would appreciate, if people would provide me with a minimal working example, implementing that logic, as follows. Your help is much appreciated!

• Show title page;

• Show overall outline (1st level only);

• Show outline of the 1st item (2nd level only, 1st sub-item active, other - greyed out);

• Show slide(s), covering the 1st item;

• Show outline of the 1st item (2nd level only, 2nd sub-item active, other - greyed out);

• ... (iterate through other items; when appropriate, I need to expand the same logic to deeper levels - likely 3rd levels only)

• Show outline of Nth item (2nd level only, 1st sub-item active, other - greyed out);

• ... (iterate through other sub-items)

Answer 1

As I've said in the comment above, I was able to figure this out by reading the Beamer manual, as was suggested by @Astrinus, and playing with the code. Anyway, I'm posting my solution below, hoping that it could be useful to other people (obviously, this is just a skeleton of the real presentation that I'm working on). Essentially, the solution is two-fold:

1) provide statement \frame{\tableofcontents[hideallsubsections]} before section definitions (was missing);

2) set correct combination of parameters sectionstyle and subsectionstyle for the AtBeginSubsection's \tableofcontents command (had to tweak my original settings).

\documentclass[12pt]{beamer}
\usepackage{palatino}

\usetheme{Boadilla}
\useinnertheme{rectangles}
\beamertemplateshadingbackground{gray!5}{gray!20}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{tikz} % http://tex.stackexchange.com/a/27920/48376

\author{Aleksandr L. Blekh}
\title[Ph.D. Dissertation Defense]{Governance and Organizational Sponsorship as Success Factors in Free/Libre and Open Source Software Development}
\subtitle{An Empirical Investigation using Structural Equation Modeling}
%\logo{\includegraphics[scale=0.3]{images/logoNSU}}
\institute[GSCIS / NSU]{Graduate School of Computer and Information Sciences\\
    Nova Southeastern University}
\date{\today}
\setbeamertemplate{navigation symbols}{}

\AtBeginSubsection[]
{
    \begin{frame} %<beamer>
        \frametitle{Outline}
        \setcounter{tocdepth}{2}
        \tableofcontents[
        currentsection,
        currentsubsection,
        sectionstyle=show/hide,
        subsectionstyle=show/shaded/hide
        ]
    \end{frame}
}

\begin{document}

    \maketitle

    \frame{\tableofcontents[hideallsubsections]}    

    \section{Introduction}
    \subsection{Background and Problem}

    \begin{frame}{Background and Problem Sample Slide}
        \begin{itemize}
            \item First point
            \item Second point
            \item Third point
            \item Fourth point
            \item Fifth point
        \end{itemize}
    \end{frame}

    \subsection{Research Goals and Questions}
    \subsection{Relevance and Significance}
    \subsection{Assumptions, Limitations and Delimitations}
    \subsection{Summary}

    \section{Existing Research}
    \subsection{Information Systems Success}
    \subsection{Free/Libre and Open Source Software (FLOSS)}
    \subsection{The Success of FLOSS}
    \subsection{Research Focus}
    \subsection{Governance in FLOSS Projects}
    \subsection{Organizational Sponsorship in FLOSS Projects}
    \subsection{Governance in Sponsored FLOSS Projects}
    \subsection{Detailed Research Model}
    \subsection{Hypotheses}

    \section{Methodology}
    \subsection{Research Design}
    \subsection{Unit of Analysis and Statistical Sampling}
    \subsection{Measurement of Variables}
    \subsection{Data Collection and Validation}
    \subsection{Data Analysis}
    \subsection{Research Phases}
    \subsection{Structural and Measurement Models}
    \subsection{Sample Size Assessment}
    \subsection{Validity and Reliability}

    \section{Results}
    \subsection{Research Workflow: Reproducible Research Approach}
    \subsection{Design of Research Software}
    \subsection{Reformulated Hypotheses}
    \subsection{Data Collection and Sampling}
    \subsection{Exploratory Data Analysis (EDA)}
    \subsection{Exploratory Factor Analysis (EFA)}
    \subsection{Confirmatory Factor Analysis (CFA)}
    \subsection{Structural Equation Modeling (SEM)}
    \subsection{Alternative SEM Models}
    \subsection{Validity and Reliability}
    \subsection{Hypotheses Testing}

    \section{Conclusions}
    \subsection{Discussion}
    \subsection{Implications}
    \subsection{Limitations}
    \subsection{Future Research}
    \subsection{Summary}

\end{document}

Unfortunately, there are still two pending issues: 1) the table of contents slide (main outline) doesn't have a title; 2) the code doesn't show fully (w/o shading sub-items) the contents of each subsequent section before going into show/shaded/hide mode. Any advice on how to fix those issues would be appreciated (not sure about #2, though - maybe it is an acceptable behavior).