How to design a nice looking chapter title and page

Question

I want to create something like the images I have below:

( I couldn't draw well the chapter number and its font)

and

( I couldn't draw well the page number)

--------------UPDATE According to Gonzalo Medina answer---------------------

\documentclass[a4paper,12pt,oneside]{report} 

\usepackage{fontspec}
\usepackage{xunicode}

\setmainfont{Times New Roman}
\usepackage{polyglossia}
\setmainlanguage{greek}
\setotherlanguage{english}
\usepackage{fixltx2e} %to use  _ and ^
\usepackage{url}
\usepackage{indentfirst}
\usepackage{wrapfig} % for wrapping graphics with text
\usepackage{float} % for images
\usepackage[a4paper,left=2cm,top=2.5cm,right=2cm,bottom=2.5cm]{geometry}
\usepackage{graphicx, amsmath, lettrine,amssymb}
\usepackage{fancyhdr,verbatim}
\usepackage{rotating,appendix}
\usepackage{ucs}
\usepackage{longtable} 
\usepackage{listings} 
\usepackage{caption}
\usepackage{capt-of}
\usepackage{underscore} %in order to use __
\usepackage{hyperref} % to make hyperlinks

 %----------------------------for changing the chapter format-------------------
\usepackage[explicit]{titlesec}
\usepackage{tikz}

\titleformat{\chapter}[display]
  {\Huge\scshape}
  {\filleft\tikz\node[fill=green!50!black!10,rectangle,rounded corners=6pt] (chap) {\chaptertitlename};}
  {0ex}
  {\colorbox{green!50!black!10}{\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\vskip1ex#1\vskip1ex}}}



%-------------------------------------------------------------------------------






\begin{document}

\thispagestyle{empty}

\renewcommand{\chaptername}{}
\newcommand{\EN}[1]{\foreignlanguage{english}{#1}} %in order to write english as \EN{Some words in English}

\addtocontents{toc}{\protect\thispagestyle{empty}} %to remove numbering the page from table of contents (ToC)
\tableofcontents
\thispagestyle{empty}


\chapter*{Preface}

\thispagestyle{empty}
\indent some text

\chapter {Chapter 1}

\textbf {\LARGE Intro}

\setcounter{page}{1}

\section {History}

\indent     Some text ggttg


\section {Another}

\indent    some text



\chapter {Chapter 2}

\textbf {\LARGE Two}
\section {History2}

\indent     text
\end{document}

Using the above code i receive

I want

Also,for the second layout ,almost the same.It shows "1:Chapter 1" instead of "1:Intro". All i want is at every page (except from the first page of each chapter) to show the page number and the title of that chapter

Answer 1

Here's one possibility using the titlesec package: according to comments, the chapter number had to be removed. Also, there's no need to use the redefinition for \@makechapterhead; all formatting aspects can be modified/controlled in an easier way using \titleformat:

\documentclass{book}
\usepackage[explicit]{titlesec}
\usepackage{tikz}

\titleformat{\chapter}[display]
  {\Huge\scshape}
  {\filleft\tikz\node[fill=green!50!black!10,rectangle,rounded corners=6pt] (chap) {\chaptertitlename};}
  {0ex}
  {\colorbox{green!50!black!10}{\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\vskip1ex#1\vskip1ex}}}

\begin{document}

\chapter{A Test Chapter}

\end{document}

For the second layout, you can do something like the following (I should mention that having the page number in the chapter heading seems a little strange):

\documentclass{book}
\usepackage[explicit]{titlesec}
\usepackage{tikz}

\titleformat{\chapter}[display]
  {\Large\scshape}
  {}{0ex}
  {\colorbox{green!50!black!10}{\colorbox{green!50!black!20}{\parbox{1cm}{\thepage}}\parbox{\dimexpr\textwidth-2\fboxsep-1cm\relax}{\filcenter\vskip1ex\chaptername~\thechapter: #1\vskip1ex}}}

\begin{document}

\chapter{A Test Chapter}

\end{document}

After comments added to the original question, I think that now I know what was requested: the following example shows a modification of the formatting for chapter headings and also a modification to the headers achieved with the help of the fancyhdr package:

\documentclass[a4paper,12pt,oneside]{report} 
\usepackage{fontspec}
\usepackage{xunicode}
\usepackage[explicit]{titlesec}
\usepackage{fancyhdr}
\usepackage{tikz}
\usepackage{lipsum}% just to generate filler text for the example

 %----------------------------for changing the chapter format-------------------
\titleformat{\chapter}[display]
  {\LARGE\scshape\bfseries}
  {\filleft\tikz\node[fill=green!50!black!10,rectangle,rounded corners=6pt] (chap) {\chaptertitlename~\thechapter};}
  {0ex}
  {\colorbox{green!50!black!10}{\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\vskip1ex#1\vskip1ex}}}

 %----------------------------for changing the header-------------------
\fancyhf{}
\fancyhead[L]{\colorbox{green!50!black!10}{\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\colorbox{green!50!black!40}{\thepage:} \leftmark}}}
\renewcommand\headrulewidth{0pt}
\setlength\headheight{24pt}
\pagestyle{fancy}
\renewcommand{\chaptermark}[1]{% 
  \markboth{#1}{}} 

\makeatletter
\let\ps@plain\ps@empty
\makeatother

\begin{document}

\tableofcontents

\chapter {Intro}
\section {Another}
\lipsum[1-15]
\chapter {Two}
\section {History2}
\lipsum[1-15]

\end{document}