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+++ b/README.md
@@ -1,24 +1,31 @@
 ## Introduction
 
-This is minimal program that uses QtQuick library for creating user interface
-and using CMake as build system. The application created is simple in design and
-consists of sole window.
+This guide aims to create a simple Qt application with Qt Quick graphical user 
+interface. The tutorial uses CMake as the project format and C++ as the language 
+of source code. The application created is simple in design and consists of sole 
+window.
 
-## Built With
+QtQuick is a user interface library that provides ways to create declarative 
+user interface separated from the programming logic. It's framework is 
+implemented as a part of the Qt library set. QML is a user interface 
+specification and programming language.
 
-Compiling and running the project requires GCC, CMake, GNU Make
-and Qt development libraries with Qt Quick enabled.
+CMake is the project generator for many platforms and build systems. CMake uses 
+the unified file format and is able to generate makefiles, Visual Studio 
+solutions and projects for many other build systems from the same project file.
 
-* [CMake](http://cmake.org/) - Build system (>=2.8 is required).
-* [Qt](http://www.qt.io/) - Cross-platform library (>=5.7 is required).
+## Prerequisites
 
-## Dependencies
+Compiling and running the sample project requires GCC, CMake, GNU Make and Qt 
+development libraries with Qt Quick enabled. This tutorial specifies the way to 
+install pre-compiled packages from the standard repositories.
 
-Install the following packages to prepare the build.
+## Environment Setup
 
-### Ubuntu & Debian
+### Debian-based Systems
+
+The following instructions are applied to these operating systems:
 
-The following instructions are appliable to:
 * Ubuntu 16.04
 * Debian 9
 
@@ -32,7 +39,12 @@ sudo apt-get install -y \
     qml-module-qtquick-controls
 ```
 
-### CentOS 7
+### RedHat-based Systems
+
+The following instructions are applied to these operating systems:
+
+* CentOS 7
+* Fedora >=22
 
 ```
 sudo yum groupinstall -y "Development Tools"
@@ -44,21 +56,240 @@ sudo yum install -y \
     qt5-qtquickcontrols2-devel
 ```
 
-### Fedora >=22
+## Directory Structure
+
+The directory of the project is laid out as follows.
 
 ```
-sudo dnf groupinstall -y "Development Tools"
-sudo dnf install -y \
-    cmake \
-    qt5-qtbase-devel \
-    qt5-qtdeclarative-devel \
-    qt5-qtquickcontrols \
-    qt5-qtquickcontrols2-devel
+$ tree
+.
+├── CMakeLists.txt
+└── src
+    ├── CMakeLists.txt
+    ├── main.cpp
+    ├── main.qml
+    └── qml.qrc
+ 
+1 directory, 5 files
 ```
 
-## Build Project
+All source files for the project will go in src and main project specifications 
+in CMake format are in the `CMakeLists.txt` file. Larger projects tend to be 
+organised in sub-directories for modules, executables and libraries, each with 
+its individual sub-directory and `CMakeLists.txt` file within.
 
-Call the build of the solution and launch the application:
+## Main Window GUI File
+
+Start with declarative file for user interface that is specified in the file 
+`src/main.qml`. The code creates a small window without any controls.
+
+[src/main.qml](https://github.com/apriorit/MinimalQml/blob/master/src/main.qml)
+
+Necessary modules are imported. The exact version of the `QtQuick` library is not 
+the same as the version of the Qt framework used. `QtQuick.Controls` library 
+contains some basic controls for the user interface.
+
+```
+import QtQuick 2.0
+import QtQuick.Controls 1.0
+```
+
+Main application window is represented with the `ApplicationWindow` control in the 
+Qt Quick library. 
+
+```
+ApplicationWindow
+{
+...
+}
+```
+
+There are four attributes of the main window that specify the size and title of 
+the window. The `visible` attribute is required to specify that the window should 
+be shown in the screen right after launch.
+
+```
+visible: true
+width: 640
+height: 480
+title: qsTr("Minimal Qml")
+```
+
+## QML Resource File
+
+This is the QML resource file for the application that consists of sole QML file 
+named `main.qml`. The file is XML with `RCC` element as root and `qresource` as 
+element for group of resources. This project contains only one group that is the 
+root (i.e. `/`). Larger projects may contain additional qresource elements for 
+each resource subgroup (e.g. `customControls`, `customWindows`, etc.).
+
+[src/qml.qrc](https://github.com/apriorit/MinimalQml/blob/master/src/qml.qrc)
+
+## Application Code
+
+The main entry point of the application provides the C++ code for displaying Qt 
+Quick user interface.
+
+[src/main.qml](https://github.com/apriorit/MinimalQml/blob/master/src/main.cpp)
+
+Standard object for Qt application is constructed.
+
+```
+QApplication app(argc, argv);
+```
+
+Here the QML parsing object is initiated for the application. This object 
+receives the string with address of the main QML resource as the construction 
+parameter. In this case `qrc:/main.qml` is the address specified in the `qml.qrc` 
+file. `qrc:` is the default prefix for the QML resource, `/main.qml` stands for 
+resource named `main.qml` in the root resource directory (`/`).
+
+```
+QQmlApplicationEngine engine;
+engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
+```
+
+The `exec` method starts Qt application.
+
+```
+return app.exec();
+```
+
+## Project Files
+
+This section shows deployment of Qt Quick application using CMake project 
+format.
+
+This is the main project file. The first line sets the minimum version of CMake 
+for the project. It includes Qt5 framework into the application and concludes 
+with the further inclusion of the src subdirectory so that CMake would search 
+for the project file (`CMakeLists.txt`) there.
+
+[CMakeLists.tst](https://github.com/apriorit/MinimalQml/blob/master/CMakeLists.txt)
+
+This is the project file for the executable.
+
+[src/CMakeLists.tst](https://github.com/apriorit/MinimalQml/blob/master/src/CMakeLists.txt)
+
+The header files of the Qt project should be included into the project so that 
+makefiles generated will have them specified in the corresponding compilation 
+commands. There Qt5Widgets stands the header files for the Qt Framework and 
+QtQml invokes special files for QML functions.
+
+```
+include_directories(${Qt5Widgets_INCLUDE_DIRS} ${QtQml_INCLUDE_DIRS})
+```
+
+The definitions as well as Qt include files should be specified in the makefile 
+compilation commands.
+
+```
+add_definitions(${Qt5Widgets_DEFINITIONS} ${QtQml_DEFINITIONS}
+                ${${Qt5Quick_DEFINITIONS}})
+```
+
+The Qt framework requires the code to be created from the Qt resource files. 
+This is achieved using the special `qt5_add_resources` command. The QML resource 
+file path relative to this file is passed as an argument here.
+
+```
+qt5_add_resources(QT_RESOURCES qml.qrc)
+```
+
+For Qt projects with graphical user interface the compiler should receive 
+special parameters for compilcation
+
+```
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${Qt5Widgets_EXECUTABLE_COMPILE_FLAGS}")
+```
+
+Qt programs require several additional compilation steps for [moc](https://doc.qt.io/qt-5/moc.html),
+[rcc](https://doc.qt.io/qt-5/rcc.html) and [uic](https://doc.qt.io/qt-5/uic.html). 
+
+```
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
+```
+
+The name of the project that will be used as a name of the compiled executable 
+is specified using the set command that receives the name of a variable (i.e. 
+`PROJECT`) and it's value.
+
+```
+set(PROJECT "MinimalQml")
+```
+
+The project command sets the current project within the CMake file. It receives 
+the value of the variable defined above.
+
+```
+project(${PROJECT})
+```
+
+The compiler flags for compiling C++ sources are set below. These flags stands 
+for very strict compilation rules and help to detect and locate a lot of 
+potential issues during compilation.
+
+```
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror -std=c++11 
+    -fstrict-aliasing -pedantic-errors -pedantic -Wno-deprecated-declarations 
+    -Wno-unused-variable")
+```
+
+There are conditional commands in the CMake project language. The code below 
+detects if there are `HEADERS` in the project. If the header files were not set 
+before the `file(GLOB ... .h)` command creates a list of all header files in the 
+current directory and passes them as header files of the current project. The 
+same applies to the `.cpp` sources that will be stored in the `SOURCES` variable if 
+it was not defined.
+
+```
+if(NOT DEFINED HEADERS)
+    file(GLOB HEADERS ${CMAKE_CURRENT_SOURCE_DIR}/*.h)
+endif()
+ 
+if(NOT DEFINED SOURCES)
+    file(GLOB SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/*.cpp)
+endif()
+```
+
+The `source_group` definition creates a group of files that will be placed in some 
+build systems (e.g. there will be project sub-directories in Visual Studio 
+solution).
+
+```
+source_group("Header Files" FILES ${HEADERS})
+source_group("Source Files" FILES ${SOURCES})
+```
+
+This command states an executable file is the result of the project. The first 
+parameter receives the name of an executable file that is the same as the name 
+of the project in this case. The rest of the arguments are project sources, 
+headers and compiled Qt resources.
+
+```
+add_executable(${PROJECT} ${HEADERS} ${SOURCES} ${QT_RESOURCES})
+```
+
+The set of libraries that will be linked with the executable above is set with 
+the `target_link_libraries` command. Like the command above it receives the name 
+of project's executable and the list of libraries. In this case the project uses 
+Qt framework libraries only.
+
+```
+target_link_libraries(${PROJECT}
+    Qt5::Widgets
+    Qt5::Qml
+    Qt5::Quick
+    )
+```
+
+## Building Project
+
+The program is build with the commands below. The cmake required the directory 
+with the main project's `CMakeLists.txt` file as an argument. Then the CMake 
+creates the build files for the GNU make which builds an executable.
 
 ```
 cd <PathToProject>
@@ -67,10 +298,53 @@ cmake ..
 make
 ```
 
-After building the binary `MinimalQml` will end up in `build/src/`
+After the successful build the binary `MinimalQml` will end up in `build/src/`.
 
 ```
-cd build/src
-./MinimalQml
+./src/MinimalQml
 ```
 
+## Working with Project with Qt Creator
+
+Go to the *Welcome* tab *(1)* in the main window and select *Open Project* *(2)*.
+
+[[https://github.com/apriorit/MinimalQml/blob/master/img/qt101.png]]
+
+In the opened dialog locate the `CMakeLists.txt` file in the root directory of the 
+project.
+
+[[https://github.com/apriorit/MinimalQml/blob/master/img/qt102.png]]
+
+After that select the version of the *Qt framework* that will be used for 
+compiling the project. In case there are multiple frameworks installed in the 
+system it is possible to select several of them.
+
+[[https://github.com/apriorit/MinimalQml/blob/master/img/qt103.png]]
+
+After opening the project its directory structure will be visible in the *Projects* 
+panel in Qt Creator.
+
+[[https://github.com/apriorit/MinimalQml/blob/master/img/qt104.png]]
+
+The C++ source files are treated as usual by the editor.
+
+[[https://github.com/apriorit/MinimalQml/blob/master/img/qt105.png]]
+
+QRC resource files are opened as a resource tree.
+
+[[https://github.com/apriorit/MinimalQml/blob/master/img/qt106.png]]
+
+From the resource tree it is possible to open QML files of the project.
+
+[[https://github.com/apriorit/MinimalQml/blob/master/img/qt107.png]]
+
+## Links
+
+* Qt Documentation 
+ * [Qt QML](https://doc.qt.io/qt-5/qtqml-index.html)
+ * [Qt Quick](https://doc.qt.io/qt-5/qtquick-index.html)
+ * [QML Applications](https://doc.qt.io/qt-5/qmlapplications.html)
+* CMake
+ * [CMake Documentation](https://cmake.org/documentation/)
+ * [CMake Tutorial](https://cmake.org/cmake-tutorial/)
+
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