Documentation updated

Author: ConstantRobotics

README.md

@@ -53,3 +53,111 @@ int main(void)
     return -1;
 }
 ```
+
+# Build and connect to your project
+
+Typical commands to build **SimpleFileDialog** library:
+
+```bash
+git clone https://github.com/ConstantRobotics-Ltd/SimpleFileDialog.git
+cd SimpleFileDialog
+mkdir build
+cd build
+cmake ..
+make
+```
+
+If you want connect **SimpleFileDialog** library to your CMake project as source code you can make follow. For example, if your repository has structure:
+
+```bash
+CMakeLists.txt
+src
+    CMakeList.txt
+    yourLib.h
+    yourLib.cpp
+```
+
+You can add repository **SimpleFileDialog** as submodule by commands:
+
+```bash
+cd <your respository folder>
+git submodule add https://github.com/ConstantRobotics-Ltd/SimpleFileDialog.git 3rdparty/SimpleFileDialog
+```
+
+In you repository folder will be created folder **3rdparty/SimpleFileDialog** which contains all library files. New structure of your repository:
+
+```bash
+CMakeLists.txt
+src
+    CMakeList.txt
+    yourLib.h
+    yourLib.cpp
+3rdparty
+    SimpleFileDialog
+```
+
+Create CMakeLists.txt file in **3rdparty** folder. CMakeLists.txt should contain:
+
+```cmake
+cmake_minimum_required(VERSION 3.13)
+
+################################################################################
+## 3RD-PARTY
+## dependencies for the project
+################################################################################
+project(3rdparty LANGUAGES CXX)
+
+################################################################################
+## SETTINGS
+## basic 3rd-party settings before use
+################################################################################
+# To inherit the top-level architecture when the project is used as a submodule.
+SET(PARENT ${PARENT}_YOUR_PROJECT_3RDPARTY)
+# Disable self-overwriting of parameters inside included subdirectories.
+SET(${PARENT}_SUBMODULE_CACHE_OVERWRITE OFF CACHE BOOL "" FORCE)
+
+################################################################################
+## CONFIGURATION
+## 3rd-party submodules configuration
+################################################################################
+SET(${PARENT}_SUBMODULE_SIMPLE_FILE_DIALOG              ON  CACHE BOOL "" FORCE)
+if (${PARENT}_SUBMODULE_SIMPLE_FILE_DIALOG)
+    SET(${PARENT}_SIMPLE_FILE_DIALOG                    ON  CACHE BOOL "" FORCE)
+    SET(${PARENT}_SIMPLE_FILE_DIALOG_TEST               OFF CACHE BOOL "" FORCE)
+endif()
+
+################################################################################
+## INCLUDING SUBDIRECTORIES
+## Adding subdirectories according to the 3rd-party configuration
+################################################################################
+if (${PARENT}_SUBMODULE_SIMPLE_FILE_DIALOG)
+    add_subdirectory(SimpleFileDialog)
+endif()
+```
+
+File **3rdparty/CMakeLists.txt** adds folder **SimpleFileDialog** to your project and excludes test application (SimpleFileDialog class test applications) from compiling. Your repository new structure will be:
+
+```bash
+CMakeLists.txt
+src
+    CMakeList.txt
+    yourLib.h
+    yourLib.cpp
+3rdparty
+    CMakeLists.txt
+    SimpleFileDialog
+```
+
+Next you need include folder 3rdparty in main **CMakeLists.txt** file of your repository. Add string at the end of your main **CMakeLists.txt**:
+
+```cmake
+add_subdirectory(3rdparty)
+```
+
+Next you have to include SimpleFileDialog library in your **src/CMakeLists.txt** file:
+
+```cmake
+target_link_libraries(${PROJECT_NAME} SimpleFileDialog)
+```
+
+Done!