Add Qt Creator instructions

README.md

@@ -47,6 +47,30 @@ make
 ***Note:*** To use SDL2_image, SDL2_ttf or SDL2_gfx, you should uncomment
 some instructions in the CMakeLists.txt file and re-execute `cmake ..` and `make`
 
+### Open the project with an IDE under Linux
+
+#### Open with Qt Creator
+
+[Qt Creator][] is a cross-platform C/C++ IDE, originally dedicated for the Qt framework.
+It handle natively CMake projects and provide an efficient code completion.
+
+*Install Qt creator:*
+
+Install from Debian/Ubuntu repo:
+
+```sh
+sudo apt install qtcreator
+```
+
+Online installer: https://www.qt.io/download-thank-you?hsLang=en<br>
+Offline installer: https://www.qt.io/offline-installers
+
+*Open the project:*<br>
+Run Qt Creator, use `Open Files or Project ...` and select the `CMakeLists.txt`
+file of the cloned project.<br>
+Finally, build and run the project.
+
+
 ## License
 
 This project is distributed under the terms of the MIT license
@@ -60,3 +84,4 @@ This project is distributed under the terms of the MIT license
 [SDL2_image]: https://www.libsdl.org/projects/SDL_image
 [SDL2_ttf]: https://www.libsdl.org/projects/SDL_ttf
 [SDL2_gfx]: http://www.ferzkopp.net/wordpress/2016/01/02/sdl_gfx-sdl2_gfx
+[Qt Creator]: https://doc.qt.io/qtcreator