Building TGUI from source code with CMake
Linux (also BSD and Raspberry Pi)
Using TGUI from a CMake project
SFML_GRAPHICS backend (Uses sfml-graphics for everything)
SFML_OPENGL3 backend (Uses sfml-window and FreeType, using OpenGL to draw)
SDL_RENDERER backend (Uses SDL and SDL_ttf, using SDL_Renderer to draw)
SDL_TTF_OPENGL3 backend (Uses SDL and SDL_ttf, using OpenGL to draw)
SDL_TTF_GLES2 backend (Uses SDL and SDL_ttf, using OpenGL ES to draw)
SDL_OPENGL3 backend (Uses SDL and FreeType, using OpenGL to draw)
SDL_GLES2 backend (Uses SDL and FreeType, using OpenGL ES to draw)
GLFW_OPENGL3 backend (Uses GLFW and FreeType, using OpenGL to draw)
GLFW_GLES2 backend (Uses GLFW and FreeType, using OpenGL ES to draw)
Creating, copying and removing widgets
Switching between menu screens / forms
HorizontalLayout and VerticalLayout
Make sure to also look at the documentation and examples.