Right click to create new popup menus. Clicking over an existing popup menu will create a child menu. Left click to close all menus. Hover to display a tooltip that is the child of the window below it. Closing the application closes the root window, which should automatically destroy any open popup windows and exit gracefully.
Simple DirectMedia Layer is a cross-platform development library designed
to provide low level access to audio, keyboard, mouse, joystick, and graphics
hardware via OpenGL and Direct3D. It is used by video playback software,
emulators, and popular games including Valve's award winning catalog
and many Humble Bundle games.
More extensive documentation is available in the docs directory, starting
with README.md