X11keysymdefh

X11keysymdef.h is a header file in the X Window System, a widely used windowing system for Unix-like operating systems. It defines symbolic names for keys on a keyboard, which are used to map key presses to specific actions in X applications. This file is part of the Xlib library, which provides the core functionality for X applications.

The keysyms defined in X11keysymdef.h are organized into several categories, including alphanumeric keys, function keys, modifier keys, and special keys. Each keysym is assigned a unique integer value, which can be used to identify the key in X events. For example, the keysym for the 'A' key is defined as XK_A, and the keysym for the '1' key is defined as XK_1.

The X11keysymdef.h file is typically included in X applications using the #include directive. Once included, the keysyms can be used to handle key events in the application. For example, an application might use the XK_Left key to move a cursor left when the left arrow key is pressed.

The X11keysymdef.h file is an important part of the X Window System, providing a standardized way to handle keyboard input in X applications. It is widely used in X applications, including window managers, terminal emulators, and text editors. The file is maintained as part of the X.Org Foundation's X Window System project, and updates are released as part of the standard X11 software distribution.