This chapter describes event-driven programming using timers and asynchronous I/O facilities. The
after command causes Tcl commands to occur at a time in the future, and the
fileevent command registers a command to occur in response to file input/output (I/O). Tcl commands discussed are:
Event-driven programming is used in long-running programs like network servers and graphical user interfaces. This chapter introduces event-driven programming in Tcl. Tcl provides an easy model in which you register Tcl commands, and the system then calls those commands when a particular event occurs. The
after command is used to execute Tcl commands at a later time, and the ...