error.h File Reference

Variables
void(*	warning )(const char *,...)
void(*	error )(const char *,...)
void(*	fatal )(const char *,...)

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Detailed Description

Functions to report errors and possibly kill the program. You can change these pointers from their default values so that fltk calls your code instead.

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Variable Documentation

void(* error)(const char *format,...)

fltk will call this when it wants to report a recoverable problem. but in this case the display is so messed up it is unlikely the user can continue. Very little calls this now. The default version on Unix prints a message to stderr, on Windows it pops up a MessageBox, and then both versions call exit(1). You may be able to use longjmp or an exception to get back to your own code.

void(* fatal)(const char *format,...)

fltk will call this when it wants to report a problem that it cannot recover from. You must not make any fltk calls again. The default version is the same function as error().

void(* warning)(const char *format,...)

fltk will call this when it wants to report a recoverable problem. The display may be messed up but the user can probably keep working. (all X protocol errors call this). The default version on Unix prints a message to stderr, on Windows it pops up a MessageBox.

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