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- .so man.macros
- .HS Tk_BackgroundError tkc
- .BS
- .SH NAME
- Tk_BackgroundError \- report Tcl error that occurred in background processing
- .SH SYNOPSIS
- .nf
- \fB#include <tk.h>\fR
- .sp
- \fBTk_BackgroundError\fR(\fIinterp\fR)
- .SH ARGUMENTS
- .AS Tcl_Interp *interp
- .AP Tcl_Interp *interp in
- Interpreter in which the error occurred.
- .BE
-
- .SH DESCRIPTION
- .PP
- This procedure is typically invoked when a Tcl error occurs during
- ``background processing'' such as executing a Tcl command in response
- to a button press or menu entry invocation.
- When such an error occurs, the error condition is reported to Tk
- or to a widget or some other C code, and there is not usually any
- obvious way for that code to report the error to the user.
- In these cases the code calls \fBTk_BackgroundError\fR with an
- \fIinterp\fR argument identifying the interpreter in which the
- error occurred.
- \fBTk_BackgroundError\fR attempts to invoke the \fBtkerror\fR
- Tcl command to report the error in an application-specific fashion.
- If no \fBtkerror\fR command exists, or if it returns with an error condition,
- then \fBTk_BackgroundError\fR reports the error itself by printing
- a message on the standard error file.
-
- .SH KEYWORDS
- background, error, tkerror
-