diff options
Diffstat (limited to 'doc/HandleEvent.3')
| -rw-r--r-- | doc/HandleEvent.3 | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/doc/HandleEvent.3 b/doc/HandleEvent.3 index 7909274..4d24c14 100644 --- a/doc/HandleEvent.3 +++ b/doc/HandleEvent.3 @@ -18,14 +18,15 @@ Tk_HandleEvent \- invoke event handlers for window system events .SH ARGUMENTS .AS XEvent *eventPtr .AP XEvent *eventPtr in -Pointer to X event to dispatch to relevant handler(s). +Pointer to X event to dispatch to relevant handler(s). It is important +that all unused fields of the structure be set to zero. .BE .SH DESCRIPTION .PP \fBTk_HandleEvent\fR is a lower-level procedure that deals with window events. It is called by \fBTcl_ServiceEvent\fR (and indirectly by -\fBTk_DoOneEvent\fR), and in a few other cases within Tk. +\fBTcl_DoOneEvent\fR), and in a few other cases within Tk. It makes callbacks to any window event handlers (created by calls to \fBTk_CreateEventHandler\fR) that match \fIeventPtr\fR and then returns. In some cases |