Hi,
How do I go about getting FL_ENTER and FL_LEAVE events on objects
*with* the mouse button pressed or not.
Basically I want to detect any ENTER/LEAVE on any number
of objects (boxes with a pre_handler installed), but at the same
time detect when a MB is held down and the mouse moved ovber other
items.
BTW: it's a piano keyboard and I want to be able to press a key and
then move the mouse over others and have them activated with the
FL_ENTER event.
I find that in a pre-handler I can detect the events, but once a
FL_PUSH is detected, I can no longer detect FL_ENTER. I set FL_PREEMPT
on FL_PUSH, coz I do not want a redraw as it will foul up the keyoard
rendition!
The code below is the pre-emptive handler, with RELEASE and LEAVE
removed.
#include "forms.h"
#include "keyboard.h"
/* callbacks for form keyboard */
int kb(FL_OBJECT *ob,int event, FL_Coord mx,
FL_Coord my, int key, void *raw_event)
{
int retcode;
switch (event)
{
case FL_PUSH:
printf("Note pushed %d\n",(int)ob->u_ldata);
retcode = FL_PREEMPT;
break;
case FL_ENTER:
printf("Note entered %d\n",(int)ob->u_ldata);
retcode = !FL_PREEMPT;
break;
}
return retcode;
}
Any clues? I really want to do this with "standard" XFORMS calls, and do
not want to get into raw X (it's for a course!).8q
Regards, Rob
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