Rif.: hovering activates command button

[mzimmers]

I created a command button via the Create->Command Button menu option. It was working fine, but somewhere in my mucking around, I've gotten it so it acts as though it's pressed when I simply move the mouse key over it. I can't find an attribute that would cause this behavior. Can anyone help me with this?

Thanks.

[Wolfgang]

On what events are you reacting.... could it be that you changed the callback routine to trigger on GOT_FOCUS or LOST_FOCUS instead of EVENT_COMMIT?

[RobertoBozzolo]

Most probably you have some code that is not tied to any event and so it's fired on EVENT_MOUSE_POINTER_MOVE events that are received by the control callback every time the pointer passes over it. Place a breackpoint inside the control callback and look at 'event' variable value, searching it in the list of events.

[mzimmers]

Roberto -

You're definitely onto something. Event comes back as 33, which matches EVENT_MOUSE_POINTER_MOVE (I looked it up in userint.h).

When I first created this button, it wasn't doing that. I just checked my defaults, and it's not selected in there.

So...how do I correct this? I can't find anything when I edit the command button.

Thanks!

[RobertoBozzolo]

It's not an option in control properties, it's how your code is structured:

int CVICALLBACK Impostazione (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	// This code is executed on any event. EVENT_MOUSE_POINTER_MOVE
	// is the most frequent one but not the only one
	DoSomething ();

	switch (event) {
		case EVENT_COMMIT:
			// This code is executed only when you press the button
			DoSomething ();
			break;
	}
	return 0;
}

The first DoSomething () is normally to be avoided...

[mzimmers]

I see. Does the creation of automatic variables count as "doing something?" Because at this point, that's all I have up there.

[Daniel-E]

mzimmers,

Could we see the callback function code? That might help shed some light on the situation.

[mzimmers]

int CVICALLBACK StartButtonCB (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	int		line, x, y;
	int		i;
	int		lockBusy;
	
	switch (event)
	{
		case EVENT_COMMIT:
			while (CmtGetLockEx(inUse, 0, 100, &lockBusy));	   // wait for lock in 100 ms durations.
			i = 0;
			while (sscanf(callbackData, "%d  %x  %x", &line, &x, &y) > 0 && (i < CONST_POINTS))
			{
				constArray[0][i] = x;
				constArray[1][i] = y;
				++i;
			}
			plot(i); 	// plot the points.
			CmtReleaseLock (inUse);
			break;
		case EVENT_RIGHT_CLICK:

			break;
	}
	return 0;
}

Thanks for looking.

[RobertoBozzolo]

This callback responds only to commit and right-click events, so what lets you think the callback is "activated" while hovering the mouse on the button? How you detect this fact?

[mzimmers]

I've just re-read the replies in this thread, and I think I know realize what was happening.

If I understand correctly now, the callback is executed on ANY event, not just the types specified in the callback routine, or the default types upon creation of the control?

I had a breakpoint at the top of my CB routine, and it was getting hit whenever I'd mouse-over the button. Hence, my confusion.

So...is there a way to program the object NOT to respond to a mouse-over, or is that just the way the package works?

Thank you all for the answers.