When _width is width

Question

I have possibly misunderstood but:
A set of child movieclips acting as buttons is positioned the
data created in an object
buttonDetails.xPos =
target.panel_txt._x+(target.panel_txt.width/2)+1
In this, width is incorrect and should , of course, be
_width. However the code worked correctly with the button being
placed where is should have been. This was with UIScrollBar added
to the main library.
I decided to remove the UIScrollBar and create my own
scroller. As soon as I did this my buttons ended up on top of each
other and not spaced out as they should be. After an hour of
tracing and swearing I have come to the conclusion that UIScrollBar
must create a width property for all text boxes (the box concerned
did not have the scroller attached. Now I know the UIScrollBar has
a width (not _width) property but I didn't know that it added the
width property to all text boxes.
Am I right? Has anyone else found that stuff that you would
expect to be unaffected is messed up when you remove a component.
My conclusion is to avoid using components at all since I am not
expert enough to know what they are doing to my movie.
Any thoughts?

Answer 1

I think one or two things could be causing the problem.
1.  Your DAQmx write is set for 1 sample.  I don't know how that dynamic signal type works with such a setting.  Perhaps it is just putting out the first sample of the signal that is generated.
2.  The math for the frequency of the square wave does not make sense.  You are adding a pulse delay with the pulse period, then inverting it to get the frequency.  So a 1 second delay with 1 second pulse is a 1/2 Hz wave.  A 4 second delay with a 2 second pulse would be a 1/6 Hz wave.  That doesn't make sense to me.
I would recommend building your own waveform or array and not using the express VI.  If you have a 1000 Hz frequency established let's say, build a 1000 element array.  For a .1 second pulse, set replace 100 of those elements with a 100 element array of the voltage value you want.  You can index it wherever you want in the array to account for whatever delay you want.  If you want a 1 msec pulse, then just replace a single element of that array wherever you want.