Re: Checkbox in NSOutlineView. Must move mouse > 3 pixels to toggle

FROM : Sean McBride
DATE : Tue Aug 01 16:57:19 2006

On 2006-07-31 22:26, Jerry Krinock said:

>> However, I find that once I click in a checkbox, clicking again does not
>> re-send outlineView:setObjectValue:forTableColumn:byItem: unless I have
>> moved my mouse by greater than 3 pixels in any direction from where it was
>> during the previous click which successfully toggled it.

>
>It's not just my app.  Try this on an Intel Mac:
>
>1.  In Safari, menu > Bookmarks > Show All Bookmarks.
>2.  Show a folder that has some subfolders.
>3.  Click a disclosure triangle.  It expands.
>4.  Without moving the mouse, click again.  It collapses.
>5.  Without moving the mouse, click a third time.
>
>Expected result: It expands again.
>Actual result: Nothing happens.
>
> *SNIP*
>
>Can anyone reproduce this or guess what the problem might be?


I can repro it, in fact I just noticed it in an app of mine yesterday.
As you say, moving a few pixels 'fixes' it, however, clicking at slower
intervals also 'fixes' it.  So to me, it sounds like some kind of double-
click detection code in there.  I think you are clicking (to toggle)
fast enough that it thinks you are double-clicking, and the checkbox/
disclosure triangle controls ignore double clicks (apparently).  Does
this hypothesis fit what you see?

--
____________________________________________________________
Sean McBride, B. Eng                <email_removed>
Rogue Research                        www.rogue-research.com
Mac Software Developer              Montréal, Québec, Canada