| Re: Object Graphics Selection [message #20527] |
Sun, 09 July 2000 00:00  |
Michael Plonski
Messages: 5
Registered: May 2000
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Junior Member |
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I think the way to do this is to simply set the hide=1 property on the
objects you
don't want to be selected. I don't think it is neccessary to redraw the
screen, if I recall.
You can hide, select and then unhide.
Mike Plonski
David Fanning wrote:
>
> Mark Guagenti (mgenti@evansville.net) writes:
>
>> I'm running into a problem when trying to select an object from my object
>> graphics window. What I have is a image object in its own model that is
>> being displayed and then also various other objects, contained in another
>> model, such as text objects or polyline objects that are "on top" of the
>> image object. When I try to select an object it seems that only my image
>> object is being selected. What I want is one of the other objects to be
>> selected. How do I get it so that the image object cannot be
>> selected? This is my first attempt of working with object
>> graphics! Thanks for any help!
>
> As always with object graphics, you have a surfeit of
> possible solutions. :-)
>
> Let me suggest two. First, I assume you are not rotating
> this view in 3D space, so I presume you are looking flat
> onto the XY place. Pull the model that does not contain
> the image a little closer to your eye. That is, give it
> a slightly positive Z value. This won't change the
> appearance of the view (since things are viewed as
> "one-on-top-of-the-other" anyway), but it will make sure
> that in the selection array the things that are closest
> are listed first. In other words, the image now will be
> the *last* item in the selection list instead of the
> first. If you always deal with the first item (what I
> suspect you are doing if this is your first attempt at
> object graphics), then this should immediately solve
> your problem.
>
> Another idea is to give each thing you hope to
> select a "name". Then, when you want to do something,
> look at the selection array for the "name" of the thing
> you want to manipulate. If the name is "IMAGE" forget it
> and go to the next item in the selection list, etc.
>
> Good luck.
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Fanning Software Consulting
> Phone: 970-221-0438 E-Mail: davidf@dfanning.com
> Coyote's Guide to IDL Programming: http://www.dfanning.com/
> Toll-Free IDL Book Orders: 1-888-461-0155
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