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ENVI: group leader for envi_plot_data [message #40214]

Tue, 27 July 2004 00:32

Mort Canty
Messages: 134
Registered: March 2003

Senior Member

Hi again,

Another mystery (for me). I have a GUI with an event handler that looks like
this:

PRO on_button_1, event
widget_control, event.top, Get_Uvalue=info, /no_copy
.
.
envi_plot_data, info.X, info.Y, group = event.top
.
.
widget_control, event.top, Set_Uvalue=info, /no_copy
END

I would have thought that, when I now kill the base widget, the ENVI plot
would also be killed. It isn't.

- Mort

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Re: group leader for envi_plot_data [message #40296 is a reply to message #40214]

Wed, 28 July 2004 03:50

Mort Canty
Messages: 134
Registered: March 2003

Senior Member

Sorry, I forgot to ask for help on this one (probably explains why I haven't
got any yet) .

Thanks

- Mort

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Re: group leader for envi_plot_data [message #40302 is a reply to message #40296]

Tue, 03 August 2004 19:19

tianyf
Messages: 6
Registered: June 2004

Junior Member

I think it is the problem of envi_plot_data. I found a solution:
...
envi_plot_data, ..., base=base
widget_control, base, group_leader=event.top
...

That works fine in my test program.

Tian

"Mort Canty" <m.canty@fz-juelich.de> wrote in message news:<ceo1g3$7n57$1@zam602.zam.kfa-juelich.de>...
> "Reimar Bauer" <R.Bauer@fz-juelich.de> schrieb im Newsbeitrag
> news:cem75o$1491$1@zam602.zam.kfa-juelich.de...
>> Dear Mort
>>
>> I don't understand what you like to know from us.
>> This behaviour seems to be normal for me because
>> the envi plot is called within the event handler of the base widget.
>> The event handler is only called from the base widget. The plot needs
>> resources from the base widget e.g. a draw window or something else.
>> Then if you destroy the base all is over.
>>
>> Reimar
>>
>> --
> Hi Reimar,
>
> That's my problem: when I destroy the base widget, all is *not* over. The
> ENVI plot persists until I close it manually or until I close the ENVI
> session. If that is normal behavior, then I don't understand what the
> purpose of the keyword GROUP is in the ENVI_PLOT_DATA procedure.
>
> Mort

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Re: group leader for envi_plot_data [message #40316 is a reply to message #40296]

Tue, 03 August 2004 05:46

Mort Canty
Messages: 134
Registered: March 2003

Senior Member

"Reimar Bauer" <R.Bauer@fz-juelich.de> schrieb im Newsbeitrag
news:cem75o$1491$1@zam602.zam.kfa-juelich.de...
> Dear Mort
>
> I don't understand what you like to know from us.
> This behaviour seems to be normal for me because
> the envi plot is called within the event handler of the base widget.
> The event handler is only called from the base widget. The plot needs
> resources from the base widget e.g. a draw window or something else.
> Then if you destroy the base all is over.
>
> Reimar
>
> --
Hi Reimar,

That's my problem: when I destroy the base widget, all is *not* over. The
ENVI plot persists until I close it manually or until I close the ENVI
session. If that is normal behavior, then I don't understand what the
purpose of the keyword GROUP is in the ENVI_PLOT_DATA procedure.

Mort

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Re: group leader for envi_plot_data [message #40335 is a reply to message #40296]

Mon, 02 August 2004 11:27

R.Bauer
Messages: 1424
Registered: November 1998

Senior Member

Mort Canty wrote:

>
> Sorry, I forgot to ask for help on this one (probably explains why I
> haven't got any yet) .
>
> Thanks
>
> - Mort

Dear Mort

I don't understand what you like to know from us.
This behaviour seems to be normal for me because
the envi plot is called within the event handler of the base widget.
The event handler is only called from the base widget. The plot needs
resources from the base widget e.g. a draw window or something else.
Then if you destroy the base all is over.

Reimar

--
Forschungszentrum Juelich
email: R.Bauer@fz-juelich.de
http://www.fz-juelich.de/icg/icg-i/
============================================================ ======
a IDL library at ForschungsZentrum Juelich
http://www.fz-juelich.de/icg/icg-i/idl_icglib/idl_lib_intro. html

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Re: group leader for envi_plot_data [message #40449 is a reply to message #40302]

Wed, 04 August 2004 00:01

Mort Canty
Messages: 134
Registered: March 2003

Senior Member

Great, Tian. It works for me, too. Many thanks.

Mort

"Y.F. Tian" <tianyf@gmail.com> schrieb im Newsbeitrag
news:d1ba5f20.0408031819.6d7d9070@posting.google.com...
> I think it is the problem of envi_plot_data. I found a solution:
> ...
> envi_plot_data, ..., base=base
> widget_control, base, group_leader=event.top
> ...
>
> That works fine in my test program.
>
> Tian

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