comp.lang.idl-pvwave archive: archive » textbox value on destroy?

Home » Public Forums » archive » textbox value on destroy?

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: textbox value on destroy? [message #28706 is a reply to message #28622]

Fri, 04 January 2002 08:32

btt
Messages: 345
Registered: December 2000

Senior Member

Gert Van de Wouwer wrote:

>
> yep, thats the obvious thing. Unfortunately, I cannot figure out WHEN to do
> this in the case that the user closes the apllication.

You can always make the value of the text box a returned keyword value. You
will need to set up an event handler that will store the value of the text
field somewhere in the top level base's uValue as a pointer. Anytime the user
modifies the text object, the event handler will store its value in the TLB's
uvalue. After the widget portion of the application is destroyed, the pointer
reference still exists and the value it points to can be retrieved.

I'm a bit rusty with this stuff and you will probably find a much better
example on David's webpage.

PRO MyApp, TheText = TheText

If n_elements(TheText) EQ 0 Then TheText = ''
TxtPtr = Ptr_new(TheText)

tlb = widget_base(.....)
build gui here

Info = {TxtPtr:TxtPtr, other things here too}

Widget_Control, tlb, set_Uvalue = info, /no_copy

XMANAGER, .....

TheText = *TxtPtr ;<----- get the value from the pointer
Ptr_Free, TxtPtr ;<---- free the pointer

Return
END

Later....

I just looked at http://www.dfanning.com/programs/textbox.pro and this is
indeed a much better example.

Ben

--
Ben Tupper
Bigelow Laboratory for Ocean Science
180 McKown Point Road
West Boothbay Harbor, ME 04575
www.bigelow.org
btupper@bigelow.org

Report message to a moderator

[Message index]

		textbox value on destroy? By: Gert Van de Wouwer on Thu, 03 January 2002 02:51
		Re: textbox value on destroy? By: Pavel A. Romashkin on Fri, 04 January 2002 08:39
		Re: textbox value on destroy? By: btt on Fri, 04 January 2002 08:32
		Re: textbox value on destroy? By: Gert Van de Wouwer on Fri, 04 January 2002 07:38
		Re: textbox value on destroy? By: Ben Tupper on Thu, 03 January 2002 18:37

Previous Topic:	Windows XP problems
Next Topic:	Re: Two-page PostScript output

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Thu Oct 09 21:05:43 PDT 2025

Total time taken to generate the page: 0.80158 seconds