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Re: WIDGETS [message #2888 is a reply to message #2717]

Thu, 01 September 1994 14:03

peter
Messages: 80
Registered: February 1994

Member

Joseph M Zawodny (zawodny@arbd0.larc.nasa.gov) wrote:
: No, no, no! You should avoid using common blocks in widget programming. I
: sense and desense widgets of all sorts routinely. My personal preference
: is to create a structure with one of the fields set to be a long integer
: array and I store the widget id's of the widgets I need to manipulate or
: (de)sensitize in this array (the structure is required only if you need to
: pass other data besides the widget id's). That way a simple

: widget_control,event.id,get_uvalue=array

But how do you sensitize/desensitize a widget that you didn't get an
event from? Suppose I perform an action that requires, say, the fields
in another base widget to change. I have to have their widget IDs, so
I need a common block, unless I store all of them in the uvalue of
every widget that might require them to change (which seems a little hard to
maintain (ah, the quick and dirty programming thread again!)).

: statement gets the info I need without using common blocks. The problem is
: that you might have multiple versions of the same widget running
: concurrently. If you do and use common blocks to pass data between
: widgets, the common blocks can (and do) get scrambled.

This is a problem -- I've only ever written applications where unique
instances of widgets are allowed, in which case a common block to hold
widget IDs, and another one to hold the panel state (i.e. the values of
variables that affect that panel) seems to work very well indeed.

Peter

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[Message index]

		WIDGETS By: mallozzi on Tue, 30 August 1994 10:23
		Re: Widgets By: rivers on Thu, 22 September 1994 21:05
		Re: Widgets By: rouse on Sun, 18 September 1994 23:50
		Re: WIDGETS By: peter on Thu, 01 September 1994 14:03
		Re: WIDGETS By: zawodny on Thu, 01 September 1994 10:30
		Re: WIDGETS By: sjt on Thu, 01 September 1994 05:07
		Re: Widgets By: offenbrg on Wed, 07 February 1996 00:00
		Re: Widgets By: todd on Wed, 07 February 1996 00:00
		Re: Widgets By: davidf on Sun, 03 October 1999 00:00
		Re: Widgets By: Liam Gumley on Fri, 01 October 1999 00:00
		Re: Widgets By: Richard G. French on Thu, 07 October 1999 00:00
		Re: Widgets By: mgs on Wed, 06 October 1999 00:00
		Re: Widgets By: Robert LeeJoice on Wed, 06 October 1999 00:00
		Re: Widgets By: Richard G. French on Sun, 10 October 1999 00:00
		Re: Widgets By: davidf on Sat, 09 October 1999 00:00
		Re: widgets By: davidf on Fri, 18 August 2000 00:00
		Re: Widgets By: Rick Towler on Thu, 30 May 2002 08:11
		Re: Widgets By: David Fanning on Wed, 29 May 2002 11:24
		Re: widgets By: David Fanning on Fri, 19 August 2005 08:02

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