Ibuild example - question. - Thread - go-pugleaf | RockSolid RetroBBS NetNews Server

Thread View: comp.windows.interviews

2 messages

[T] Back to Threads [V] Tree View [G] Group Articles

2 total messages Started by Guy Gascoigne-Piggford Wed, 27 Jan 1993 08:44

Ibuild example - question.

#1586

Author: Guy Gascoigne-Piggford
Date: Wed, 27 Jan 1993 08:44

23 lines
1718 bytes

I'm new to both InterViews and C++ and have build IV 3.1 with g++ on a
Dell SVR4 machine. Regretably this means that I havn't got any
debugger support for c++ since this is missing from the SVR4 version
of g++ :-(

I've been working through the tutorial in the ibuild users guide,
building the Namer example and have run into an irritating problem,
I've related the pushButton instance to the StringEditor instance and
filled in the rest of the Namer::entered() method, but when I run the
program and test it I find that I go through this method TWICE instead
of once, regardless of whether I've pressed return in the string field
or clicked on the entered button.

I've rebuilt this example twice now trying to see what I might have
done that differs from the guide and I've failed to come up with
anything. Can anyone shed any light on this for me, I'd dearly like to
get to grips with this.

-- 
===============================================================================
Guy Gascoigne-Piggford                  | "... and then I said to myself, 'Why
guy@wyrdrune.demon.co.uk                |  should I split it two ways -'"
ggascoigne@cix.compulink.co.uk          |                          - G. MOUSER

Re: Ibuild example - question.

#1576

Author: Alexander Gassmann
Date: Wed, 27 Jan 1993 13:53

44 lines
2459 bytes

In article <1993Jan27.084420.23833@wyrdrune.demon.co.uk>, guy@wyrdrune.demon.co.uk (Guy Gascoigne-Piggford) writes:
|> 
|> I've been working through the tutorial in the ibuild users guide,
|> building the Namer example and have run into an irritating problem,
|> I've related the pushButton instance to the StringEditor instance and
|> filled in the rest of the Namer::entered() method, but when I run the
|> program and test it I find that I go through this method TWICE instead
|> of once, regardless of whether I've pressed return in the string field
|> or clicked on the entered button.

Aaah yes, that sounds very familiar to me. I think it is a timing
problem... When the ButtonState is set to 1, the associated method
is called. But it seems that InterViews calls it twice, once
when the ButtonState is 1, a second time when the ButtonState is
0. To avoid that your method gets called twice, you need to do 
the following thing:

  Give your ButtonState a good name (in IBuild, e.g. ConfirmBS)

  Export the ButtonState from the core class (Check the Export-Box)

  Regenerate the source code of the core class

  In your associated method, you need to do the following things FIRST:

    int ButtonStateValue;
    ConfirmBS->GetValue(ButtonStateValue);
  
    // To make sure that the Dialog shows up only when needed:
    if (ButtonStateValue==0) return;

  At the end of the method, make sure the ButtonState is reset:

    // Now the Button can be reset
    ConfirmBS->SetValue(0);

Since I am quite new to InterViews myself, I am not sure it is the
best method. At least it works :-)

If anybody has a better suggestion, please feel free to correct me.

Hope that will help,

Alexander Gassmann

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads