card layout issue

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4 total messages Started by dingfelder Tue, 19 Jul 2005 03:19

#488

Author: dingfelder
Date: Tue, 19 Jul 2005 03:19

18 lines
1451 bytes

I am having an issue where i create a card layout, and my show metho sometimes does not work

         JPanel cardPanel = new JPanel();
         CardLayout cards = new CardLayout();

In jbinit, I do:
         cardPanel.setLayout(cards);
         cardPanel.add(panel1, "First");
         cardPanel.add(panel2, "Second");
         cardPanel.add(panel3, "Third");
         cards.show(cardPanel, "First");

in the code, in the action for a particular button, I do

         cards.show(cardPanel, "First");

Why would this show method work at one point in the program but not later?

Re: card layout issue

#489

Author: dingfelder
Date: Tue, 19 Jul 2005 03:22

26 lines
1789 bytes

Forget I asked.  I misspelled the card panel string.

It seems that the card panel does not complain if you call show for a nonexistant card :(

Seems like it should throw an exception if you pass it a bad card name`.

"dingfelder" <dingfelder_nospam@sirtrack.com> wrote:
>
>I am having an issue where i create a card layout, and my show metho sometimes does not work
>
>         JPanel cardPanel = new JPanel();
>         CardLayout cards = new CardLayout();
>
>In jbinit, I do:
>         cardPanel.setLayout(cards);
>         cardPanel.add(panel1, "First");
>         cardPanel.add(panel2, "Second");
>         cardPanel.add(panel3, "Third");
>         cards.show(cardPanel, "First");
>
>in the code, in the action for a particular button, I do
>
>         cards.show(cardPanel, "First");
>
>Why would this show method work at one point in the program but not later?

Re: card layout issue

#492

Author: Lori M Olson [TeamB]
Date: Tue, 19 Jul 2005 14:26

31 lines
1836 bytes

dingfelder wrote:
> Forget I asked.  I misspelled the card panel string.
> 
> It seems that the card panel does not complain if you call show for a
> nonexistant card :(
> 
> Seems like it should throw an exception if you pass it a bad card
> name`.
> 

CardLayout has been around since Java 1.0.x.  It's always worked that 
way.  If they changed it now, it would break a lot of old code.

-- 

Regards,

Lori Olson [TeamB]

------------

Save yourself, and everyone else, some time and search the
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Re: card layout issue

#504

Author: dingfelder
Date: Thu, 21 Jul 2005 01:28

40 lines
1998 bytes

I agree.
I'm not suggesting they change it, just that it was poor design to start with 

:)

Cheers !

"Lori M Olson [TeamB]" <javadragon@techie.com> wrote:
>dingfelder wrote:
>> Forget I asked.  I misspelled the card panel string.
>> 
>> It seems that the card panel does not complain if you call show for a
>> nonexistant card :(
>> 
>> Seems like it should throw an exception if you pass it a bad card
>> name`.
>> 
>
>CardLayout has been around since Java 1.0.x.  It's always worked that 
>way.  If they changed it now, it would break a lot of old code.
>
>-- 
>
>Regards,
>
>Lori Olson [TeamB]
>
>------------
>
>Save yourself, and everyone else, some time and search the
>newsgroups and the FAQ-O-Matic before posting your next
>question.
>
>Google Advanced Newsgroup Search
>     http://www.google.ca/advanced_group_search
>Other Newsgroup Searches:
>     http://www.borland.com/newsgroups/ngsearch.html
>Joi Ellis's FAQ-O-Matic:
>     http://www.visi.com/~gyles19/fom-serve/cache/1.html

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