fxruby users - Jan 2008 - Problem with FXSwitcher

Hello,

I''m writing my first FXRuby program (with the help of Lyle Johnsons
Pragmatic book, thanks) and I''ve got a little problem with the
FXSwitcher.
I''ve got a form and a picture. When the user opens a new picture, I
want to
reload the form (so every picture has one form). This works, FXSwitcher
fires a message and I can react. But if the switcher is empty (when the
program starts) and I add the first picture to it, it doesn''t fire.
Why? And
if it''s impossible to do it my way, how can I fire a message manually?

Thanks for helping
Tobias Schmidt
-- 
View this message in context:
http://www.nabble.com/Problem-with-FXSwitcher-tp14771533p14771533.html
Sent from the FXRuby Users mailing list archive at Nabble.com.

On Jan 12, 2008, at 5:21 AM, Grobie wrote:
> I''m writing my first FXRuby program (with the help of Lyle
Johnsons
> Pragmatic book, thanks) and I''ve got a little problem with the  
> FXSwitcher.
> I''ve got a form and a picture. When the user opens a new picture,
I
> want to
> reload the form (so every picture has one form). This works,  
> FXSwitcher
> fires a message and I can react. But if the switcher is empty (when  
> the
> program starts) and I add the first picture to it, it doesn''t
fire.
> Why? And
> if it''s impossible to do it my way, how can I fire a message
manually?
Tobias,

The switcher only fires a SEL_COMMAND message when the index of its  
current window is changed from one child window to another. So for  
example if you are currently showing panel 2, and then you change to  
panel 3, it should fire SEL_COMMAND. However, merely adding a window  
to a switcher doesn''t cause this index to change (nor does removing a  
window from the switcher).

If you''re wanting to fire a SEL_COMMAND every time a new panel is  
added to the switcher, you''d need to do something manually, e.g.

	switcher = FXSwitcher.new(...)
	...
	new_panel = FXVerticalFrame.new(switcher, ...)
	switcher.setCurrent(switcher.numChildren -1, true)

Hope this helps,

Lyle

Thanks for your reply. I think, I forgot something to explain. If the  
user adds a picture to the program (like the example in your book),  
this picture is added to the switcher and set as the current item.  
This is an excerpt of my code.

class CardList < FXSwitcher
    def initialize(parent)
     super(...)
     @cards = []
   end

   def add_card(card)
     @cards << card
     PictureView.new self, card
     self.setCurrent @cards.size-1, true
   end

   ...

end

When I initialize the CardList, current is already set to 0. When I  
add the first picture, current is still 0. How can I fire a  
SEL_COMMAND at this point?

Thank you
Tobias


Am 12.01.2008 um 13:02 schrieb Lyle Johnson:
>
> On Jan 12, 2008, at 5:21 AM, Grobie wrote:
>
>> I''m writing my first FXRuby program (with the help of Lyle
Johnsons
>> Pragmatic book, thanks) and I''ve got a little problem with the
>> FXSwitcher.
>> I''ve got a form and a picture. When the user opens a new
picture, I
>> want to
>> reload the form (so every picture has one form). This works,
>> FXSwitcher
>> fires a message and I can react. But if the switcher is empty (when
>> the
>> program starts) and I add the first picture to it, it doesn''t
fire.
>> Why? And
>> if it''s impossible to do it my way, how can I fire a message  
>> manually?
>
> Tobias,
>
> The switcher only fires a SEL_COMMAND message when the index of its
> current window is changed from one child window to another. So for
> example if you are currently showing panel 2, and then you change to
> panel 3, it should fire SEL_COMMAND. However, merely adding a window
> to a switcher doesn''t cause this index to change (nor does
removing a
> window from the switcher).
>
> If you''re wanting to fire a SEL_COMMAND every time a new panel is
> added to the switcher, you''d need to do something manually, e.g.
>
> 	switcher = FXSwitcher.new(...)
> 	...
> 	new_panel = FXVerticalFrame.new(switcher, ...)
> 	switcher.setCurrent(switcher.numChildren -1, true)
>
> Hope this helps,
>
> Lyle
> _______________________________________________
> fxruby-users mailing list
> fxruby-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/fxruby-users