wxruby users - Jan 2007 - Adding sizers to other sizers doesn''t work

Hello all,

Running this on an Intel Mac
OSX 10.4.8
ruby 1.8.4 (2005-12-24) [i686-darwin]
wxruby2-preview (0.0.37)
using zshell

I''m having a heck of a time setting up a GUI with a differing number of
widgets per row, resulting in a differing number or widgets per column.
At first I tried to simply do something like the following:

class CharacterInfoPanel < Wx::Panel
  def initialize(parent)
    super(parent)
    sizer = Wx::BoxSizer.new(Wx::VERTICAL)
    set_sizer(sizer)

    row = Wx::Panel.new(self,-1)
    row_sizer = Wx::BoxSizer.new(Wx::HORIZONTAL)
    row.set_sizer(row_sizer)
    row_sizer.add(Wx::StaticText.new(self, -1, "Character Name"))
    row_sizer.add(Wx::Panel.new(self,-1, Wx::DEFAULT_POSITION, Wx::Size.new
(10,1)))
    row_sizer.add(Wx::StaticText.new(self, -1, "Player Name"))
    sizer.add(row_sizer)

    row = Wx::Panel.new(self,-1)
    row_sizer = Wx::BoxSizer.new(Wx::HORIZONTAL)
    row.set_sizer(row_sizer)
    character_name_text = Wx::TextCtrl.new(self, -1)
    row_sizer.add(character_name_text)
    player_name_text = Wx::TextCtrl.new(self, -1)
    row_sizer.add(player_name_text)
    sizer.add(row_sizer)
end

(I know adding the rows is ugly, but I''m not bothering
''ruby-izing'' this
until I figure this crap out.)
This certainly produces the results I want, however when I quit the
application I seem to be getting some rather strange errors.
1)
gm_aid.rb:35: [BUG] Bus Error
ruby 1.8.4 (2005-12-24) [i686-darwin]

zsh: abort      ruby gm_aid.rb

2)
zsh: illegal hardware instruction  ruby gm_aid.rb


Okay so then I decided to take a different approach, to see if things would
work. I tried this without adding sizers to other sizers like so:
class CharacterInfoPanel < Wx::Panel
  def initialize(parent)
    super(parent)
    sizer = Wx::BoxSizer.new(Wx::VERTICAL)
    set_sizer(sizer)

    row = Wx::Panel.new(self,-1)
    row_sizer = Wx::BoxSizer.new(Wx::HORIZONTAL)
    row.set_sizer(row_sizer)
    row_sizer.add(Wx::StaticText.new(self, -1, "Character Name"))
    row_sizer.add(Wx::Panel.new(self,-1, Wx::DEFAULT_POSITION, Wx::Size.new
(10,1)))
    row_sizer.add(Wx::StaticText.new(self, -1, "Player Name"))
    sizer.add(row)

    row = Wx::Panel.new(self,-1)
    row_sizer = Wx::BoxSizer.new(Wx::HORIZONTAL)
    row.set_sizer(row_sizer)
    character_name_text = Wx::TextCtrl.new(self, -1)
    row_sizer.add(character_name_text)
    player_name_text = Wx::TextCtrl.new(self, -1)
    row_sizer.add(player_name_text)
    sizer.add(row)
end

Am I crazy to think this should work?
Well, so when I quit the app I get no errors...however, it certainly
doesn''t
set up my world like I expect.
It seems when you do this, whenever you add a row, it simply clobbers the
old row. So my static texts aren''t even showing up, just my text
controls...in the first row.
It does seem to add a second row, but the row is completely blank.
So if I were to copy setting up the two rows and paste it a few times,
I''d
still only wind up with one row with any actual controls in it...and then
several blank rows.

Anyone have any ideas here? This is driving me up the wall...and down the
other side.


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On a side note, just upgraded to wxruby2-preview 0.0.38 (i686-darwin8.4.1)
and still getting the same behavior.
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Hi Chris

> I''m having a heck of a time setting up a GUI with a differing
number
> of widgets per row, resulting in a differing number or widgets per 
> column.
Yep, sizers are flexible but a bit tricky.
> At first I tried to simply do something like the following:
You''re very close, but you''ve added extra panels into the
hierarchy
where they''re not needed. If you''re nesting sizers, just add
the
subordinate (horiz) sizer directly to the parent (vert) one. The sub 
sizer doesn''t need to be associated with a
Wx::Window.
> class CharacterInfoPanel < Wx::Panel
>   def initialize(parent)
>     super(parent)
>     sizer = Wx::BoxSizer.new(Wx::VERTICAL)
>     set_sizer(sizer)
>    
>     row = Wx::Panel.new(self,-1)
delete this
>     row_sizer = Wx::BoxSizer.new(Wx::HORIZONTAL)
>     row.set_sizer(row_sizer)
and this
>     row_sizer.add(Wx::StaticText.new(self, -1, "Character Name"))
>     row_sizer.add(Wx:: Panel.new(self,-1, Wx::DEFAULT_POSITION, 
> Wx::Size.new(10,1)))
>     row_sizer.add(Wx::StaticText.new(self, -1, "Player Name"))
>     sizer.add(row_sizer)
>
>     row = Wx::Panel.new(self,-1)
and this
>     row_sizer = Wx:: BoxSizer.new(Wx::HORIZONTAL)
>     row.set_sizer(row_sizer)
and this
>     character_name_text = Wx::TextCtrl.new(self, -1)
>     row_sizer.add(character_name_text)
>     player_name_text = Wx::TextCtrl.new(self, -1)
>     row_sizer.add(player_name_text)
>     sizer.add(row_sizer)
> end
With those four lines removed it works for me.

It doesn''t segfault for me on exit using 0.0.38 - there are some
similar
other bugs now fixed in SVN head causing crash-on-exit so please do 
report these.

Note that to space out widgets within sizers, you can give a numeric 
fourth argument to Sizer#add to put pixel spacing around members, or 
alternately use Sizer#insert_spacer.
> (I know adding the rows is ugly, but I''m not bothering
''ruby-izing''
> this until I figure this crap out.)
Yep. You might want to take a look at wxSugar which has a specific 
module for making working with nested sizers less verbose:

panel = Wx::Panel.new(self)

panel.arrange_horizontally(:padding => 4) do
  panel.add(Wx::StaticText[:label => ''Character Name''])
  panel.add(Wx::StaticText[:label => ''Player Name''])
end

panel.arrange_horizontally(:padding => 4) do
  player_name_txt = panel.add(Wx::TextCtrl)
  char_name_txt = panel.add(Wx::TextCtrl)
end

hth
alex

Alex,

Thanks a bunch...works like a charm now.
WxSugar is rockin'' like Dokken too.

So what''s your advice for setting up a GUI with several widgets
spanning
more than one row or column?
Always struggled with this layout in Java, seems as though I''m destined
to
struggle with it in Ruby as well.

Anyhow, thanks for the advice thus far.
Chris


On 1/22/07, Alex Fenton <alex at pressure.to>
wrote:
>
> Hi Chris
>
>
> > I''m having a heck of a time setting up a GUI with a differing
number
> > of widgets per row, resulting in a differing number or widgets per
> > column.
> Yep, sizers are flexible but a bit tricky.
> > At first I tried to simply do something like the following:
> You''re very close, but you''ve added extra panels into the
hierarchy
> where they''re not needed. If you''re nesting sizers, just
add the
> subordinate (horiz) sizer directly to the parent (vert) one. The sub
> sizer doesn''t need to be associated with a Wx::Window.
> > class CharacterInfoPanel < Wx::Panel
> >   def initialize(parent)
> >     super(parent)
> >     sizer = Wx::BoxSizer.new(Wx::VERTICAL)
> >     set_sizer(sizer)
> >
> >     row = Wx::Panel.new(self,-1)
> delete this
> >     row_sizer = Wx::BoxSizer.new(Wx::HORIZONTAL)
> >     row.set_sizer(row_sizer)
> and this
> >     row_sizer.add(Wx::StaticText.new(self, -1, "Character
Name"))
> >     row_sizer.add(Wx:: Panel.new(self,-1, Wx::DEFAULT_POSITION,
> > Wx::Size.new(10,1)))
> >     row_sizer.add(Wx::StaticText.new(self, -1, "Player
Name"))
> >     sizer.add(row_sizer)
> >
> >     row = Wx::Panel.new(self,-1)
> and this
> >     row_sizer = Wx:: BoxSizer.new(Wx::HORIZONTAL)
> >     row.set_sizer(row_sizer)
> and this
> >     character_name_text = Wx::TextCtrl.new(self, -1)
> >     row_sizer.add(character_name_text)
> >     player_name_text = Wx::TextCtrl.new(self, -1)
> >     row_sizer.add(player_name_text)
> >     sizer.add(row_sizer)
> > end
> With those four lines removed it works for me.
>
> It doesn''t segfault for me on exit using 0.0.38 - there are some
similar
> other bugs now fixed in SVN head causing crash-on-exit so please do
> report these.
>
> Note that to space out widgets within sizers, you can give a numeric
> fourth argument to Sizer#add to put pixel spacing around members, or
> alternately use Sizer#insert_spacer.
> > (I know adding the rows is ugly, but I''m not bothering
''ruby-izing''
> > this until I figure this crap out.)
> Yep. You might want to take a look at wxSugar which has a specific
> module for making working with nested sizers less verbose:
>
> panel = Wx::Panel.new(self)
>
> panel.arrange_horizontally(:padding => 4) do
>   panel.add(Wx::StaticText[:label => ''Character
Name''])
>   panel.add(Wx::StaticText[:label => ''Player Name''])
> end
>
> panel.arrange_horizontally(:padding => 4) do
>   player_name_txt = panel.add(Wx::TextCtrl)
>   char_name_txt = panel.add(Wx::TextCtrl)
> end
>
> hth
> alex
>
> _______________________________________________
> wxruby-users mailing list
> wxruby-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/wxruby-users
>
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Chris Thiel wrote:
> So what''s your advice for setting up a GUI with several widgets 
> spanning more than one row or column?
You can nest sizers containing widgets to any depth you like, and that 
will let you create most ''spanning'' type layouts. Just

With wxSugar:

arrange_horizontally do
  # a single long widget here, spanning two columns
end

arrange_horizontally do
  # a half-width widget
  # another half-width widget
end

Use the :proportion argument to add to tell widgets to grow and shrink 
as the container grows and shrinks.

See also:
http://rubyforge.org/pipermail/wxruby-users/2006-February/001902.html
> Always struggled with this layout in Java, seems as though I''m 
> destined to struggle with it in Ruby as well.
I wouldn''t be so pessimistic - this is fairly straightforward once 
you''ve got the hang of it.

There''s also GridBagSizer which isn''t yet available in wxruby,
but I
expect we can add it to an upcoming release.

alex