wxruby users - Sep 2008 - Lack of proper expansion using FlexGridSizer

I experienced a problem similar to this using GridBagSizer earlier today
(http://www.ruby-forum.com/topic/164539#new).  The problem was resolved
at that point by using a BoxSizer instead of the GridBagSizer, but now
I''ve run into the same problem with a FlexGridSizer.  In the top half
of
the attached image, I use a  series of horizontal BoxSizers, each with a
StaticText (proportion = 0) and a TextCtrl (proportion = 1).  This fills
up the space nicely, but I want the left sides of the TextCtrls to line
up.  Keeping the BoxSizers and changing the proportions to something
like 1 and 4 instead of 0 and 1 works, but it leaves large gaps between
the label and the textbox when the window is large and lets the textbox
unnecessarily force the labels to wrap when the window is smaller.

Using a FlexGridSizer accomplishes the goal, but the TextCtrls no longer
fill up the available space.  The source looks something like this:

require ''wx''
include Wx

class AddPanel < Panel
  DEFAULT_FIELDS = ["A Label", "Another Label", "A
third label", "And so
on..."]

  def initialize(parent)
    super parent

    @fields = {}
    @field_panels = {}
    @field_labels = {}
    @field_textboxes = {}

    @field_layouts = FlexGridSizer.new 2
    set_sizer @field_layouts

    DEFAULT_FIELDS.each do |label|
      @fields[label] = ''''

      @field_labels[label] = StaticText.new self, :label => label
      @field_textboxes[label] = TextCtrl.new self, :value =>
@fields[label]

      @field_layouts.add @field_labels[label], 0, EXPAND
      @field_layouts.add @field_textboxes[label], 1, LEFT, 4

      ...
    end

    show
  end

  ...
end

In the larger Window, the following code is relevant:

@add_panel = AddPanel.new @parent_panel
...
@option_layout = BoxSizer.new VERTICAL
@option_panel.set_sizer @option_layout
...
@option_layout.add @add_panel, 1, EXPAND
@add_panel.show
...
@option_layout.layout

Any suggestions?  The only other option I can think of is to use a
single horizontal BoxSizer with two vertical BoxSizers inside--one with
all of the StaticTexts on the left, and the other with all of the
TextCtrls on the right.  This could potentially cause mis-alignment
between the labels and their corresponding fields (if a label gets
forced to wrap), though, so I''d rather avoid it.

Thanks,
Doug

Attachments:
http://www.ruby-forum.com/attachment/2641/expand-vs-lineup.jpg

-- 
Posted via http://www.ruby-forum.com/.

Doug Glidden wrote:
> I experienced a problem similar to this using GridBagSizer earlier today
> (http://www.ruby-forum.com/topic/164539#new).  The problem was resolved
> at that point by using a BoxSizer instead of the GridBagSizer, but now
> I''ve run into the same problem with a FlexGridSizer.  In the top
half of
> the attached image, I use a  series of horizontal BoxSizers, each with a
> StaticText (proportion = 0) and a TextCtrl (proportion = 1).  This fills
> up the space nicely, but I want the left sides of the TextCtrls to line
> up. 
>   
...
> Any suggestions? 
FlexGridSizer is the right type of sizer for that sort of layout.

Maybe look at FlexGridSizer#add_growable_col ?

http://wxruby.rubyforge.org/doc/flexgridsizer.html#FlexGridSizer_addgrowablecol

alex

Alex Fenton wrote:
[snip]
> Maybe look at FlexGridSizer#add_growable_col ?
[snip]

Alex,

Thanks, that (combined with using the EXPAND flag when adding 
@field_textboxes[label] to @field_layouts) did the trick.

Doug
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