fxruby users - Nov 2008 - Dynamic generation of a (sub) layout

Hi,

first of all - I''m relatively unexpierienced with GUI programming in
general
and with FXRuby in particular.
I''ve managed to write a little FXRuby app that animates some data
I''ve
collected. I made really good progress for a while, but now I''m stuck
with
the following problem.

My data is read from file and can have a varying number of elements,
depending on the file.
I want to be able to turn on and off each of the elements individually by
means of check-buttons.
I therefore created a frame that contains a matrix of check-buttons, one for
each element. This frame therefore has to be recreated every time a new file
gets loaded.

Below is a simplified version of what I''ve been trying to do.
At the moment the layout works fine the first time around (currently
I''ve
hard-coded to load a specific file at startup, this will change later).
However when I try to open another file, the content of @selectUVFrame
disappears - nothing is displayed. I''ve inspected the children of
@selectUVFrame and they all seem to be there, except I can''t see them.
If I
leave out the first line (	@selectUVFrame.each_child{|c|
@selectUVFrame.removeChild(c)}) the list of children of @selectUVFrame
grows, but again I can''t see the new ones (and the layout
get''s corrupted,
too).

I seem to miss some basic understanding here and couldn''t find any hint
of
what I''m doing wrong.

Thanks for any help,
Armin



@selectUVFrame is of type FXVerticalFrame and is itself a child of another
frame.


def generateUVSelectors
	@selectUVFrame.each_child{|c| @selectUVFrame.removeChild(c)}

	FXButton.new(@selectUVFrame, "&Clear All", nil, nil,
0,).connect(SEL_COMMAND){
	  @selectedUVs.each{|cb| cb.setCheck(false)}
	  drawScene
	}

	FXButton.new(@selectUVFrame, "&Set All", nil, nil,
0).connect(SEL_COMMAND){
	  @selectedUVs.each{|cb| cb.setCheck(true)}
	  drawScene
	}

	selectMatrix = FXMatrix.new(@selectUVFrame, 4, MATRIX_BY_COLUMNS)
	@selectedUVs = []

	uvs.length.times{|i|
		@selectedUVs << FXCheckButton.new(selectMatrix, i.to_s, nil, 0){ |cb|
			cb.setCheck(true)
		}
		@selectedUVs[-1].connect(SEL_COMMAND, method(:onSelectUV))
	}
	
    @selectUVFrame.recalc
end
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Hi again,

after digging a bit deeper I found the missing link here:
http://www.nabble.com/deleting-children-and-then-adding-new-ones-to14247201.html#a14256259

The problem was that I didn''t call create on the newly created buttons.

I''ve modified my code as shown below and this seems to work.
Note however that I had to add an additional variable @windowIsLive
that''s
initialized to false at the start and gets set to true after the show
command in my window-class''s create function. Is there a more elegant
way to
handle this (for example by querying the @selectUVFrame''s status)?

Thanks,
Armin

def generateUVSelectors
	@selectUVFrame.each_child{|c| @selectUVFrame.removeChild(c)}

	b1 = FXButton.new(@selectUVFrame, "&Clear All", nil, nil, 0,)
        b1.connect(SEL_COMMAND){
	  @selectedUVs.each{|cb| cb.setCheck(false)}
	   drawScene
	 }
         b1.create if @windowIsLive


	b2 = FXButton.new(@selectUVFrame, "&Set All", nil, nil, 0)
        b2.connect(SEL_COMMAND){
	  @selectedUVs.each{|cb| cb.setCheck(true)}
	   drawScene
	 }
        b2.create if @windowIsLive


	selectMatrix = FXMatrix.new(@selectUVFrame, 4, MATRIX_BY_COLUMNS)
        selectMatrix.create if @windowIsLive

	@selectedUVs = []

	uvs.length.times{|i|
		@selectedUVs << FXCheckButton.new(selectMatrix, i.to_s, nil, 0){ |cb|
			cb.setCheck(true)
		}
		@selectedUVs[-1].connect(SEL_COMMAND, method(:onSelectUV))
                @selectedUVs[-1].create if @windowIsLive
	}
	
    @selectUVFrame.recalc
end


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On Fri, Nov 21, 2008 at 10:34 PM, Armin Armbruster
<aarmbruster at ndigital.com> wrote:
> Is there a more elegant way to handle this (for example by querying the
@selectUVFrame''s status)?
@selectUVFrame.created? should return true if it has already been created.

Hope this helps,

Lyle

On Mon, Nov 24, 2008 at 1:12 PM,  <aarmbruster at ndigital.com> wrote:
> I''ve been on ruby forum (www.ruby-forum.com) for a few years now
and I actually tried to get into FXRuby a few years back...
> Only recently did I find the Nabble forums which are obviously much more
active, at least when it comes to FXRuby.
> Why are there two forums rather than one?
Armin,

I don''t manage any "forums" associated with FXRuby. There is
an
fxruby-users mailing list, information about which can be found on
this page:

    http://www.fxruby.org/community.html

The fxruby-users mailing list is the *only* one that I monitor
regularly (well, that and foxgui-users). I also try to respond when
someone asks an FXRuby-related question on the ruby-talk mailing list,
but I don''t always catch those.

Web sites like nabble.com and ruby-forum.com are mirrors, of a sort,
for the fxruby-users mailing list (and other mailing lists), but I
don''t have anything to do with those sites. If ruby-forum.com is for
some reason out of sync with this mailing list, you must take that up
with whoever''s in charge of that web site.

Hope this helps,

Lyle