From: Jason Persampieri <jason@...>
Date: 2002-12-12T03:58:33+09:00
Subject: Re: FXRuby : Setting Default Height/Width in an FXList

> Generally speaking, containers *do* re-evaluate
> their width and height 
> when a child widget is added or removed (... or
> hidden or shown, etc.) 
> If this doesn't seem to be happening you can force a
> widget to 
> recalculate its layout by calling recalc(), e.g.
> 
>      FXLabel.new(aContainer, "myLabel")
>      FXTextField(aContainer, 6)
>      aContainer.recalc
> 
> but as I said this usually isn't necessary.
> 

ok... try this... it shows what I'm talking about. 
When the FXText's are deleted, the scrollbar doesn't
change.

require 'fox'
include Fox

class MyMainWindow < FXMainWindow
	def initialize(app)
		super(app, "Delete Children Test", nil, nil,
DECOR_ALL, 0, 0, 200, 100)

		#layout screen
		button = FXButton.new(self, "Push me.")
		scrollFrame = FXScrollWindow.new(self,
LAYOUT_FILL_X|LAYOUT_FILL_Y)
			@frame = FXVerticalFrame.new(scrollFrame,
FRAME_SUNKEN)
				FXText.new(@frame)
				FXText.new(@frame)
				FXText.new(@frame)
				FXText.new(@frame)
				FXText.new(@frame)
				FXText.new(@frame)
			
		button.connect(SEL_COMMAND, method(:onButton))
	end
	
	def create
		super
		show(PLACEMENT_SCREEN)
	end

	def onButton(sender, sel, item)
		0.upto(@frame.numChildren-1) do |childNum|
			@frame.childAtIndex(childNum).destroy
		end
		@frame.recalc
	end
end

theApp = FXApp.new("Foo")
theApp.init(ARGV)

myWindow = MyMainWindow.new(theApp)

theApp.create
theApp.run