wxruby users - Jan 2004 - The flicker of the status bar.

Hi, all!

I''ve just started to use wxruby under Win2K. I didn''t use
wxWindows
earlier. Can anybody explain why the status bar flickers at the top (!)
of the frame when I resize the frame and how to avoid this?
(the following code is the simplest example)

#-----------------------------------
require ''wxruby''
include Wx

class RbApp < App
  def on_init
    frame = MyFrame.new("Test status bar flicker")
    frame.show(TRUE)
  end
end

class MyFrame < Frame
  def initialize(title)
    super( nil,-1,title, DEFAULT_POSITION, DEFAULT_SIZE,
       DEFAULT_FRAME_STYLE | CLIP_CHILDREN | NO_FULL_REPAINT_ON_RESIZE )
    
    @status_bar = create_status_bar(3)
    set_status_bar( @status_bar )
  end
end

a = RbApp.new
a.main_loop
#-------------------------------------

Thanks for any answer in advance.
-- 
Pavel.
mailto:papushev@inp.nsk.su

Hi, wxruby users!

I wrote today:
> ... [skip]. Can anybody explain why the status bar flickers at the
> top (!) of the frame when I resize the frame and how to avoid this?
> (the following code is the simplest example)
> 
> #-----------------------------------
> require ''wxruby''
> include Wx
> 
> class RbApp < App
>   def on_init
>     frame = MyFrame.new("Test status bar flicker")
>     frame.show(TRUE)
>   end
> end
> 
> class MyFrame < Frame
>   def initialize(title)
>     super( nil,-1,title, DEFAULT_POSITION, DEFAULT_SIZE,
>        DEFAULT_FRAME_STYLE | CLIP_CHILDREN | NO_FULL_REPAINT_ON_RESIZE )
>     
>     @status_bar = create_status_bar(3)
>     set_status_bar( @status_bar )
>   end
> end
> 
> a = RbApp.new
> a.main_loop
> #-------------------------------------
It seems that the problem is in the function create_status_bar().
To avoid this flicker of the status bar under the frame''s title
one can use:

    @status_bar = StatusBar.new(self, -1)
    @status_bar.set_fields_count( 3 )
    set_status_bar( @status_bar )

instead of:

    @status_bar = create_status_bar(3)

( of course, "set_status_bar( @status_bar )" in my first message
  is absolutely unnecessary after "@status_bar = create_status_bar(3)"
)

Could anybody say why create_status_bar() causes this flicker ?
  
-- 
Best regards,
Pavel
mailto:papushev@inp.nsk.su

Pavel A. Papushev wrote:
>>... [skip]. Can anybody explain why the status bar flickers at the
>>top (!) of the frame when I resize the frame and how to avoid this?
Very strange. I ran the code on my Linux box, and couldn''t see any 
flicker. So it seems to be Windows-specific.

I looked at the wxRuby code for create_status_bar, and it seems to be 
passing everything through to wxWindows correctly.

So it seems to be a quirk of wxWindows itself. I''m glad you found a 
workaround.

Kevin