gtk_widget_queue_draw() / gtk_widget_size_request()

[Peter Lerner <peter lerner bnbt de>]

hi,

i've read a lot of gtk+ documentation, and tried to read into
the source-code, but i still miss to get what those functions 
are exactly for and how they interact ...

- gtk_widget_queue_draw()

  can someone explain queue-drawing and how the merging of
  areas really works? when do i need to call this function?
  what does it do?

- gtk_widget_size_request()/gtk_widget_real_size_request()
  
  when does a size_request signal get emitted and what is 
  it exactly good for? when do i have to use 
  gtk_widget_size_request() myself?


it would be nice if someone could shed a little light 
on my darkness .... ;-)

thanks a lot in advance ...

mfg
peter lerner
-- 
There is no spoon!   
             - Neo, The Matrix