Re: Where should I put these code?

[Steve Lawrence <kfjethro gmail com>]

chunlong84 wrote:
>  For efficiency,i don't want put these codes in MyDrawingArea::on_expose_event().
> I need a fixed size window,so i only need execute these code once,not every time.
> but i still cann't put them in construction method,where should i put them?
>
> 	allocation=get_allocation();     //allocation,cr,gc are data members of MyDrawingArea:public Gtk::DrawingArea
> 	cr = get_window()->create_cairo_context();   
>    	gc=Gdk::GC::create(get_window()); 
>   

Put the code in your signal_configure_event() and signal_map_event() 
handlers of your MyDrawingArea class.
The gc=Gdk::create()... can probably just go in your signal_map_event() 
handler.