Re: on DrawingArea, pixmap and pixbuf

[David Eduardo Gomez Noguera <davidgn servidor unam mx>]

On Sat, 2002-04-20 at 12:38, Nuno Afonso wrote:
> 
> > that was right. its weird. it didnt show the message if i do the
> > showwidget after gdk_pixmap_new, without need to realize the widget, but
> > it still needs that i realize it if i pass -1 as depth.
> > why would that be?
> 
> GdkPixmap*  gdk_pixmap_new                  (GdkWindow *window,
>                                              gint width,
>                                              gint height,
>                                              gint depth);
> 
> Create a new pixmap with a given size and depth.
> 
> window : a GdkWindow, used to determine default values for the new
> pixmap. Can be NULL if depth is specified,
> width : The width of the new pixmap in pixels.
> height : The height of the new pixmap in pixels.
> depth : The depth (number of bits per pixel) of the new pixmap. If -1,
> and window is not NULL, the depth of the new pixmap will be equal to
> that of window.
> Returns : the GdkPixmap
> 
> http://www.gtk.org/api/
> 
> before you ask some questions you should at least try to give a look at
> the GTK+ Specification... as you see if you pass -1 the depth will be
> the same of the window.
> 

I always do that.
from the API

struct GdkPixmap
{
  gpointer user_data;
};

An opaque structure representing an offscreen drawable. Pointers to
structures of type GdkPixmap, GdkBitmap, and GdkWindow, can often be
used interchangeably. The type GdkDrawable refers generically to any of
these types.