Re: drawing graphics

[Olexiy Avramchenko <ath beast stu cn ua>]

CAVEY GERARD wrote:

> yo all
> About back pixmap i have a  question, i did all u told and now it works like
>
> a Ferrari engine :D
> however each time i want to set a new back pixmap i write these few lines
>
> GdkPixmap *pixmap = NULL;
>
> w=(GtkWidget*)gtk_object_get_data(GTK_OBJECT(((Formulaire*)data)->GetMainWin
> dow()),"drawingarea1");
> pixmap=gdk_pixmap_new (w->window,
> w->allocation.width,w->allocation.height,-1);
> ...
> //here i draw onto pixmap
> ...
> gdk_window_set_back_pixmap(w->window,pixmap,0);
>
> thus i think it s a bit dirty... because i don t clear the previous drawing
> area back buffer!!
> how can i get a pointer to that back buffer 
> i know i could use a global variable but...
> ; i didn t find gdk_window_get_back_pixmap  :P
> any idea? 
Will gdk_window_set_user_data(), gdk_window_get_user_data() help in case 
of gtk+-1.2 ?

Olexiy