Re: [GTK +] Problem with Pixmap

["porte cyril" <porte_cyril noos fr>]

That is the solution,

I really thank you,

Cyril Porte
----- Original Message -----
From: "John Cupitt" <john cupitt ng-london org uk>
To: "porte cyril" <porte_cyril noos fr>
Cc: <gtk-list gnome org>
Sent: Wednesday, March 07, 2001 1:07 PM
Subject: Re: [GTK +] Problem with Pixmap


> porte cyril wrote:
> > void Affiche_Pixmap(GtkWidget *top_level_window,struct struct_outil
> > *outil)
> > {
> > // top_level_window is the widget of my GTK_WINDOW_TOPLEVEL
> > // struct_outil is a structure for some of my widget
> > GtkStyle *style;
> > GdkPixmap *pixmap;
> > GdkBitmap *mask;
> > GtkWidget *my_pixmap;
> >
> > style = gtk_widget_get_style(top_level_window);
> > pixmap =
> >
gdk_pixmap_create_from_xpm(top_level_window->window,&mask,&style->bg[GTK_STA
TE_NORMAL],
> > "./PIXMAPS/Machine.OK.xpm");
> > my_pixmap = gtk_pixmap_new(pixmap,mask);
> > gtk_container_add (GTK_CONTAINER (outil->bouton.image_frame),
> > my_pixmap);
> > gtk_widget_show (my_pixmap);
> > }
>
> Hi Cyril, the problem is that your top_level_window is not realised when
> you call gdk_pixmap_create_from_xpm(), so it has no underlying X window
> yet, and no colormap.
>
> I get around this problem by having an invisible top-level window for my
> application. In main(), just after gtk_init(), I do:
>
>         GtkWidget *main_window = gtk_window_new( GTK_WINDOW_TOPLEVEL );
>         gtk_widget_realize( main_window );
>         GdkWindow *main_window_gdk = main_window->window;
>
> Then anywhere in my app I can do:
>
> GdkPixmap *px =
_pixmap_create_from_xpm_d( 
>   main_window_gdk, &mask, NULL, blah_xpm );
> GtkPixmap *my_pixmap = gtk_pixmap_new( px, mask );
> 
> without having to worry about whether my windows are realised. There's
> probably a better way :-)
> 
> HTH, John
> -- 
> John Cupitt, john cupitt ng-london org uk, +44 (0)20 7747 2570
> VASARI Lab, The National Gallery, Trafalgar Square, London, WC2N 5DN
> 
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