Re: Background image in a window

["Tadej Borovšak" <tadeboro gmail com>]

Hi.

I was dealing with a similar problem not so long ago and came up with
this piece of code that does what you want (plus some more, so please
ignore the commented sections - the main point of the example is the
usage of expose-event event).

----------------
#include <gtk/gtk.h>

static gboolean
cb_expose( GtkWidget      *widget,
		   GdkEventExpose *event,
		   GdkPixbuf      *buf )
{
	gdk_draw_pixbuf( widget->window, NULL, buf, 0, 0, 0, 0, -1, -1,
GDK_RGB_DITHER_NONE, 0, 0 );
	return FALSE;
}

int
main (int argc, char *argv[])
{
    GtkWidget         *window;
    GtkWidget         *button;
	GdkPixbuf         *buf;
	GdkPixmap         *map;
	GdkBitmap         *mask;

    gtk_init (&argc, &argv);

    window = gtk_window_new( GTK_WINDOW_TOPLEVEL );
	gtk_container_set_border_width( GTK_CONTAINER( window ), 20 );
	g_signal_connect( G_OBJECT( window ), "destroy",
					  G_CALLBACK( gtk_main_quit ), NULL );
	
	/*gtk_window_set_default_size( GTK_WINDOW( window ), 300, 300 );
	gtk_window_set_decorated( GTK_WINDOW( window ), FALSE );
	gtk_widget_realize( window );*/
	
	buf = gdk_pixbuf_new_from_file( "test.png", NULL );
	/*gdk_pixbuf_render_pixmap_and_mask( buf, &map, &mask, 10 );
	gdk_window_shape_combine_mask( window->window, mask, 0, 0 );*/
	gtk_widget_set_app_paintable( window, TRUE );
	g_signal_connect( G_OBJECT( window ), "expose-event",
					  G_CALLBACK( cb_expose ), buf );
	
	button = gtk_button_new_with_label( "WOW" );
	gtk_container_add( GTK_CONTAINER( window ), button );
	
    gtk_widget_show_all( window );
    gtk_main();

    return 0;
}
--------------------


2008/12/6 zentara <zentara1 sbcglobal net>:
> On Sat, 6 Dec 2008 09:55:55 +0530
> "Harinandan S" <harinandans gmail com> wrote:
>
>>Hi All,
>>
>>How to set background image to a window? In my window there are few buttons.
>>I want to set background image to the entire window? I googled but couldnt
>>find much help.
>>
>>Regards,
>>Harinandan S
> Hi,
> I use Perl and it was tough to figure that one out, because of the theme
> engine, and the need to override it. If you use a pixmap based theme, it
> is tenacious.
>
> However, if you want a Perl clue on how to do it, see renegadex's reply
> at the bottom of
>  http://perlmonks.org?node_id=530061
>
> the basics is to get the current style of the window, and reset the bg_pixmap
>
>  my $back_pixbuf = Gtk2::Gdk::Pixbuf->new_from_file($image);
>  my  ($pixmap,$mask) = $back_pixbuf->render_pixmap_and_mask(255);
>  my  $style = $window->get_style(); $style=$style->copy();
>  $style->bg_pixmap("normal",$pixmap); $window->set_style($style);
>
> it should be easy to convert to c.
>
>
> Goodluck,
> zentara
>
> --
> I'm not really a human, but I play one on earth.
> http://zentara.net/Remember_How_Lucky_You_Are.html
> _______________________________________________
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>



-- 
Tadej Borovšak
00386 (0)40 613 131
tadeboro gmail com
tadej borovsak gmail com