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Re^2: Perl-Gtk2::How to set a window background image.

by turo (Friar)
on Feb 14, 2006 at 17:38 UTC ( #530173=note: print w/replies, xml ) Need Help??


in reply to Re: Perl-Gtk2::How to set a window background image.
in thread Perl-Gtk2::How to set a window background image.

I was very upset and discouraged ... and when i was resigned to open and xpm image, load it to a pixmap, and then load it with the Gtk2::RcStyle as a background image ...
when i received your reply ...
The use of an XPM hardcoded into an array was like a deją vu ... I took my last breath and said i'm going to make the last effort ... and an hour after ... tachan!!!!!

I can load any image (jpeg, png ... and all those supported by the gdkPixbuf) to a background. Here is the code, modified from the one you submitted (i've only change the set_bg function ...)

#!/usr/bin/perl use warnings; use strict; use Glib qw/TRUE FALSE/; use Gtk2 '-init'; my $rc_style = Gtk2::RcStyle->new; $rc_style->bg_pixmap_name('normal', 'bunny.xpm'); my $window = Gtk2::Window->new('toplevel'); $window->set_title('Embed test'); $window ->signal_connect( 'destroy' => \&delete_event ); $window->set_border_width(10); $window->set_size_request(500,500); $window->modify_style ($rc_style); my $vbox = Gtk2::VBox->new( FALSE, 6 ); $window->add($vbox); $vbox->set_border_width(2); my $hbox= Gtk2::HBox->new( FALSE, 6 ); $vbox->pack_end($hbox,FALSE,FALSE,0); $hbox->set_border_width(2); $vbox->pack_end (Gtk2::HSeparator->new, FALSE, FALSE, 0); my $button = Gtk2::Button->new_from_stock('gtk-quit'); $hbox->pack_end( $button, FALSE, FALSE, 0 ); $button->signal_connect( clicked => \&delete_event ); my $button1 = Gtk2::Button->new('Set BG'); $hbox->pack_end( $button1, FALSE, FALSE, 0 ); $button1->signal_connect( clicked => \&set_bg ); my $vbox1 = Gtk2::VBox->new( 0, 5 ); $vbox->pack_end ($vbox1, TRUE, TRUE, 0); my $btn = Gtk2::Button->new_from_stock('gtk-quit'); $btn->signal_connect( 'clicked' => \&delete_event ); $window->show_all(); Gtk2->main; ##################################### sub delete_event { Gtk2->main_quit; return FALSE; } #### sub set_bg{ #### PNG & Pixbuff :-) my $values; my ($widget, $context, @other_params) = @_; my $colormap = $window->get_default_colormap; my $pixbuff = Gtk2::Gdk::Pixbuf->new_from_file("figure.png"); my $graphicContext = Gtk2::GC->get(Gtk2::Gdk::Visual->get_best_depth, $colormap, $values); $pixbuff->render_to_drawable($widget->get_parent_window, $graphicContext, 0,0,0,0,500,500,'normal',0,0); }

The conclusion, is:
In X11 programming, you can draw anything to any 'drawable' window (i'm not an expert, but this is correct), With the help of Gtk2::Widget::get_parent_window we obtain a Gtk2::Gdk::Window which is a Gtk2::Gdk::Drawable. Once we got a drawable window, i think we can do almost anything with it (low level :') ... and low docummented)

Okay, alls seems to be fine, but i have other problem now; how i obtain a Gtk2::Gdk::Window without waiting to the execution of the callback function? ... We need a kind of casting function!!!! ... Ideas?


Cheers
turo



(... thanks zentara!!! ...)

perl -Te 'print map { chr((ord)-((10,20,2,7)[$i++])) } split //,"turo"'

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Re^3: Perl-Gtk2::How to set a window background image.
by zentara (Archbishop) on Feb 14, 2006 at 20:11 UTC
    Hi, I think you are on the right track. I was experimenting with a Drawable area. I tried your code, but I am getting segmentation faults. :-( I'm using Gtk+2.8.11. Anyways, I will experiment with your code, and hope I can get it to go.

    Alot of the problem, is the non-intuitive nature of the Gtk2 objects, somethings can be written on, and somethings are only containers. It might be smart of you to ask muppet on the gtk-perl maillist. If anyone knows, it would be him.


    I'm not really a human, but I play one on earth. flash japh

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