Re: [ruby-gnome2-devel-en] No Gdk::Window and Pixbuf not shown

[Kouhei S. <ko...@co...>]

Hi,

In <919...@gm...>
  "[ruby-gnome2-devel-en] No Gdk::Window and Pixbuf not shown" on Fri, 11 Nov 2016 20:31:11 +0100,
  Detlef Wagner <det...@gm...> wrote:

> First:
> ======
> 
> require 'gtk3'
> 
> win = Gtk::Window.new
> 
> pixbuf = GdkPixbuf::Pixbuf.new :path => 'img.png', :width => 64, :height 
> => 64
> 
> img = Gtk::Image.new
> img.pixbuf = pixbuf
> #img = Gtk::Image.new :file => 'img.png'
> 
> win.add img
> win.show_all
> Gtk.main

You should use :file instead of :path for GdkPixbuf::Pixbuf.new:

  GdkPixbuf::Pixbuf.new :file => 'img.png'

The API isn't changed at least in recent releases.

> Second:
> =======
> 
> require 'gtk3'
> 
> win = Gtk::Window.new
> win.signal_connect(:draw) do
>      p win.window.class
> end
> win.show_all
> Gtk.main
> 
> 
> The output is:
> #<Class:0x00000001f5b9b8>
> 
> but I belief that it should be:
> Gdk::Window

Try:

  win.signal_connect(:draw) do
       p win.window.class
       p win.window.class.gtype
       p win.window.class.ancestors
  end

You'll get the following output:

  #<Class:0x0055ba4fe75b58>
  GLib::Type["GdkX11Window"]
  [#<Class:0x0055ba4fe75b58>, Gdk::Window, GLib::Object, GLib::Instantiatable, Object, Kernel, BasicObject]

#<Class:0x0055ba4fe75b58> is a subclass of Gdk::Window. It
depends on your windows system.

This API isn't also changed at least in recent releases.

> And then I have the problem, that configure events in combination with 
> Gtk::DrawingArea s are give not the right size of the area. But this is 
> in a quite complex program and I first try to track it down.

If we have a script that reproduce the problem, we may fix it.

> For me, it seams that the gtk API and ABI compatibility is brocken :-(

We should fix unexpected API incompatibilities.


Thanks,
--
kou