[Vala] (no subject)

[Adrian Stern]

Hello

I'm trying to learn a bit about vala and i'm facing some unexpected warnings. 
The program itself runs as expected.

So i have file called browser.vala which i compile and run. Inside of it there 
is a class called webPlayer which contains a Webkit webView. The main loop 
periodically destroys and recreates this class.
On every destroy() i get these two messages:

(browser:23160): Gtk-CRITICAL **: IA__gtk_widget_hide: assertion `GTK_IS_WIDGET 
(widget)' failed
(browser:23160): Gtk-CRITICAL **: IA__gtk_widget_destroy: assertion 
`GTK_IS_WIDGET (widget)' failed

When run over time this simple program does already leak memory which could be 
related to the mentioned messages above.

Compile and run:
valac --pkg=gtk+-2.0 --pkg=webkit-1.0 --thread --disable-assert browser.vala && 
./browser

I would appreciate any kind of help. Thanks.


Code:

using Gtk;
using WebKit;

public class MainWindow : Window {
  WebPlayer player;

  public void run (){
    change_media ();
    Timeout.add (2000, change_media);
  }

  private bool change_media (){
    if (player != null) player.destroy ();

    player = new WebPlayer ();
    player.start ("http://www.youtube.com/embed/XSGBVzeBUbk";);
    return true;
  }

  public static int main (string[] args){
    Gtk.init (ref args);

    var window = new MainWindow ();
    window.run ();

    Gtk.main ();

    return 0;
  }
}

public class WebPlayer : Window {
  private WebView web_view;

  public WebPlayer (){
    title = "web player";
    name = "window";
    set_size_request (800, 600);
    web_view = new WebView ();
    this.add (web_view);
  }

  public void start (string url){
    web_view.open (url);
    show_all ();
  }
}
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