GTK and Glade Help

m_agnum · **Joined:** Fri Aug 03, 2012 12:06 am **Posts:** 5

Hello,
I was wondering if anyone could help me with the strange error I am getting. I am trying out Glade and for some reason it is not working when I compile. Here is the error message:

Quote:

(gtk_demo_3:1735): Gtk-CRITICAL **: gtk_widget_show: assertion `GTK_IS_WIDGET (widget)' failed

Here is my C file:

Code:

 #include <gtk/gtk.h>

void
on_window_destroy (GtkObject *object, gpointer user_data)
{
    gtk_main_quit();
}
 
 int
 main (int argc, char *argv[])
{
             GtkBuilder *builder;
             GtkWidget *window;
 
              gtk_init (&argc, &argv);
 
              builder = gtk_builder_new ();
              gtk_builder_add_from_file (builder, "test1.xml", NULL);
 
              window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
              gtk_builder_connect_signals (builder, NULL);
              g_object_unref (G_OBJECT (builder));
 
              gtk_widget_show (window);
              gtk_main (); 
              return 0;
 }

It compiles and runs perfectly but then outputs that error. Here is the Glade XML:

Code:

<?xml version="1.0"?>
<interface>
  <!-- interface-requires gtk+ 2.24 -->
  <!-- interface-naming-policy project-wide -->
  <object class="GtkWindow" id="window">
    <property name="can_focus">False</property>
    <property name="border_width">10</property>
    <property name="title" translatable="yes">GTK_DEMO_3</property>
    <property name="modal">True</property>
    <child>
      <object class="GtkVBox" id="vbox">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <property name="homogeneous">True</property>
        <child>
          <object class="GtkImage" id="image">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <property name="stock">gtk-bold</property>
            <property name="icon-size">6</property>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">False</property>
            <property name="position">0</property>
          </packing>
        </child>
        <child>
          <object class="GtkHBox" id="hbox">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <property name="homogeneous">True</property>
            <child>
              <object class="GtkButton" id="Peripherals">
                <property name="label" translatable="yes">Peripherals</property>
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="receives_default">True</property>
              </object>
              <packing>
                <property name="expand">True</property>
                <property name="fill">True</property>
                <property name="position">0</property>
              </packing>
            </child>
            <child>
              <object class="GtkButton" id="Status">
                <property name="label" translatable="yes">Status</property>
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="receives_default">True</property>
              </object>
              <packing>
                <property name="expand">True</property>
                <property name="fill">True</property>
                <property name="position">1</property>
              </packing>
            </child>
            <child>
              <object class="GtkButton" id="System">
                <property name="label" translatable="yes">System</property>
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="receives_default">True</property>
              </object>
              <packing>
                <property name="expand">True</property>
                <property name="fill">True</property>
                <property name="position">2</property>
              </packing>
            </child>
          </object>
          <packing>
            <property name="expand">True</property>
            <property name="fill">True</property>
            <property name="position">1</property>
          </packing>
        </child>
      </object>
    </child>
  </object>
</interface>

Thank you!!

tadeboro · **Posted:** Fri Aug 03, 2012 8:17 am

Hello and welcome to the GTK+ forums!

I cannot tell exactly what went wrong, but most accurate guess I can give you is that your interface is not getting loaded properly and window is actually NULL. Check your filenames and their code references and try again. If things still fail, replace last parameter of gtk_builder_add_from_file() with an actual GError pointer and check for errors.

Cheers,
Tadej

m_agnum · **Joined:** Fri Aug 03, 2012 12:06 am **Posts:** 5

Thanks for the response. It turns out that the code was fine. The problem was that my testing script was not copying over the right XML file for GtkBuilder.

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