Why is the first toolbar button automatically selected when my gtk application loads?

Question

When my gtk application loads, the first item on the toolbar is automatically selected (it is highlighted, it is pressed when it hit enter). This is just a minor problem, but I would prefer for nothing to be selected by default.

Here is some basic sample code:

import gtk
import gtk.glade

window_tree = gtk.glade.XML('testtoolbar.glade')

gtk.main()

testtoolbar.glade

<?xml version="1.0"?>
<glade-interface>
  <!-- interface-requires gtk+ 2.16 -->
  <!-- interface-naming-policy project-wide -->
  <widget class="GtkWindow" id="window1">
    <property name="width_request">200</property>
    <property name="visible">True</property>
    <child>
      <widget class="GtkToolbar" id="toolbar1">
        <property name="visible">True</property>
        <child>
          <widget class="GtkToolButton" id="toolbutton1">
            <property name="visible">True</property>
            <property name="label" translatable="yes">toolbutton1</property>
            <property name="use_underline">True</property>
            <property name="stock_id">gtk-new</property>
          </widget>
          <packing>
            <property name="expand">False</property>
            <property name="homogeneous">True</property>
          </packing>
        </child>
        <child>
          <widget class="GtkToolButton" id="toolbutton2">
            <property name="visible">True</property>
            <property name="label" translatable="yes">toolbutton2</property>
            <property name="use_underline">True</property>
            <property name="stock_id">gtk-open</property>
          </widget>
          <packing>
            <property name="expand">False</property>
            <property name="homogeneous">True</property>
          </packing>
        </child>
      </widget>
    </child>
  </widget>
</glade-interface>

Answer 1

This is probably just GTK+ handing the focus to some widget, it likes to have a widget focused if possible.

You can use grab_focus() to move the focus elsewhere, to get the desired behavior. If the toolbar is all the widgetry you have, it might be hard to find a suitable focus "target", though.