HScale don't move

["Xi Yang" <jiandingzhe 163 com>]

Hi everyone!


I'm designing an application with Gtk2 and Glade designer.
However, the sliding bar of the HScale just don't move while being dragged. I can't find where is the problem.

This is the part of glade file that defines the HScale and Adjustment:


<child>
              <object class="GtkHScale" id="scale_assign">
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="adjustment">adj_assign</property>
                <property name="digits">0</property>
              </object>
              <packing>
                <property name="left_attach">1</property>
                <property name="right_attach">2</property>
                <property name="top_attach">1</property>
                <property name="bottom_attach">2</property>
              </packing>
            </child>




<object class="GtkAdjustment" id="adj_assign">
    <property name="value">5</property>
    <property name="upper">10</property>
    <property name="step_increment">0.10000000000000001</property>
    <property name="page_increment">10</property>
    <property name="page_size">10</property>
  </object>