tally-rs 0.1.0

A tally taking application for manually tracking and counts events.
<?xml version='1.0' encoding='UTF-8'?>
<interface>
  <template class="MyAppWindow" parent="GtkApplicationWindow">
    <property name="default-height">300</property>
    <property name="default-width">400</property>
    <property name="hexpand">True</property>
    <property name="show-menubar">True</property>
    <property name="title">GTK Occurance Tracker</property>
    <property name="vexpand">True</property>
    <child>
      <object class="GtkBox">
        <property name="halign">center</property>
        <property name="margin-top">10</property>
        <property name="spacing">5</property>      
        <property name="orientation">vertical</property>
        <child>
          <object class="GtkBox">
            <property name="halign">center</property>
            <property name="valign">center</property>
            <property name="spacing">10</property>      
            <child>
              <object class="GtkButton" id="minus">
                <signal name="clicked" handler="sub_to_counter" swapped="true"/>
                <property name="label">-</property>
                <property name="focus-on-click">True</property>
              </object>                                      
            </child>
            <child>
                  <object class="GtkLabel" id="count_label">
                    <property name="label"
                      bind-source="MyAppWindow"
                      bind-property="counter"
                      bind-flags="sync-create"/>
                    <property name="justify">center</property>
                    <property name="margin-end">5</property>
                    <property name="margin-start">5</property>
                    <property name="margin-top">8</property>
                    <property name="margin-bottom">5</property>
                  </object>
            </child>
            <child>
              <object class="GtkButton" id="plus">
                <signal name="clicked" handler="add_to_counter" swapped="true"/>
                <property name="label">+</property>
                <property name="focus-on-click">True</property>
              </object>                                      
            </child>
          </object>
        </child>
      </object>
    </child>   
  </template>
</interface>