title: Overwrite a Combobox style in an ItemTemplate to get rid of the focus grabbing
body: <p>Let's have a TextBox which purpose is to </p>
  
  <ul>
  <li>open a ComboBox if it is not already opened</li>
  <li>instantly filter the content of the ComboBox</li>
  </ul>
  
  <p>It works a bit, but the problem is the ComboBox gets the focus when I hover on it with my mouse, triggering the loss of the focus for the TextBox, which is annoying.</p>
  
  <p>I searched a bit and I would like to set "isEnabled" property to false, in all the ComboboxItems.
  But the ComboBox already has a style, and I would rather avoid to change it; moreover I did not manage overwriting the ComboBox style.</p>
  
  <p>Here is the ComboBox xaml:</p>
  
  <pre><code>&lt;ComboBox Style="{StaticResource FloatingComboBox}" IsEnabled="{Binding AdjustmentTimeCauseIsEnabled}" ItemsSource="{Binding FuneralHomes}" SelectedValue="{Binding SelectedFuneralHome}" IsDropDownOpen="{Binding IsFuneralHomesComboOpen}"&gt;
      &lt;ComboBox.ItemTemplate&gt;
          &lt;DataTemplate&gt;
              &lt;Grid Margin="0,0,15,0"&gt;
                  &lt;Grid.ColumnDefinitions&gt;
                      &lt;ColumnDefinition Width="Auto"/&gt;
                      &lt;ColumnDefinition Width="Auto"/&gt;
                      &lt;ColumnDefinition Width="Auto"/&gt;
                  &lt;/Grid.ColumnDefinitions&gt;
                  &lt;TextBlock Grid.Column="0" Text="{Binding Name}" Foreground="Blue" TextTrimming="CharacterEllipsis"/&gt;
                  &lt;TextBlock Grid.Column="1" Text="|" Foreground="Black" Margin="5,0,0,0" TextTrimming="CharacterEllipsis"/&gt;
                  &lt;TextBlock Grid.Column="2" Text="{Binding Address}" Margin="5,0,0,0" TextTrimming="CharacterEllipsis"/&gt;
              &lt;/Grid&gt;
          &lt;/DataTemplate&gt;
      &lt;/ComboBox.ItemTemplate&gt;
  &lt;/ComboBox&gt;
  </code></pre>
  
  <p>thank you.</p>