Why IsFocused not fired on Label

Question

I just want to define a trigger that changes a Label background color when focused, but it doesn't work. Doing the same with button is OK. Are there something wrong ?!?! I also got a same problem with Border and textblock.

Update code xaml:

  <Window.Resources>
    <SolidColorBrush x:Key="GridLineBrush" Color="#8DAED9" />
    <SolidColorBrush x:Key="HeaderWeekDayBackground" Color="#A5BFE1" />
    <Style x:Key="borderStyle" TargetType="Control">
      <Setter Property="Background" Value="{StaticResource HeaderWeekDayBackground}" />
      <Style.Triggers>
        <Trigger Property="IsFocused" Value="true">
          <Setter Property="Background" Value="Blue" />
        </Trigger>
      </Style.Triggers>
    </Style>
  </Window.Resources>

  <Grid>
    <Grid.RowDefinitions>
      <RowDefinition/>
      <RowDefinition/>
    </Grid.RowDefinitions>
    <Button Style="{StaticResource borderStyle}" 
        Grid.Row="0" >
    </Button>
    <Label Focusable="True" Style="{StaticResource borderStyle}" 
        Grid.Row="1" >
    </Label>
  </Grid>
</Window>

How do you intend to give the Label focus? – H.B. Jul 12 '11 at 02:35 — H.B., Jul 12 '11 at 02:35

H.B. · Accepted Answer · 2011-07-12T02:52:23.520

3

Not all controls are focusable by default, set Focusable to true ans see if that helps.

One problem you might encounter is that by default the Label does not receive focus from mouse-events.

I do not know if there is a clean XAML-only way to set the focus but you could handle a mouse-event:

<Label Focusable="True" Content="Test" MouseLeftButtonUp="Label_MouseLeftButtonUp">
    <Label.Style>
        <Style TargetType="Label">
            <Style.Triggers>
                <Trigger Property="IsFocused" Value="True">
                    <Setter Property="Background" Value="Red" />
                </Trigger>
            </Style.Triggers>
        </Style>
    </Label.Style>
</Label>

//Note that this is not a "proper" click.
private void Label_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
    var label = sender as Label;
    label.Focus();
}

edited Jul 12 '11 at 02:52

answered Jul 12 '11 at 02:21

H.B.

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It still not working after set focusable to true – KevinBui Jul 12 '11 at 02:24
Please see my code above, it doesnt work. If label or border cant recevie focus from mouse, how to make it does? – KevinBui Jul 12 '11 at 02:35
See my comment to your question. – H.B. Jul 12 '11 at 02:36
yeah I see, so how to make it receive focus, I need it highlight after the mouse click – KevinBui Jul 12 '11 at 02:38
I added the ugly code-behind option to my answer. XAML only might be difficult. – H.B. Jul 12 '11 at 02:55

Why IsFocused not fired on Label

1 Answers1