CODEWITHSUNDEEP
wpfwpf-style
PlTaylor
PlTaylor

Reputation: 7525

How to set the properties of the child control of Label

I would like to change the properties of the Border control that is a child of the default Label control. I have the following style and everything except the changes to the Border control are being shown in the UI

<Style x:Key="StandardLabel" TargetType="{x:Type Label}" BasedOn="{StaticResource {x:Type Label}}">
    <Setter Property="HorizontalAlignment" Value="Center" />
    <Setter Property="ContentStringFormat" Value="{}{0:0.000}"/>
    <Setter Property="Height" Value="25"/>
    <Setter Property="Margin" Value="0"/>
    <Style.Resources>
        <Style TargetType="{x:Type Border}" >
            <Setter Property="Padding" Value="3"/>
        </Style>
    </Style.Resources>
</Style>

I used this answer as the basis for what I am trying, but it does not seem to work for me. Any thoughts on what I am doing wrong?

Upvotes: 0

Views: 363

Answers (1)

15ee8f99-57ff-4f92-890c-b56153
15ee8f99-57ff-4f92-890c-b56153

Reputation: 37059

If you've got the same default Label template as me, the Border has padding set via an attribute, which due to dependency property value precedence will override anything done in a style. 

<ControlTemplate TargetType="{x:Type Label}">
    <Border 
        BorderBrush="{TemplateBinding BorderBrush}" 
        BorderThickness="{TemplateBinding BorderThickness}"
        Background="{TemplateBinding Background}" 
        Padding="{TemplateBinding Padding}" 
        SnapsToDevicePixels="true"
        >

However, look what value that attribute uses: Padding="{TemplateBinding Padding}"

So it'll use whatever Padding its templated parent has. That's the Label. So this should do what you want:

<Style x:Key="StandardLabel" TargetType="{x:Type Label}" BasedOn="{StaticResource {x:Type Label}}">
    <Setter Property="Padding" Value="3" />

That will work for any property where the Border has a TemplateBinding to a property of the Label. Anything else (if Border had any useful properties not already accounted for), you could use your local implicit style method; I tested that with a copy of the default style, with the Background attribute removed from the Border in the template:

<Style x:Key="LabelStyle1" TargetType="{x:Type Label}" BasedOn="{StaticResource {x:Type Label}}">
    <Style.Resources>
        <Style TargetType="Border">
            <Setter Property="Background" Value="LightSkyBlue" />
        </Style>
    </Style.Resources>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Label}">
                <Border 
                    BorderBrush="{TemplateBinding BorderBrush}" 
                    BorderThickness="{TemplateBinding BorderThickness}" 
                    Padding="{TemplateBinding Padding}" 
                    SnapsToDevicePixels="true"
                    >

Upvotes: 1

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