I want to change the PivotHeaderItem Style of Pivot. So, I googled and found some code from some blog. But I didn't understand, how the modified PivotHeaderItem style is assigned to the Pivot. They just put the PivotHeaderItem style in Page.Resources.
<Page.Resources>
<Style TargetType="PivotHeaderItem">
<Setter Property="FontSize" Value="{ThemeResource PivotHeaderItemFontSize}" />
<Setter Property="FontFamily" Value="{ThemeResource PivotHeaderItemFontFamily}" />
<Setter Property="FontWeight" Value="{ThemeResource PivotHeaderItemThemeFontWeight}" />
<Setter Property="CharacterSpacing" Value="{ThemeResource PivotHeaderItemCharacterSpacing}" />
<Setter Property="Background" Value="Transparent" />
<Setter Property="Foreground" Value="{ThemeResource SystemControlForegroundBaseMediumBrush}" />
<Setter Property="Padding" Value="{ThemeResource PivotHeaderItemMargin}" />
<Setter Property="Height" Value="48" />
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="IsTabStop" Value="False" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="PivotHeaderItem">
<Grid x:Name="Grid" Margin="10,0" Background="{TemplateBinding Background}">
<Grid.Resources>
<Style x:Key="BaseContentPresenterStyle" TargetType="ContentPresenter">
<Setter Property="FontFamily" Value="XamlAutoFontFamily" />
<Setter Property="FontWeight" Value="SemiBold" />
<Setter Property="FontSize" Value="15" />
<Setter Property="TextWrapping" Value="Wrap" />
<Setter Property="LineStackingStrategy" Value="MaxHeight" />
<Setter Property="TextLineBounds" Value="Full" />
<Setter Property="OpticalMarginAlignment" Value="TrimSideBearings" />
</Style>
<Style x:Key="BodyContentPresenterStyle" BasedOn="{StaticResource BaseContentPresenterStyle}" TargetType="ContentPresenter">
<Setter Property="FontFamily" Value="{ThemeResource PivotHeaderItemFontFamily}" />
<Setter Property="FontWeight" Value="{ThemeResource PivotHeaderItemThemeFontWeight}" />
<Setter Property="FontSize" Value="{ThemeResource PivotHeaderItemFontSize}" />
</Style>
</Grid.Resources>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="SelectionStates">
<VisualStateGroup.Transitions>
<VisualTransition From="Unselected" GeneratedDuration="0:0:0.33" To="UnselectedLocked" />
<VisualTransition From="UnselectedLocked" GeneratedDuration="0:0:0.33" To="Unselected" />
</VisualStateGroup.Transitions>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unselected" />
<VisualState x:Name="UnselectedLocked">
<Storyboard>
<DoubleAnimation Duration="0"
Storyboard.TargetName="ContentPresenterTranslateTransform"
Storyboard.TargetProperty="X"
To="{ThemeResource PivotHeaderItemLockedTranslation}" />
<DoubleAnimation Duration="0"
Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="(UIElement.Opacity)"
To="0" />
</Storyboard>
</VisualState>
<VisualState x:Name="Selected">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="White" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="UnselectedPointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseMediumHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedPointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseMediumHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="UnselectedPressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseMediumHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedPressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseMediumHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border x:Name="Border"
BorderBrush="Gray"
BorderThickness="2"
CornerRadius="20">
<ContentPresenter x:Name="ContentPresenter"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
FontFamily="{TemplateBinding FontFamily}"
FontSize="{TemplateBinding FontSize}"
FontWeight="{TemplateBinding FontWeight}">
<ContentPresenter.RenderTransform>
<TranslateTransform x:Name="ContentPresenterTranslateTransform" />
</ContentPresenter.RenderTransform>
</ContentPresenter>
</Border>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
<Grid>
<Pivot x:Name="rootPivot" Title="PIVOT TITLE">
<PivotItem Header="Pivot Item 1">
<!-- Pivot content goes here -->
<TextBlock Text="Content of pivot item 1." />
</PivotItem>
<PivotItem Header="Pivot Item 2">
<!-- Pivot content goes here -->
<TextBlock Text="Content of pivot item 2." />
</PivotItem>
<PivotItem Header="Pivot Item 3">
<!-- Pivot content goes here -->
<TextBlock Text="Content of pivot item 3." />
</PivotItem>
</Pivot>
</Grid>
Any one explain, How the styles inside the <Page.Resources> is assigned to Pivot Element inside the grid automatically.
CodePudding user response：
There are two ways to apply a style that is placed in the resource to a control.
Implicitly. You just need to specify only a TargetType for the Style.
Explicitly. You need to specifying a TargetType and an x:Key attribute for the Style. After that, you also need to set the target control's
Style propertywith a {StaticResource} markup extension. In the {StaticResource} markup extension, you could refer to the Style with the x:Key attribute you defined.
If a style contains the x:Key attribute, you can only apply it to a control by setting the Style property of the control to the keyed style. In contrast, when the xaml is compiled, a style without an x:Key attribute is automatically applied to every control of its target type unless that control has an explicit style setting.
Update:
To make the style only work for one Pivot control, you could put the style in the Pivot.Resources. Like the following code:
<Pivot x:Name="rootPivot" Title="PIVOT TITLE" >
<Pivot.Resources>
<Style TargetType="PivotHeaderItem">
......
......
</Pivot.Resources>
<PivotItem Header="Pivot Item 1" >
<!-- Pivot content goes here -->
<TextBlock Text="Content of pivot item 1." />
</PivotItem>
<PivotItem Header="Pivot Item 2">
<!-- Pivot content goes here -->
<TextBlock Text="Content of pivot item 2." />
</PivotItem>
<PivotItem Header="Pivot Item 3">
<!-- Pivot content goes here -->
<TextBlock Text="Content of pivot item 3." />
</PivotItem>
</Pivot>