xamluwpwin-universal-appcommandbar
UWP how to know if a button is in Commandbar.SecondaryCommand
How do I know if my AppBarButton is collapsed to the Commandbar.SecondaryCommand? As you can see from the image, when the window size is smaller, some of my buttons are added to the Flyout of More. And they are not displayed properly because I give them CornerRadius. How can I set the CornerRadius to zero when the buttons are added to the SecondaryCommand?
A better solution for me would be implementing this effect on my own, because the provided More button doesn't have its label and I want to customize the SecondaryCommand Flyout. But I don't know how.
Solution
You can use the VisualState that comes with AppBarButton to solve your problem.
AppBarButton has two modes: normal state and overflow state. It displays rounded corners in normal state and removes rounded corners in overflow state. You can write this way:
<Style TargetType="AppBarButton" x:Key="BasicAppButtonStyle">
<Setter Property="Background" Value="{ThemeResource AppBarButtonRevealBackground}" />
<Setter Property="Foreground" Value="{ThemeResource AppBarButtonForeground}" />
<Setter Property="BorderThickness" Value="{ThemeResource AppBarButtonRevealBorderThemeThickness}" />
<Setter Property="HorizontalAlignment" Value="Stretch" />
<Setter Property="VerticalAlignment" Value="Top" />
<Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}" />
<Setter Property="FontWeight" Value="Normal" />
<Setter Property="Width" Value="Auto" />
<Setter Property="UseSystemFocusVisuals" Value="{StaticResource UseSystemFocusVisuals}" />
<Setter Property="AllowFocusOnInteraction" Value="False" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="AppBarButton">
<Grid x:Name="Root" MinWidth="{TemplateBinding MinWidth}" MaxWidth="{TemplateBinding MaxWidth}" Background="{TemplateBinding Background}" CornerRadius="{TemplateBinding CornerRadius}" Margin="1,0">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="ApplicationViewStates">
<VisualState x:Name="FullSize" />
<VisualState x:Name="Compact">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="TextLabel" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentViewbox" Storyboard.TargetProperty="Margin">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarButtonContentViewboxCompactMargin}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="LabelOnRight">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentViewbox" Storyboard.TargetProperty="Margin">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarButtonContentViewboxMargin}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentRoot" Storyboard.TargetProperty="MinHeight">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarThemeCompactHeight}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="TextLabel" Storyboard.TargetProperty="(Grid.Row)">
<DiscreteObjectKeyFrame KeyTime="0" Value="0" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="TextLabel" Storyboard.TargetProperty="(Grid.Column)">
<DiscreteObjectKeyFrame KeyTime="0" Value="1" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="TextLabel" Storyboard.TargetProperty="TextAlignment">
<DiscreteObjectKeyFrame KeyTime="0" Value="Left" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="TextLabel" Storyboard.TargetProperty="Margin">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarButtonTextLabelOnRightMargin}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="LabelCollapsed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentRoot" Storyboard.TargetProperty="MinHeight">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarThemeCompactHeight}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="TextLabel" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentViewbox" Storyboard.TargetProperty="Margin">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarButtonContentViewboxCompactMargin}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Overflow">
<VisualState.Setters>
<Setter Target="ContentRoot.MinHeight" Value="0" />
<Setter Target="ContentViewbox.Visibility" Value="Collapsed" />
<Setter Target="TextLabel.Visibility" Value="Collapsed" />
<Setter Target="OverflowTextLabel.Visibility" Value="Visible" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="OverflowWithToggleButtons">
<VisualState.Setters>
<Setter Target="ContentRoot.MinHeight" Value="0" />
<Setter Target="ContentViewbox.Visibility" Value="Collapsed" />
<Setter Target="TextLabel.Visibility" Value="Collapsed" />
<Setter Target="OverflowTextLabel.Visibility" Value="Visible" />
<Setter Target="OverflowTextLabel.Margin" Value="38,0,12,0" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="OverflowWithMenuIcons">
<VisualState.Setters>
<Setter Target="ContentRoot.MinHeight" Value="0" />
<Setter Target="ContentViewbox.HorizontalAlignment" Value="Left" />
<Setter Target="ContentViewbox.VerticalAlignment" Value="Center" />
<Setter Target="ContentViewbox.Width" Value="16" />
<Setter Target="ContentViewbox.Height" Value="16" />
<Setter Target="ContentViewbox.Margin" Value="12,0,12,0" />
<Setter Target="TextLabel.Visibility" Value="Collapsed" />
<Setter Target="OverflowTextLabel.Visibility" Value="Visible" />
<Setter Target="OverflowTextLabel.Margin" Value="38,0,12,0" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="OverflowWithToggleButtonsAndMenuIcons">
<VisualState.Setters>
<Setter Target="ContentRoot.MinHeight" Value="0" />
<Setter Target="ContentViewbox.HorizontalAlignment" Value="Left" />
<Setter Target="ContentViewbox.VerticalAlignment" Value="Center" />
<Setter Target="ContentViewbox.Width" Value="16" />
<Setter Target="ContentViewbox.Height" Value="16" />
<Setter Target="ContentViewbox.Margin" Value="38,0,12,0" />
<Setter Target="TextLabel.Visibility" Value="Collapsed" />
<Setter Target="OverflowTextLabel.Visibility" Value="Visible" />
<Setter Target="OverflowTextLabel.Margin" Value="76,0,12,0" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal">
<VisualState.Setters>
<Setter Target="Root.CornerRadius" Value="20"/>
</VisualState.Setters>
<Storyboard>
<PointerUpThemeAnimation Storyboard.TargetName="ContentRoot" />
</Storyboard>
</VisualState>
<VisualState x:Name="PointerOver">
<VisualState.Setters>
<Setter Target="Root.CornerRadius" Value="20"/>
<Setter Target="Root.(RevealBrush.State)" Value="PointerOver" />
<Setter Target="Root.Background" Value="{ThemeResource AppBarButtonRevealBackgroundPointerOver}" />
<Setter Target="Content.Foreground" Value="{ThemeResource AppBarButtonForegroundPointerOver}" />
<Setter Target="TextLabel.Foreground" Value="{ThemeResource AppBarButtonForegroundPointerOver}" />
<Setter Target="OverflowTextLabel.Foreground" Value="{ThemeResource AppBarButtonForegroundPointerOver}" />
</VisualState.Setters>
<Storyboard>
<PointerUpThemeAnimation Storyboard.TargetName="OverflowTextLabel" />
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<VisualState.Setters>
<Setter Target="Root.CornerRadius" Value="15"/>
<Setter Target="Root.(RevealBrush.State)" Value="Pressed" />
<Setter Target="Root.Background" Value="{ThemeResource AppBarButtonRevealBackgroundPressed}" />
<Setter Target="Content.Foreground" Value="{ThemeResource AppBarButtonForegroundPressed}" />
<Setter Target="TextLabel.Foreground" Value="{ThemeResource AppBarButtonForegroundPressed}" />
<Setter Target="OverflowTextLabel.Foreground" Value="{ThemeResource AppBarButtonForegroundPressed}" />
</VisualState.Setters>
<Storyboard>
<PointerDownThemeAnimation Storyboard.TargetName="OverflowTextLabel" />
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<VisualState.Setters>
<Setter Target="Root.CornerRadius" Value="15"/>
<Setter Target="Root.Background" Value="{ThemeResource AppBarButtonRevealBackgroundDisabled}" />
<Setter Target="Border.BorderBrush" Value="{ThemeResource AppBarButtonRevealBorderBrushDisabled}" />
<Setter Target="Content.Foreground" Value="{ThemeResource AppBarButtonForegroundDisabled}" />
<Setter Target="TextLabel.Foreground" Value="{ThemeResource AppBarButtonForegroundDisabled}" />
<Setter Target="OverflowTextLabel.Foreground" Value="{ThemeResource AppBarButtonForegroundDisabled}" />
<Setter Target="KeyboardAcceleratorTextLabel.Foreground" Value="{ThemeResource AppBarButtonKeyboardAcceleratorTextForegroundDisabled}" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="OverflowNormal">
<VisualState.Setters>
<Setter Target="Root.CornerRadius" Value="0"/>
</VisualState.Setters>
<Storyboard>
<PointerUpThemeAnimation Storyboard.TargetName="ContentRoot" />
</Storyboard>
</VisualState>
<VisualState x:Name="OverflowPointerOver">
<VisualState.Setters>
<Setter Target="Root.CornerRadius" Value="0"/>
<Setter Target="Root.Background" Value="{ThemeResource AppBarButtonRevealBackgroundPointerOver}" />
<Setter Target="Content.Foreground" Value="{ThemeResource AppBarButtonForegroundPointerOver}" />
<Setter Target="TextLabel.Foreground" Value="{ThemeResource AppBarButtonForegroundPointerOver}" />
<Setter Target="OverflowTextLabel.Foreground" Value="{ThemeResource AppBarButtonForegroundPointerOver}" />
<Setter Target="KeyboardAcceleratorTextLabel.Foreground" Value="{ThemeResource AppBarButtonKeyboardAcceleratorTextForegroundPointerOver}" />
</VisualState.Setters>
<Storyboard>
<PointerUpThemeAnimation Storyboard.TargetName="ContentRoot" />
</Storyboard>
</VisualState>
<VisualState x:Name="OverflowPressed">
<VisualState.Setters>
<Setter Target="Root.CornerRadius" Value="0"/>
<Setter Target="Root.Background" Value="{ThemeResource AppBarButtonRevealBackgroundPressed}" />
<Setter Target="Content.Foreground" Value="{ThemeResource AppBarButtonForegroundPressed}" />
<Setter Target="TextLabel.Foreground" Value="{ThemeResource AppBarButtonForegroundPressed}" />
<Setter Target="OverflowTextLabel.Foreground" Value="{ThemeResource AppBarButtonForegroundPressed}" />
<Setter Target="KeyboardAcceleratorTextLabel.Foreground" Value="{ThemeResource AppBarButtonKeyboardAcceleratorTextForegroundPressed}" />
</VisualState.Setters>
<Storyboard>
<PointerDownThemeAnimation Storyboard.TargetName="ContentRoot" />
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="InputModeStates">
<VisualState x:Name="InputModeDefault" />
<VisualState x:Name="TouchInputMode">
<VisualState.Setters>
<Setter Target="OverflowTextLabel.Padding" Value="{ThemeResource AppBarButtonOverflowTextTouchMargin}" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="GameControllerInputMode">
<VisualState.Setters>
<Setter Target="OverflowTextLabel.Padding" Value="{ThemeResource AppBarButtonOverflowTextTouchMargin}" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="KeyboardAcceleratorTextVisibility">
<VisualState x:Name="KeyboardAcceleratorTextCollapsed" />
<VisualState x:Name="KeyboardAcceleratorTextVisible">
<VisualState.Setters>
<Setter Target="KeyboardAcceleratorTextLabel.Visibility" Value="Visible" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Grid x:Name="ContentRoot" MinHeight="{ThemeResource AppBarThemeMinHeight}" Margin="-1,0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Viewbox x:Name="ContentViewbox"
Height="{ThemeResource AppBarButtonContentHeight}"
Margin="{ThemeResource AppBarButtonContentViewboxCollapsedMargin}"
HorizontalAlignment="Stretch"
AutomationProperties.AccessibilityView="Raw" >
<ContentPresenter x:Name="Content"
Content="{TemplateBinding Icon}"
Foreground="{TemplateBinding Foreground}"/>
</Viewbox>
<TextBlock x:Name="TextLabel"
Grid.Row="1"
Text="{TemplateBinding Label}"
Foreground="{TemplateBinding Foreground}"
FontSize="12"
FontFamily="{TemplateBinding FontFamily}"
TextAlignment="Center"
TextWrapping="Wrap"
Margin="{ThemeResource AppBarButtonTextLabelMargin}"
AutomationProperties.AccessibilityView="Raw" />
<TextBlock x:Name="OverflowTextLabel"
Text="{TemplateBinding Label}"
Foreground="{TemplateBinding Foreground}"
FontSize="15"
FontFamily="{TemplateBinding FontFamily}"
TextAlignment="Left"
TextTrimming="Clip"
TextWrapping="NoWrap"
HorizontalAlignment="Stretch"
VerticalAlignment="Center"
Margin="12,0,12,0"
Padding="{ThemeResource AppBarButtonOverflowTextLabelPadding}"
Visibility="Collapsed"
AutomationProperties.AccessibilityView="Raw" />
<TextBlock x:Name="KeyboardAcceleratorTextLabel"
Grid.Column="1"
Style="{ThemeResource CaptionTextBlockStyle}"
Text="{TemplateBinding KeyboardAcceleratorTextOverride}"
MinWidth="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.KeyboardAcceleratorTextMinWidth}"
Margin="24,0,12,0"
Foreground="{ThemeResource AppBarButtonKeyboardAcceleratorTextForeground}"
HorizontalAlignment="Right"
VerticalAlignment="Center"
Visibility="Collapsed"
AutomationProperties.AccessibilityView="Raw" />
<Border x:Name="Border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="{TemplateBinding CornerRadius}" Grid.RowSpan="2" Grid.ColumnSpan="2" Margin="1,0" />
</Grid>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Usage
<AppBarButton Style="{StaticResource BasicAppButtonStyle}" Icon="Shuffle" Label="Shuffle"/>
Best regards.