文本框周围的部分边框
在我手机上的Spotify应用程序的屏幕截图中，您可以看到他们在左下角和右下角做了一些看起来像部分边框的东西。我找不到任何特定属性来模仿，所以有人可以向我解释他们是如何做到的吗？
我尝试过使用边框半径，但除非我做错了什么，否则我认为不那么简单。他们只是在它下面有自定义形状吗？
2 个答案:
答案 0 :(得分：4)
更好的方法是让TextBox重新设置左侧和右侧Rectangle两侧，一侧位于底部，以模仿半边框外观。
<Rectangle x:Name="BottomLine" Grid.ColumnSpan="2" Grid.Row="1" Grid.RowSpan="1" VerticalAlignment="Bottom" Height="2" Fill="{TemplateBinding BorderBrush}" />
<Rectangle x:Name="LeftVerticalLine" HorizontalAlignment="Left" Height="4" Margin="0,0,0,2" Grid.Row="1" Stretch="Fill" UseLayoutRounding="True" VerticalAlignment="Bottom" Width="2" RenderTransformOrigin="0.5,1" Fill="{TemplateBinding BorderBrush}">
<Rectangle.RenderTransform>
<CompositeTransform />
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="RightVerticalLine" HorizontalAlignment="Right" Height="4" Margin="0,0,0,2" Grid.Row="1" Stretch="Fill" UseLayoutRounding="True" VerticalAlignment="Bottom" Width="2" RenderTransformOrigin="0.5,1" Grid.ColumnSpan="2" Fill="{TemplateBinding BorderBrush}">
<Rectangle.RenderTransform>
<CompositeTransform />
</Rectangle.RenderTransform>
</Rectangle>
为什么更好？因为它们现在是TextBox模板的组件，所以您可以将动画应用于视觉状态，以获得更好的用户体验。
例如，我希望在ScaleTransform处于Rectangle模式时使用TextBox来扩展左右Focused以告诉用户他们当前与此控件进行交互。
这是完整的风格。 ：）
<Style x:Key="HalfBorderTextBoxStyle" TargetType="TextBox">
<Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}" />
<Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}" />
<Setter Property="MinWidth" Value="{ThemeResource TextControlThemeMinWidth}" />
<Setter Property="MinHeight" Value="{ThemeResource TextControlThemeMinHeight}" />
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Hidden" />
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Hidden" />
<Setter Property="ScrollViewer.IsDeferredScrollingEnabled" Value="False" />
<Setter Property="BorderThickness" Value="0,0,0,2" />
<Setter Property="Padding" Value="8,5" />
<Setter Property="Foreground">
<Setter.Value>
<SolidColorBrush Color="White" />
</Setter.Value>
</Setter>
<Setter Property="Background">
<Setter.Value>
<SolidColorBrush Color="Transparent" />
</Setter.Value>
</Setter>
<Setter Property="BorderBrush">
<Setter.Value>
<SolidColorBrush Color="#FF8FBE19" />
</Setter.Value>
</Setter>
<Setter Property="SelectionHighlightColor">
<Setter.Value>
<SolidColorBrush Color="#FF8FBE19" />
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TextBox">
<Grid>
<Grid.Resources>
<Style x:Name="DeleteButtonStyle" TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid x:Name="ButtonLayoutGrid" BorderBrush="{ThemeResource TextBoxButtonBorderThemeBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{ThemeResource TextBoxButtonBackgroundThemeBrush}">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="GlyphElement">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAccentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="ButtonLayoutGrid">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAccentBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="GlyphElement">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltChromeWhiteBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<DoubleAnimation Duration="0" To="0" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="ButtonLayoutGrid" />
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<TextBlock x:Name="GlyphElement" AutomationProperties.AccessibilityView="Raw" Foreground="{ThemeResource SystemControlForegroundChromeBlackMediumBrush}" FontStyle="Normal" FontSize="12" FontFamily="{ThemeResource SymbolThemeFontFamily}" HorizontalAlignment="Center" Text="" VerticalAlignment="Center" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Grid.Resources>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.2" To="Focused">
<VisualTransition.GeneratedEasingFunction>
<ExponentialEase EasingMode="EaseIn" />
</VisualTransition.GeneratedEasingFunction>
<Storyboard>
<DoubleAnimation Duration="0:0:0.2" To="1.4" Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleY)" Storyboard.TargetName="LeftVerticalLine" d:IsOptimized="True" />
<DoubleAnimation Duration="0:0:0.2" To="1.4" Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleY)" Storyboard.TargetName="RightVerticalLine" d:IsOptimized="True" />
</Storyboard>
</VisualTransition>
<VisualTransition From="Focused" GeneratedDuration="0:0:0.2">
<VisualTransition.GeneratedEasingFunction>
<ExponentialEase EasingMode="EaseOut" />
</VisualTransition.GeneratedEasingFunction>
<Storyboard>
<DoubleAnimation Duration="0:0:0.2" To="1" Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleY)" Storyboard.TargetName="LeftVerticalLine" d:IsOptimized="True" />
<DoubleAnimation Duration="0:0:0.2" To="1" Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleY)" Storyboard.TargetName="RightVerticalLine" d:IsOptimized="True" />
</Storyboard>
</VisualTransition>
</VisualStateGroup.Transitions>
<VisualState x:Name="Disabled">
<VisualState.Setters>
<Setter Target="BorderElement.(UIElement.Opacity)" Value="1" />
</VisualState.Setters>
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="HeaderContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="BottomLine">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentElement">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledChromeDisabledLowBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Normal" />
<VisualState x:Name="PointerOver" />
<VisualState x:Name="Focused">
<VisualState.Setters>
<Setter Target="LeftVerticalLine.(UIElement.Opacity)" Value="1" />
<Setter Target="RightVerticalLine.(UIElement.Opacity)" Value="1" />
<Setter Target="LeftVerticalLine.(UIElement.RenderTransform).(CompositeTransform.ScaleY)" Value="1.4" />
<Setter Target="RightVerticalLine.(UIElement.RenderTransform).(CompositeTransform.ScaleY)" Value="1.4" />
</VisualState.Setters>
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity" Storyboard.TargetName="BackgroundElement">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextControlBackgroundFocusedOpacity}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="ButtonStates">
<VisualState x:Name="ButtonVisible">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="DeleteButton">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="ButtonCollapsed" />
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border x:Name="BackgroundElement" Background="{TemplateBinding Background}" Grid.ColumnSpan="2" Margin="{TemplateBinding BorderThickness}" Opacity="{ThemeResource TextControlBackgroundRestOpacity}" Grid.Row="1" Grid.RowSpan="1" />
<Rectangle x:Name="BottomLine" Grid.ColumnSpan="2" Grid.Row="1" Grid.RowSpan="1" VerticalAlignment="Bottom" Height="2" Fill="{TemplateBinding BorderBrush}" />
<Rectangle x:Name="LeftVerticalLine" HorizontalAlignment="Left" Height="4" Margin="0,0,0,2" Grid.Row="1" Stretch="Fill" UseLayoutRounding="True" VerticalAlignment="Bottom" Width="2" RenderTransformOrigin="0.5,1" Fill="{TemplateBinding BorderBrush}">
<Rectangle.RenderTransform>
<CompositeTransform />
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="RightVerticalLine" HorizontalAlignment="Right" Height="4" Margin="0,0,0,2" Grid.Row="1" Stretch="Fill" UseLayoutRounding="True" VerticalAlignment="Bottom" Width="2" RenderTransformOrigin="0.5,1" Grid.ColumnSpan="2" Fill="{TemplateBinding BorderBrush}">
<Rectangle.RenderTransform>
<CompositeTransform />
</Rectangle.RenderTransform>
</Rectangle>
<ContentPresenter x:Name="HeaderContentPresenter" Grid.ColumnSpan="2" ContentTemplate="{TemplateBinding HeaderTemplate}" Content="{TemplateBinding Header}" Foreground="{ThemeResource SystemControlForegroundBaseHighBrush}" FontWeight="Normal" Margin="0,0,0,8" Grid.Row="0" Visibility="Collapsed" x:DeferLoadStrategy="Lazy" />
<ScrollViewer x:Name="ContentElement" AutomationProperties.AccessibilityView="Raw" HorizontalScrollMode="{TemplateBinding ScrollViewer.HorizontalScrollMode}" HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}" IsTabStop="False" IsHorizontalRailEnabled="{TemplateBinding ScrollViewer.IsHorizontalRailEnabled}" IsVerticalRailEnabled="{TemplateBinding ScrollViewer.IsVerticalRailEnabled}" IsDeferredScrollingEnabled="{TemplateBinding ScrollViewer.IsDeferredScrollingEnabled}" Margin="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" Grid.Row="1" VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}" VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}" ZoomMode="Disabled" />
<ContentControl x:Name="PlaceholderTextContentPresenter" Grid.ColumnSpan="2" Content="{TemplateBinding PlaceholderText}" Foreground="{ThemeResource ButtonBackgroundThemeBrush}" IsHitTestVisible="False" IsTabStop="False" Margin="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" Grid.Row="1" />
<Button x:Name="DeleteButton" BorderThickness="{TemplateBinding BorderThickness}" Grid.Column="1" FontSize="{TemplateBinding FontSize}" IsTabStop="False" Margin="{ThemeResource HelperButtonThemePadding}" MinWidth="34" Grid.Row="1" Style="{StaticResource DeleteButtonStyle}" Visibility="Collapsed" VerticalAlignment="Stretch" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
答案 1 :(得分：2)
您可以使用LinearGradientBrush和四个GradientStop点来实现这一点：
<TextBox Background="WhiteSmoke" BorderThickness="3" Height="50" Width="200" VerticalAlignment="Center" HorizontalAlignment="Center">
<TextBox.BorderBrush>
<LinearGradientBrush EndPoint="1,1" StartPoint="1,0">
<GradientStop Color="White" Offset="0"/>
<GradientStop Color="White" Offset="0.75"/>
<GradientStop Color="Green" Offset="0.75"/>
<GradientStop Color="Green" Offset="1"/>
</LinearGradientBrush>
</TextBox.BorderBrush>
</TextBox>
这里是结果
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