我在我写的WPF应用程序中创建了一个TabControl。我重新模板化TabItem,以便我可以在每个标签页上有一个按钮来关闭它。到目前为止,一切都很好。
我决定我现在想要闪亮的圆形按钮而不是默认的方形丑陋的东西。此外,我想使用图像作为我的按钮内容,而不是简单地将内容设置为“X”。
我的XAML样式/模板:
<Style TargetType="{x:Type Button}" x:Key="EllipseButtonStyle">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Grid>
<Ellipse Fill="{TemplateBinding Background}"
Stroke="{TemplateBinding BorderBrush}"
StrokeThickness="{TemplateBinding BorderThickness}"
Width="{TemplateBinding Width}"
Height="{TemplateBinding Height}"/>
<ContentPresenter HorizontalAlignment="Center"
VerticalAlignment="Center"
Content="{TemplateBinding Button.Content}"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<DataTemplate x:Key="ClosableTabItemTemplate">
<DockPanel MinWidth="120" Margin="0,0,0,0">
<ContentPresenter
Content="{Binding Path=DisplayName}"
VerticalAlignment="Center"
HorizontalAlignment="Left"/>
<Button
Command="{Binding Path=UnSubscribeApplicationCommand}"
CommandParameter="{Binding Path=DisplayName}"
BorderBrush="Black"
BorderThickness="2"
VerticalContentAlignment="Center"
VerticalAlignment="Center"
HorizontalAlignment="Right"
DockPanel.Dock="Right"
Width="16" Height="16">
<Image Source="closeicon.bmp" Height="8" Width="8"
VerticalAlignment="Center" HorizontalAlignment="Center"/>
<Button.Style>
<Style TargetType="{x:Type Button}"
BasedOn="{StaticResource EllipseButtonStyle}">
<Setter Property="Background"
Value="{StaticResource CloseOffButtonBrush}"/>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="{StaticResource CloseOnButtonBrush}"/>
</Trigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
</DockPanel>
</DataTemplate>
然而,在上面的代码到位后,选定的标签内容(以及背景)似乎向上移动,因为我假设TabItems内容由于被选中而向上移动。那么,为什么椭圆不随其他内容移动?任何人都知道这里发生了什么?
答案 0 :(得分:1)
对于延迟回复感到抱歉 - 我最后通过在this blogpost中发布的TabItem模板之后对其进行建模来解决问题。我认为这个问题浮出水面是因为我的TabItem模板被定义为DataTemplate,而不是像它应该的ControlTemplate。这是新模板:
<ControlTemplate x:Key="ClosableTabItemTemplate" TargetType="TabItem">
<Grid SnapsToDevicePixels="true">
<Border x:Name="Bd" Background="{StaticResource TabItemUnselectedBrush}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="1,1,1,0" >
<DockPanel x:Name="ContentPanel">
<Button Command="{Binding Path=UnSubscribeApplicationCommand}" BorderBrush="Black" HorizontalAlignment="Center" Margin="3,0,3,0" VerticalAlignment="Center" Width="16" Height="16" DockPanel.Dock="Right" ToolTip="Close Tab">
<Button.Content>
<Image Source="pack://application:,,,/Resources/Close.png" Height="8" Width="8" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Button.Content>
<Button.Style>
<Style TargetType="{x:Type Button}" BasedOn="{StaticResource EllipseButtonStyle}">
<Setter Property="Background" Value="{StaticResource CloseOffButtonBrush}"/>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="{StaticResource CloseOnButtonBrush}"/>
</Trigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
<ContentPresenter x:Name="Content" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" Content="{Binding Path=DisplayName}" RecognizesAccessKey="True" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="{TemplateBinding Padding}"/>
</DockPanel>
</Border>
</Grid>
<!-- bunch of ControlTemplate triggers to style the TabItem background color/position -->
</ControlTemplate>
答案 1 :(得分:0)
每当我在DockPanel中有控件时,如果我明确地将DockPanel.Dock附加到其中的一个控件来到我想要占据填充部分的元素之后,它总是会出现。虽然我不知道这是否会回答您的问题,但请在您的ClosableTabItemTemplate DataTemplate中尝试:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<ContentPresenter Grid.Column="0"/>
<Button Grid.Column="1"/>
</Grid>