wpf组合框IsFocused触发器不工作
当组合框获得键盘焦点时,我尝试使用以下代码更改边框颜色:wpf组合框IsFocused触发器不工作,wpf,c#-4.0,Wpf,C# 4.0,当组合框获得键盘焦点时,我尝试使用以下代码更改边框颜色: <Style TargetType="{x:Type ComboBox}"> <Setter Property="Foreground" Value="{DynamicResource TextBrush}" /> <Setter Property="Background" Value="{DynamicResource WindowBrush}" /> <Setter P
<Style TargetType="{x:Type ComboBox}">
<Setter Property="Foreground" Value="{DynamicResource TextBrush}" />
<Setter Property="Background" Value="{DynamicResource WindowBrush}" />
<Setter Property="SnapsToDevicePixels" Value="true" />
<!--<Setter Property="Template" Value="{DynamicResource ComboBoxTemplate}" />-->
<Setter Property="IsEditable" Value="False"/>
<Style.Triggers>
<Trigger Property="IsKeyboardFocusWithin" Value="True">
<Setter Property="BorderBrush" Value="{DynamicResource FocusedOnSolidBorderBrush}" />
<Setter Property="BorderThickness" Value="2" />
</Trigger>
</Style.Triggers>
</Style>
这个很好用。
但是,如果我使用如下的控件模板,它将停止工作。边框颜色更改将不再显示
<ControlTemplate x:Key="ComboBoxTemplate" TargetType="{x:Type ComboBox}">
<Grid x:Name="grid">
<ToggleButton Grid.Column="2" x:Name="ToggleButton" Focusable="False" IsChecked="{Binding Path=IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" ClickMode="Press" />
<ContentPresenter HorizontalAlignment="Left" Margin="3,3,23,3" x:Name="ContentSite" Focusable="False" VerticalAlignment="Center" Content="{TemplateBinding SelectionBoxItem}" ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}" ContentTemplateSelector="{TemplateBinding ItemTemplateSelector}" IsHitTestVisible="False" />
<Popup IsOpen="{TemplateBinding IsDropDownOpen}" Placement="Bottom" x:Name="Popup" Focusable="False" AllowsTransparency="True" PopupAnimation="Slide">
<Grid MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{TemplateBinding ActualWidth}" x:Name="DropDown" SnapsToDevicePixels="True">
<Border x:Name="DropDownBorder" Background="{DynamicResource ControlBackgroundBrush}" CornerRadius="3,3,3,3" />
<ScrollViewer Margin="4,6,4,6" Style="{DynamicResource NuclearScrollViewer}" SnapsToDevicePixels="True" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" CanContentScroll="True" Foreground="{DynamicResource {x:Static SystemColors.ActiveCaptionTextBrushKey}}">
<StackPanel IsItemsHost="True" KeyboardNavigation.DirectionalNavigation="Contained" />
</ScrollViewer>
</Grid>
</Popup>
</Grid>
<ControlTemplate.Triggers>
</ControlTemplate.Triggers>
</ControlTemplate>
模板中的某些内容似乎覆盖了组合框样式中指定的触发器。
谁能告诉我控制模板的哪一部分需要更改,为什么
谢谢,您的新
控制模板
没有定义边框,也没有绑定到边框笔刷
和边框厚度
属性,因此当焦点改变时,您显然看不到边框和边框
换句话说,触发器仍能正常工作并按预期更改属性值,但没有绑定到新值的UI元素。您可以通过在控件模板中添加边框并绑定到这些属性来轻松修复此问题。例如:
<ControlTemplate x:Key="ComboBoxTemplate" TargetType="{x:Type ComboBox}">
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
<Grid x:Name="grid">
<!-- ... -->
</Grid>
</Border>
</ControlTemplate>
Adi,谢谢你的回答。它工作得很好。我学到了一些新东西。非常感谢你的帮助。