我正在尝试让 UserControl 正确地制表并感到困惑。逻辑树如下所示。
|-Window
-Grid
-TabControl
-TabItem
-StackPanel
-MyUserControl
|-StackPanel
-GroupBox
-Grid
-ComboBox
-Textbox1
-Textbox2
Everything works fine, except when the visibility converter for the ComboBox returns Visibility.Collapsed
(don't allow user to change database mode), then when textbox1 is selected, instead of being able to tab through the controls in the UserControl, the focus shifts to a button在窗口底部声明。除了显示的控件之外,没有其他任何东西都设置了 TabIndex 或 FocusManager 属性。
我正用头撞砖墙,我一定错过了什么。我尝试过 IsFocusScope=True/False,使用 FocusedElement,如果 ComboBox 不可见(Visibility.Collapsed
),则没有任何效果。
<Window x:Class="MyNamespace.Client.WinInstaller"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
FocusManager.FocusedElement="{Binding ElementName=tabWizard}">
<Window.Resources>
<props:Settings x:Key="settings" />
</Window.Resources>
<Grid Grid.IsSharedSizeScope="True">
<!-- row and column definitions omitted -->
<loc:SmallHeader Grid.Row="0" x:Name="headerBranding" HeaderText="Setup" />
<TabControl x:Name="tabWizard" DataContext="{StaticResource settings}" SelectedIndex="0" FocusManager.IsFocusScope="True">
<TabItem x:Name="tbStart" Height="0">
<StackPanel>
<TextBlock Text="Database Mode"/>
<loc:DatabaseSelector x:Name="dbSelector" AllowChangeMode="False" TabIndex="1"
AvailableDatabaseModes="SQLServer" IsPortRequired="False"
DatabaseMode="{Binding Default.DbMode,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
DatabasePath="{Binding Default.DatabasePath,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
</StackPanel>
</TabItem>
...
用户控件的顶部如下:
<UserControl x:Class="MyNamespace.Client.DatabaseSelector"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Name="root"
FocusManager.IsFocusScope="True"
FocusManager.FocusedElement="{Binding ElementName=cboDbMode}">
<UserControl.Resources>
<conv:DatabaseModeIsFileBased x:Key="DatabaseModeIsFileBased"/>
<BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
</UserControl.Resources>
<StackPanel DataContext="{Binding}">
<GroupBox>
<Grid>
<!-- row and column definitions omitted -->
<Label Content="Database Mode"/>
<ComboBox x:Name="cboDbMode" SelectedValue="{Binding ElementName=root,Path=DatabaseMode,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
DisplayMemberPath="Value" SelectedValuePath="Key" TabIndex="1" Visibility="{Binding AllowChangeMode,ElementName=root,Converter={StaticResource BooleanToVisibilityConverter}}" />
<!-- AllowChangeMode is a DependencyProperty on the UserControl -->
<Grid><!-- row and column definitions omitted -->
<Label "Host"/>
<TextBox x:Name="txtDBHost" Text="{Binding ElementName=root,Path=DatabaseHost,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" TabIndex="2" />
<TextBox x:Name="txtDBPort" Text="{Binding ElementName=root,Path=DatabasePortString,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" TabIndex="3" />