WPF 键盘导航附加属性解决TreeView的Tab导航焦点问题
2021-03-07 04:28
标签：rsa add image ice traversal grid handle ati 模板
TreeView是默认对上下左右响应，或者是Ctrl+Tab。 如果单独用tab则是不起作用的。 如果使用一般treeview可以利用以下方式来让tab进行导航。 设置Treeview和TreeviewItem的KeyboardNavigation treeview treeviewitem 其次是对treeviewitem模板内部的border设置Focusable ContentPresenter x:Name="PART_Header" ContentSource="Header" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
如果还是进不去TreeViewItem的内部，还可以使用一下附加属性 在TreeViewItem的内部使用即可 简单版本 WPF 键盘导航附加属性解决TreeView的Tab导航焦点问题 标签：rsa add image ice traversal grid handle ati 模板 原文地址：https://www.cnblogs.com/lonelyxmas/p/12833884.html Setter Property="KeyboardNavigation.TabNavigation" Value="Local"/>
Setter Property="KeyboardNavigation.TabNavigation" Value="Local" />
Border x:Name="Bd" Focusable="True" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="1" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
Border>
public static readonly DependencyProperty TabProperty = DependencyProperty.RegisterAttached("Tab", typeof(bool), typeof(TabTest), new PropertyMetadata(new PropertyChangedCallback(OnValueChanged)));
public static bool GetTab(DependencyObject d) => (bool)d.GetValue(TabProperty);
public static void SetTab(DependencyObject d, bool value) => d.SetValue(TabProperty, value);
private static void OnValueChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (d != null && ((bool)e.NewValue))
{
(d as UIElement).Focusable = true;
(d as UIElement).PreviewKeyDown += TabTest_PreviewKeyDown;
}
}
private static void TabTest_PreviewKeyDown(object sender, KeyEventArgs e)
{
var Element = Keyboard.FocusedElement as UIElement;
if (e.Key == Key.Tab)
{
e.Handled = true;
if (!Element.MoveFocus(new TraversalRequest(FocusNavigationDirection.Down)))
{
Element.MoveFocus(new TraversalRequest(FocusNavigationDirection.Next));
}
}
}
ItemsPresenter x:Name="ItemsHost" local:TabTest.Tab="True" Grid.ColumnSpan="2" Grid.Column="1" Grid.Row="1" />
文章标题：WPF 键盘导航附加属性解决TreeView的Tab导航焦点问题
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