也许我漏掉了什么,但我找不到任何简单的方法来做到这一点。以下是您可以执行的大致步骤:
<ListView.InputBindings>
<KeyBinding Key="Tab" Command=""
CommandParameter="}" />
<KeyBinding Modifiers="Shift" Key="Tab" Command=""
CommandParameter="}" />
</ListView.InputBindings>
<ListView.ItemContainerStyle>
<Style TargetType="">
<EventSetter Event="Selected" Handler="ItemSelected" />
</Style>
</ListView.ItemContainerStyle>
<ListView.View>
<GridView>
<GridViewColumn Header="number" />
<GridViewColumn Header="Selector">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Name="_tb" Text=""/>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
我在这里做的事情:
- 重写选项卡行为,以触发命令选择另一个项目
- 添加事件处理程序到选定事件,以便将焦点放在文本框上
- 给文本框命名,以便能够找到并聚焦
代码:
private readonly ICommand _GoToNextItem = new Command((p) =>
{
var lv = p as ListView;
if (lv.SelectedIndex == -1 || lv.SelectedIndex == lv.Items.Count - 1)
{
lv.SelectedIndex = 0;
}
else
{
lv.SelectedIndex++;
}
});
public ICommand GoToNextItem { get { return _GoToNextItem; } }
private readonly ICommand _GoToPreviousItem = new Command((p) =>
{
var lv = p as ListView;
if (lv.SelectedIndex <= 0)
{
lv.SelectedIndex = lv.Items.Count - 1;
}
else
{
lv.SelectedIndex--;
}
});
public ICommand GoToPreviousItem { get { return _GoToPreviousItem; } }
private void ItemSelected(object sender, RoutedEventArgs e)
{
var item = sender as ListBoxItem;
(FindNamedChild(item, "_tb") as TextBox).Focus();
}
public static object FindNamedChild(DependencyObject container, string name)
{
if (container is FrameworkElement)
{
if ((container as FrameworkElement).Name == name) return container;
}
var ccount = VisualTreeHelper.GetChildrenCount(container);
for (int i = 0; i < ccount; i++)
{
var child = VisualTreeHelper.GetChild(container, i);
var target = FindNamedChild(child, name);
if (target != null)
{
return target;
}
}
return null;
}
这是非常简略的,使用任何部分都有风险。(我认为聚焦也可以通过其他方式实现,而不必引入选择)
(Command
类只是一个通用的ICommand
实现,它接受一个在接口的Execute
方法中执行的lambda表达式)