Question

我重写了ListBoxItems＆amp;的默认模板。列表框。这里是MainWindow.xaml

<Window x:Class="NestedBindingTry.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Loaded="Window_Loaded"
    Title="MainWindow" Height="350" Width="525">
<Grid>
    <Grid.Resources>
        <Style TargetType="ListBox">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ListBox">
                                <StackPanel 
                                            IsItemsHost="True"
                                            FocusManager.IsFocusScope="False"
                                            />
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Grid.Resources>
    <StackPanel FocusManager.IsFocusScope="True"
                KeyboardNavigation.ControlTabNavigation="Cycle"
                KeyboardNavigation.DirectionalNavigation="Cycle">
        <StackPanel>
            <CheckBox Content="SelectAll" />
        </StackPanel>
        <ListBox SelectionMode="Multiple" Name="M" ItemsSource="{Binding}" FocusManager.IsFocusScope="False">
            <ListBox.Resources>
                <Style TargetType="ListBoxItem">
                    <Setter Property="Template">
                        <Setter.Value>
                            <ControlTemplate TargetType="ListBoxItem">
                                <Grid>
                                    <VisualStateManager.VisualStateGroups>                                        
                                        <VisualStateGroup x:Name="SelectionStates">
                                            <VisualState x:Name="Unselected">
                                                <Storyboard>
                                                    <BooleanAnimationUsingKeyFrames Storyboard.TargetName="CheckBox"
                                                                                    Storyboard.TargetProperty="IsChecked">
                                                        <DiscreteBooleanKeyFrame KeyTime="0"
                                                                                 Value="False" />
                                                    </BooleanAnimationUsingKeyFrames>
                                                </Storyboard>
                                            </VisualState>
                                            <VisualState x:Name="Selected">
                                                <Storyboard>
                                                    <BooleanAnimationUsingKeyFrames Storyboard.TargetName="CheckBox"
                                                                                    Storyboard.TargetProperty="IsChecked">                                                    
                                                        <DiscreteBooleanKeyFrame KeyTime="0"
                                                                                 Value="True" />
                                                    </BooleanAnimationUsingKeyFrames>
                                                </Storyboard>
                                            </VisualState>
                                            <VisualState x:Name="SelectedUnfocused">
                                                <Storyboard>
                                                    <BooleanAnimationUsingKeyFrames Storyboard.TargetName="CheckBox"
                                                                                    Storyboard.TargetProperty="IsChecked">
                                                        <DiscreteBooleanKeyFrame KeyTime="0"
                                                                                 Value="True" />
                                                    </BooleanAnimationUsingKeyFrames>
                                                </Storyboard>
                                            </VisualState>
                                        </VisualStateGroup>
                                    </VisualStateManager.VisualStateGroups>
                                    <CheckBox Focusable="False"
                                              Name="CheckBox"
                                              Content="{Binding}"
                                              Checked="CheckBox_Checked"
                                              Unchecked="CheckBox_Unchecked"
                                              VerticalAlignment="Center" 
                                              Margin="0,0,3,0" />
                                </Grid>
                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                </Style>
            </ListBox.Resources>
        </ListBox>
    </StackPanel>
</Grid>
</Window>

这里是CodeWehind MainWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace NestedBindingTry
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        this.DataContext = new List<string>() { "123", "546", "789"};
    }

    private void CheckBox_Checked(object sender, RoutedEventArgs e)
    {
        CheckBox bik = sender as CheckBox;
        DependencyObject dob = bik as DependencyObject;
        while (dob.GetType() != typeof(ListBox))
        {
            dob = VisualTreeHelper.GetParent(dob);
        }
        ListBox my = dob as ListBox;
        if (!my.SelectedItems.Contains(bik.DataContext))
            my.SelectedItems.Add(bik.DataContext);
    }

    private void CheckBox_Unchecked(object sender, RoutedEventArgs e)
    {
        CheckBox bik = sender as CheckBox;
        DependencyObject dob = bik as DependencyObject;
        while (dob.GetType() != typeof(ListBox))
        {
            dob = VisualTreeHelper.GetParent(dob);
        }
        ListBox my = dob as ListBox;
        if (my.SelectedItems.Contains(bik.DataContext))
            my.SelectedItems.Remove(bik.DataContext);
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        this.M.SelectedItems.Add(((IList<string>)this.DataContext)[0]);
        this.M.SelectedItems.Add(((IList<string>)this.DataContext)[2]);
    }
}
}

我想要实现的主要思想是创建可检查的ListBox。我希望拥有的一项功能是Select All CheckBox。但这里的问题。 SelectAll CheckBox未放置在ListBox内。所以它在它之下。

我希望焦点像SelectAll CheckBox一样放在ListBox内。这意味着，当我点击标签键时，焦点应该转到下一个CheckBox。在我的例子中，如果ListBox有多个项目，它只是改变两个CheckBox之间的焦点 - 在SelectAll CheckBox和第一个ListBox项之间。但我希望它归结为下一个ListBox项目。我尝试使用FocusManager's属性，但没有任何反应。有什么建议......？

Bad focus example

Answer 1

使用ItemsControl代替ListBox ....来自ListBox基类的Selector来自此Control + Up / Down Arrow，这个类以某种方式覆盖基于Tab的简单焦点，其项目为{{{ 1}}在ItemsPanel。

当我使用ItemsControl时，它有效。

循环焦点问题 -

1 个答案: