Question

我需要相对于子项移动切换按钮。它根本没有移动和父项目。它与父母和儿童项目混淆。这是我的源代码。

<Style TargetType="{x:Type TreeViewItem}">
        <Setter Property="MinHeight" Value="25" />
        <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
        <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
        <Setter Property="FontWeight" Value="SemiBold"/>
        <Setter Property="FocusVisualStyle" Value="{x:Null}" />
        <Setter Property="SnapsToDevicePixels" Value="True" />
        <Setter Property="Margin" Value="0,0,0,2"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TreeViewItem}">
                    <StackPanel>
                        <Border x:Name="Bd" 
                            Padding="0,0,0,0"
                            MinHeight="{TemplateBinding MinHeight}" UseLayoutRounding="True"
                            SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}">
                            <Border.Background>
                                <SolidColorBrush  Color="#FFCECEC6" Opacity="1"/>
                            </Border.Background>
                            <Grid 
                              Background="Transparent" VerticalAlignment="Stretch">
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition MinWidth="19" Width="Auto" />
                                    <ColumnDefinition Width="*" />
                                </Grid.ColumnDefinitions>
                                <ToggleButton x:Name="Expander" Style="{StaticResource ExpandCollapseToggleStyle}"
                                          IsChecked="{Binding Path=IsExpanded, RelativeSource={x:Static RelativeSource.TemplatedParent}, Mode=TwoWay}"
                                          ClickMode="Press" />
                                <ContentPresenter x:Name="PART_Header" Grid.Column="1" ContentSource="Header" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                                        HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
                            </Grid>
                        </Border>
                        <ItemsPresenter x:Name="ItemsHost" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                    </StackPanel>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsExpanded" Value="False">
                            <Setter TargetName="ItemsHost" Property="Visibility" Value="Collapsed" />
                        </Trigger>

                        <Trigger Property="HasItems" Value="False">
                            <Setter TargetName="Expander" Property="Visibility" Value="Hidden" />
                        </Trigger>

                        <Trigger SourceName="Bd" Property="IsMouseOver" Value="True">
                            <Setter TargetName="Bd" Property="Background">
                                <Setter.Value>
                                    <SolidColorBrush Color="#FF5A5A56" Opacity="0.8" />
                                </Setter.Value>
                            </Setter>
                            <Setter Property="Foreground" Value="White"/>
                        </Trigger>
                        <Trigger Property="IsSelected" Value="True">
                            <Setter TargetName="Bd" Property="Background">
                                <Setter.Value>
                                    <SolidColorBrush Color="#FF5A5A56" Opacity="1" />
                                </Setter.Value>
                            </Setter>
                            <Setter Property="Foreground" Value="White"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter Property="Foreground" Value="{DynamicResource HoverBrush}" />
                        </Trigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsSelected" Value="True" />
                                <Condition Property="Selector.IsSelectionActive" Value="True" />
                            </MultiTrigger.Conditions>
                            <Setter TargetName="Bd" Property="Background" Value="#FF5A5A56" />
                        </MultiTrigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsSelected" Value="True" />
                                <Condition Property="Selector.IsSelectionActive" Value="False" />
                            </MultiTrigger.Conditions>
                            <Setter TargetName="Bd" Property="Background" Value="#FF5A5A56" />
                        </MultiTrigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
            <Trigger Property="VirtualizingStackPanel.IsVirtualizing" Value="True">
                <Setter Property="ItemsPanel">
                    <Setter.Value>
                        <ItemsPanelTemplate>
                            <VirtualizingStackPanel />
                        </ItemsPanelTemplate>
                    </Setter.Value>
                </Setter>
            </Trigger>
        </Style.Triggers>
    </Style>

以同样的方式放置父项和子项。

Answer 1

我不确定您要尝试实现的目标，但是，更改此部分应该可以正常运行：

<ToggleButton Grid.RowSpan="2" VerticalAlignment="Center" x:Name="Expander" Style="{StaticResource ExpandCollapseToggleStyle}"
                                      IsChecked="{Binding Path=IsExpanded, RelativeSource={x:Static RelativeSource.TemplatedParent}, Mode=TwoWay}"
                                      ClickMode="Press" />

注意Grid.RowSpan="2" VerticalAlignment="Center"部分请注意，您可能希望更改Margin或其他一些属性以更改其位置。

TreeViewItem切换不随子项移动

1 个答案: