问题描述
ListViewItem 样式不能触发 Unselected，但可以触发 Selected.
The ListViewItem style cant trigger Unselected but can trigger Selected.
我想看到在选择 listView 项时显示的内容，以及在未选择时隐藏的内容.
I want to see someThing showed when the listView item be selected and hid when unselected.
但是我可以看到它被显示了，但看不到它被隐藏了.
But I can see that it was shown, but could not see it being hidden.
我从 https://msdn 复制样式.microsoft.com/en-us/library/windows/apps/mt299136.aspx
我确定我将 SelectionMode 设置为 Single.
And I sure I set the SelectionMode is Single.
我复制的代码是
<Style x:Key="ListViewItemStyle" TargetType="ListViewItem">
<Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}"/>
<Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}"/>
<Setter Property="Background" Value="{ThemeResource ListViewItemBackground}"/>
<Setter Property="Foreground" Value="{ThemeResource ListViewItemForeground}"/>
<Setter Property="TabNavigation" Value="Local"/>
<Setter Property="IsHoldingEnabled" Value="True"/>
<Setter Property="Padding" Value="12,0,12,0"/>
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="MinWidth" Value="{ThemeResource ListViewItemMinWidth}"/>
<Setter Property="MinHeight" Value="{ThemeResource ListViewItemMinHeight}"/>
<Setter Property="AllowDrop" Value="False"/>
<Setter Property="UseSystemFocusVisuals" Value="True"/>
<Setter Property="FocusVisualMargin" Value="0"/>
<Setter Property="FocusVisualPrimaryBrush" Value="{ThemeResource ListViewItemFocusVisualPrimaryBrush}"/>
<Setter Property="FocusVisualPrimaryThickness" Value="2"/>
<Setter Property="FocusVisualSecondaryBrush" Value="{ThemeResource ListViewItemFocusVisualSecondaryBrush}"/>
<Setter Property="FocusVisualSecondaryThickness" Value="1"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListViewItem">
<Grid>
<ContentPresenter ></ContentPresenter>
<Button x:Name="b" Opacity="0"></Button>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="SelectionStates">
<VisualState x:Name="Unselecting">
<Storyboard BeginTime="0:0:0">
<DoubleAnimation Storyboard.TargetName="b"
Storyboard.TargetProperty="Opacity"
Duration="0:0:0.1"
To="0" />
</Storyboard>
</VisualState>
<VisualState x:Name="Unselected">
<Storyboard BeginTime="0:0:0">
<DoubleAnimation Storyboard.TargetName="b"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="0" />
</Storyboard>
</VisualState>
<VisualState x:Name="Selected">
<Storyboard BeginTime="0:0:0">
<DoubleAnimation Storyboard.TargetName="b"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
我已经看到这个答案 https://stackoverflow.com/a/36010296/6116637 Archana 提供了一种方法使用 CustomUnselected 并在 SelectionChanged 时更改它.
I have seen this answer https://stackoverflow.com/a/36010296/6116637 that Archana offered a way that use CustomUnselected and change it when SelectionChanged.
这是一个好方法，但我不想将相同的代码写到很多地方，因为我有很多 ListView 应该这样做.有没有什么好的方法可以只写 xaml?
It's a good way but I dont want to write the same code to lot of place for I have many ListView should do it.Are there any good way to do it only write xaml?
我已经看到说绑定到 IsSelected 的答案，但是当我想要 TemplateBinding 的 Visibility 不能使用 convert 时，TemplateBinding 不能这样做.
I have seen the answer that say binding to IsSelected but the TemplateBinding cant do it when I want to Visibility for the TemplateBinding cant use convert.
当我使用 Visibility="{Binding Path={TemplateBinding IsSelected},Converter={StaticResource BooleanVisibility},Mode=OneWay}" 或 Visibility="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=IsSelected,Converter={StaticResource BooleanInverseVisibility},Mode=OneWay}" ，结果不是我想要的.
And when I use the Visibility="{Binding Path={TemplateBinding IsSelected},Converter={StaticResource BooleanVisibility},Mode=OneWay}" or Visibility="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=IsSelected,Converter={StaticResource BooleanInverseVisibility},Mode=OneWay}" , the result is not what I want.
请参阅:https://stackoverflow.com/a/40328520/6116637
推荐答案
创建逆可见性转换器:
public class BooleanInverseVisibilityConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, string language)
{
return (bool)value ? Visibility.Collapsed : Visibility.Visible;
}
public object ConvertBack(object value, Type targetType, object parameter, string language)
{
return (Visibility)value != Visibility.Visible;
}
}
正确时折叠，错误时显示.
This collapses when it's true and shows when it's false.
Visibility="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=IsSelected,Converter={StaticResource BooleanInverseVisibility},Mode=OneWay}"
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