我正在寻找的行为基本上是DockPanel的行为,我希望最后一个孩子填满可用空间。问题是我希望它成为最后一个可见的孩子。在我的情况下,我有两个意见,我想并排显示。
到目前为止,我尝试将两种不同的样式应用于网格,似乎都不起作用。我也试过使用似乎在理论上工作的转换器(我能够返回" Auto"使用double.NaN),但我不确定如何返回" *"来自代码。
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*">
<ColumnDefinition.Style>
<Style TargetType="{x:Type ColumnDefinition}">
<Style.Triggers>
<DataTrigger Binding="{Binding Visibility, ElementName=ccSomeItems}" Value="Collapsed">
<Setter Property="Width" Value="0" />
</DataTrigger>
</Style.Triggers>
</Style>
</ColumnDefinition.Style>
</ColumnDefinition>
<ColumnDefinition Width="*">
<ColumnDefinition.Style>
<Style TargetType="{x:Type ColumnDefinition}">
<Style.Triggers>
<DataTrigger Binding="{Binding SomeOtherItems.AllOtherItems.Count, Converter={StaticResource IntegerToVisibilityConverter}}" Value="Collapsed">
<Setter Property="Width" Value="0" />
</DataTrigger>
</Style.Triggers>
</Style>
</ColumnDefinition.Style>
</ColumnDefinition>
</Grid.ColumnDefinitions>
<ContentControl x:Name="ccSomeItems" Content="{Binding SomeItems}" Margin="4" Visibility="{Binding SomeItems.AllItems.Count, Converter={StaticResource IntegerToVisibilityConverter}}" />
<ContentControl Grid.Column="1" Content="{Binding SomeOtherItems}" Margin="4" Visibility="{Binding SomeOtherItems.AllOtherItems.Count, Converter={StaticResource IntegerToVisibilityConverter}}" />
</Grid>
答案 0 :(得分:0)
我能够使用Rachel的评论运行并找到使用转换器的解决方案。
XAML:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="{Binding Visibility, ElementName=SomeItems, Converter={StaticResource VisibilityToGridLengthConverter}}" />
<ColumnDefinition Width="{Binding Visibility, ElementName=SomeOtherItems, Converter={StaticResource VisibilityToGridLengthConverter}}" />
</Grid.ColumnDefinitions>
<ContentControl x:Name="SomeItems" Content="{Binding SomeItems}" Visibility="{Binding SubPackages.AllPackages.Count, Converter={StaticResource IntegerToVisibilityConverter}}" />
<ContentControl x:Name="SomeOtherItems" Grid.Column="1" Content="{Binding SomeOtherItems}" Visibility="{Binding Elements.AllElements.Count, Converter={StaticResource IntegerToVisibilityConverter}}" />
</Grid>
转换器:
[ValueConversion(typeof(Visibility), typeof(GridLength))]
public class VisibilityToGridLengthConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return (Visibility)value == Visibility.Collapsed ? new GridLength(0) : new GridLength(1, GridUnitType.Star);
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
答案 1 :(得分:0)
我发现了一个更简单的解决方案,就是用Grid元素包围要填充可用空间的元素。因此,使网格成为始终填充可用空间的最后一个元素。可以将网格内的控件的可见性设置为所需的任意值。
_rec_name = 'sub_heads'