我有一个显示信息的非交互式UI。信息保存在具有自定义listboxitem控件的Listbox控件中。
每个listboxitem的大小可以变化,窗口可以根据用户的要求调整大小。
我想阻止部分显示在应用程序中的listboxitems显示,这将始终是最后一行。但是,如果我调整用户界面的大小,那么最后一行'将改变。
我一直在试验this SO answer而没有任何运气。
protected override Size ArrangeOverride(Size finalSize)
{
// Arrange in a stack
double curX = 0;
double curY = 0;
foreach (UIElement child in InternalChildren)
{
double nextY = curY + child.DesiredSize.Height;
if (nextY > finalSize.Height) // Don't display partial items
child.Arrange(new Rect());
else
child.Arrange(new Rect(curX, curY, child.DesiredSize.Width, child.DesiredSize.Height));
curY = nextY;
}
return finalSize;
}
" InternalChildren"我假设是我的列表框,但Listbox不可枚举。我不确定如何使用这个例子。
如何达到预期效果?
主要控制
<UserControl x:Class="Cis.CustomControls.CisDeparturesPanel"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:customControls="clr-namespace:Cis.CustomControls"
mc:Ignorable="d" d:DesignHeight="600" d:DesignWidth="800">
<UserControl.Resources>
<DataTemplate x:Key="DataTemplate">
<ListBoxItem Padding="0" >
<customControls:CisDeparturesRow />
</ListBoxItem>
</DataTemplate>
</UserControl.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="48"/>
<RowDefinition Height="44"/>
<RowDefinition Height="229*"/>
<RowDefinition Height="279*" />
</Grid.RowDefinitions>
<ListBox Grid.Row="2" HorizontalContentAlignment="Stretch" Name="ListBoxDepart" Background="Black" Margin="1,0,-1,0" BorderThickness="0" ItemsSource="{Binding Path=StationMovementList}" ItemTemplate="{StaticResource DataTemplate}" ScrollViewer.VerticalScrollBarVisibility="Hidden" ScrollViewer.HorizontalScrollBarVisibility="Hidden" Grid.RowSpan="2">
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="Focusable" Value="False"/>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
</Grid>
</UserControl>
ListBoxItem自定义控件
<UserControl x:Class="Cis.CustomControls.CisDeparturesRow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d" d:DesignHeight="80" d:DesignWidth="800" Background="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type UserControl}}, Path=Background}" HorizontalContentAlignment="Stretch" Margin="0,0,0,0" Width="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type UserControl}}, Path=ActualWidth}">
<UserControl.Resources>
<!-- snip --->
</UserControl.Resources>
<Grid x:Name="ArrivalRowGrid">
<Grid.RowDefinitions>
<RowDefinition Height="47*"/>
<RowDefinition Height="33*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition Width="141"/>
<ColumnDefinition Width="117"/>
<ColumnDefinition Width="241"/>
</Grid.ColumnDefinitions>
<TextBlock Name="TxtDestinationName" MouseDown="TxtDestinationName_OnMouseDown" Style="{StaticResource MainRowStyle}" TextWrapping="Wrap" Text="{Binding Path=DestinationName,NotifyOnTargetUpdated=True, Mode=OneWay}" Margin="10,0"/>
<TextBlock Name="TxtPlatNum" TextWrapping="Wrap" Style="{StaticResource MainRowStyle}" Text="{Binding Path=Platform,NotifyOnTargetUpdated=True, Mode=OneWay}" Margin="11,0,8,0"
Grid.Row="0" Grid.Column="1"/>
<TextBlock Name="TxtArrTime" TextWrapping="Wrap" Style="{StaticResource MainRowStyle}" TextAlignment="Right" Text="{Binding Path=ExpectedDepartureTime,NotifyOnTargetUpdated=True, Mode=OneWay}" Margin="10,0,21,8"
Grid.Row="0" Grid.Column="3" />
<TextBlock Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="4" x:Name="TxtCallingAt" TextWrapping="Wrap" Style="{StaticResource SubRowStyle}" TextAlignment="Left" Text="{Binding Path=CallingAt,NotifyOnTargetUpdated=True, Mode=OneWay}" Margin="10,0,21,0" />
</Grid>
</UserControl>
答案 0 :(得分:0)
您链接的SO问题包含ArrangeOverride
方法,该方法适用于自定义Panel
,而不是ListBox
本身。
WPF ListBox
控件的模板,一旦展开,看起来就像这样(当然简化):
<Border>
<ScrollViewer>
<SomePanel>
<ListBoxItem>your item</ListBoxItem>
<ListBoxItem>your item</ListBoxItem>
<ListBoxItem>your item</ListBoxItem>
<ListBoxItem>etc</ListBoxItem>
</SomePanel>
</ScrollViewer>
</Border>
其中SomePanel
是从Panel
派生的类的实例。列表框的默认值是VirtualizingStackPanel
,但可以像这样替换:
<ListBox>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
your panel type here
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
你在问题中说这是一个“非交互式用户界面”。这有几种不同的解释,但暗示我可以用ListBox
替换ItemsControl
,因为您不需要列表框的选择功能。然后创建一个自定义面板(一个派生自Panel
的类),从链接的SO问题中添加ArrangeOverride
方法,并将ItemControl
面板替换为自定义面板。