WrapPanel

Последующее размещение происходит последовательно сверху вниз или справа налево, в зависимости от значения свойства «Ориентация».

Дочерние элементы управления WrapPanel расположены в зависимости от ориентации, горизонтальных позиций (по умолчанию) слева направо и вертикальной ориентации, расположенных сверху вниз, и после достижения максимальной ширины или высоты элемент управления автоматически создает строку или столбец на основе ориентации.

Интервалы можно автоматически добавлять между элементами с помощью свойств HorizontalSpacing и VerticalSpacing. Если ориентация является горизонтальной, HorizontalSpacing добавляет равномерное горизонтальное интервал между каждым отдельным элементом, и VerticalSpacing добавляет равномерное интервал между каждой строкой элементов.

Если ориентация вертикальная, HorizontalSpacing добавляет равномерное интервал между каждым столбцом элементов, а VerticalSpacing добавляет равномерное вертикальное интервал между отдельными элементами.

<!--  Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the LICENSE file in the project root for more information.  -->
<Page x:Class="PrimitivesExperiment.Samples.WrapPanelSample"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:attributes="using:CommunityToolkit.Tooling.SampleGen.Attributes"
      xmlns:controls="using:CommunityToolkit.WinUI.Controls"
      xmlns:local="using:PrimitivesExperiment.Samples"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
      xmlns:muxc="using:Microsoft.UI.Xaml.Controls"
      x:Name="ThisSamplePage">

    <Page.Resources>
        <DataTemplate x:Key="PhotoTemplate">
            <Grid Width="{Binding Width}"
                  Height="{Binding Height}"
                  Margin="0">
                <Image HorizontalAlignment="Center"
                       Stretch="UniformToFill">
                    <Image.Source>
                        <BitmapImage DecodePixelHeight="200"
                                     UriSource="{Binding Thumbnail}" />
                    </Image.Source>
                </Image>
                <Border VerticalAlignment="Bottom">
                    <Border.Background>
                        <LinearGradientBrush EndPoint="0,1">
                            <GradientStop Offset="0" Color="Transparent" />
                            <GradientStop Offset="1" Color="#33000000" />
                        </LinearGradientBrush>
                    </Border.Background>
                    <TextBlock Margin="5,20,5,5"
                               VerticalAlignment="Bottom"
                               Foreground="White"
                               Text="{Binding Category}" />
                </Border>
            </Grid>
        </DataTemplate>
        <Style TargetType="ListViewItem">
            <!--  Change those values to change the WrapPanel's children alignment  -->
            <Setter Property="VerticalContentAlignment" Value="Center" />
            <Setter Property="HorizontalContentAlignment" Value="Center" />
            <Setter Property="Margin" Value="0" />
            <Setter Property="Padding" Value="0" />
            <Setter Property="MinWidth" Value="0" />
            <Setter Property="MinHeight" Value="0" />
        </Style>
    </Page.Resources>

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <StackPanel Orientation="Horizontal"
                    Spacing="4">
            <Button Click="AddButton_Click"
                    Content="Add random sized image" />
            <Button Click="AddFixedBtn_Click"
                    Content="Add fixed sized image" />
            <Button Click="SwitchBtn_Click"
                    Content="Switch Orientation" />
        </StackPanel>
        <ListView Name="WrapPanelContainer"
                  Grid.Row="1"
                  IsItemClickEnabled="True"
                  ItemClick="ItemControl_ItemClick"
                  ItemTemplate="{StaticResource PhotoTemplate}"
                  ItemsSource="{x:Bind WrapPanelCollection, Mode=OneWay}">
            <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate>
                    <controls:WrapPanel x:Name="sampleWrapPanel"
                                        Padding="12"
                                        HorizontalSpacing="{Binding HorizontalSpacing, ElementName=ThisSamplePage, Mode=OneWay}"
                                        VerticalSpacing="{Binding VerticalSpacing, ElementName=ThisSamplePage, Mode=OneWay}" />
                </ItemsPanelTemplate>
            </ItemsControl.ItemsPanel>
        </ListView>
    </Grid>
</Page>

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using CommunityToolkit.WinUI;

// TODO: Discuss with Uno folks about their own internal WrapPanel implementation.
using WrapPanel = CommunityToolkit.WinUI.Controls.WrapPanel;

namespace PrimitivesExperiment.Samples;

[ToolkitSampleNumericOption("HorizontalSpacing", initial: 5, min: 0, max: 200, step: 1, Title = "Horizontal Spacing")]
[ToolkitSampleNumericOption("VerticalSpacing", initial: 5, min: 0, max: 200, step: 1, Title = "VerticalSpacing")]

[ToolkitSample(id: nameof(WrapPanelSample), "WrapPanel", description: $"A sample for showing how to create and use a {nameof(WrapPanel)}.")]
public sealed partial class WrapPanelSample : Page
{
    private static readonly Random Rand = new Random();
    private ObservableCollection<PhotoDataItemWithDimension> WrapPanelCollection = new();

    public WrapPanelSample()
    {
        this.InitializeComponent();
    }

    private void ItemControl_ItemClick(object sender, ItemClickEventArgs e)
    {
        var item = e.ClickedItem as PhotoDataItemWithDimension;
        if (item == null)
        {
            return;
        }

        WrapPanelCollection.Remove(item);
    }

    private void AddButton_Click(object sender, RoutedEventArgs e)
    {
        WrapPanelCollection.Add(new PhotoDataItemWithDimension
        {
            Category = "Remove",
            Thumbnail = "ms-appx:///Assets/BigFourSummerHeat.jpg",
            Width = Rand.Next(60, 180),
            Height = Rand.Next(40, 140)
        });
    }

    private void AddFixedBtn_Click(object sender, RoutedEventArgs e)
    {
        WrapPanelCollection.Add(new PhotoDataItemWithDimension
        {
            Category = "Remove",
            Thumbnail = "ms-appx:///Assets/BigFourSummerHeat.jpg",
            Width = 150,
            Height = 100
        });
    }

    private void SwitchBtn_Click(object sender, RoutedEventArgs e)
    {
        if (WrapPanelContainer.FindDescendant<WrapPanel>() is WrapPanel sampleWrapPanel)
        {
            if (sampleWrapPanel.Orientation == Orientation.Horizontal)
            {
                sampleWrapPanel.Orientation = Orientation.Vertical;
                ScrollViewer.SetVerticalScrollMode(WrapPanelContainer, ScrollMode.Disabled);
                ScrollViewer.SetVerticalScrollBarVisibility(WrapPanelContainer, ScrollBarVisibility.Disabled);
                ScrollViewer.SetHorizontalScrollMode(WrapPanelContainer, ScrollMode.Auto);
                ScrollViewer.SetHorizontalScrollBarVisibility(WrapPanelContainer, ScrollBarVisibility.Auto);
            }
            else
            {
                sampleWrapPanel.Orientation = Orientation.Horizontal;
                ScrollViewer.SetVerticalScrollMode(WrapPanelContainer, ScrollMode.Auto);
                ScrollViewer.SetVerticalScrollBarVisibility(WrapPanelContainer, ScrollBarVisibility.Auto);
                ScrollViewer.SetHorizontalScrollMode(WrapPanelContainer, ScrollMode.Disabled);
                ScrollViewer.SetHorizontalScrollBarVisibility(WrapPanelContainer, ScrollBarVisibility.Disabled);
            }
        }
    }

    public class PhotoDataItemWithDimension : PhotoDataItem
    {
        public double Width { get; set; }
        public double Height { get; set; }
    }

    public class PhotoDataItem
    {
        public string? Title { get; set; }

        public string? Category { get; set; }

        public string? Thumbnail { get; set; }

        public override string ToString()
        {
            return Title!;
        }
    }
}

Примеры

Следующий пример добавления элемента управления WrapPanel.

<Page ....
      xmlns:controls="using:CommunityToolkit.WinUI.Controls">

    <Grid Background="{StaticResource Brush-Grey-05}">
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition />
        </Grid.RowDefinitions>
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="50" />
                <RowDefinition />
            </Grid.RowDefinitions>
            <Button Name="HorizontalButton" Click="HorizontalButton_Click" Content="Add Horizontal Control" />
            <controls:WrapPanel Name="HorizontalWrapPanel" Grid.Row="1" Margin="2" />
        </Grid>

        <Grid Grid.Row="1">
            <Grid.RowDefinitions>
                <RowDefinition Height="50" />
                <RowDefinition />
            </Grid.RowDefinitions>
            <Button Name="VerticalButton" Click="VerticalButton_Click" Content="Add Vertical Control" />
            <controls:WrapPanel Name="VerticalWrapPanel" Grid.Row="1" Margin="2"
                                 VerticalSpacing="10" HorizontalSpacing="10" Orientation="Vertical" />
        </Grid>
    </Grid>
</Page>