WrapPanel

Efterföljande ordning sker sekventiellt uppifrån och ned eller från höger till vänster, beroende på värdet för egenskapen Orientering.

WrapPanel placerar underordnade kontroller baserat på orientering, vågrät orientering (standard) positionerar kontroller från vänster till höger och lodräta orienteringspositioner från topp till botten, och när den maximala bredden eller höjden har nåtts skapar kontrollen automatiskt rad eller kolumn baserat på orienteringen.

Avstånd kan läggas till automatiskt mellan objekt med egenskaperna HorizontalSpacing och VerticalSpacing. När orienteringen är vågrät lägger HorizontalSpacing till enhetligt vågrätt avstånd mellan varje enskilt objekt, och VerticalSpacing lägger till enhetligt avstånd mellan varje rad med objekt.

När orienteringen är lodrät lägger HorizontalSpacing till ett enhetligt avstånd mellan varje kolumn med objekt, och VerticalSpacing lägger till enhetligt lodrätt avstånd mellan enskilda objekt.

<!--  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!;
        }
    }
}

Examples

Följande exempel på hur du lägger till WrapPanel Control.

<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>