GeekDesk/Control/Other/GradientBGDialog.xaml

<Border x:Class="GeekDesk.Control.Other.GradientBGDialog"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:hc="https://handyorg.github.io/handycontrol"
        CornerRadius="4"
        >
    <Grid>
        <StackPanel>
            <Grid Width="750"
                  Height="550"
                  Panel.ZIndex="0"
                  MouseDown="DragMove"
                  >
                <Grid.Background>
                    <SolidColorBrush Color="Black" Opacity="0.01"/>
                </Grid.Background>
            </Grid>
            <hc:TransitioningContentControl TransitionMode="Fade"
                                            Panel.ZIndex="99"
                                            Width="600"
                                            Height="400"
                                            Margin="0,-620,0,0">

                <Border Style="{StaticResource BorderBG}">
                    <Grid>
                        <TextBlock Text="提示: 右键点击可以删除自定义的背景颜色哦" Foreground="Gray" HorizontalAlignment="Center" Margin="0,5,0,0"/>

                        <ListBox x:Name="GradientBGs"
                                 ItemsSource="{Binding}"
                                 Background="Transparent"
                                 Margin="20,20,20,50"
                                 BorderThickness="0"
                                 >
                            <ListBox.Resources>
                                <ContextMenu x:Key="CMDialog" Width="200">
                                    <MenuItem Header="删除" Click="Delete" Tag="{Binding}"/>
                                </ContextMenu>
                            </ListBox.Resources>
                            <ListBox.ItemContainerStyle>
                                <Style TargetType="ListBoxItem">
                                    <Setter Property="ContextMenu" Value="{StaticResource CMDialog}"/>
                                    <Setter Property="Margin" Value="10"/>
                                    <Setter Property="Effect" Value="{StaticResource EffectShadow2}"/>
                                </Style>
                            </ListBox.ItemContainerStyle>
                            <ListBox.ItemsPanel>
                                <ItemsPanelTemplate>
                                    <WrapPanel Background="Transparent"/>
                                </ItemsPanelTemplate>
                            </ListBox.ItemsPanel>
                            
                            <ListBox.ItemTemplate>
                                <DataTemplate>
                                    <Border CornerRadius="4" Width="100" Height="100"
                                MouseLeftButtonDown="BGBorder_MouseLeftButtonDown"
                                Tag="{Binding}">
                                        <Border.Background>
                                            <LinearGradientBrush>
                                                <GradientStop Offset="0" Color="{Binding Color1}"/>
                                                <GradientStop Offset="1" Color="{Binding Color2}"/>
                                            </LinearGradientBrush>
                                        </Border.Background>
                                        <Border Width="100" Height="30" VerticalAlignment="Bottom">
                                            <Border.Background>
                                                <SolidColorBrush Color="Gray" Opacity="0.4"/>
                                            </Border.Background>
                                            <TextBlock Text="{Binding Name}"  TextAlignment="Center" VerticalAlignment="Center" FontSize="17" FontWeight="Bold" Foreground="White"/>
                                        </Border>
                                    </Border>
                                </DataTemplate>
                            </ListBox.ItemTemplate>
                        </ListBox>

                        <hc:UniformSpacingPanel Spacing="10"  Grid.ColumnSpan="4">
                            <Button Content="关闭" Style="{StaticResource MyBtnStyle}" Click="Close_Click" HorizontalAlignment="Stretch" Margin="524,360,-524,10" VerticalAlignment="Stretch"/>
                        </hc:UniformSpacingPanel>
                    </Grid>
                </Border>

            </hc:TransitioningContentControl>
        </StackPanel>
    </Grid>
</Border>