UWP 轨道视图Orbit View

<controls:OrbitView x:Name="orbitView"
                              AnchorColor="Gray"
                              AnchorsEnabled="False"
                              Background="Transparent"
                              IsItemClickEnabled="True"
                              MinItemSize="50"
                              MaxItemSize="100"
                              OrbitColor="LightGray"
                              OrbitsEnabled="True"
                              ItemClick="orbitView_ItemClick">
                <controls:OrbitView.ItemTemplate>
                    <DataTemplate>
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="*"/>
                                <!-- Have this space to keep image centered on line -->
                                <!--<RowDefinition Height="2*"/>
                            <RowDefinition Height="*"/>-->
                            </Grid.RowDefinitions>
                            <controls:DropShadowPanel x:Name="DropShadowPanel"
                                            HorizontalContentAlignment="Stretch"
                                            HorizontalAlignment="Center"
                                            VerticalContentAlignment="Stretch"
                                            BlurRadius="20"
                                            Color="Black" 
                                            Grid.Row="1">
                                <Ellipse Stretch="Uniform" VerticalAlignment="Stretch" HorizontalAlignment="Center"
                             Width="{Binding ActualHeight, ElementName=DropShadowPanel}">
                                    <Ellipse.Fill>
                                        <ImageBrush ImageSource="{Binding Image}" />
                                    </Ellipse.Fill>
                                </Ellipse>
                            </controls:DropShadowPanel>
                        </Grid>
                    </DataTemplate>
                </controls:OrbitView.ItemTemplate>

                <controls:OrbitView.CenterContent>
                    <Grid>
                        <controls:DropShadowPanel BlurRadius="20">
                            <Ellipse Width="105"
                           Height="105"
                           Fill="{ThemeResource SystemControlForegroundAccentBrush}"
                           Stroke="Black"
                           StrokeThickness="0" />
                        </controls:DropShadowPanel>
                        <Ellipse Width="100"
                         Height="100"
                         HorizontalAlignment="Center"
                         VerticalAlignment="Center">
                            <Ellipse.Fill>
                                <ImageBrush ImageSource="ms-appx:///Assets/Square44x44Logo.scale-400.png"/>
                            </Ellipse.Fill>
                        </Ellipse>
                    </Grid>
                </controls:OrbitView.CenterContent>
            </controls:OrbitView>

try
            {
                double[] arr1 = { 0.1, 0.4, 0.3, 0.15, 0.45, 0.2, 0.5 };
                double[] arr2 = { 0.1, 0.4, 0.3, 0.45, 0.8, 0.15, 0.7, 0.2, 0.9, 0.5, 0.6, 0.1, 0.6, 0.4, 0.5, 0.8, 0.3, 0.9, 0.1, 0.5 };
                for (int i = 0; i <= (Application.Current as App).MusicItems.Count - 1; i++)
                {
                    ID3Tag item = (Application.Current as App).MusicItems[i];
                    BitmapImage bi = new BitmapImage();
                    bi = (BitmapImage)item.Cover;
                    OrbitViewDataItem ooo = new OrbitViewDataItem
                    {
                        Diameter = arr1[i % 7],
                        Distance = arr2[i % 20],
                        Image = item.Cover,
                        Label = item.Title,
                    };

                    ovcOrbit.Add(ooo);
                }
                orbitView.ItemsSource = ovcOrbit;
            }
            catch { }