WPF实现音乐字幕动画

 public class TextBlockCustomControl : TextBlock     {          public static readonly DependencyProperty DurationProperty =              DependencyProperty.Register("Duration", typeof(TimeSpan),              typeof(TextBlockCustomControl), new PropertyMetadata(TimeSpan.FromSeconds(1)));          public TimeSpan Duration         {             get { return (TimeSpan)GetValue(DurationProperty); }             set { SetValue(DurationProperty, value); }         }          public TimeSpan StartDuration         {             get { return (TimeSpan)GetValue(StartDurationProperty); }             set { SetValue(StartDurationProperty, value); }         }          public static readonly DependencyProperty StartDurationProperty =             DependencyProperty.Register("StartDuration", typeof(TimeSpan), typeof(TextBlockCustomControl), new PropertyMetadata(TimeSpan.FromSeconds(1)));           public TextBlockCustomControl()         {             NameScope.SetNameScope(this, new NameScope());             var gradientBrush = new LinearGradientBrush();             gradientBrush.EndPoint = new Point(1, 0.5);             gradientBrush.StartPoint = new Point(0, 0.5);             var stop1 = new GradientStop(Colors.White, 0);             var stop2 = new GradientStop(Colors.White, 1);             var stop3 = new GradientStop(Colors.Gray, 1);             this.RegisterName("GradientStop1", stop1);             this.RegisterName("GradientStop2", stop2);             this.RegisterName("GradientStop3", stop3);             gradientBrush.GradientStops.Add(stop1);             gradientBrush.GradientStops.Add(stop2);             gradientBrush.GradientStops.Add(stop3);             this.Foreground = gradientBrush;             this.Loaded += (s, e) =>             {                 Animate();             };         }          public override void OnApplyTemplate()         {             base.OnApplyTemplate();                      }          private void Animate()         {             var storyboard = new Storyboard();             var animation1 = new DoubleAnimation();             animation1.From = 0;             animation1.To = 1;             animation1.Duration = Duration;             animation1.BeginTime = StartDuration;             Storyboard.SetTargetName(animation1, "GradientStop2");             Storyboard.SetTargetProperty(animation1,                 new PropertyPath(GradientStop.OffsetProperty));              var animation2 = new DoubleAnimation();             animation2.From = 0;             animation2.To = 1;             animation2.Duration = Duration;             animation2.BeginTime = StartDuration;             Storyboard.SetTargetName(animation2, "GradientStop3");             Storyboard.SetTargetProperty(animation2,                 new PropertyPath(GradientStop.OffsetProperty));              storyboard.Children.Add(animation1);             storyboard.Children.Add(animation2);             storyboard.Begin(this);                     }     }

<Window x:Class="WPFSongWords.MainWindow"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"         xmlns:shell="http://schemas.microsoft.com/winfx/2006/xaml/presentation/shell"         xmlns:local="clr-namespace:WPFSongWords"         mc:Ignorable="d"         Title="WPFDevelopers" Height="650" Width="400"         ResizeMode="NoResize" WindowStartupLocation="CenterScreen"         TextOptions.TextFormattingMode="Display" UseLayoutRounding="True"         SnapsToDevicePixels="True" WindowStyle="None" Background="Transparent"         Foreground="White" FontSize="14">     <Window.Resources>         <LinearGradientBrush x:Key="DefaultBackgroundBrush" StartPoint="0,0" EndPoint="0,1">             <GradientStop Color="#FF33B9AD" Offset="0" />             <GradientStop Color="#FF007ACC" Offset="1" />         </LinearGradientBrush>     </Window.Resources>     <shell:WindowChrome.WindowChrome>         <shell:WindowChrome GlassFrameThickness="-1" CaptionHeight="40"/>     </shell:WindowChrome.WindowChrome>     <Grid>         <Border Background="{StaticResource DefaultBackgroundBrush}"              UseLayoutRounding="True"              SnapsToDevicePixels="True"             Margin="10">             <Border.Effect>                 <DropShadowEffect ShadowDepth="1" BlurRadius="6" Direction="270" Opacity="0.75" Color="#FF211613"/>             </Border.Effect>         </Border>         <Grid Margin="10">             <Grid.RowDefinitions>                 <RowDefinition Height="Auto"/>                 <RowDefinition/>                 <RowDefinition Height="Auto"/>                 <RowDefinition Height="60"/>             </Grid.RowDefinitions>             <Grid Height="40" Grid.Row="0">                 <Grid.ColumnDefinitions>                     <ColumnDefinition/>                     <ColumnDefinition Width="Auto"/>                 </Grid.ColumnDefinitions>                 <TextBlock Text="WPF开发者" VerticalAlignment="Center"                             Padding="10,0" FontSize="16"/>                 <Button Grid.Column="1" Style="{StaticResource CloseButton}" Width="30"                         Click="BtnCloseClick">                     <Button.Content>                         <Path Data="{StaticResource ClosePath}" Fill="{Binding RelativeSource={RelativeSource AncestorType=Button}, Path=Foreground}"                                 Height="12" Width="12" Stretch="Uniform" StrokeThickness="0"/>                     </Button.Content>                 </Button>             </Grid>             <StackPanel HorizontalAlignment="Center" Grid.Row="1">                 <TextBlock Text="中华人民共和国国歌" HorizontalAlignment="Center" FontSize="20" Margin="0,10"/>                 <ItemsControl ItemsSource="{Binding MusicWordArray,RelativeSource={RelativeSource AncestorType=local:MainWindow}}">                     <ItemsControl.ItemTemplate>                         <DataTemplate>                             <local:TextBlockCustomControl Text="{Binding SongWords}"                                                       StartDuration="{Binding StarTime}"                                                       Duration="{Binding RunTime}"                                                       Block.TextAlignment="Center"                                                       FontSize="15" Margin="0,4"/>                         </DataTemplate>                     </ItemsControl.ItemTemplate>                 </ItemsControl>             </StackPanel>         </Grid>     </Grid> </Window>

using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes;  namespace WPFSongWords {     /// <summary>     /// MainWindow.xaml 的交互逻辑     /// </summary>     public partial class MainWindow : Window     {         public IEnumerable MusicWordArray         {             get { return (IEnumerable)GetValue(MusicWordArrayProperty); }             set { SetValue(MusicWordArrayProperty, value); }         }          public static readonly DependencyProperty MusicWordArrayProperty =             DependencyProperty.Register("MusicWordArray", typeof(IEnumerable), typeof(MainWindow), new PropertyMetadata(null));         public MainWindow()         {             InitializeComponent();             this.Loaded += MainWindow_Loaded;         }         private void MainWindow_Loaded(object sender, RoutedEventArgs e)         {             var musicWords = new List<MusicWord>();             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(1), StarTime = TimeSpan.FromSeconds(0), SongWords = "作词 : 田汉" });             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(1), StarTime = TimeSpan.FromSeconds(1), SongWords = "作曲 : 聂耳" });             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(0.5), StarTime = TimeSpan.FromSeconds(2), SongWords = "起来！" });             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(2), StarTime = TimeSpan.FromSeconds(2.5), SongWords = "不愿做奴隶的人们！！" });             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(4), StarTime = TimeSpan.FromSeconds(4.5), SongWords = "把我们的血肉，筑成我们新的长城！"});             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(3), StarTime = TimeSpan.FromSeconds(8.5), SongWords = "中华民族到了最危险的时候，" });             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(3.5), StarTime = TimeSpan.FromSeconds(11.5), SongWords = "每个人被迫着发出最后的吼声。" });             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(0.5), StarTime = TimeSpan.FromSeconds(15), SongWords = "起来！" });             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(0.5), StarTime = TimeSpan.FromSeconds(15.5), SongWords = "起来！" });             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(0.5), StarTime = TimeSpan.FromSeconds(16), SongWords = "起来！" });             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(4.5), StarTime = TimeSpan.FromSeconds(16.5), SongWords = "我们万众一心，冒着敌人的炮火前进！" });             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(2), StarTime = TimeSpan.FromSeconds(21), SongWords = "冒着敌人的炮火前进！" });             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(0.5), StarTime = TimeSpan.FromSeconds(23), SongWords = "前进！" });             musicWords.Add(new MusicWord { RunTime = TimeSpan.FromSeconds(0.5), StarTime = TimeSpan.FromSeconds(23.5), SongWords = "前进！进！" });             MusicWordArray = musicWords;         }         private void BtnCloseClick(object sender, RoutedEventArgs e)         {             Close();         }     }     public class MusicWord     {         public TimeSpan RunTime { get; set; }         public TimeSpan StarTime { get; set; }         public string SongWords { get; set; }      } }