游戏人生Silverlight(2) - 趣味钢琴[Silverlight 2.0(c#)]

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游戏人生Silverlight(2) - 趣味钢琴[Silverlight 2.0(c#)]

作者：webabcd


介绍
使用 Silverlight 2.0(c#) 开发一个趣味钢琴


玩法
打开音箱，从左侧列表选择要挑战的乐谱，右侧会出现对应的乐谱提示动画，等按键提示移动到目标区后敲击键盘上对应的按键


在线DEMO



思路
1、添加多个MediaElement控件，循环使用，以达到同时播放多个音阶的效果
2、提示按键模块分3组动画，分别为提示部分、目标部分和离开部分，进入目标区和离开目标区都要触发对应的事件，以使外部判断用户是否按照提示正确地敲击了按键


关键代码
1、钢琴音阶播放器
ScalePlayer.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace YYPiano.Controls.Parts
{
    public partial class ScalePlayer : UserControl
    {
        // MediaElement 控件总数
        private int _count = 32;

        // MediaElement 控件集合的索引
        private int _index = 0;

        public ScalePlayer()
        {
            InitializeComponent();

            this.Loaded += new RoutedEventHandler(Player_Loaded);
        }

        void Player_Loaded(object sender, RoutedEventArgs e)
        {
            // 在 Canvas 上添加指定数量的 MediaElement 控件
            for (int i = 0; i < _count; i++)
            {
                var element = new MediaElement();
                element.Volume = 1d;

                root.Children.Add(element);
            }
        }

        /**//// <summary>
        /// 播放音阶
        /// A 键对应 Scale 文件夹内的 A.mp3，以此类推
        /// A 键对应 C 大调的低音 dou，以此类推
        /// </summary>
        /// <param name="key">键值</param>
        public void Play(Key key)
        {
            if (key >= Key.A && key <= Key.Z)
            {
                // 循环使用 MediaElement 控件集合中的控件
                if (_index > _count - 1)
                    _index = 0;

                // 设置 MediaElement 的 Source 并播放
                var element = root.Children[_index] as MediaElement;
                element.Source = new Uri("/YYPiano;component/Scale/" + key.ToString() + ".mp3", UriKind.Relative);
                element.Stop();
                element.Play();

                _index++;
            }
        }
    }
}

2、按键提示动画
AnimationKey.xaml

<UserControl x:Class="YYPiano.Controls.Parts.AnimationKey"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Canvas>
        <!--3个椭圆，目标区，按键动画进入该区域后敲击则为有效敲击-->
        <Ellipse x:Name="target" Width="80" Height="80" Stroke="#F80" Fill="Transparent" StrokeThickness="1" Canvas.Left="0" Canvas.Top="250" />
        <Ellipse x:Name="target2" Width="80" Height="80" Stroke="#F80" Fill="Transparent" StrokeThickness="1" Canvas.Left="120" Canvas.Top="250" />
        <Ellipse x:Name="target3" Width="80" Height="80" Stroke="#F80" Fill="Transparent" StrokeThickness="1" Canvas.Left="240" Canvas.Top="250" />

        <!--提示按键-->
        <Border x:Name="container" BorderBrush="Gray" BorderThickness="1" Width="50" Height="50" CornerRadius="50" Canvas.Left="135" RenderTransformOrigin="0.5, 0.5">
            <TextBlock x:Name="key" TextAlignment="Center" VerticalAlignment="Center" FontSize="40" FontWeight="Bold">
            </TextBlock>
            <Border.RenderTransform>
                <TransformGroup>
                    <RotateTransform x:Name="rt" />
                    <TranslateTransform x:Name="tt" />
                    <ScaleTransform x:Name="st" ScaleX="0.3" ScaleY="0.3" />
                </TransformGroup>
            </Border.RenderTransform>
        </Border>

        <Canvas.Resources>
            <!--主动画（缓冲提示）-->
            <Storyboard x:Name="mainAni" Completed="mainAni_Completed">
                <!--坐标-->
                <DoubleAnimation x:Name="targetX" From="0" To="0" Duration="0:0:4" Storyboard.TargetName="tt" Storyboard.TargetProperty="X" />
                <DoubleAnimation From="0" To="250" Duration="0:0:4" Storyboard.TargetName="tt" Storyboard.TargetProperty="Y" />

                <!--旋转-->
                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="rt" Storyboard.TargetProperty="Angle" RepeatBehavior="1x" >
                    <SplineDoubleKeyFrame Value="366" KeySpline="0.1,0 0.2,0.95" KeyTime="0:0:4" />
                </DoubleAnimationUsingKeyFrames>

                <!--缩放-->
                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="st" Storyboard.TargetProperty="ScaleX">
                    <SplineDoubleKeyFrame Value="1" KeySpline="0.1,0 0.3,0.8" KeyTime="0:0:4" />
                </DoubleAnimationUsingKeyFrames>
                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="st" Storyboard.TargetProperty="ScaleY">
                    <SplineDoubleKeyFrame Value="1" KeySpline="0.1,0 0.3,0.8" KeyTime="0:0:4" />
                </DoubleAnimationUsingKeyFrames>
            </Storyboard>

            <!--进入目标区后的动画-->
            <Storyboard x:Name="insideAni" Completed="insideAni_Completed" Duration="0:0:0.4">
                <DoubleAnimation To="310" Storyboard.TargetName="tt" Storyboard.TargetProperty="Y" />
            </Storyboard>

            <!--离开目标区后的动画-->
            <Storyboard x:Name="outsideAni">
                <DoubleAnimation To="400" Storyboard.TargetName="tt" Storyboard.TargetProperty="Y" />
                <DoubleAnimation To="0" Storyboard.TargetName="container" Storyboard.TargetProperty="Opacity" />
            </Storyboard>
        </Canvas.Resources>
    </Canvas>
</UserControl>

AnimationKey.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace YYPiano.Controls.Parts
{
    public partial class AnimationKey : UserControl
    {
        public AnimationKey()
        {
            InitializeComponent();
        }

        /**//// <summary>
        /// 键值 A - Z，动画显示，用于提示用户应该敲什么键
        /// </summary>
        public Key Key
        {
            get { return Convert.ToChar(key.Text).ToKey(); }
            set { key.Text = value.ToChar().ToString(); }
        }

        /**//// <summary>
        /// 开始动画
        /// </summary>
        public void Start()
        {
            mainAni.Begin();
        }

        /**//// <summary>
        /// 停止动画
        /// </summary>
        public void Stop()
        {
            mainAni.Stop();
            insideAni.Stop();
            outsideAni.Stop();
        }

        /**//// <summary>
        /// 动画开始时间
        /// </summary>
        public TimeSpan BeginTime
        {
            set { mainAni.BeginTime = value; }
        }

        private int _targetIndex;
        /**//// <summary>
        /// UI 上设置了 3 个目标区，设置键的动画最终要落到哪个区上
        /// </summary>
        public int TargetIndex
        {
            set
            {
                if (value == 0)
                    targetX.To = -120;
                else if (value == 1)
                    targetX.To = 0;
                else if (value == 2)
                    targetX.To = 120;
                else
                    targetX.To = 0;

                _targetIndex = value;
            }
        }

        /**//// <summary>
        /// 主动画完成后
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void mainAni_Completed(object sender, EventArgs e)
        {
            if (_targetIndex == 0)
                target.Fill = new SolidColorBrush(Colors.Orange);
            else if (_targetIndex == 1)
                target2.Fill = new SolidColorBrush(Colors.Orange);
            else if (_targetIndex == 2)
                target3.Fill = new SolidColorBrush(Colors.Orange);

            insideAni.Begin();

            OnInside();
        }

        /**//// <summary>
        /// 目标区动画完成后
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void insideAni_Completed(object sender, EventArgs e)
        {
            if (_targetIndex == 0)
                target.Fill = new SolidColorBrush(Colors.Transparent);
            else if (_targetIndex == 1)
                target2.Fill = new SolidColorBrush(Colors.Transparent);
            else if (_targetIndex == 2)
                target3.Fill = new SolidColorBrush(Colors.Transparent);

            outsideAni.Begin();

            OnOutside();
        }

        /**//// <summary>
        /// 动画进入目标区后的事件
        /// </summary>
        public event EventHandler<PianoKeyEventArgs> Inside;
        public void OnInside()
        {
            if (Inside != null)
            {
                Inside(this, new PianoKeyEventArgs() { Key = this.Key });
            }
        }

        /**//// <summary>
        /// 动画离开目标区后的事件
        /// </summary>
        public event EventHandler<PianoKeyEventArgs> Outside;
        public void OnOutside()
        {
            if (Outside != null)
            {
                Outside(this, new PianoKeyEventArgs() { Key = this.Key });
            }
        }
    }
}

3、乐谱提示动画
AnimationMusicBook.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

using YYPiano.Controls.Parts;
using System.Threading;

namespace YYPiano.Controls
{
    /**//// <summary>
    /// 乐谱动画
    /// </summary>
    public partial class AnimationMusicBook : UserControl
    {
        /**//// <summary>
        /// 当前进入到目标区域的按键集合（先进先出）
        /// </summary>
        private List<KeyHitModel> _currentKeys = new List<KeyHitModel>();

        public AnimationMusicBook()
        {
            InitializeComponent();
        }

        /**//// <summary>
        /// 启动乐谱动画
        /// </summary>
        /// <param name="code">乐谱编码</param>
        /// <returns>是否成功地启动了乐谱动画</returns>
        public bool Start(string code)
        {
            code = code.ToUpper().Trim();

            // 清除已有的 AnimationKey 控件
            foreach (var c in root.Children)
            {
                var ak = c as AnimationKey;
                ak.Stop();
            }
            root.Children.Clear();
            _currentKeys.Clear();

            // 把乐谱编码解析为乐谱实体类（用于描述乐谱的每一音阶）集合
            var musicBook = new List<MusicBookModel>();
            var countDelay = 0;
            try
            {
                foreach (var s in code.Split(','))
                {
                    var delay = int.Parse(s.Trim().Substring(1));
                    var key = Convert.ToChar(s.Trim().Substring(0, 1)).ToKey();

                    musicBook.Add(new MusicBookModel() { Length = countDelay, Key = key });

                    countDelay += delay;
                }
            }
            catch (Exception)
            {
                return false;
            }

            // 在容器内放置相应的 AnimationKey 控件
            for (int i = 0; i < musicBook.Count; i++)
            {
                AnimationKey key = new AnimationKey();
                key.TargetIndex = i % 3;
                key.Key = musicBook[i].Key;
                key.BeginTime = TimeSpan.FromMilliseconds(musicBook[i].Length);
                key.Inside += new EventHandler<PianoKeyEventArgs>(key_Inside);
                key.Outside += new EventHandler<PianoKeyEventArgs>(key_Outside);
                key.Start();

                root.Children.Add(key);
            }

            return true;
        }

        /**//// <summary>
        /// 按键进入目标区
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void key_Inside(object sender, PianoKeyEventArgs e)
        {
            _currentKeys.Add(new KeyHitModel { Key = e.Key, Hit = false });
        }

        /**//// <summary>
        /// 按键离开目标区
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void key_Outside(object sender, PianoKeyEventArgs e)
        {
            // 获取此次离开目标区的按键（进入到目标区域的按键集合的第一个成员）
            var key = _currentKeys.First();

            if (!key.Hit)
                OnLost();

            _currentKeys.RemoveAt(0);
        }

        /**//// <summary>
        /// 指定的键值被敲击后所执行的方法
        /// </summary>
        /// <param name="key">键值</param>
        public void Play(Key key)
        {
            if (key >= Key.A && key <= Key.Z && _currentKeys.Where(p => !p.Hit).Count() > 0)
            {
                var validKey = _currentKeys.Where(p => !p.Hit && p.Key == key).FirstOrDefault();
                if (validKey != null)
                {
                    OnScore();
                    validKey.Hit = true;
                }
                else
                {
                    OnLost();
                }
            }
        }

        /**//// <summary>
        /// 按键敲击正确的事件
        /// </summary>
        public event EventHandler<EventArgs> Score;
        public void OnScore()
        {
            if (Score != null)
            {
                Score(this, new EventArgs());
            }
        }

        /**//// <summary>
        /// 按键敲击错误或未及时敲击的事件
        /// </summary>
        public event EventHandler<EventArgs> Lost;
        public void OnLost()
        {
            if (Lost != null)
            {
                Lost(this, new EventArgs());
            }
        }
    }
}

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