(3)FluidMoveBehavior 之模仿 Windows Phone 开始菜单的 Tile 长按后排序

 

   这个工程和上一篇 (2)中介绍的排序大同小异,只是比上一篇交换复杂一点,不是通过单击进行交换,

而是拖动一个 Tile 到另一个 Tile 上时,判断两个 Tile 的中心距离是否符合条件来判断是否进行交换两个 Tile。

归根结底还是利用 FluidMoveBehavior 行为来使 Silverlight 的元素在重新定位时,产生动画效果。毕竟在

实际开发中,用户体验还是很重要的,生动的交互比生硬的交互会更让用户感到亲切。

   当然项目中也用到了视觉状态管理相关的技术,因为不是重点,这里不会过多的介绍。

 

   效果交互图:

 第一步:首先定义一个 UserControl 类,作为一个 Tile 控件,并且在 CodeBehind 页面中注册一个

  依赖属性 TileBackgroundProperty,用来设置 Tile 不同的背景,效果:

 

 

    给该 Tile 控件添加 3 种不同的视觉状态:NormalVisualState、CheckedVisualState、FloatVisualState,即

当长按选中时,为 CheckedVisualState 状态,并显示右上角的图片 “图钉”;其它 tile 状态为 FloatVisualState,

为了让不同的 tile 漂浮的方向和方式不同,提供 4 个 FloatVisualState 。

相应的 xaml :

    <Grid x:Name="LayoutRoot" Margin="10" Width="150" Height="150">
        <VisualStateManager.VisualStateGroups>
            <VisualStateGroup x:Name="VisualStateGroup">
                <VisualState x:Name="NormalVisualState"/>
                <VisualState x:Name="CheckedVisualState">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="Assets_thumb_png">
                            <DiscreteObjectKeyFrame KeyTime="0">
                                <DiscreteObjectKeyFrame.Value>
                                    <Visibility>Visible</Visibility>
                                </DiscreteObjectKeyFrame.Value>
                            </DiscreteObjectKeyFrame>
                        </ObjectAnimationUsingKeyFrames></Storyboard>
                </VisualState>    
                <VisualState x:Name="FloatVisualState1">
                    <Storyboard RepeatBehavior="Forever" AutoReverse="True">
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleX)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="0.9"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleY)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="0.9"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="5"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateY)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="-5"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0.6"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0.6"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.6"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="0.6"/>
                        </DoubleAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>
                <VisualState x:Name="FloatVisualState2">
                    <Storyboard RepeatBehavior="Forever" AutoReverse="True">
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleX)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="0.9"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleY)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="0.9"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="5"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateY)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="5"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0.6"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0.6"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.6"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="0.6"/>
                        </DoubleAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>
                <VisualState x:Name="FloatVisualState3">
                    <Storyboard RepeatBehavior="Forever" AutoReverse="True">
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleX)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="0.9"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleY)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="0.9"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="-5"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateY)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="-5"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0.6"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0.6"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.6"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="0.6"/>
                        </DoubleAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>
                <VisualState x:Name="FloatVisualState4">
                    <Storyboard RepeatBehavior="Forever" AutoReverse="True">
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleX)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="0.9"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleY)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="0.9"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="0.9"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="-5"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateY)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="-5"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:6" Value="5"/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="grid">
                            <EasingDoubleKeyFrame KeyTime="0" Value="0.6"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0.6"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.6"/>
                            <EasingDoubleKeyFrame KeyTime="0:0:4.5" Value="0.6"/>
                        </DoubleAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>     
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>

        <Grid x:Name="grid" Background="{StaticResource PhoneAccentBrush}" RenderTransformOrigin="0.5,0.5">
            <Grid.RenderTransform>
                <CompositeTransform/>
            </Grid.RenderTransform>
            <Image Source="{Binding TileBackground}" Stretch="Fill"/>
            <Image x:Name="Assets_thumb_png" Visibility="Collapsed" Margin="124,-16,-15,124" Source="Assets/thumb.png" Stretch="Fill"/>
        </Grid>        
    </Grid>
View Code


该自定义控件相应的 C#:

    public partial class TileControl : UserControl
    {
        public TileControl()
        {
            InitializeComponent();
            this.DataContext = this;
        }

        #region TileBackground (依赖属性)        
        /// <summary>
        /// Tile 的背景图片
        /// </summary>
        public string TileBackground
        {
            get 
            {
                return (string)GetValue(TileBackgroundProperty); 
            }
            set 
            { 
                SetValue(TileBackgroundProperty, value); 
            }
        }
        public static readonly DependencyProperty TileBackgroundProperty =
            DependencyProperty.Register("TileBackground", typeof(string), typeof(TileControl),
              new PropertyMetadata("/Assets/Tiles/FlipCycleTileMedium.png"));

        #endregion                

        // 漂浮
        static Random rand = new Random();
        public void Float()
        {
            // 使 tile 进入不同的漂浮状态
            switch (rand.Next(5))
            {
                case 1:
                    VisualStateManager.GoToState(this, "FloatVisualState1", false);
                    break;
                case 2:
                    VisualStateManager.GoToState(this, "FloatVisualState2", false);
                    break;
                case 3:
                    VisualStateManager.GoToState(this, "FloatVisualState3", false);
                    break;
                case 4:
                    VisualStateManager.GoToState(this, "FloatVisualState4", false);
                    break;
                default: VisualStateManager.GoToState(this, "FloatVisualState3", false);
                    break;
            }
        }

        // 选中
        public void Checked()
        {
            VisualStateManager.GoToState(this, "CheckedVisualState", false);
        }

        // 恢复
        public void Reset()
        {
            VisualStateManager.GoToState(this, "NormalVisualState", false);
        }
    }
View Code

 

第二步:定义不同的 Tile 在重叠时,判断中心点的距离,是否小于 40px,如果是,则交换两个 Tile。

     如果 Tile 控件的 宽和 高设置为 150px,则各个控件的坐标为:

 

 

当拖动一个 Tile 到其它 Tile 上时,判断两个 Tile 的中心点坐标的距离:

 

 

第三步:在 MainPage 页面中,添加一个 Grid,分别放置各个自定义控件,并且每个自定义控件放在一个 Boder 里面,

    并且分别注册 Border 的长按事件 Hold 统一为 Border_Hold:

       <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <Grid.Resources>
                <Style TargetType="Border">
                    <Setter Property="Background" Value="Transparent"/>
                </Style>
            </Grid.Resources>
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="Auto"/>
            </Grid.ColumnDefinitions>
            <i:Interaction.Behaviors>
                <el:FluidMoveBehavior x:Name="fluidBehavior" AppliesTo="Children" Duration="00:00:01">
                    <el:FluidMoveBehavior.EaseY>
                        <QuinticEase EasingMode="EaseOut"/>
                    </el:FluidMoveBehavior.EaseY>
                    <el:FluidMoveBehavior.EaseX>
                        <QuinticEase EasingMode="EaseOut"/>
                    </el:FluidMoveBehavior.EaseX>
                </el:FluidMoveBehavior>
            </i:Interaction.Behaviors>
            <Border Hold="Border_Hold">
                <local:TileControl TileBackground="/Assets/Tiles/01.png"/>
            </Border>
            <Border Grid.Column="1" Hold="Border_Hold">
                <local:TileControl TileBackground="/Assets/Tiles/02.png"/>
            </Border>
            <Border  Grid.Row="1"  Hold="Border_Hold">
                <local:TileControl TileBackground="/Assets/Tiles/03.png"/>
            </Border>
            <Border Grid.Row="1" Grid.Column="1"  Hold="Border_Hold">
                <local:TileControl TileBackground="/Assets/Tiles/04.png"/>
            </Border>
            <Border Grid.Row="2"  Hold="Border_Hold">
                <local:TileControl TileBackground="/Assets/Tiles/05.png"/>
            </Border>
            <Border  Grid.Row="2" Grid.Column="1" Hold="Border_Hold">
                <local:TileControl TileBackground="/Assets/Tiles/06.png"/>
            </Border>
        </Grid>

 

第四步:在 MainPage 页面的 CodeBehind 中,定义一个类型为  Dictionary<Point, Border> 的泛型字典 dic,

     当页面加载完成时,初始化该字典:

       public MainPage()
        {
            InitializeComponent();
            this.Loaded += MainPage_Loaded;
        }

        void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            InitDic();
        }

        // Size : 资源素距离父元素左上角的距离
        Dictionary<Point, Border> dic = new Dictionary<Point, Border>();
        int childWidth;

        // 初始化一个字典集合,Key:border 元素的中心点坐标,value:border 自己
        void InitDic()
        {
            dic.Clear();

            foreach (var item in ContentPanel.Children)
            {
                childWidth = (int)item.DesiredSize.Width;

                Border border = item as Border;
                int row = Grid.GetRow(border);
                int col = Grid.GetColumn(border);
                Point position = new Point(col * childWidth + childWidth / 2, row * childWidth + childWidth / 2);
                border.Tag = position;

                dic.Add(position, border);

                Debug.WriteLine("point-  x:" + (col * childWidth + childWidth / 2) + "  y:" + (row * childWidth + childWidth / 2));
            }
        }

 

在 Border 的 Border_Hold 方法中,添加逻辑,用来处理各个 Tile 的视图状态,并且注册 ManipulationDelta 和 MouseLeftButtonUp 事件:

       Border borderTemp;
        CompositeTransform transformTemp;
        private void Border_Hold(object sender, System.Windows.Input.GestureEventArgs e)
        {
            e.Handled = true;

            borderTemp = sender as Border;

            // 注册 tile 右上角“图钉”图片的单击事件
            (borderTemp.Child as TileControl).Assets_thumb_png.Tap += Assets_thumb_png_Tap;

            transformTemp = new CompositeTransform();

            transformTemp.TranslateX = x;
            transformTemp.TranslateY = y;

            borderTemp.RenderTransform = transformTemp;

            // 拖动 border 时,改变它的坐标
            borderTemp.ManipulationDelta += borderTemp_ManipulationDelta;

            // 当手指离开 border 时,判断各个 tile 中心点的距离
            borderTemp.MouseLeftButtonUp += borderTemp_MouseLeftButtonUp;

            if (borderTemp.Child != null)
            {
                foreach (var item in ContentPanel.Children)
                {
                    Border border = item as Border;
                    if (border.Child != null)
                    {
                        TileControl tile = border.Child as TileControl;
                        // 被选中的 tile 进入 CheckedVisualState 视图状态,其余的进入 FloatVisualState 视图状态
                        if (tile == (borderTemp.Child as TileControl))
                        {
                            tile.Checked();                            
                            border.IsHitTestVisible = true;
                        }
                        else
                        {
                            tile.Float();
                            // 当处于漂浮状态时,不再接收“单击”等屏幕事件
                            border.IsHitTestVisible = false;
                        }
                    }
                }
            }
        }

 

 

当手指离开选择的 Tile 时,判断各个 Tile 的中心点的距离,从而判断是否具备交换两个 Tile 的条件:

        void borderTemp_MouseLeftButtonUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            e.Handled = true;

            DateTime timeStart = DateTime.Now;

            Debug.WriteLine("Translation.X: " + transformTemp.TranslateX);
            Debug.WriteLine("Translation.Y: " + transformTemp.TranslateY);

            Point pointSource = (Point)borderTemp.Tag;

            Point point = new Point(transformTemp.TranslateX + pointSource.X, transformTemp.TranslateY + pointSource.Y);

            bool IsSwaped = false;

            // 当手指离开屏幕时,判断选中的 tile 的中心点和其它中心点的直线距离,
            // 如果距离小于 40px,则两个 tile 互换 //换
            foreach (Point position in dic.Keys)
            {
                Border border2 = dic[position];
                if (borderTemp != border2)
                {
                    x = (int)(point.X - position.X);
                    y = (int)(point.Y - position.Y);

                   // 计算两个 Tile 中心点的直线距离                  
int distance = (int)Math.Sqrt(x * x + y * y); if (distance < 40) { // 交换两个 tile 的位置 SwapBorder(borderTemp, border2); IsSwaped = true; break; } } } Debug.WriteLine(DateTime.Now - timeStart); if (!IsSwaped) { transformTemp.TranslateX = 0; transformTemp.TranslateY = 0; } }

 

 

   重要代码粘贴到上面了,具体代码可以下载工程。至此有关 FluidMoveBehavior 行为的三篇文章暂时写完了。

   这个demo 运行的交互很简单,但是算法上还是颇费周折,想了几种实现方式,最终采用了上面的方式,重点时间

都花费在了数学计算上了。不过 demo 的代码还是比较粗糙,性能也没有优化,只是实现了大概的交互。

 

工程源码下载

posted @ 2013-09-05 16:46  博琼  阅读(953)  评论(7编辑  收藏  举报