WPF编游戏系列 之七 动画效果（2）

       上一篇已经对关闭窗口图标进行了动画效果处理，本篇将对窗口界面的显示和关闭效果进行处理。由于所有的动画效果都是针对窗口界面的Canvas，所以先要为它添加一些RenderTranform属性，这些属性不要填写任何效果，后面会由Storyboard和EventTrigger为其提供。

<Canvas Name="queryCanvas" Visibility="Collapsed" RenderTransformOrigin="0.5,0.5">     <!-- TransformGroup都定义在这里 -->
   <Canvas.RenderTransform>        <TransformGroup>            <ScaleTransform></ScaleTransform>            <RotateTransform></RotateTransform>        </TransformGroup>     </Canvas.RenderTransform>
   <!-- 下面是窗口界面代码 -->     <Border Name="queryBorder" BorderThickness="9" CornerRadius="9" 
           Width="920" Height="440" Canvas.Left="40" Canvas.Top="160">        <ScrollViewer Name="queryScrollViewer" 
                    ScrollViewer.VerticalScrollBarVisibility="Visible">            <StackPanel Orientation="Vertical">
              <!-- 我就是那个关闭窗口图标，你不认识我啦！ -->                <Image Source="image/close.png" Name="closeImage" Height="20" Width="20"                       Cursor="Hand" Margin="5" HorizontalAlignment="Right">                    <Image.ToolTip>Close</Image.ToolTip>                </Image>                <Grid Name="queryGrid"></Grid>             </StackPanel>         </ScrollViewer>     </Border>  </Canvas>

1. 下面就要在Window.Resources中为显示和关闭效果添加Storyboard了，其中showQueryCanvas就是显示效果，closeQueryCanvas是关闭效果。另，程序中涉及到的RenderTransform.Children[0]和[1]，就是上面Resources里的ScaleTransform和RotataTransform。

<Window.Resources>      ... ... 
    <Storyboard x:Key="showQueryCanvas">         <DoubleAnimation Storyboard.TargetName="queryCanvas"                          Storyboard.TargetProperty="Opacity"                          From="0.2" To="1" Duration="0:0:2.5">
       </DoubleAnimation>         <DoubleAnimation Storyboard.TargetName="queryCanvas"                          Storyboard.TargetProperty="RenderTransform.Children[1].Angle"                          From="70" To="0" Duration="0:0:2" >
       </DoubleAnimation>         <DoubleAnimation Storyboard.TargetName="queryCanvas"                          Storyboard.TargetProperty="RenderTransform.Children[0].ScaleX"                          From="0" To="1" Duration="0:0:2" 
                        AccelerationRatio="1">
       </DoubleAnimation>         <DoubleAnimation Storyboard.TargetName="queryCanvas"                          Storyboard.TargetProperty="RenderTransform.Children[0].ScaleY"                          From="0" To="1" Duration="0:0:2" 
                        AccelerationRatio="1">
       </DoubleAnimation>         <DoubleAnimation Storyboard.TargetName="queryCanvas"                          Storyboard.TargetProperty="RenderTransform.Children[0].ScaleX"                          To="0.98" BeginTime="0:0:2" Duration="0:0:0.05" 
                        DecelerationRatio="1">
       </DoubleAnimation>         <DoubleAnimation Storyboard.TargetName="queryCanvas"                          Storyboard.TargetProperty="RenderTransform.Children[0].ScaleY"                          To="0.98" BeginTime="0:0:2" Duration="0:0:0.05" 
                        DecelerationRatio="1">
       </DoubleAnimation>         <DoubleAnimation Storyboard.TargetName="queryCanvas"                          Storyboard.TargetProperty="RenderTransform.Children[0].ScaleX"                          To="1" BeginTime="0:0:2.05" Duration="0:0:0.2"  
                        AccelerationRatio="1">
       </DoubleAnimation>         <DoubleAnimation Storyboard.TargetName="queryCanvas"                                        Storyboard.TargetProperty="RenderTransform.Children[0].ScaleY"                          To="1" BeginTime="0:0:2.05" Duration="0:0:0.2" 
                        AccelerationRatio="1">
       </DoubleAnimation>     </Storyboard>       <Storyboard x:Key="closeQueryCanvas">        <DoubleAnimation Storyboard.TargetName="queryCanvas"                          Storyboard.TargetProperty="RenderTransform.Children[1].Angle"                         To="360" Duration="0:0:1.5" >
      </DoubleAnimation>        <DoubleAnimation Storyboard.TargetName="queryCanvas"                          Storyboard.TargetProperty="Opacity"                         To="0" Duration="0:0:3">
      </DoubleAnimation>        <DoubleAnimation Storyboard.TargetName="queryCanvas"                          Storyboard.TargetProperty="RenderTransform.Children[0].ScaleX"                         To="0" Duration="0:0:1.5" AccelerationRatio="1">
      </DoubleAnimation>        <DoubleAnimation Storyboard.TargetName="queryCanvas"                         Storyboard.TargetProperty="RenderTransform.Children[0].ScaleY"                         To="0" Duration="0:0:1.5" AccelerationRatio="1">
      </DoubleAnimation>     </Storyboard>  </Window.Resources>

2. 效果Over，就要启动事件了。关闭事件已经在上一篇写到关闭窗口图标事件中了，本篇只介绍显示效果事件。显示事件也同样定义到Window.Triggers中。下面程序中myHome、myShop、upgradeShop、myBank为程序上方四个图标的Name值。

<Window.Triggers>     <!-- 关闭窗口图标事件就写在这里 -->     ... ... 
   <EventTrigger SourceName="closeImage" RoutedEvent="Image.MouseLeftButtonDown"> <BeginStoryboard Name="closeQueryCanvasStoryboard" 
 Storyboard="{StaticResource closeQueryCanvas}">
 </BeginStoryboard> </EventTrigger>

   <!-- 下面是显示窗口事件 -->     <EventTrigger SourceName="myHome" RoutedEvent="Image.MouseLeftButtonDown">        <BeginStoryboard Storyboard="{StaticResource showQueryCanvas}"></BeginStoryboard>     </EventTrigger>     <EventTrigger SourceName="myShop" RoutedEvent="Image.MouseLeftButtonDown">        <BeginStoryboard Storyboard="{StaticResource showQueryCanvas}"></BeginStoryboard>     </EventTrigger>     <EventTrigger SourceName="upgradeShop" RoutedEvent="Image.MouseLeftButtonDown">        <BeginStoryboard Storyboard="{StaticResource showQueryCanvas}"></BeginStoryboard>     </EventTrigger>     <EventTrigger SourceName="myBank" RoutedEvent="Image.MouseLeftButtonDown">        <BeginStoryboard Storyboard="{StaticResource showQueryCanvas}"></BeginStoryboard>     </EventTrigger>  </Window.Triggers>

3. 显示窗口效果

4. 关闭窗口效果

待续 … …