在WinRT App中檢測關鍵筆畫

我有一個包含畫布和幾個按鈕的基本頁面模板。畫布有一些動畫正在進行。我想在這個頁面上檢測關鍵筆畫。在WinRT App中檢測關鍵筆畫

我在LayoutRoot網格上使用了KeyDown事件，它以前工作過，但當我構建應用程序時，它進一步停止工作。我也嘗試在PageRoot中使用KeyDown事件，但仍然不起作用。

我正在粘貼下面的XAML。

<common:LayoutAwarePage 
x:Name="pageRoot" 
x:Class="Shooter.Game" 
DataContext="{Binding DefaultViewModel, RelativeSource={RelativeSource Self}}" 
IsTabStop="false" 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
xmlns:local="using:Shooter" 
xmlns:common="using:Shooter.Common" 
xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
mc:Ignorable="d" > 

<Page.Resources> 

    <!-- TODO: Delete this line if the key AppName is declared in App.xaml --> 
    <x:String x:Key="AppName">Hits</x:String> 
</Page.Resources> 

<!-- 
    This grid acts as a root panel for the page that defines two rows: 
    * Row 0 contains the back button and page title 
    * Row 1 contains the rest of the page layout 
--> 
<Grid Style="{StaticResource LayoutRootStyle}" Background="Navy" KeyDown="Grid_KeyDown_1" > 
    <Grid.RowDefinitions> 
     <RowDefinition Height="95"/> 
     <RowDefinition Height="*"/> 
     <RowDefinition Height="150" /> 
    </Grid.RowDefinitions> 

    <!-- Back button and page title --> 
    <Grid Name="navBar"> 
     <Grid.ColumnDefinitions> 
      <ColumnDefinition Width="Auto"/> 
      <ColumnDefinition Width="*"/> 
     </Grid.ColumnDefinitions> 
     <Button x:Name="backButton" Grid.Column="0" Click="GoBack" IsEnabled="{Binding Frame.CanGoBack, ElementName=pageRoot}" Style="{StaticResource BackButtonStyle}"/> 
     <TextBlock Visibility="Collapsed" x:Name="pageTitle" Grid.Column="1" Text="{StaticResource AppName}" Style="{StaticResource PageHeaderTextStyle}"/> 
     <TextBlock x:Name="hitCountTxt" Grid.Column="1" Text="Hits: 0" Style="{StaticResource PageHeaderTextStyle}" /> 
     <TextBlock x:Name="missCountTxt" Grid.Column="1" Text="Miss: 0" Style="{StaticResource PageHeaderTextStyle}" HorizontalAlignment="Right" /> 
    </Grid> 
    <Grid Grid.Row="1" Name="gameBoard"> 
     <Canvas Name="warZone" Width="Auto" /> 
    </Grid> 
    <Grid Grid.Row="2" Name="dashBoard"> 
     <Grid.ColumnDefinitions> 
      <ColumnDefinition Width="200" /> 
      <ColumnDefinition Width="*" /> 
      <ColumnDefinition Width="200" /> 
     </Grid.ColumnDefinitions> 
     <Button Name="Dit" Grid.Column="0" Content="Dit" Width="200" Height="140" FontSize="40" Click="Dit_Click" /> 
     <Button Name="Dah" Grid.Column="2" Content="Dah" Width="200" Height="140" FontSize="40" Click="Dah_Click" /> 
     <TextBlock Name="fireCodeTxt" Grid.Column="1" VerticalAlignment="Center" HorizontalAlignment="Center" Text="No shots Fired!" FontSize="60" /> 
    </Grid> 

    <VisualStateManager.VisualStateGroups> 

     <!-- Visual states reflect the application's view state --> 
     <VisualStateGroup x:Name="ApplicationViewStates"> 
      <VisualState x:Name="FullScreenLandscape"/> 
      <VisualState x:Name="Filled"/> 

      <!-- The entire page respects the narrower 100-pixel margin convention for portrait --> 
      <VisualState x:Name="FullScreenPortrait"> 
       <Storyboard> 
        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style"> 
         <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PortraitBackButtonStyle}"/> 
        </ObjectAnimationUsingKeyFrames> 
       </Storyboard> 
      </VisualState> 

      <!-- The back button and title have different styles when snapped --> 
      <VisualState x:Name="Snapped"> 
       <Storyboard> 
        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style"> 
         <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedBackButtonStyle}"/> 
        </ObjectAnimationUsingKeyFrames> 
        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="pageTitle" Storyboard.TargetProperty="Style"> 
         <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedPageHeaderTextStyle}"/> 
        </ObjectAnimationUsingKeyFrames> 
       </Storyboard> 
      </VisualState> 
     </VisualStateGroup> 
    </VisualStateManager.VisualStateGroups> 
</Grid>

來源

2012-10-01 Omkar Khair

您可以訂閱Window.Current.CoreWindow.KeyDown/Up在NavigatedTo事件和NavigatedFrom退訂。這些應該工作。否則，具有焦點的控件將有機會處理這些事件，並將它們標記爲「處理」以防止它們冒泡。

來源

2012-10-02 08:39:05

您可以在頁面構建中更好地訂閱按鍵向上/向下事件。請參閱以下代碼：

public MyPage() 
    { 
     InitializeComponent();    
     KeyUp += MyPage_KeyUp;   
    } 

    private void MyPage_KeyUp(object sender, KeyRoutedEventArgs e) 
    { 
     //Your code here 
    }

來源

2015-02-03 08:31:09 Vishal

在WinRT App中檢測關鍵筆畫

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