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TappedEventHandler Делегат

  • Ссылка

Определение

Пространство имен:
Microsoft.UI.Xaml.Input
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Представляет метод, обрабатывающий событие Tapped .

public delegate void TappedEventHandler(Platform::Object ^ sender, TappedRoutedEventArgs ^ e);
[Windows.Foundation.Metadata.ContractVersion(typeof(Microsoft.UI.Xaml.WinUIContract), 65536)]
[Windows.Foundation.Metadata.Guid(3053483251, 4699, 21326, 143, 156, 151, 105, 189, 63, 15, 100)]
public delegate void TappedEventHandler(object sender, TappedRoutedEventArgs e);
Public Delegate Sub TappedEventHandler(sender As Object, e As TappedRoutedEventArgs)

Параметры

sender
Object

Platform::Object

Объект, к которому присоединен обработчик событий.

e
TappedRoutedEventArgs

Данные для события.

Атрибуты
ContractVersionAttribute GuidAttribute

Примеры

В следующем примере кода показан сценарий 3 из примера входных данных. В этом коде показаны некоторые шаблоны использования для прямой манипуляции с помощью событий Holding, Tapped, DoubleTapped и RightTapped .

<StackPanel>
  <StackPanel Orientation="Horizontal" Margin="0,10,0,0">
    <Button x:Name="scenario3Reset" Content="Reset" Margin="0,0,10,0" 
      Click="Scenario3Reset" />
  </StackPanel>
  <StackPanel Orientation="Horizontal">
    <Border x:Name="bTapped" Background="Red" 
      Height="100" Width="150" CornerRadius="20" Margin="20" 
      BorderBrush="Black" BorderThickness="2">
      <TextBlock Style="{StaticResource BasicTextStyle}" Text="Tap" 
        HorizontalAlignment="Center" VerticalAlignment="Center"/>
    </Border>
    <Border x:Name="bDoubleTapped" Background="Red" 
      Height="100" Width="150" CornerRadius="20" Margin="20" 
      BorderBrush="Black" BorderThickness="2">
      <TextBlock Style="{StaticResource BasicTextStyle}" 
        Text="Double Tap" 
        HorizontalAlignment="Center" VerticalAlignment="Center"/>
    </Border>
    <Border x:Name="bRightTapped" Background="Red" 
      Height="100" Width="150" CornerRadius="20" Margin="20" 
      BorderBrush="Black" BorderThickness="2">
      <TextBlock Style="{StaticResource BasicTextStyle}" 
        Text="Press, Hold and Lift" TextWrapping="Wrap" 
        HorizontalAlignment="Center" VerticalAlignment="Center"/>
    </Border>
    <Border x:Name="bHolding" Background="Red" 
      Height="100" Width="150" CornerRadius="20" Margin="20" 
      BorderBrush="Black" BorderThickness="2">
      <TextBlock Style="{StaticResource BasicTextStyle}" Text="Hold" 
        HorizontalAlignment="Center" VerticalAlignment="Center"/>
    </Border>
  </StackPanel>
</StackPanel>

public Scenario3()
{
    this.InitializeComponent();
    bTapped.Tapped += new TappedEventHandler(bTapped_Tapped);
    bDoubleTapped.DoubleTapped += new DoubleTappedEventHandler(
        bDoubleTapped_DoubleTapped);
    bRightTapped.RightTapped += new RightTappedEventHandler(
        bRightTapped_RightTapped);
    bHolding.Holding += new HoldingEventHandler(bHolding_Holding);
}

private void Scenario3UpdateVisuals(Border border, String gesture)
{
    switch (gesture.ToLower())
    {
        case "holding":
            border.Background = new SolidColorBrush(Colors.Yellow);
            break;
        default:
            border.Background = new SolidColorBrush(Colors.Green);
            break;
    }

    ((TextBlock)border.Child).Text = gesture;
}

private void bHolding_Holding(object sender, HoldingRoutedEventArgs e)
{
    string holdingState = 
        (e.HoldingState == Windows.UI.Input.HoldingState.Started) ? 
        "Holding" : "Held";
    Scenario3UpdateVisuals(sender as Border, holdingState);
}

private void bDoubleTapped_DoubleTapped(object sender, 
    DoubleTappedRoutedEventArgs e)
{
    Scenario3UpdateVisuals(sender as Border, "Double Tapped");
}

private void bRightTapped_RightTapped(object sender, 
    RightTappedRoutedEventArgs e)
{
    Scenario3UpdateVisuals(sender as Border, "Right Tapped");
}

private void bTapped_Tapped(object sender, TappedRoutedEventArgs e)
{
    Scenario3UpdateVisuals(sender as Border, "Tapped");
}

private void Scenario3Reset(object sender, RoutedEventArgs e)
{
    Scenario3Reset();
}

private void Scenario3Reset()
{
    bTapped.Background = new SolidColorBrush(Colors.Red);
    bHolding.Background = new SolidColorBrush(Colors.Red);
    bDoubleTapped.Background = new SolidColorBrush(Colors.Red);
    bRightTapped.Background = new SolidColorBrush(Colors.Red);
}

Применяется к