Início / coding / Perguntas / 79434883
Accepted
kinton
Asked: 2025-02-13 09:38:46 +0800 CST

Alterar transparência da sobreposição da janela pai com ContentDialog

  • 772

Quero alterar a transparência da sobreposição exibida na janela pai quando o ContentDialog estiver aberto. Estou usando o WinUI 3. Dei uma olhada no generic.xaml e tentei alterar algumas coisas, mas não houve efeito algum.

Modifiquei o código a seguir, mas não vi nenhum resultado.

      <Application.Resources>
        <ResourceDictionary>
          <ResourceDictionary.MergedDictionaries>
            <XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls"/>
          </ResourceDictionary.MergedDictionaries>
          <!-- Other app resources here -->
    
          <SolidColorBrush x:Key="ContentDialogBackgroundThemeBrush" Color="Red" />
          <SolidColorBrush x:Key="ContentDialogBorderThemeBrush" Color="Red" />
          <SolidColorBrush x:Key="ContentDialogContentForegroundBrush" Color="Red" />
          <SolidColorBrush x:Key="ContentDialogDimmingThemeBrush" Color="Red" />
          <SolidColorBrush x:Key="SystemControlPageBackgroundBaseMediumBrush" Color="red" />
          <SolidColorBrush x:Key="SystemControlPageBackgroundMediumAltMediumBrush" Color="red" />
    
          <ResourceDictionary.ThemeDictionaries>
            <ResourceDictionary x:Key="Default">
              <SolidColorBrush x:Key="ContentDialogDimmingThemeBrush" Color="Red" />
              <SolidColorBrush x:Key="SystemControlPageBackgroundMediumAltMediumBrush" Color="Red" />
              <StaticResource x:Key="ContentDialogLightDismissOverlayBackground" ResourceKey="SystemControlPageBackgroundMediumAltMediumBrush" />
            </ResourceDictionary>
            <ResourceDictionary x:Key="Dark">
              <SolidColorBrush x:Key="ContentDialogDimmingThemeBrush" Color="Red" />
              <SolidColorBrush x:Key="SystemControlPageBackgroundMediumAltMediumBrush" Color="Red" />
              <StaticResource x:Key="ContentDialogLightDismissOverlayBackground" ResourceKey="SystemControlPageBackgroundMediumAltMediumBrush" />
            </ResourceDictionary>
          </ResourceDictionary.ThemeDictionaries>
        </ResourceDictionary>
    
      </Application.Resources>
winui-3

1 respostas

  1. Best Answer

    Tente o seguinte no Openedevento:

    private void ContentDialog_Opened(ContentDialog sender, ContentDialogOpenedEventArgs args)
{
    if (VisualTreeHelper
        .GetOpenPopupsForXamlRoot(this.XamlRoot)
        .FirstOrDefault() is not Popup popup)
    {
        return;
    }

    if ((popup.Child as ContentDialog)?.FindAscendant<Canvas>() is not Canvas popupRoot ||
        popupRoot.Children.OfType<Rectangle>().FirstOrDefault(x => x.Name is "SmokeLayerBackground") is not Rectangle smokeLayerBackground)
    {
        return;
    }

    // This will change the overlay background.
    smokeLayerBackground.Fill = new SolidColorBrush()
    {
        Color = Colors.SkyBlue,
        Opacity = 0.5,
    };
}
    • 1

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