Samples

Usage

Directly in XAML

<simpleChildWindow:ChildWindow
                 IsOpen="{Binding IsChildWindowOpenOrNotProperty}"
                 HorizontalContentAlignment="Stretch"
                 VerticalContentAlignment="Stretch"
                 Padding="15"
                 ChildWindowImage="Error"
                 Title="TestChild 1">
  <Grid>
  </Grid>
</simpleChildWindow:ChildWindow>

Or with the ChildWindowManager

private async void OpenAChildWindow_OnButtonClick(object sender, RoutedEventArgs e)
{
  // opens a cool child window
  await this.ShowChildWindowAsync(new CoolChildWindow() { IsModal = false });
}

Overlay with Opacity

A modal ChildWindow uses by default the GrayBrush3 from MahApps for the OverlayBrush. So the overlay hides the complete content. You can use a SolidColorBrush with an opacity to make the overlay transparent.

<simpleChildWindow:ChildWindow.OverlayBrush>
  <SolidColorBrush Opacity="0.8" Color="{StaticResource Gray2}" />
</simpleChildWindow:ChildWindow.OverlayBrush>