How to change PopupButton.StayOpen in PopupButtonContent?

Hello,

The PopupButton.StaysOpen property needs to be set prior to the popup being opened.  It tells the PopupButton to attach to some extra events that aren't watched otherwise.  That's why it's not applying immediately when you set it while the popup is already open.

Hello,

Thank you for you reply.

I'd like to show dialog by clicking button in PopupContent and set PopupButton.StayOpen = true during showing dialog only.

After close the dialog, I want to close popup by click outside of popup content.

Is there any good solution?

<Window
    x:Class="PopupSample.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:shared="http://schemas.actiprosoftware.com/winfx/xaml/shared"
    Title="MainWindow"
    mc:Ignorable="d">
    <Grid>
        <shared:PopupButton
            x:Name="MyPopupButton"
            HorizontalAlignment="Left"
            VerticalAlignment="Top"
            Content="Popup Button">
            <shared:PopupButton.PopupContent>
                <Button
                    x:Name="ShowDialogButton"
                    Margin="8"
                    Click="ShowDialogButton_Click"
                    Content="ShowDialog" />
            </shared:PopupButton.PopupContent>
        </shared:PopupButton>
    </Grid>
</Window>

using System.Windows;

namespace PopupSample
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void ShowDialogButton_Click(object sender, RoutedEventArgs e)
        {
            MyPopupButton.StaysOpen = true;

            var window = new Window { Title = "SubWindow", Height=200, Width=400 };
            window.ShowDialog();

            MyPopupButton.StaysOpen = false;
        }
    }
}

Hello,

Unfortunately the only thing you could do here is try to close the popup, then set StaysOpen=true, the reopen the popup, and show the Window.  That might work.