Customize behavior for PopupViewer - Open URI and open attachment

[bsundsbo]

FieldsPopupElementView and AttachmentsPopupElementView has some default behavior for opening an attachment (saves to disk) and open URL in default browser. To be able to override this property, I had to create a Custom PopupViewer, custom AttachmentsPopupElementView and a custom FieldsPopupElementView. I also had to duplicate the ControlTemplate to use these popup elements templates.

Being able to override this directly on the PopupViewer, be it add behaviors to a collection, events that are routed from the PopupElements, or some other clever easy override would be excellent.

For my scenario, I wish to open URL and attachments from within my application. If I don't override this behavior directly on PopupViewer, the default behavior of default browser or save attachment would be perfectly fine.

[dotMorten]

Looks like we actually added this to the MAUI version but not the WPF version:

arcgis-maps-sdk-dotnet-toolkit/src/Toolkit/Toolkit/UI/Controls/PopupViewer/PopupViewer.Maui.cs

Lines 129 to 163 in a6ee2c2

	public event EventHandler<PopupAttachmentClickedEventArgs>? PopupAttachmentClicked;
	internal bool OnPopupAttachmentClicked(PopupAttachment attachment)
	{
	var handler = PopupAttachmentClicked;
	if (handler is not null)
	{
	var args = new PopupAttachmentClickedEventArgs(attachment);
	PopupAttachmentClicked?.Invoke(this, args);
	return args.Handled;
	}
	return false;
	}
	}
	/// <summary>
	/// Event argument for the <see cref="PopupViewer.PopupAttachmentClicked"/> event.
	/// </summary>
	public class PopupAttachmentClickedEventArgs : EventArgs
	{
	internal PopupAttachmentClickedEventArgs(PopupAttachment attachment)
	{
	Attachment = attachment;
	}
	/// <summary>
	/// Gets or sets a value indicating whether the event handler has handled the event and the default action should be prevented.
	/// </summary>
	public bool Handled { get; set; }
	/// <summary>
	/// Gets the attachment that was clicked.
	/// </summary>
	public PopupAttachment Attachment { get; }
	}

@bsundsbo would something like this work for you?