Drag WPF Popup control

Question

the WPF Popup control is nice, but somewhat limited in my opinion. is there a way to \"drag\" a popup around when it is opened (like with the DragMove() method of windows)?<

Answer 1

Here's a simple solution using a Thumb.

• Subclass Popup in XAML and codebehind
• Add a Thumb with width/height set to 0 (this could also be done in XAML)
• Listen for MouseDown events on the Popup and raise the same event on the Thumb
• Move popup on DragDelta

XAML:

C#:

public partial class DraggablePopup : Popup 
{
    public DraggablePopup()
    {
        var thumb = new Thumb
        {
            Width = 0,
            Height = 0,
        };
        ContentCanvas.Children.Add(thumb);

        MouseDown += (sender, e) =>
        {
            thumb.RaiseEvent(e);
        };

        thumb.DragDelta += (sender, e) =>
        {
            HorizontalOffset += e.HorizontalChange;
            VerticalOffset += e.VerticalChange;
        };
    }
}