How to open the popup for the RadDropDownButton at the user's mouseclick position?

[Rob]

Hello Telerik,

I'm using a RadDropDownButton as a sort of clickable popup tooltip.  I'd like it if the popup would appear positioned at the user's mouseclick coordinate.

I thought that was the intent of DropDownPlacement="Absolute" but it seems to set it below the button regardless.  I wondered if it might have been the logic that repositions the popup for screen edge detection, but even if I place the popup in the middle of the screen I still don't get the desired effect.

Am I doing something incorrectly, or is there a way to move the popup?

[Petar Mladenov]

Hello Rob,

This cannot be achieved with the RadDropDownButton. You said that you try it as a sort of clickable PopupTooltip. So, does creating a custom control (Button + Popup) fit in your scenario? If yes, you could use a RadButton and System.Windows.Controls.Popup that is controlled in the MouseLeftButtonDown event handler like so:

public MainPage()
       {
           InitializeComponent();
           this.button.AddHandler(RadButton.MouseLeftButtonDownEvent, new MouseButtonEventHandler(RadButton_MouseLeftButtonDown), true);
       }

       private void RadButton_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
       {

           System.Windows.Controls.Primitives.Popup pop= new System.Windows.Controls.Primitives.Popup();
           pop.Width = 300;
           pop.Height = 300;
           pop.Child = new Rectangle() { Width = 200, Height = 200, Fill = new SolidColorBrush() { Color = Colors.Blue }};
           pop.VerticalOffset = e.GetPosition(this.LayoutRoot).Y;
           pop.HorizontalOffset = e.GetPosition(this.LayoutRoot).X;
           pop.IsOpen = true;

       }

Please let us know if this helped you.

Regards,
Petar Mladenov
the Telerik team