SilverlightApp ElementsFromPoint

[Jason]

Is there a known issue for this method? I am finding that it only returns elements found in the VisualTree.Root. Meaning that if there are any Popups active/visible, they will not be included in the ElementsFromPoint return list. In this way it is not truly returning all available elements at the given point. Please advise.

[Plamen]

Hello Jason,

You're correct. The current implementation of this method returns only the elements contained in the VisualTree.Root. I filed a bug on this. You can track its progress and vote for the PITS Issue here: Public URL.

I've also updated your Telerik points for bringing this to our attention.

Regards,
Plamen
the Telerik team

[Jason]

Thanks Plamen,

Until the fix is implemented I have worked around the issue using the following in the case of Popups...

... pseudo ...

if ( app.Popups.Count > 0 )

{

   currentElements = FindElementsFromPoint( p, app.Popups[ index ].VisualTree.Root );

}

... pseudo ... 

 

public List<FrameworkElement> FindElementsFromPoint( System.Drawing.Point point, FrameworkElement rootFrameworkElement )

{

    List<FrameworkElement> frameworkElementList = new List<FrameworkElement>();

    SearchElementsForPoint( point, rootFrameworkElement, frameworkElementList );

    return frameworkElementList;

}

 

public void SearchElementsForPoint( System.Drawing.Point point, FrameworkElement frameworkElement, List<FrameworkElement> frameworkElementList )

{

    if ( frameworkElement != null )

    {

        if ( frameworkElement.GetRectangle().Contains( point ) )

        {

            frameworkElementList.Add( frameworkElement );

        }

 

        if ( frameworkElement.Children != null )

        {

            foreach ( FrameworkElement child in frameworkElement.Children )

            {

                if ( child != null )

                {

                    SearchElementsForPoint( point, child, frameworkElementList );

                }

            }

        }

    }

}

I look forward to the fix as this is computationally expensive :)

[Plamen]

Hi Jason,

That is excellent! I am glad to hear you found a workable workaround on your own. I really appreciate the update and hope to have this bug fixed soon.

All the best,
Plamen
the Telerik team