Sliders lose value when focus lost

[Richard Ellis]

First things first: we are using version 2012.2.0725.1040 of the Telerik Silverlight 4 controls.

We have a RadWindow containing a UserControl, which in turn has RadSliders added dynamically in code behind as follows:

public class CubiksRadSlider : RadSlider

{

    public int Row { get; set; }

}

 

// Add Slider (rowIndex, slider indexes refer to columns rows of a grid)


CubiksRadSlider slider = new CubiksRadSlider()

{

    Tag = string.Format("{0}_{1}", "slider", rowIndex),

    Maximum = _emailReplyViewModel.Email.MessageOptionText.Count,

    LargeChange = 1,

    Minimum = 0,

    SmallChange = 1,

    Value = 0,

    TickPlacement = TickPlacement.BottomRight,

    TickFrequency = 1,

    Margin = new Thickness(3),

    HorizontalAlignment = HorizontalAlignment.Stretch,

    VerticalAlignment = VerticalAlignment.Center,

    Row = sliderIndex

};

 

slider.ValueChanged += (s, args) => { slider.Value = Math.Round(slider.Value); };

 

//Assign it's grid position

slider.SetValue(Grid.RowProperty, rowIndex + 1);

grid.Children.Add(slider);

grid.InvalidateMeasure();


The problem we are seeing is that, when you switch focus to another RadWindow and back again (it happens when the focus is regained), the sliders seem to reset back to a '0' value.

Any help would be appreciated.

UPDATE: In addition it seems that after the reset, selecting any of the sliders and trying to move it can cause it to jump back to it's originally set position.

[Kiril Vandov]

Hello Richard,

We are aware of that issue and I am happy to inform you that this issue is resolved in our latest binaries. Unfortunately there is no workaround for the issue.

Please excuse us for the inconvenience caused.

Kind regards,
Kiril Vandov
Telerik

[Richard Ellis]

So... does this mean we NEED to update our license.  And will we NEED to update to the Silverlight 5 RadControls rather than the Silverlight 4 build we've been using?

Thanks.

[Kiril Vandov]

Hello Richard,

We highly recommend to our customers to update to our latest binaries as the bug fixes are included there. Furthermore, we are no longer shipping Silverlight4 binaries, you can find more info here, and we strongly encourage our customers to migrate to Silverlight5.

Kind regards,
Kiril Vandov
Telerik