RadSlider inside initially hidden elements (e.g. RadToolTip)

PROBLEM: 

When a RadSlider control is placed in initially invisible element it does not render properly when shown

SOLUTION:

The RadSlider control calculates its track's size according to its parent element. That is the reason for its incorrect rendering when its parent is initially invisible and gets visible later, after the RadSlider control has been initialized.

You can solve this problem by forcing the RadSlider to recalculate its size when it is being shown. This can be achieved by obtaining a reference to it and then calling its repaint() method.

In the attached file you can find a sample demonstrative project of this approach - it contains a RadToolTip with a RadSlider in it. The RadSlider's repaint() method is executed when it is shown - in the RadToolTip OnClientShow eventhadler:

        <script type="text/javascript">
        function OnClientShow(sender, eventArgs)
        {
           var slider = $find("<%= RadSlider1.ClientID %>");
           slider.repaint();
        }
        </script>

        <asp:Label ID="Label1" runat="server" Text="Hover here to display the tooltip"></asp:Label>
        <telerik:RadToolTip ID="RadToolTip1" runat="server" TargetControlID="Label1" RelativeTo="Element"
            OnClientShow="OnClientShow" HideEvent="LeaveTargetAndToolTip">
            <telerik:RadSlider ID="RadSlider1" runat="server" />
        </telerik:RadToolTip>