DevTools for .NET

Answered Bad flicker while scrolling down

Franco

Posted on Sep 5, 2011 (permalink)

Good afternoon.
    I have a problem with RadPanelBar. I use VB Express 2008.
I create a new WinForm project and add a RadPanelBar control. Dock = True, GroupStyle = ExplorerBarStyle.
This is the code:

Imports Telerik.WinControls.UI



Public Class Form1

  Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    Dim rpbge As RadPanelBarGroupElement



    For i As Integer = 0 To 10

      rpbge = New RadPanelBarGroupElement

      rpbge.Caption = "Group" & i

      rpbge.EnableHostControlMode = True

      RadPanelBar1.Items.Add(rpbge)

    Next



    Dim rlc As New RadListControl

    rlc.Height = 2

    rlc.Width = rpbge.ContentPanel.ClientSize.Width

    rlc.Anchor = AnchorStyles.Left Or AnchorStyles.Right Or AnchorStyles.Top

    rpbge.ContentPanel.Controls.Add(rlc)



    rpbge.Expanded = True

  End Sub

End Class

Now:
- Run the project and scroll down with the vertical scroll bar.
- Collapse and Expand the last group (Group10).
- Now try to scroll down again with the vertical scroll bar and you'll see the flicker.
Is there any solution?
Thank you in advance.
Gianfranco

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Answer Stefan Stefan

Posted on Sep 8, 2011 (permalink)

Hi Franco,

I confirm that this issue appears when using the RadPanelBar control. This is an obsolete control and we plan to remove it from our suite. We no longer support it. You can use the RadPageView control instead. For more information about the upgrade process, please refer to the following help article: http://www.telerik.com/help/winforms/pageview-upgrading-to-radpageview.html.

If you need further assistance, please do not hesitate to contact us.

Regards,
Stefan
the Telerik team

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