Hi,
I currently develop an application on Windows 10 on a tactile device uses a RadPageView (explorerBar mode).
I want to use gesture to control the scroll, i set the enableGesture to Pan.
And in PanGesture event, i have the code :
If CType(CType(sender, RadPageView).GetChildAt(0).GetChildAt(3), Telerik.WinControls.UI.RadScrollBarElement).Visibility = ElementVisibility.Visible Then If CType(CType(sender, RadPageView).GetChildAt(0).GetChildAt(3), Telerik.WinControls.UI.RadScrollBarElement).Value + e.Offset.Height >= CType(sender, RadPageView).VerticalScroll.Minimum And _ CType(CType(sender, RadPageView).GetChildAt(0).GetChildAt(3), Telerik.WinControls.UI.RadScrollBarElement).Value + e.Offset.Height <= CType(sender, RadPageView).VerticalScroll.Maximum Then CType(sender, RadPageView).VerticalScroll.Value = CType(CType(sender, RadPageView).GetChildAt(0).GetChildAt(3), Telerik.WinControls.UI.RadScrollBarElement).Value + e.Offset.Height End If CType(CType(sender, RadPageView).GetChildAt(0).GetChildAt(3), Telerik.WinControls.UI.RadScrollBarElement).Value += e.Offset.Height End IfOnly the scroll bar moves, not the control
Thanks for your help :)
NB : I'm using Q1-2015
4 Answers, 1 is accepted
Thank you for writing.
You need to call the InvalidateMeasure method in order to properly update the view after the scroll value is set:
Private Sub radPageView1_PanGesture(ByVal sender As Object, ByVal e As Telerik.WinControls.PanGestureEventArgs) Dim el As RadPageViewExplorerBarElement = TryCast(Me.radPageView1.ViewElement, RadPageViewExplorerBarElement) If el.Scrollbar.IsElementVisible Then e.Handled = True If e.Offset.Height > 0 AndAlso el.Scrollbar.Value + 10 < el.Scrollbar.Maximum Then el.Scrollbar.Value += 10 el.InvalidateMeasure() End If If e.Offset.Height < 0 AndAlso el.Scrollbar.Value - 10 >= 0 Then el.Scrollbar.Value -= 10 el.InvalidateMeasure() End If End IfEnd SubPlease let me know if there is something else I can help you with.
Dimitar
Telerik
Rank 1
Rank 1
Veteran
Hi Dimitar,
Could you please provide me the same functionality in C# ( Telerik winforms ).
Thanks,
Fahmi
Hello, Fahmi,
You can find below the code in C#:
private void RadPageView1_PanGesture(object sender, PanGestureEventArgs e)
{
RadPageViewExplorerBarElement el = this.radPageView1.ViewElement as RadPageViewExplorerBarElement;
if (el.Scrollbar.IsElementVisible)
{
e.Handled = true;
if (e.Offset.Height > 0 && el.Scrollbar.Value + 10 < el.Scrollbar.Maximum)
{
el.Scrollbar.Value += 10;
el.InvalidateMeasure();
}
if (e.Offset.Height < 0 && el.Scrollbar.Value - 10 >= 0)
{
el.Scrollbar.Value -= 10;
el.InvalidateMeasure();
}
}
}Feel free to use the free Telerik Code Converter if you need any further code converting: https://converter.telerik.com/
I hope this information helps.
Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik
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