Double Click on Scroll in RadGrid

[Erik]

Hi,

I try to double click on the scroll, it just suddenly select the row not scroll down. My purpose it just to scroll down in grid.

Please help.

[Jack]

Hello eriksurya,

We could not reproduce this issue locally. At this point we did not experienced any troubles with double click and grid vertical scroll. Will be possible for you to give more details on the situation where the issue occurs? If you prefer to send us your application please open a support ticket and we will review what is wrong.

 
Best wishes,
Jack
the Telerik team

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[Erik]

Hi Telerik,

Thanks for your reply. The situasion was: I Loaded all data to grid around 1000 rows.

Then in DoubleClick event, if the user double click it will select lets say the customer id.

The problem occurred when you double click on the vertical scrollbar  to scroll it down faster and the grid will select the value when the scroll stopped. Actually we just wanted to scroll down using double clik on the scroll bar

[Jack]

Hi eriksurya,

This is a really strange issue. Is it possible that you accidentally double clicked on the grid surface instead on the scroll bars? Please open a support ticket and send us your application, so we can investigate the situation.

 
Regards,
Jack
the Telerik team

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[dootndo2]

We loaded the 2007 Q3 for our project today.  This issue is happening to us as well.  Normally you can click on the scrollbar to make it move to that location (or large move value).  When you click on it rapidly, or double click (as if you were moving down the grid) items get selected.

Thanks.

dootndo2

[Jack]

Hi dootndo2,

Thank you for reporting this issue.

We managed to reproduce it locally. Currently, we are refactoring the RadGridView and will revise the whole scrolling subsystem. We will address the issue in our upcoming release. Please, excuse us for the inconvenience.

Don't hesitate to contact us if you have other questions.

Greetings,
Jack
the Telerik team

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[Erik]

Hi telerik,

Any solution for this issue? My version is Q1 2008 SP1 still have this problem

Thanks

[Erik]

Hi Telerik,

Still no solution for this matters? This problem still exist in Q2 2008.


Thanks

[Boyko Markov]

Hello Erik,

Unfortunately, the issue is not resolved yet. However, I have prepared you a simple workaround.

1. You can subscribe to the CurrentRowChanging event and MouseDoubleClick event of RadGridView.

      this.radGridView1.CurrentRowChanging += new CurrentRowChangingEventHandler(radGridView1_CurrentRowChanging);
            this.radGridView1.MouseDoubleClick += new MouseEventHandler(radGridView1_MouseDoubleClick);
        }

2. Create a bool flag which I've called cancelChanging.
        private bool cancelChanging = false;

3. Initialize the flag when the user clicks on the scrollbar
        void radGridView1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            cancelChanging = false;

            RadElement element = this.radGridView1.Behavior.GetHoveredRadElement();

            while (element != null)
            {
                if (element.GetType() == typeof(RadScrollBarElement))
                {
                    cancelChanging = true;
                    break;
                }
                element = element.Parent;
            }      
        }

4. If the flag is true cancel the changing of the current row.
 
        void radGridView1_CurrentRowChanging(object sender, CurrentRowChangingEventArgs e)
        {
            if (cancelChanging)
            {
                e.Cancel = true;
                cancelChanging = false;
            }
        }

I hope this helps.
We are sorry for the inconvenience caused.

Greetings,
Boyko Markov
the Telerik team

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[Mark Blom]

Thanks, this already helped me a lot!!!

[jjroman]

is this resolved?

[Angel]

Hi I have this same mistakes with Q2 2011 SP1 version, I wonder if it was resolved in one of the new versions, Thanks.

[Angel]

Hello, just wanted to know if this bug is already solved, since in Q2 2013 SP1 version, still appears

[Marc Weintraub]

This is still an issue in 2015 Q2.

[Dimitar]

Hi Mark,

Thank you for writing.

I was able to reproduce a case where the CellClick event is fired. It is fired when one is scrolling with the child template scrollbar and then releases the mouse. I have logged this case in our Feedback Portal. You can track the item for status changes and add your vote for it here.

To workaround this issue you can check if the GridViewCellEventArgs argument refers to a column:

void radGridView1_CellClick(object sender, GridViewCellEventArgs e)
{
    if (e.Column != null)
    {
        Console.WriteLine("CellClick");
    }
}

Your Telerik Points have been updated for this report.

Should you have any other questions do not hesitate to ask.

Kind regards,
Dimitar
the Telerik team

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[Curtis]

Has this been fixed/addressed yet?

I'm running 2017 Q2 and the issue is quite problematic.   The 'work around' is quite a hack and I'd rather not have to resort to calculating where the mouse is in order to turn on/off the trapping of the double-click event (I will if there's no alternative!) but I'm not excited about it.

[Curtis]

For what it's worth the previously posted 'work around' only worked sometimes for me.  I don't know if its because of the custom theme I'm using or just the volume of rows I'm dealing with causing a sluggish response from the grid trapping the doubleclick event but here's my modification on the posted work around that has worked for me 100% since implementation:

 

For the two or three dozen of us VB.Net developers still out there - you may also want to add these to the top of your Form source:

Imports Telerik.WinControls
Imports Telerik.WinControls.UI

 

Cheers!

-C

 

    Private cancelChanging As Boolean
    Private Sub gridClaimants_MouseDoubleClick(sender As Object, e As MouseEventArgs) Handles gridClaimants.MouseDoubleClick
        cancelChanging = False
        Dim element As RadElement = gridClaimants.Behavior.GetHoveredRadElement()

        While element IsNot Nothing
            If TypeOf element Is RadScrollBarElement Then
                cancelChanging = True
                Exit While
            End If
            element = element.Parent
        End While

        If Not cancelChanging Then
            If Not IsNothing(gridClaimants.CurrentRow) Then
' Do some work here.
            End If
        End If
    End Sub

    Private Sub gridClaimants_CurrentRowChanging(sender As Object, e As CurrentRowChangingEventArgs) Handles gridClaimants.CurrentRowChanging
        If cancelChanging Then
            e.Cancel = True
            cancelChanging = False
        End If
    End Sub

[Hristo]

Hello Curtis,

Thank you for sharing your solution. I would like to point, that the issue was fixed in the R3 2015 SP1 release. If it is possible please upgrade.

I hope this helps. 

Regards,
Hristo
Progress Telerik