End-User Ungrouping

[Kevin White]

Under the newest Telerik controls for Winforms (2011.1.11.419) -- Ungrouping seems to have changed. Instead of being able to drag from the group panel to ungroup - you must hit the "X". My users have a problem with this and would prefer the Drag and Drop Ungrouping feature.

Was this removed? And if so, is there a workaround I might employ?

Thanks

[Jack]

Hi Kevin White,

Yes, I confirm the issue. We will correct the behavior in our next version - Q2 2011. You can work around it by using custom rows. Please consider the following code:

public class MyGroupRow : GridGroupHeaderRowElement
{
    protected override Type ThemeEffectiveType
    {
        get
        {
            return typeof(GridGroupHeaderRowElement);
        }
    }

    protected override bool ProcessDragOver(Point currentMouseLocation, ISupportDrag dragObject)
    {
        GroupFieldDragDropContext dataContext = dragObject.GetDataContext() as GroupFieldDragDropContext;
        if (dataContext != null)
        {
            return true;
        }
        return base.ProcessDragOver(currentMouseLocation, dragObject);
    }

    protected override void ProcessDragDrop(Point dropLocation, ISupportDrag dragObject)
    {
        GroupFieldDragDropContext dataContext = dragObject.GetDataContext() as GroupFieldDragDropContext;
        if (dataContext != null)
        {
            dataContext.ViewTemplate.GroupDescriptors.Remove(dataContext.GroupDescription);
            return;
        }
        base.ProcessDragDrop(dropLocation, dragObject);
    }
}

public class MyDataRow : GridDataRowElement
{
    protected override Type ThemeEffectiveType
    {
        get
        {
            return typeof(GridDataRowElement);
        }
    }

    protected override bool ProcessDragOver(Point currentMouseLocation, ISupportDrag dragObject)
    {
        GroupFieldDragDropContext dataContext = dragObject.GetDataContext() as GroupFieldDragDropContext;
        if (dataContext != null)
        {
            return true;
        }
        return base.ProcessDragOver(currentMouseLocation, dragObject);
    }

    protected override void ProcessDragDrop(Point dropLocation, ISupportDrag dragObject)
    {
        GroupFieldDragDropContext dataContext = dragObject.GetDataContext() as GroupFieldDragDropContext;
        if (dataContext != null)
        {
            dataContext.ViewTemplate.GroupDescriptors.Remove(dataContext.GroupDescription);
            return;
        }
        base.ProcessDragDrop(dropLocation, dragObject);
    }
}

You should handle the CreateRow event to replace the rows:

void radGridView1_CreateRow(object sender, GridViewCreateRowEventArgs e)
{
    if (e.RowInfo is GridViewDataRowInfo)
    {
        e.RowType = typeof(MyDataRow);
    }
    if (e.RowInfo is GridViewGroupRowInfo)
    {
        e.RowType = typeof(MyGroupRow);
    }
}

I updated your Telerik points for reporting this issue. Should you have any further questions, do not hesitate to contact me.

Kind regards,
Jack
the Telerik team

[Kevin White]

Thank you, this works well.

Any estimate on a release date for this fix?

[Jack]

Hi Kevin,

Our next release is scheduled for July, however, I am not able to provide you with exact date. If you have other questions, do not hesitate to ask.
 
Greetings,
Jack
the Telerik team