GridViewComboBoxColumn out of focus when scrolling

[Elad]

Hi,

I'm using Telerik.WinControls.GridView version 2012.1.321.20.
I have a GridView with a GridViewComboBoxColumn, and the problem I have is that when the box is open and I click on the scroll square- than it's like the focus is out and the comboBox is closed (it's like freezing for 2 seconds and than closing...).

Also, I'm using the next definitions, as you recommended before:

public class CustomDropDownListEditor : RadDropDownListEditor
{
    protected override RadElement CreateEditorElement()
    {
        return new CustomDropDownListEditorElement();
    }
}

public class CustomDropDownListEditorElement : RadDropDownListEditorElement
{
    protected override RadPopupControlBase CreatePopupForm()
    {
        this.Popup = new CustomDropDownPopupForm(this);
        this.Popup.VerticalAlignmentCorrectionMode = AlignmentCorrectionMode.SnapToOuterEdges;
        this.Popup.SizingMode = this.DropDownSizingMode;
        this.Popup.Height = this.DropDownHeight;
        this.Popup.HorizontalAlignmentCorrectionMode = AlignmentCorrectionMode.Smooth;
        this.Popup.RightToLeft = this.RightToLeft ? System.Windows.Forms.RightToLeft.Yes : System.Windows.Forms.RightToLeft.Inherit;

        this.WirePopupFormEvents(this.Popup);
        return Popup;
    }
}

public class CustomDropDownPopupForm : DropDownPopupForm
{
    public CustomDropDownPopupForm(RadDropDownListElement owner): base(owner) {}

    public override string ThemeClassName
    {
        get { return typeof(DropDownPopupForm).FullName; }
        set {}
    }

    public override void ClosePopup(PopupCloseInfo info)
    {
        base.ClosePopup(info);
        if (info.CloseReason == RadPopupCloseReason.Keyboard)
        {
            ((RadGridView)this.OwnerElement.ElementTree.Control).EndEdit();
        }
    }

    protected override void OnMouseUp(MouseEventArgs e)
    {
        base.OnMouseUp(e);
        ((RadGridView)this.OwnerElement.ElementTree.Control).EndEdit();
    }
}

You should handle the EditorRequired event to replace the editor:
void radGridView1_EditorRequired(object sender, EditorRequiredEventArgs e)
{
    if (e.EditorType == typeof(RadDropDownListEditor))
    {
        e.EditorType = typeof(CustomDropDownListEditor);
    }
}

What should I do in order to not loose the focus when click on scrolling? I need the user to scroll up/doun and choose another option from the list.

I'm attaching an image of my comboBox.

Thanks,
Hila.

[Plamen]

Hi Hila,

Thank you for writing.

If I understand your case correctly, you need to introduce the following modification to the currently employed approach:

protected override void OnMouseUp(MouseEventArgs e)
{
    base.OnMouseUp(e);

    if (this.OwnerDropDownListElement.ListElement.ViewElement.ControlBoundingRectangle.Contains(e.Location))
    {
        ((RadGridView)this.OwnerElement.ElementTree.Control).EndEdit();
    }
}

This will keep the drop-down opened until there is a MouseUp that is outside the dropdown bouns. I am attaching a sample project which demonstrates the modification.

I hope that helps.

Greetings,
Plamen
the Telerik team

[Elad]

Thanks,

that was helpful!

Hila.