Problem with focus in RadNumericUpDown

[hwsoderlund]

When placed inside a scroll viewer the control does not receive focus properly. I've pasted some code with embedded instructions on how to replicate the bug:

<UserControl x:Class="SilverlightApplication6.MainPage"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:teleriknav="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation"
             xmlns:telerikbase="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls"
             xmlns:telerikinput="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Input"
             xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
             xmlns:local="clr-namespace:SilverlightApplication6"
             mc:Ignorable="d"
             Width="640"
             Height="480">
    <Grid x:Name="LayoutRoot">
        <Grid.RowDefinitions>
            <RowDefinition></RowDefinition>
            <RowDefinition></RowDefinition>
        </Grid.RowDefinitions>

        <ScrollViewer>
            <StackPanel>
                <TextBlock TextWrapping="Wrap"
                           Text="Click the up/down buttons. The control never receives focus. Now click in the textbox part (to the left of the actual digits). The control loses focus immediately upon receiving it."></TextBlock>
                <telerikinput:RadNumericUpDown HorizontalAlignment="Left"
                                               VerticalAlignment="Top"
                                               Width="100"
                                               GotFocus="RadNumericUpDown_GotFocus"
                                               LostFocus="RadNumericUpDown_LostFocus">
                    <i:Interaction.Behaviors>
                        <local:NoDecimalDigits></local:NoDecimalDigits>
                    </i:Interaction.Behaviors>
                </telerikinput:RadNumericUpDown>
            </StackPanel>
        </ScrollViewer>

        <TextBox x:Name="TxtTrace"
                 IsReadOnly="True"
                 HorizontalAlignment="Stretch"
                 VerticalAlignment="Stretch"
                 TextWrapping="Wrap"
                 Grid.Row="1"></TextBox>

    </Grid>
</UserControl>

And c#:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Controls.Primitives;
using System.Diagnostics;
using Telerik.Windows.Controls;
using System.Windows.Interactivity;
using System.Globalization;

namespace SilverlightApplication6
{
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();
        }

        private void RadNumericUpDown_GotFocus(object sender, RoutedEventArgs e)
        {
            TxtTrace.Text += "GotFocus" + Environment.NewLine;
        }

        private void RadNumericUpDown_LostFocus(object sender, RoutedEventArgs e)
        {
            TxtTrace.Text += "LostFocus" + Environment.NewLine;
        }
    }

    public class NoDecimalDigits : Behavior<RadNumericUpDown>
    {
        protected override void OnAttached()
        {
            this.AssociatedObject.Loaded += AssociatedObject_Loaded;

            base.OnAttached();
        }

        protected override void OnDetaching()
        {
            this.AssociatedObject.Loaded -= AssociatedObject_Loaded;

            base.OnDetaching();
        }

        void AssociatedObject_Loaded(object sender, RoutedEventArgs e)
        {
            var info = new NumberFormatInfo();
            info.NumberDecimalDigits = 0;
            info.PercentDecimalDigits = 0;
            AssociatedObject.NumberFormatInfo = info;

            //unhook
            AssociatedObject.Loaded -= AssociatedObject_Loaded;
        }


    }
}

[hwsoderlund]

Follow-up: There was a similar problem in RadSlider, and that was solved only moments ago. There is more information in the support ticket (275153). I am pretty sure the two issues are related.

[Konstantina]

Hi,

Thank you for contacting us and sorry for the delayed response.

We were able to reproduce the problem. We will do our best to fix the issue for the next internal build. Sorry for the inconvenience that this has caused you.

If you have further questions please feel free to contact us again.

Greetings,
Konstantina
the Telerik team

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