Disappearing panes after LoadLayout

[Austin]

In some circumstances a RadPaneGroup will not show content using a loaded layout. Can reproduce with controls version 2011.2.1010.1040 and 2011.3.1020.1040.

To reproduce:

1. Dock the second pane on the right side of the split container (see docking_layout.png)
2. Save the layout
3. Refresh the application
4. Load the layout
5. Make the second pane hidden
6. Make the second pane visible (see docking_problem.png)

Example XAML:

<UserControl x:Class="DockingPersistence.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:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">

    <Grid x:Name="LayoutRoot" Background="White">
        <Grid.RowDefinitions>
            <RowDefinition Height="30"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <StackPanel Orientation="Horizontal">
            <Button Content="Save Layout" Click="Save_Click"/>
            <Button Content="Load Layout" Click="Load_Click"/>

            <CheckBox IsChecked="{Binding FirstPaneIsHidden, Mode=TwoWay}" Content="First pane IsHidden"/>
            <CheckBox IsChecked="{Binding SecondPaneIsHidden, Mode=TwoWay}" Content="Second pane IsHidden"/>
        </StackPanel>

        <telerik:RadDocking x:Name="Dock" Grid.Row="2">
            <telerik:RadSplitContainer telerik:RadDocking.SerializationTag="DefaultContainer" InitialPosition="DockedBottom">
                <telerik:RadPaneGroup x:Name="DefaultGroup" telerik:RadDocking.SerializationTag="DefaultGroup">
                    <telerik:RadPane Title="First" IsHidden="{Binding FirstPaneIsHidden, Mode=TwoWay}" telerik:RadDocking.SerializationTag="FirstPane">
                        This is the FIRST pane.
                    </telerik:RadPane>
                    <telerik:RadPane Title="Second" IsHidden="{Binding SecondPaneIsHidden, Mode=TwoWay}" telerik:RadDocking.SerializationTag="SecondPane">
                        This is the SECOND pane.
                    </telerik:RadPane>
                </telerik:RadPaneGroup>
            </telerik:RadSplitContainer>
        </telerik:RadDocking>
    </Grid>
</UserControl>

Example CS:

using System.ComponentModel;
using System.IO;
using System.Windows;
using System.Windows.Controls;
using Telerik.Windows.Controls;

namespace DockingPersistence
{
    public partial class MainPage : UserControl, INotifyPropertyChanged
    {
        public MainPage()
        {
            InitializeComponent();
            DataContext = this;
        }

        private bool _firstPaneIsHidden;
        public bool FirstPaneIsHidden
        {
            get { return _firstPaneIsHidden; }
            set { _firstPaneIsHidden = value; NotifyPropertyChanged("FirstPaneIsHidden"); }
        }

        private bool _secondPaneIsHidden;
        public bool SecondPaneIsHidden
        {
            get { return _secondPaneIsHidden; }
            set { _secondPaneIsHidden = value; NotifyPropertyChanged("SecondPaneIsHidden"); }
        }

        private void Save_Click(object sender, RoutedEventArgs e)
        {
            SaveFileDialog dialog = new SaveFileDialog();
            if (dialog.ShowDialog() == true)
            {
                using (Stream stream = dialog.OpenFile())
                {
                    Dock.SaveLayout(stream);
                }
            }
        }

        private void Load_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog dialog = new OpenFileDialog();
            if (dialog.ShowDialog() == true)
            {
                using (Stream stream = dialog.File.OpenRead())
                {
                    Dock.LoadLayout(stream);
                }
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged(string property)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(property));
            }
        }
    }
}

[Austin]

The simplest solution I've found is to not provide a serialization tag for the split container...

[Ivo]

Hi Austin,

As shown into this article, SerializationTag has to be applied only to RadPanes and RadPaneGroups, and not to RadSplitContainers. 

Kind regards,
Ivo
the Telerik team