Here is what happens:
I have a listbox with items. Listbox has focus. Some item (say, 5th) is selected (has a blue background), but has no 'border'.
When I press '
Down' key, the focus moves from ListBox to the first ListBoxItem.
(What I want is to make 6th item selected, regardless of the 'border')
When I navigate using 'Tab', the Listbox never receives the focus again.
But when the collection is emptied and filled again, ListBox itself gets focus, pressing '
Down' moves the focus to the item.
How to prevent ListBox from gaining focus?
P.S.
listBox1.SelectedItem is my own class, I don't know how to make ListBoxItem out of it to .Focus() it.
EDIT: the code
Xaml:
<UserControl.Resources>
<me:BooleanToVisibilityConverter x:Key="visibilityConverter"/>
<me:BooleanToItalicsConverter x:Key="italicsConverter"/>
</UserControl.Resources>
<ListBox x:Name="lbItems">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<ProgressBar HorizontalAlignment="Stretch"
VerticalAlignment="Bottom"
Visibility="{Binding Path=ShowProgress, Converter={StaticResource visibilityConverter}}"
Maximum="1"
Margin="4,0,0,0"
Value="{Binding Progress}"
/>
<TextBlock Text="{Binding Path=VisualName}"
FontStyle="{Binding Path=IsFinished, Converter={StaticResource italicsConverter}}"
Margin="4"
/>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
<me:OuterItem Name="Regular Folder" IsFinished="True" Exists="True" IsFolder="True"/>
<me:OuterItem Name="Regular Item" IsFinished="True" Exists="True"/>
<me:OuterItem Name="Yet to be created" IsFinished="False" Exists="False"/>
<me:OuterItem Name="Just created" IsFinished="False" Exists="True"/>
<me:OuterItem Name="In progress" IsFinished="False" Exists="True" Progress="0.7"/>
</ListBox>
where OuterItem is:
public class OuterItem : IOuterItem
{
public Guid Id { get; set; }
public string Name { get; set; }
public bool IsFolder { get; set; }
public bool IsFinished { get; set; }
public bool Exists { get; set; }
public double Progress { get; set; }
/// Code below is of lesser importance, but anyway
///
#region Visualization helper properties
public bool ShowProgress
{
get
{
return !IsFinished && Exists;
}
}
public string VisualName
{
get
{
return IsFolder ? "[ " + Name + " ]" : Name;
}
}
#endregion
public override string ToString()
{
if (IsFinished)
return Name;
if (!Exists)
return " ??? " + Name;
return Progress.ToString("0.000 ") + Name;
}
public static OuterItem Get(IOuterItem item)
{
return new OuterItem()
{
Id = item.Id,
Name = item.Name,
IsFolder = item.IsFolder,
IsFinished = item.IsFinished,
Exists = item.Exists,
Progress = item.Progress
};
}
}
?onverters are:
/// Are of lesser importance too (for understanding), but will be useful if you copy-paste to get it working
public class BooleanToItalicsConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
bool normal = (bool)value;
return normal ? FontStyles.Normal : FontStyles.Italic;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
public class BooleanToVisibilityConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
bool exists = (bool)value;
return exists ? Visibility.Visible : Visibility.Collapsed;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
But most important, is that UserControl.Loaded() has:
lbItems.Items.Clear();
lbItems.ItemsSource = fsItems;
where fsItems is ObservableCollection<OuterItem>.
The usability problem I describe takes place when I Clear() that collection (fsItems) and fill with new items.
