WPF custom control not working as expected in Listview - wpf

Question

I want to put an editabletextblock cutom control in a Listview datatemplate. I'm following this article and it works well.
But when i'm put this control in a Listview datatemplate, on double click on the Textblock, the event OnMouseDoubleClick of the custom control is fired but the Textbox is never display.
My Datatemplate :
<DataTemplate x:Key="ItemTemplate">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="auto" />
</Grid.ColumnDefinitions>
<StackPanel Orientation="Horizontal"
Grid.Column="0">
<Image Source="{Binding Icon}"
Margin="0 0 4 0" />
<localp:EditableTextBlock Text="{Binding Tag, Mode=TwoWay}"
VerticalAlignment="Center" />
</StackPanel>
</Grid>
<ListView
ItemTemplate={StaticResource ItemTemplate}
.... />
And i don't know why the OnMouseDoubleClick EditableTextBlock is fired but the inner Textbox is never displayed as expected.
Thanks is advance for your help,
Regards

Answer 1

Change the default values of TextBlockForegroundColorProperty and TextBoxForegroundColorProperty from null to something else:
public static readonly DependencyProperty TextBlockForegroundColorProperty =
DependencyProperty.Register("TextBlockForegroundColor",
typeof(Brush), typeof(EditableTextBlock), new UIPropertyMetadata(Brushes.Black));
public static readonly DependencyProperty TextBoxForegroundColorProperty =
DependencyProperty.Register("TextBoxForegroundColor",
typeof(Brush), typeof(EditableTextBlock), new UIPropertyMetadata(Brushes.Black));
Or set them in you Xaml:
<local:EditableTextBlock TextBlockForegroundColor="Black" TextBoxForegroundColor="Black" ... />
Edit
you can set keyboard focus to the TextBox, however, you should set e.Handled to true, or the OnTextBoxLostFocus will execute and hides your TextBox.
protected override void OnMouseDoubleClick(MouseButtonEventArgs e)
{
base.OnMouseDoubleClick(e);
this.m_TextBlockDisplayText.Visibility = Visibility.Hidden;
this.m_TextBoxEditText.Visibility = Visibility.Visible;
if (m_TextBoxEditText.IsKeyboardFocusWithin ==false)
{
Keyboard.Focus(m_TextBoxEditText);
e.Handled = true;
m_TextBoxEditText.CaretIndex = m_TextBoxEditText.Text.Length;
}
}