Geek
Cool Guy

internal Control TextBox
{
set
{
control = ControlUnderAutoComplete.Create(value);
Style s = (Style)this[control.StyleKey];
viewSource = control.GetViewSource(s);
viewSource.Filter += CollectionViewSource_Filter;
value.SetValue(Control.StyleProperty, this[control.StyleKey]);
value.ApplyTemplate();
autoCompletePopup = (Popup) value.Template.FindName(”autoCompletePopup”, value);
listBox = (ListBox) value.Template.FindName(”autoCompleteListBox”, value);
value.AddHandler(System.Windows.Controls.TextBox.TextChangedEvent, new TextChangedEventHandler(textBox1_TextChanged));
value.LostFocus += textBox1_LostFocus;
value.PreviewKeyUp += textBox1_PreviewKeyUp;

//ADD THIS LINE FOR SELECTING AN OPTION FROM MOUSE
value.PreviewMouseDown += new MouseButtonEventHandler(value_PreviewMouseDown);

}
}

void value_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
TextBlock tb = e.OriginalSource as TextBlock;
if (tb != null)
{
((TextBox )sender).Text = tb.Text;
e.Handled = true;
}
}
}

Thanks!!!

Just remember to *remove* the StartupUri in Application element at app.xaml.

I was in a hurry and missed that. (Looking only the source code)

public class MyApp : Application
{
protected override void OnStartUp(object sender, StartUpEventArgs e)
{
MainWindow window = new MainWindow();
MyConfigDialog dialog = new MyConfigDialog();
dialog.ShowDialog();

// Problem: The application doesn’t close when mainwindow is closed.
// window.Show(); // If you uncomment this it shows *two* main windowes. But same problem, application never closes.
}
}

Instead of using += to set event handlers you should use the DependencyPropertyDescriptor method that Brian used for the Visibility issue. Internally the WPF Dependency system uses weak refrences for event handlers thus the memory leak issue is avoided. I will post example code showing my solution derived from yours. Thanks for the good work!