Problem with autoselecting text on getting focus

For our application, the desired behavior is when a text box is
getting a focus, all text within that text box is automatically
selected, so user can just start typing, saving keystrokes. I couldn't
find a property that controls this behavior, so I just attached an
event to the text box:

edPrice.GotFocus += delegate(object sender, RoutedEventArgs e)
{
edPrice.SelectAll();
};
Unfortunately, this works only if the focus is received through
keyboard navigation, if a text box is selected with a mouse, the
selection disappears as soon as mouse button is released. Handling the
PreviewMouseLeftButtonUp (setting event argument's Handled to true)
helped, but completely broke mouse navigation. Re-selecting the text
in MouseLeftButtonUp also got me nowhere.

Any suggestions?

Hi,

You could try something like the following, it's simple, but has
problem when losing the focus with the mouse. The next item will
require two mouse clicks instead of one to get the focus out of the
MyTextBox instance.

class MyTextBox: TextBox
{
bool isGettingFocus;

protected override void
OnPreviewMouseUp(System.Windows.Input.MouseButtonEventArgs e)
{
if (isGettingFocus)
{
isGettingFocus = false;
e.Handled = true;
}
else
base.OnPreviewMouseUp(e);
}

protected override void
OnGotKeyboardFocus(System.Windows.Input.KeyboardFocusChangedEventArgs
e)
{
base.OnGotKeyboardFocus(e);
this.SelectAll();
}

protected override void
OnPreviewGotKeyboardFocus(System.Windows.Input.KeyboardFocusChangedEventArgs
e)
{
base.OnPreviewGotKeyboardFocus(e);
isGettingFocus = true;
}
}

Luc