private void TextBox_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
var textBox = (TextBox)sender;
var rounder = new LayoutRounder(textBox);
// 自コントロール上であれば、終了させない
var pos = e.GetPosition(textBox);
var rect = rounder.RoundRenderRectangle(false);
if (rect.Contains(pos))
{
return;
}
var parent = textBox.GetParent <BiaEditableTextBlock>();
Debug.Assert(parent != null);
FinishEditing(parent, textBox);
}
