/// <summary>
/// Handles a change in the text. Updates the bindings with Length and Units.
/// </summary>
/// <param name="eventArgs">The event arguments</param>
protected override void OnTextChanged(TextChangedEventArgs eventArgs)
{
string[] valueAndUnits = this.Text.Split(new char[] { ' ' }, StringSplitOptions.None);
// BindingExpression binding;
base.OnTextChanged(eventArgs);
#if false
binding = this.GetBindingExpression(TermLength.LengthProperty);
if (binding != null)
{
binding.UpdateTarget();
}
binding = this.GetBindingExpression(TermLength.UnitsProperty);
if (binding != null)
{
binding.UpdateTarget();
}
if (this.SelectionStart == this.Text.Length && this.Units == null && valueAndUnits.Length > 1 && valueAndUnits[1] != "" && !eventArgs.Changes.Any(c => c.RemovedLength > 0))
{
string rest = TermLength.CompleteUnit(valueAndUnits[1]);
this.SelectionLength = rest.Length;
this.Text += rest;
}
#endif
}
/// <summary>
/// Handle the LostFocus event. If necessary, swap in the last valid value.
/// </summary>
/// <param name="eventArgs">The event arguments.</param>
protected override void OnLostKeyboardFocus(KeyboardFocusChangedEventArgs eventArgs)
{
// When the user is done editing, making sure we have valid values for Length and Units.
if (!this.IsReadOnly)
{
string[] valueAndUnits = this.Text.Split(new char[] { ' ' });
if (valueAndUnits.Length > 1)
{
string unitText = TermLength.CompleteUnit(valueAndUnits[1]);
if (!String.IsNullOrEmpty(unitText))
{
try
{
this.Units = TimeUnitList.Default.Find((TimeUnit)Enum.Parse(typeof(TimeUnit), unitText, true)).TimeUnitId;
}
catch
{
this.Units = null;
}
}
}
if (Regex.Match(valueAndUnits[0], @"^[-+]?\d*\.?\d").Success)
{
Boolean parsed = false;
Decimal parsedValue = 0m;
parsed = Decimal.TryParse(valueAndUnits[0], out parsedValue);
this.Length = parsed ? (Decimal?)Math.Abs(parsedValue) : null;
}
if (this.Length == null)
{
this.Length = this.lastValue;
}
if (this.Units == null)
{
this.Units = TimeUnitList.Default.Find(this.lastUnits).TimeUnitId;
}
this.Text = String.Format("{0:0.###} {1}", this.Length, this.Units == null ? "" : (Object)(TimeUnitList.Default.Find(this.Units.Value).TimeUnitCode));
}
base.OnLostKeyboardFocus(eventArgs);
}