/// <summary>
/// Formats the text and manages the caret's position.<para/>
/// Starts a recursion if it invoked from the TextChangent event handler.
/// </summary>
private void FormatTextAndManageCaretInRecursion(out Boolean textFormatted)
{
var textBox = this;
var selectionStart = textBox.SelectionStart;
var unformattedValue = textBox.Text ?? String.Empty;
if (IsRecursion())
{
textFormatted = true;
textBox.Text = String.Empty;
textBox.SelectionStart = 0;
return;
}
String formattedText;
Converter.Process(unformattedValue, out formattedText, ref selectionStart);
textFormatted = unformattedValue != formattedText;
if (textFormatted)
{
NumberToMoneyConverter.WriteLogAction(() => String.Format(" = Text = {0}", formattedText));
// It starts the recursion.
textBox.Text = formattedText;
}
NumberToMoneyConverter.WriteLogAction(() => String.Format(" = SelectionStart = {0}", selectionStart));
textBox.SelectionStart = selectionStart;
}
/// <summary>
/// Defines the formatting type <see cref="FormattingAfter"/>.
/// </summary>
/// <param name="state"> </param>
/// <returns>The value of the <see cref="FormattingAfter"/></returns>
private void SetFormattingType(ProcessingState state)
{
FormattingAfter formattingAfter;
if (_textBeforeChangingNotNull.IsNullOrEmpty() &&
state.UnformattedValue.IsNullOrEmpty())
{
formattingAfter = FormattingAfter.EmptyValueBeforeAndNow;
}
else if (_textBeforeChangingNotNull.IsNotNullOrEmpty() &&
state.UnformattedValue.IsNullOrEmpty())
{
formattingAfter = FormattingAfter.EmptyValueBecome;
}
else if (state.UnformattedValue == _textBeforeChangingNotNull)
{
formattingAfter = FormattingAfter.ResettingTheSame;
}
else if (Math.Abs(state.UnformattedValue.Length - _textBeforeChangingNotNull.Length) != 1)
{
formattingAfter = FormattingAfter.GroupPastingOrDeletion;
}
else
{
var subtraction = state.UnformattedValue.Length - _textBeforeChangingNotNull.Length;
formattingAfter = 0 < subtraction
? FormattingAfter.OneSymbolAdded
: FormattingAfter.OneSymbolDeleted;
}
state.FormattingType = formattingAfter;
NumberToMoneyConverter.WriteLogAction(() => String.Format(" !! FormattingType = {0}", formattingAfter));
}
private void textBox_TextChanged(object sender, TextChangedEventArgs e)
{
var textBox = this;
NumberToMoneyConverter.WriteLogAction(() => String.Format("* TextChanged. SelectionStart = {0}. SelectionLength = {1}. Text = {2}",
textBox.SelectionStart,
textBox.SelectionLength,
textBox.Text)
);
ProcessText();
}
void textBox_LostFocus(object sender, RoutedEventArgs e)
{
var textBox = this;
NumberToMoneyConverter.WriteLogAction(() => String.Format("* LostFocus. SelectionStart = {0}. SelectionLength = {1}. Text = {2}",
textBox.SelectionStart,
textBox.SelectionLength,
textBox.Text)
);
SetFocusState(FocusState.No);
ProcessText();
}