Ejemplo n.º 1
0
        private void OnTextBoxKeyDown(object sender, KeyEventArgs e)
        {
            _manualChange = _manualChange || e.Key == Key.Back || e.Key == Key.Delete || e.Key == Key.Decimal || e.Key == Key.OemComma || e.Key == Key.OemPeriod;

            if (NumericInputMode.HasFlag(NumericInput.Decimal) && (e.Key == Key.Decimal || e.Key == Key.OemPeriod))
            {
                TextBox textBox = sender as TextBox;

                if (textBox.Text.Contains(this.SpecificCultureInfo.NumberFormat.NumberDecimalSeparator) == false)
                {
                    //the control doesn't contai the decimal separator
                    //so we get the current caret index to insert the current culture decimal separator
                    var caret = textBox.CaretIndex;
                    //update the control text
                    textBox.Text = textBox.Text.Insert(caret, this.SpecificCultureInfo.NumberFormat.CurrencyDecimalSeparator);
                    //move the caret to the correct position
                    textBox.CaretIndex = caret + 1;
                }
                e.Handled = true;
            }
        }
Ejemplo n.º 2
0
        protected void OnPreviewTextInput(object sender, TextCompositionEventArgs e)
        {
            e.Handled = true;
            if (string.IsNullOrWhiteSpace(e.Text) || e.Text.Length != 1)
            {
                return;
            }

            TextBox          textBox           = (TextBox)sender;
            CultureInfo      equivalentCulture = SpecificCultureInfo;
            NumberFormatInfo numberFormatInfo  = equivalentCulture.NumberFormat;

            string text = e.Text;

            if (char.IsDigit(text[0]))
            {
                if (textBox.Text.IndexOf(numberFormatInfo.NegativeSign, textBox.SelectionStart + textBox.SelectionLength, StrComp) < 0 &&
                    textBox.Text.IndexOf(numberFormatInfo.PositiveSign, textBox.SelectionStart + textBox.SelectionLength, StrComp) < 0)
                {
                    e.Handled = false;
                }
            }
            else
            {
                bool allTextSelected = textBox.SelectedText == textBox.Text;

                if (numberFormatInfo.NumberDecimalSeparator == text)
                {
                    if (textBox.Text.All(i => i.ToString(equivalentCulture) != numberFormatInfo.NumberDecimalSeparator) || allTextSelected)
                    {
                        if (NumericInputMode.HasFlag(NumericInput.Decimal))
                        {
                            e.Handled = false;
                        }
                    }
                }
                else
                {
                    if (numberFormatInfo.NegativeSign == text ||
                        text == numberFormatInfo.PositiveSign)
                    {
                        if (textBox.SelectionStart == 0)
                        {
                            // check if text already has a + or - sign
                            if (textBox.Text.Length > 1)
                            {
                                if (allTextSelected ||
                                    (!textBox.Text.StartsWith(numberFormatInfo.NegativeSign, StrComp) &&
                                     !textBox.Text.StartsWith(numberFormatInfo.PositiveSign, StrComp)))
                                {
                                    e.Handled = false;
                                }
                            }
                            else
                            {
                                e.Handled = false;
                            }
                        }
                        else if (textBox.SelectionStart > 0)
                        {
                            string elementBeforeCaret = textBox.Text.ElementAt(textBox.SelectionStart - 1).ToString(equivalentCulture);
                            if (elementBeforeCaret.Equals(ScientificNotationChar, StrComp) && NumericInputMode.HasFlag(NumericInput.Decimal))
                            {
                                e.Handled = false;
                            }
                        }
                    }
                    else if (text.Equals(ScientificNotationChar, StrComp) &&
                             NumericInputMode.HasFlag(NumericInput.Decimal) &&
                             textBox.SelectionStart > 0 &&
                             !textBox.Text.Any(i => i.ToString(equivalentCulture).Equals(ScientificNotationChar, StrComp)))
                    {
                        e.Handled = false;
                    }
                }
            }

            this._manualChange = this._manualChange || !e.Handled;
        }