public static bool IsStringNumeric(string value, NumericProperties np)
{
bool ok = true;
int len = value.Length, i = 0, dp = -1;
if (np.AllowSign && value.StartsWith(NumberFormatInfo.CurrentInfo.NegativeSign))
{
i++;
}
for (; i < len; i++)
{
if (np.AllowDP && dp == -1 && value[i] == '.')
{
dp = i;
}
else
{
ok &= char.IsDigit(value[i]);
}
}
if (ok && dp >= 0)
{
ok = len - dp - 1 <= np.Precision;
}
return(ok && len <= np.Length);
}
public static void OnFormatChanged(DependencyObject d, NumericProperties np, string format)
{
np.Parse(format);
Size size = UIUtils.MeasureText("".PadRight(np.Length, '9'), (Control)d);
((Control)d).Width = size.Width + (d is NumericTextBox ? 12 : 20);
//((NumericTextBox)sender).Width = TextRenderer.MeasureText("".PadRight(Length, '9'), ((NumericTextBox)sender).Font);
}
protected override void OnPreviewTextInput(TextCompositionEventArgs e)
{
TextBox textBox = (TextBox)e.OriginalSource;
string text = textBox.SelectionLength > 0 ? textBox.Text.Remove(textBox.SelectionStart, textBox.SelectionLength) : textBox.Text;
text = text.Insert(textBox.CaretIndex, e.Text);
e.Handled = !NumericProperties.IsStringNumeric(text, np);
base.OnPreviewTextInput(e);
}
protected override void OnPreviewTextInput(TextCompositionEventArgs e)
{
TextBox textBox = (TextBox)e.OriginalSource;
string text = textBox.SelectionLength > 0 ? textBox.Text.Remove(textBox.SelectionStart, textBox.SelectionLength) : textBox.Text;
text = text.Insert(textBox.CaretIndex, e.Text);
if (!(e.Handled = !NumericProperties.IsStringNumeric(text, np)))
{
updateText = false;
Value = double.Parse(text == "" || text == "." || text == "-" || text == "-." ? "0" : text, np.Styles, CultureInfo.InvariantCulture);
updateText = true;
}
base.OnPreviewTextInput(e);
}
private static void OnFormatChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
NumericProperties.OnFormatChanged(d, ((NumericComboBox)d).np, (string)e.NewValue);
}
