private void RemoveText(int position, int length)
{
if (length == 0)
{
return;
}
MaskProvider.RemoveAt(position, position + length - 1);
}
//gets the next position in the textbox to move
private int GetNextCharacterPosition(int startPosition)
{
int position = MaskProvider.FindEditPositionFrom(startPosition, true);
if (position == -1)
{
return(startPosition);
}
return(position);
}
private bool RemoveSelectedText()
{
int length = SelectionLength;
if (length == 0)
{
return(false);
}
int position = SelectionStart;
return(MaskProvider.RemoveAt(position, position + length - 1));
}
//gets the next position in the textbox to move
private int GetPreivousCharacterPosition(int startPosition)
{
int position = -1;
for (int i = startPosition - 1; i >= 0; i--)
{
position = MaskProvider.FindEditPositionFrom(i, true);
if (position < startPosition && position != -1)
{
return(position);
}
}
return(startPosition);
}
private void DecreaseMask(int position, int length)
{
var decPos = GetDecimalSeparatorPosition(Mask);
var str = MaskProvider.ToDisplayString();
if (position > decPos)
{
Text = str.Remove(position, length).Insert(position, 0.ToString("D" + length));
CaretIndex = position;
return;
}
if (position + length > decPos)
{
var decLength = position + length - decPos - 1;
var decPosition = decPos + 1;
str = str.Remove(decPosition, decLength).Insert(decPosition, 0.ToString("D" + decLength));
length = decPos - position;
}
if (length > 0)
{
str = str.Remove(position, length).Replace(" ", string.Empty);
if (str.Length == 0)
{
str = PromptChar.ToString();
}
var mask = FormatMask(Mask.Remove(position, length));
if (mask.Length == 0 || mask.StartsWith("."))
{
if (mask.StartsWith("."))
{
str = PromptChar + str;
}
mask = PromptChar + mask;
}
Mask = mask;
Text = str;
}
CaretIndex = position;
}
private object ConvertTextToValue(string text)
{
object convertedValue = null;
Type dataType = ValueType;
string valueToConvert = MaskProvider.ToString().Trim();
try
{
if (valueToConvert.GetType() == dataType || dataType.IsInstanceOfType(valueToConvert))
{
convertedValue = valueToConvert;
}
//#if VS2008
// else if( String.IsNullOrWhiteSpace( valueToConvert ) )
// {
// convertedValue = Activator.CreateInstance( dataType );
// }
//#else
// else if ( String.IsNullOrEmpty( valueToConvert ) )
// {
// convertedValue = Activator.CreateInstance( dataType );
// }
//#endif
else if (String.IsNullOrEmpty(valueToConvert))
{
convertedValue = Activator.CreateInstance(dataType);
}
else if (null == convertedValue && valueToConvert is IConvertible)
{
convertedValue = Convert.ChangeType(valueToConvert, dataType);
}
}
catch
{
//if an excpetion occurs revert back to original value
_convertExceptionOccurred = true;
return(Value);
}
return(convertedValue);
}
private string ConvertValueToText(object value)
{
if (value == null)
{
value = string.Empty;
}
if (_convertExceptionOccurred)
{
value = Value;
_convertExceptionOccurred = false;
}
//I have only seen this occur while in Blend, but we need it here so the Blend designer doesn't crash.
if (MaskProvider == null)
{
return(value.ToString());
}
MaskProvider.Set(value.ToString());
return(MaskProvider.ToDisplayString());
}
private void Paste(object sender, RoutedEventArgs e)
{
if (IsReadOnly)
{
return;
}
object data = Clipboard.GetData(DataFormats.Text);
if (data != null)
{
string text = data.ToString().Trim();
if (text.Length > 0)
{
int position = SelectionStart;
MaskProvider.Set(text);
UpdateText(position);
}
}
}
