protected override void OnParsing(
ParseEventArgs e)
{
if (SuppressTextInput)
{
// this is readonly control like ImageEdit, BackgroundEdit, text
// of such control can not be changed by the user
// so parsing is not needed
e.Value = null;
e.Succeeded = false;
}
else
{
var ttva = new TextToValueArgs(e.Text);
if (TextToValue(ttva))
{
e.Value = ttva.Value;
e.Succeeded = true;
}
else
{
e.Succeeded = false;
e.ParseInfo.ErrorMessage = ttva.ErrorMessage;
}
}
base.OnParsing(e);
}
protected override bool TextToValue(
TextToValueArgs e)
{
if (string.IsNullOrEmpty(e.Text))
{
e.Value = Color.Transparent;
return(true);
}
Color color;
if (!Utils.TryParseColorFromDisplayText(e.Text, _emptyColorCaption, out color))
{
return(false);
}
if (color == Color.Transparent && !AllowTransparent)
{
return(false);
}
if (color.IsEmpty && !AllowEmpty)
{
return(false);
}
e.Value = color;
return(true);
}
protected override bool TextToValue(
TextToValueArgs e)
{
if (string.IsNullOrEmpty(e.Text))
{
return(false);
}
string s = e.Text;
if (!string.IsNullOrEmpty(_format))
{
foreach (char c in _format.Replace("{0}", string.Empty))
{
s = s.Replace(new string(c, 1), string.Empty);
}
}
decimal v;
if (!decimal.TryParse(s, out v))
{
if (!decimal.TryParse(s, NumberStyles.Any, CultureInfo.InvariantCulture, out v))
{
return(false);
}
}
//
if (_minValue.HasValue && v < _minValue.Value)
{
e.Value = ToDataTypeValue(_minValue.Value);
}
else if (_maxValue.HasValue && v > _maxValue.Value)
{
e.Value = ToDataTypeValue(_maxValue.Value);
}
else
{
e.Value = ToDataTypeValue(ToActualValue(v));
}
return(true);
}
protected override bool TextToValue(TextToValueArgs e)
{
if (string.IsNullOrEmpty(e.Text))
{
return(false);
}
try
{
object v = Enum.Parse(_enumType, e.Text);
if (IndexOfValue(v) == -1)
{
return(false);
}
e.Value = v;
return(true);
}
catch
{
return(false);
}
}
/// <summary>
/// Should be overridden in deviced class and convert string to value.
/// </summary>
/// <param name="e"></param>
/// <returns></returns>
protected virtual bool TextToValue(
TextToValueArgs e)
{
throw new Exception("TextToValue() should be overridden in derived class.");
}
