public void InsertText(string text)
{
if (SelectionStart == SelectionEnd)
{
EditableText.Insert(SelectionStart, new Java.Lang.String(text));
}
else
{
EditableText.Replace(SelectionStart, SelectionEnd, new Java.Lang.String(text));
}
}
/// <summary>
/// This method is called when the text is changed, in case any subclasses would like to know.
/// Within text, the lengthAfter characters beginning at start have just replaced old text that
/// had length lengthBefore. It is an error to attempt to make changes to text from this callback.
/// </summary>
/// <param name="text">The text the TextView is displaying</param>
/// <param name="start">The offset of the start of the range of the text that was modified</param>
/// <param name="before">The length of the former text that has been replaced</param>
/// <param name="after">The length of the replacement modified text</param>
protected override void OnTextChanged(Java.Lang.ICharSequence text, int start, int before, int after)
{
base.OnTextChanged(text, start, before, after);
if (Text != _currentValue && !(_expression == null || _expression.IsMatch(Text)))
{
EditableText.Replace(0, Text.Length, _currentValue ?? string.Empty);
}
if (Text == _currentValue)
{
return;
}
var old = _currentValue;
_currentValue = Text;
this.OnPropertyChanged(nameof(Text));
this.OnPropertyChanged(nameof(StringValue));
OnTextChanged(old, _currentValue);
}