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use druid::text::{Formatter, Validation, ValidationError};
pub struct U16Formatter;
impl Formatter<u16> for U16Formatter {
fn format(&self, value: &u16) -> String {
value.to_string()
}
fn validate_partial_input(&self, input: &str, _sel: &druid::text::Selection) -> Validation {
if input.is_empty() {
return Validation::success();
}
if input.len() > 6 {
return Validation::failure(U16ValidationError::WrongNumberOfCharacters);
}
match input.parse::<u16>() {
Ok(_) => Validation::success(),
Err(err) => Validation::failure(err),
}
}
fn value(&self, input: &str) -> Result<u16, ValidationError> {
if input.is_empty() || input.len() > 5 {
return Err(ValidationError::new(
U16ValidationError::WrongNumberOfCharacters,
));
}
input.parse().map_err(|err| ValidationError::new(err))
}
}
#[derive(Debug, Clone)]
pub enum U16ValidationError {
WrongNumberOfCharacters,
}
impl std::fmt::Display for U16ValidationError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
// TODO set correct display based on actual value
write!(f, "U16ValidationError::WrongNumberOfCharacters")
}
}
impl std::error::Error for U16ValidationError {}
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