use crate::ConstantExpression;
use glib::translate::*;
use glib::{value::FromValue, ToValue};
define_expression!(ConstantExpression, ffi::GtkConstantExpression);
impl ConstantExpression {
#[doc(alias = "gtk_constant_expression_new")]
#[doc(alias = "gtk_constant_expression_new_for_value")]
pub fn new(value: impl Into<glib::Value>) -> Self {
assert_initialized_main_thread!();
unsafe {
from_glib_full(ffi::gtk_constant_expression_new_for_value(
value.into().to_glib_none().0,
))
}
}
#[doc(alias = "gtk_constant_expression_get_value")]
#[doc(alias = "get_value")]
pub fn value_as<V: for<'b> FromValue<'b> + 'static>(&self) -> V {
let value = self.value();
value
.get_owned::<V>()
.expect("Failed to get ConstantExpression value")
}
}
impl std::fmt::Debug for ConstantExpression {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("ConstantExpression")
.field("value_type", &self.value_type())
.field("is_static", &self.is_static())
.field("value", &self.value())
.finish()
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate as gtk4;
#[test]
fn test_expressions() {
let expr1 = ConstantExpression::new(23);
assert_eq!(expr1.value().get::<i32>().unwrap(), 23);
let expr2 = ConstantExpression::for_value(&"hello".to_value());
assert_eq!(expr2.value().get::<String>().unwrap(), "hello");
let expr1 = ConstantExpression::new(23);
assert_eq!(expr1.value().get::<i32>().unwrap(), 23);
assert_eq!(expr1.value_as::<i32>(), 23);
let expr2 = ConstantExpression::for_value(&"hello".to_value());
assert_eq!(expr2.value().get::<String>().unwrap(), "hello");
assert_eq!(expr2.value_as::<String>(), "hello");
assert!(expr1.is::<ConstantExpression>());
}
}