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// Take a look at the license at the top of the repository in the LICENSE file.
use crate::{ClosureExpression, Expression};
use glib::{translate::*, value::ValueType, StaticType, Value};
define_expression!(ClosureExpression, ffi::GtkClosureExpression);
impl ClosureExpression {
/// Creates a [`Expression`][crate::Expression] that calls `closure` when it is evaluated.
///
/// `closure` is called with the `this` object and the results of evaluating
/// the `params` expressions.
/// ## `value_type`
/// the type of the value that this expression evaluates to
/// ## `closure`
/// closure to call when evaluating this expression. If closure is floating, it is adopted
/// ## `params`
/// expressions for each parameter
///
/// # Returns
///
/// a new [`Expression`][crate::Expression]
#[doc(alias = "gtk_closure_expression_new")]
pub fn new<R>(
params: impl IntoIterator<Item = impl AsRef<Expression>>,
closure: glib::RustClosure,
) -> Self
where
R: ValueType,
{
assert_initialized_main_thread!();
let params = params
.into_iter()
.map(|e| e.as_ref().clone())
.collect::<Vec<_>>();
unsafe {
from_glib_full(ffi::gtk_closure_expression_new(
R::Type::static_type().into_glib(),
closure.as_ref().to_glib_none().0,
params.len() as u32,
params.to_glib_full(),
))
}
}
#[doc(alias = "gtk_closure_expression_new")]
pub fn with_callback<R, F>(
params: impl IntoIterator<Item = impl AsRef<Expression>>,
callback: F,
) -> Self
where
F: Fn(&[Value]) -> R + 'static,
R: ValueType,
{
assert_initialized_main_thread!();
let closure = glib::Closure::new_local(move |values| {
let ret = callback(values);
Some(ret.to_value())
});
let params = params
.into_iter()
.map(|e| e.as_ref().clone())
.collect::<Vec<_>>();
unsafe {
from_glib_full(ffi::gtk_closure_expression_new(
R::Type::static_type().into_glib(),
closure.to_glib_none().0,
params.len() as u32,
params.to_glib_full(),
))
}
}
}