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// Take a look at the license at the top of the repository in the LICENSE file.

use crate::{Expression, NumericSorter};
use glib::translate::*;

impl NumericSorter {
    /// Creates a new numeric sorter using the given `expression`.
    ///
    /// Smaller numbers will be sorted first. You can call
    /// [``set_sort_order()``][`Self::set_sort_order()`] to change this.
    /// ## `expression`
    /// The expression to evaluate
    ///
    /// # Returns
    ///
    /// a new [`NumericSorter`][crate::NumericSorter]
    #[doc(alias = "gtk_numeric_sorter_new")]
    pub fn new<E: AsRef<Expression>>(expression: Option<&E>) -> Self {
        assert_initialized_main_thread!();
        unsafe {
            from_glib_full(ffi::gtk_numeric_sorter_new(
                expression.map(|e| e.as_ref()).to_glib_full(),
            ))
        }
    }

    /// Sets the expression that is evaluated to obtain numbers from items.
    ///
    /// Unless an expression is set on `self`, the sorter will always
    /// compare items as invalid.
    ///
    /// The expression must have a return type that can be compared
    /// numerically, such as `G_TYPE_INT` or `G_TYPE_DOUBLE`.
    /// ## `expression`
    /// a [`Expression`][crate::Expression]
    #[doc(alias = "gtk_numeric_sorter_set_expression")]
    pub fn set_expression<E: AsRef<Expression>>(&self, expression: Option<&E>) {
        unsafe {
            ffi::gtk_numeric_sorter_set_expression(
                self.to_glib_none().0,
                expression.map(|e| e.as_ref()).to_glib_none().0,
            );
        }
    }
}