Trait gtk4::prelude::FilterExt

pub trait FilterExt: IsA<Filter> + Sealed + 'static {
    // Provided methods
    fn changed(&self, change: FilterChange) { ... }
    fn strictness(&self) -> FilterMatch { ... }
    fn match_(&self, item: &impl IsA<Object>) -> bool { ... }
    fn connect_changed<F: Fn(&Self, FilterChange) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId { ... }
}

Trait containing all Filter methods.

Implementors

BoolFilter, CustomFilter, FileFilter, Filter, MultiFilter, StringFilter

Provided Methods

fn changed(&self, change: FilterChange)

Notifies all users of the filter that it has changed.

This emits the changed signal. Users of the filter should then check items again via match_().

Depending on the @change parameter, not all items need to be changed, but only some. Refer to the FilterChange documentation for details.

This function is intended for implementers of Filter subclasses and should not be called from other functions.

change

How the filter changed

fn strictness(&self) -> FilterMatch

Gets the known strictness of @filters.

If the strictness is not known, FilterMatch::Some is returned.

This value may change after emission of the changed signal.

This function is meant purely for optimization purposes, filters can choose to omit implementing it, but FilterListModel uses it.

Returns

the strictness of @self

fn match_(&self, item: &impl IsA<Object>) -> bool

fn connect_changed<F: Fn(&Self, FilterChange) + 'static>( &self, f: F ) -> SignalHandlerId

Emitted whenever the filter changed.

Users of the filter should then check items again via match_().

FilterListModel handles this signal automatically.

Depending on the @change parameter, not all items need to be checked, but only some. Refer to the FilterChange documentation for details.

change

how the filter changed

Object Safety

This trait is not object safe.

Implementors

impl<O: IsA<Filter>> FilterExt for O