Trait ListModifiers 

pub trait ListModifiers: Sized {
    // Required methods
    fn selection<R>(self, selection: impl Res<R> + 'static) -> Self
       where R: Deref<Target = [usize]> + Clone + 'static;
    fn focused_index(self, focused: impl Res<Option<usize>> + 'static) -> Self;
    fn on_select<F>(self, callback: F) -> Self
       where F: 'static + Fn(&mut EventContext<'_>, usize);
    fn on_focus<F>(self, callback: F) -> Self
       where F: 'static + Fn(&mut EventContext<'_>, usize);
    fn selectable<U: Into<Selectable> + Clone + 'static>(
        self,
        selectable: impl Res<U> + 'static,
    ) -> Self;
    fn min_selected(self, min_selected: impl Res<usize> + 'static) -> Self;
    fn max_selected(self, max_selected: impl Res<usize> + 'static) -> Self;
    fn selection_follows_focus<U: Into<bool> + Clone + 'static>(
        self,
        flag: impl Res<U> + 'static,
    ) -> Self;
    fn space_selects_focused<U: Into<bool> + Clone + 'static>(
        self,
        flag: impl Res<U> + 'static,
    ) -> Self;
    fn horizontal<U: Into<bool> + Clone + 'static>(
        self,
        horizontal: impl Res<U> + 'static,
    ) -> Self;
    fn scroll_to_cursor(self, flag: bool) -> Self;
    fn focus_first_item_on_focus_in(
        self,
        flag: impl Res<bool> + 'static,
    ) -> Self;
    fn on_scroll(
        self,
        callback: impl Fn(&mut EventContext<'_>, f32, f32) + 'static + Send + Sync,
    ) -> Self;
    fn scroll_x(self, scrollx: impl Res<f32> + 'static) -> Self;
    fn scroll_y(self, scrolly: impl Res<f32> + 'static) -> Self;
    fn show_horizontal_scrollbar(self, flag: impl Res<bool> + 'static) -> Self;
    fn show_vertical_scrollbar(self, flag: impl Res<bool> + 'static) -> Self;
    fn type_ahead_text<F>(self, callback: F) -> Self
       where F: 'static + Fn(&mut EventContext<'_>, usize) -> Option<String>;
}

Modifiers for changing the behavior and selection state of a List.

Required Methods

fn selection<R>(self, selection: impl Res<R> + 'static) -> Self

where R: Deref<Target = [usize]> + Clone + 'static,

Sets the selected items of the list from signal of type indices.

fn focused_index(self, focused: impl Res<Option<usize>> + 'static) -> Self

Sets the focused item of the list from a signal of an optional index.

fn on_select<F>(self, callback: F) -> Self

where F: 'static + Fn(&mut EventContext<'_>, usize),

Sets the callback triggered when a ListItem is selected.

fn on_focus<F>(self, callback: F) -> Self

where F: 'static + Fn(&mut EventContext<'_>, usize),

Sets the callback triggered when a ListItem receives focus.

fn selectable<U: Into<Selectable> + Clone + 'static>( self, selectable: impl Res<U> + 'static, ) -> Self

Set the selectable state of the List.

fn min_selected(self, min_selected: impl Res<usize> + 'static) -> Self

Sets the minimum number of selected items.

fn max_selected(self, max_selected: impl Res<usize> + 'static) -> Self

Sets the maximum number of selected items.

fn selection_follows_focus<U: Into<bool> + Clone + 'static>( self, flag: impl Res<U> + 'static, ) -> Self

Sets whether the selection should follow the focus.

fn space_selects_focused<U: Into<bool> + Clone + 'static>( self, flag: impl Res<U> + 'static, ) -> Self

Sets whether pressing Space should select the currently focused item.

fn horizontal<U: Into<bool> + Clone + 'static>( self, horizontal: impl Res<U> + 'static, ) -> Self

Sets the orientation of the list.

fn scroll_to_cursor(self, flag: bool) -> Self

Sets whether the scrollbar should move to the cursor when pressed.

fn focus_first_item_on_focus_in(self, flag: impl Res<bool> + 'static) -> Self

Sets whether the first item should be focused when the list gains focus with no selection.

fn on_scroll( self, callback: impl Fn(&mut EventContext<'_>, f32, f32) + 'static + Send + Sync, ) -> Self

Sets a callback which will be called when a scrollview is scrolled, either with the mouse wheel, touchpad, or using the scroll bars.

fn scroll_x(self, scrollx: impl Res<f32> + 'static) -> Self

Set the horizontal scroll position of the ScrollView. Accepts a value or signal of type an f32 between 0 and 1.

fn scroll_y(self, scrolly: impl Res<f32> + 'static) -> Self

Set the vertical scroll position of the ScrollView. Accepts a value or signal of type an f32 between 0 and 1.

fn show_horizontal_scrollbar(self, flag: impl Res<bool> + 'static) -> Self

Sets whether the horizontal scrollbar should be visible.

fn show_vertical_scrollbar(self, flag: impl Res<bool> + 'static) -> Self

Sets whether the vertical scrollbar should be visible.

fn type_ahead_text<F>(self, callback: F) -> Self

where F: 'static + Fn(&mut EventContext<'_>, usize) -> Option<String>,

Enables type-ahead navigation by providing searchable text per item index.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl ListModifiers for Handle<'_, List>