Trait SlotViews
pub trait SlotViews {
// Required methods
fn len(&self) -> usize;
fn view_mut(&mut self, index: usize) -> Option<&mut Box<dyn Widget>>;
fn insert(&mut self, index: usize, view: Box<dyn Widget>);
fn remove(&mut self, index: usize);
fn move_view(&mut self, from: usize, to: usize);
fn replace(&mut self, index: usize, view: Box<dyn Widget>);
// Provided method
fn is_empty(&self) -> bool { ... }
}Expand description
The views in one slot of a widget, which a host inserts, removes, moves and replaces by
key: a change of a slot’s content costs what changed, and is described to the window
(crate::widget::StructureChange::Described) rather than rebuilding the widget.
Required Methods§
fn view_mut(&mut self, index: usize) -> Option<&mut Box<dyn Widget>>
fn insert(&mut self, index: usize, view: Box<dyn Widget>)
fn remove(&mut self, index: usize)
fn move_view(&mut self, from: usize, to: usize)
fn replace(&mut self, index: usize, view: Box<dyn Widget>)
Provided Methods§
Implementors§
impl SlotViews for Row
The row’s children are its slot: a component that holds a row takes the views it is given where they stand, and the row lays them out again.
impl SlotViews for Scrollable
The content of the scroll: one view, or none.
impl SlotViews for Section
The items under a section’s header.
impl SlotViews for ChromeBody
The body the chrome holds: one view, which changes where it stands.
impl SlotViews for DeclaredPanel
The view of the header or footer being changed: one, or none.
impl SlotViews for Docked
The view of the slot being changed: the content, or the foot.
impl SlotViews for DragRun
The view of the item a host is changing, where the item stands: the view in the slot its run gave it, so a part of the bar changes what it shows without the bar being built again.
impl SlotViews for Map
The pins of a map: one view each. Once the map is built the widgets live in its region, so a
change here reaches the region’s children; before that, in the map’s own store. Either way
the pins’ keys and places stay in self.pins, which the next layout lays out afresh.
impl SlotViews for PageSlide
The page, the slot’s one view, which changes where it stands.
impl SlotViews for WindowFrame
The view of the slot being changed: the controls, the tabs, or the content.