ScrollArea

pub fn new(root_id: impl Into<ElementId>) -> Self

pub const fn keep_mounted(mut self, keep_mounted: bool) -> Self

pub const fn is_keep_mounted(self) -> bool

pub const fn root_id(self) -> ElementId

pub fn viewport_id(self) -> ElementId

pub fn content_id(self) -> ElementId

pub fn scrollbar_id(self, orientation: ScrollAreaOrientation) -> ElementId

pub fn thumb_id(self, orientation: ScrollAreaOrientation) -> ElementId

pub fn corner_id(self) -> ElementId

pub fn shows_scrollbar( self, state: &ScrollAreaState, orientation: ScrollAreaOrientation, ) -> bool

pub fn shows_corner(self, state: &ScrollAreaState) -> bool

pub fn root_with(self, root: Element) -> Element

Decorate an application-owned root without adding layout or appearance.

pub fn root(self) -> Element

Create the unstyled root part. Use [`Self::root_with`] to supply an existing element.

pub fn viewport_with(self, viewport: Element) -> Element

Decorate the application-owned scroll container. The viewport clips its content on both axes and carries the ScrollView role. The caller places the content by translating [`Self::content_with`] with the retained offset, which keeps scrolling paint-only and keeps QuickGUI's built-in overlay scrollbar out of a component whose scrollbars the application draws itself.

pub fn viewport(self) -> Element

Create the unstyled viewport part. Use [`Self::viewport_with`] to supply an existing element.

pub fn content_with(self, content: Element) -> Element

Decorate the application-owned scrolled content. Translate it by the negated [`ScrollAreaState::offset`]; QuickGUI adds no transform of its own so the application keeps full control of the motion.

pub fn content(self) -> Element

Create the unstyled content part. Use [`Self::content_with`] to supply an existing element.

pub fn scrollbar_with( self, state: &ScrollAreaState, orientation: ScrollAreaOrientation, scrollbar: Element, ) -> Element

Decorate one application-owned scrollbar track. The track projects the ScrollBar role with the exact current position, the scrollable range, and its orientation. It is not focusable: a scrollbar duplicates keyboard scrolling the viewport already provides, so it stays out of the Tab sequence.

pub fn scrollbar(self, state: &ScrollAreaState, orientation: ScrollAreaOrientation) -> Element

Create the unstyled scrollbar part. Use [`Self::scrollbar_with`] to supply an existing element.

pub fn thumb_with(self, orientation: ScrollAreaOrientation, thumb: Element) -> Element

Decorate one application-owned scrollbar thumb. The thumb carries the captured pointer drag. Attach a [`crate::ViewContext::pointer_listener`] registered for [`Self::thumb_id`] and forward the event to [`ScrollAreaState::apply_thumb_pointer`] with the track length the caller laid out.

pub fn thumb(self, orientation: ScrollAreaOrientation) -> Element

Create the unstyled thumb part. Use [`Self::thumb_with`] to supply an existing element.

pub fn positioned_thumb_with( self, state: &ScrollAreaState, orientation: ScrollAreaOrientation, track_length: f32, thumb: Element, ) -> Element

Decorate and position one application-owned scrollbar thumb inside its scrollbar. This is [`Self::thumb_with`] plus the structural geometry a draggable thumb needs: the thumb is absolutely positioned along the scrollbar's axis at [`ScrollAreaState::thumb_offset`] with [`ScrollAreaState::thumb_length`], so it follows the offset without the application re-deriving either value. Cross-axis size and every visual property stay application-owned.

pub fn positioned_thumb( self, state: &ScrollAreaState, orientation: ScrollAreaOrientation, track_length: f32, ) -> Element

Create the unstyled positioned thumb part. Use [`Self::positioned_thumb_with`] to supply an existing element.

pub fn corner_with(self, corner: Element) -> Element

Decorate the application-owned corner between a horizontal and a vertical scrollbar.

pub fn corner(self) -> Element

Create the unstyled corner part. Use [`Self::corner_with`] to supply an existing element.