Struct DragPanel 

pub struct DragPanel { /* private fields */ }

Everything gpui_base::dock exports, so a consumer never has to depend on the foundation crate directly to write a skin or read a container’s state. Kept in step with base’s own list by every_base_dock_export_is_reachable_from_here.

Two names are handled elsewhere and one is deliberately absent: base’s Panel and PanelView arrive as BasePanel and BasePanelView because this module’s Panel/PanelView are the presentation halves that extend them, and base’s Dock — a plain state struct holding one dock’s open, collapsible, size and resizing flags — is not re-exported at all, because the name meant a panel container in every released version of this crate and handing it back with a different meaning is worse than dropping it. A skin reads a dock through DockContext. A panel being dragged out of a tab group.

The panel is carried as a PanelId rather than a view handle: the base layer has no PanelView trait or TabPanel entity of its own (those are layered above), and the layout algebra already addresses panels this way (see insert_panel/remove_panel/move_panel in layout::edit). A consumer resolves the id back to a view through the dock area’s panel map.

Implementations

impl DragPanel

pub fn new(panel: PanelId, source: NodeId) -> DragPanel

pub fn panel(&self) -> PanelId

pub fn source(&self) -> NodeId

The tab group this panel was dragged out of.

pub fn drag_offset(&self) -> Point<Pixels>

pub fn set_drag_offset(&self, offset: Point<Pixels>)

Records where inside the panel the drag started, so a preview can be positioned relative to the cursor.

pub fn preview_size(&self) -> Size<Pixels>

How large the drag preview is on screen.

The dock reads it to decide where a drop placeholder flies in from, which is hit geometry rather than styling; the preview’s own size is a visual decision, so the skin that draws the preview reports it here. Defaults to zero, which degrades to a placeholder that grows out of the cursor rather than out of the preview.

pub fn set_preview_size(&self, size: Size<Pixels>)

pub fn drag_session_id(&self) -> u64

Trait Implementations

impl Clone for DragPanel

fn clone(&self) -> DragPanel

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Render for DragPanel

fn render( &mut self, _window: &mut Window, _cx: &mut Context<'_, DragPanel>, ) -> impl IntoElement

Base draws nothing: the styled drag preview is appearance and belongs to crates/component, which reintroduces it as a separate render type.