Enum DragMode 

pub enum DragMode {
    NoDrag,
    ScrollHandDrag,
    RubberBand,
}

What a SceneView’s on-canvas pointer drag does in empty space.

• DragMode::NoDrag — nothing happens. Useful for embedded read-only diagrams.
• DragMode::ScrollHandDrag — left-click-drag pans the view. Item-level on-drag handlers are bypassed; the canvas grabs the gesture unconditionally.
• DragMode::RubberBand (default) — drag-on-empty-space creates a marquee that selects items inside on release. Drag-on-an-item dispatches to that item’s drag handler if wired (the drag pipeline honours IS_DRAGGABLE for drag-to-move).

Variants

NoDrag

Empty-space drag is a no-op; useful for read-only embedded diagrams.

ScrollHandDrag

Left-click-drag pans the viewport; item-level drag handlers are bypassed.

RubberBand

Empty-space drag draws a selection marquee; item drag dispatches to the item’s drag handler (respecting IS_DRAGGABLE). This is the default.

Trait Implementations

impl Clone for DragMode

fn clone(&self) -> DragMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DragMode

impl Debug for DragMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for DragMode

fn default() -> DragMode

Returns the “default value” for a type.

impl Eq for DragMode

impl PartialEq for DragMode

fn eq(&self, other: &DragMode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for DragMode