Struct DndAction

pub struct DndAction(/* private fields */);

drag and drop actions

This is a bitmask of the available/preferred actions in a drag-and-drop operation.

In the compositor, the selected action is a result of matching the actions offered by the source and destination sides. “action” events with a “none” action will be sent to both source and destination if there is no match. All further checks will effectively happen on (source actions ∩ destination actions).

In addition, compositors may also pick different actions in reaction to key modifiers being pressed. One common design that is used in major toolkits (and the behavior recommended for compositors) is:

• If no modifiers are pressed, the first match (in bit order) will be used.
• Pressing Shift selects “move”, if enabled in the mask.
• Pressing Control selects “copy”, if enabled in the mask.

Behavior beyond that is considered implementation-dependent. Compositors may for example bind other modifiers (like Alt/Meta) or drags initiated with other buttons than BTN_LEFT to specific actions (e.g. “ask”).

Implementations

impl DndAction

pub const None: Self

no action

Since version 1.

pub const Copy: Self

copy action

Since version 1.

pub const Move: Self

move action

Since version 1.

pub const Ask: Self

ask action

Since version 1.

pub fn empty() -> Self

pub fn contains(self, item: Self) -> bool

Trait Implementations

impl BitOr for DndAction

type Output = DndAction

The resulting type after applying the | operator.

fn bitor(self, rhs: Self) -> Self

Performs the | operation.

impl BitOrAssign for DndAction

fn bitor_assign(&mut self, rhs: Self)

Performs the |= operation.

impl Clone for DndAction

fn clone(&self) -> DndAction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DndAction

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

Formats the value using the given formatter.

impl Default for DndAction

fn default() -> DndAction

Returns the “default value” for a type.

impl From<DndAction> for u32

fn from(val: DndAction) -> Self

Converts to this type from the input type.

impl From<u32> for DndAction

fn from(val: u32) -> Self

Converts to this type from the input type.

impl PartialEq for DndAction

fn eq(&self, other: &DndAction) -> 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 Copy for DndAction

impl Eq for DndAction

impl StructuralPartialEq for DndAction