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

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§

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impl DndAction

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pub const None: Self = _

no action

Since version 1.

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pub const Copy: Self = _

copy action

Since version 1.

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pub const Move: Self = _

move action

Since version 1.

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pub const Ask: Self = _

ask action

Since version 1.

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pub fn empty() -> Self

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

Trait Implementations§

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impl BitOr for DndAction

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type Output = DndAction

The resulting type after applying the | operator.
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fn bitor(self, rhs: Self) -> Self

Performs the | operation. Read more
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impl Clone for DndAction

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fn clone(&self) -> DndAction

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for DndAction

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

Formats the value using the given formatter. Read more
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impl Default for DndAction

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fn default() -> DndAction

Returns the “default value” for a type. Read more
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impl From<DndAction> for u32

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fn from(val: DndAction) -> Self

Converts to this type from the input type.
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impl From<u32> for DndAction

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fn from(val: u32) -> Self

Converts to this type from the input type.
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impl Copy for DndAction

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.