Struct DragAndDrop

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pub struct DragAndDrop { /* private fields */ }

Expand description

Tracking of drag-and-drop payload.

This is a low-level API.

For a higher-level API, see:

See this example.

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impl DragAndDrop

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pub fn set_payload<Payload>(ctx: &Context, payload: Payload)
where Payload: Any + Send + Sync,

Set a drag-and-drop payload.

This can be read by Self::payload until the pointer is released.

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pub fn clear_payload(ctx: &Context)

Clears the payload, setting it to None.

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pub fn payload<Payload>(ctx: &Context) -> Option<Arc<Payload>>
where Payload: Any + Send + Sync,

Retrieve the payload, if any.

Returns None if there is no payload, or if it is not of the requested type.

Returns Some both during a drag and on the frame the pointer is released (if there is a payload).

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pub fn take_payload<Payload>(ctx: &Context) -> Option<Arc<Payload>>
where Payload: Any + Send + Sync,

Retrieve and clear the payload, if any.

Returns None if there is no payload, or if it is not of the requested type.

Returns Some both during a drag and on the frame the pointer is released (if there is a payload).

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pub fn has_payload_of_type<Payload>(ctx: &Context) -> bool
where Payload: Any + Send + Sync,

Are we carrying a payload of the given type?

Returns true both during a drag and on the frame the pointer is released (if there is a payload).

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pub fn has_any_payload(ctx: &Context) -> bool

Are we carrying a payload?

Returns true both during a drag and on the frame the pointer is released (if there is a payload).

Trait Implementations§

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impl Clone for DragAndDrop

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fn clone(&self) -> DragAndDrop

Returns a duplicate 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 Default for DragAndDrop

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fn default() -> DragAndDrop

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl !UnwindSafe for DragAndDrop

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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. 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 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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