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PinPolicy

damascene_core::tree

Enum PinPolicy

pub enum PinPolicy {
    None,
    Start,
    End,
}

Expand description

Sticky-edge behavior for a scroll viewport. Mirrors egui’s ScrollArea::stick_to_bottom family.

None – the stored offset is the only source of truth; content changes do not shift it.
Start – when engaged, the offset stays glued to 0 so newly added rows at the top stay visible. Engages on first layout and re-engages when the user scrolls back to the head; releases when the user scrolls away.
End – when engaged, the offset stays glued to max_offset so newly added rows at the bottom stay visible (chat-log idiom). Engages on first layout, releases on scroll-away, re-engages on return to the tail.

Variants§

None

Start

End

Trait Implementations§

impl Clone for PinPolicy

fn clone(&self) -> PinPolicy

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

impl Debug for PinPolicy

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

Formats the value using the given formatter. Read more

impl Default for PinPolicy

fn default() -> PinPolicy

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

impl PartialEq for PinPolicy

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

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

1.0.0 (const: unstable) · Source§

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 PinPolicy

impl Eq for PinPolicy

impl StructuralPartialEq for PinPolicy

Auto Trait Implementations§

impl Freeze for PinPolicy

impl RefUnwindSafe for PinPolicy

impl Send for PinPolicy

impl Sync for PinPolicy

impl Unpin for PinPolicy

impl UnsafeUnpin for PinPolicy

impl UnwindSafe for PinPolicy

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more

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

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

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

fn into(self) -> U

Calls U::from(self).

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

impl<T> Same for T

type Output = T

Should always be Self

impl<SS, SP> SupersetOf<SS> for SP
where SS: SubsetOf<SP>,

fn to_subset(&self) -> Option<SS>

The inverse inclusion map: attempts to construct self from the equivalent element of its superset. Read more

fn is_in_subset(&self) -> bool

Checks if self is actually part of its subset T (and can be converted to it).

fn to_subset_unchecked(&self) -> SS

Use with care! Same as self.to_subset but without any property checks. Always succeeds.

fn from_subset(element: &SS) -> SP

The inclusion map: converts self to the equivalent element of its superset.

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

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<T> Scalar for T
where T: 'static + Clone + PartialEq + Debug,