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ChangeFlags

frust::authoring

Struct ChangeFlags 

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

Bitflags describing what work a View::rebuild pass invalidated.

Combine with |. LAYOUT implies a subsequent paint, but the flags are stored orthogonally so a caller can distinguish “geometry changed” from “only pixels changed”; use ChangeFlags::needs_paint for the common “does anything need repainting?” query.

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impl ChangeFlags

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pub const NONE: ChangeFlags

Nothing changed; no downstream work required.

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pub const PAINT: ChangeFlags

The widget must be re-painted.

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pub const LAYOUT: ChangeFlags

The widget must be re-laid-out (and therefore re-painted).

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pub const fn contains(self, other: ChangeFlags) -> bool

Whether self contains every bit set in other.

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pub const fn union(self, other: ChangeFlags) -> ChangeFlags

The union of two flag sets.

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pub const fn is_empty(self) -> bool

Whether no flags are set.

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pub const fn needs_paint(self) -> bool

Whether this change requires a repaint (either PAINT or LAYOUT).

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pub const fn needs_layout(self) -> bool

Whether this change requires a relayout.

Trait Implementations§

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impl BitOr for ChangeFlags

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type Output = ChangeFlags

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

Performs the | operation. Read more
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impl BitOrAssign for ChangeFlags

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fn bitor_assign(&mut self, rhs: ChangeFlags)

Performs the |= operation. Read more
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impl Clone for ChangeFlags

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fn clone(&self) -> ChangeFlags

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
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impl Copy for ChangeFlags

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impl Debug for ChangeFlags

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

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

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fn default() -> ChangeFlags

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

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impl PartialEq for ChangeFlags

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more
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impl StructuralPartialEq for ChangeFlags

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