pub struct PreviewPhase(());Expand description
The frame’s preview phase: the hypothetical geometry a drag implies, written before anything paints.
A value rather than a convention, because the ordering is invisible
otherwise. A Drawing re-derives the settled wires as
it is built, so geometry previewed after the frame painted is wiped before
anything can read it — which freezes the wires for the whole of a drag.
Drawing’s preview writers require one of these, and the frame driver
hands the one it mints only to preview — so “preview before you paint” is
a data dependency rather than a convention.
Tuple Fields§
§0: ()Implementations§
Source§impl PreviewPhase
impl PreviewPhase
Sourcepub fn frame() -> PreviewPhase
pub fn frame() -> PreviewPhase
Minted once per frame by the driver that runs preview before
widget — tools::tool::frame, which lives above this crate.
Auto Trait Implementations§
impl Freeze for PreviewPhase
impl RefUnwindSafe for PreviewPhase
impl Send for PreviewPhase
impl Sync for PreviewPhase
impl Unpin for PreviewPhase
impl UnsafeUnpin for PreviewPhase
impl UnwindSafe for PreviewPhase
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