Enum PanFrame 

pub enum PanFrame {
    Drawn,
    Kept,
    Replayed,
    Moved,
}

What the frame being drawn lets a strip drawn in screen space do with the drawings it keeps of its windows (crate::widget::GroupRow).

Variants

Drawn

Anything may have changed: every window is drawn, and the drawings are dropped.

Kept

The frame only moved laid-out content, but every window is drawn (its host is about to read what they note while drawing). Nothing in them changed, so the drawings stay good for the frames after.

Replayed

The frame only moved laid-out content: a window at rest may show its last drawing moved to where the window is now.

Moved

The frame only moved laid-out content, and its host does not draw again before input: a window at rest may show its last drawing only where it stays where it was drawn (a strip drawn in canvas coordinates while the presenter pans it), so what its widgets noted while drawing still holds.

Implementations

impl PanFrame

pub fn only_moved(self) -> bool

Nothing but laid-out positions changed since the frame before.

Trait Implementations

impl Clone for PanFrame

fn clone(&self) -> PanFrame

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PanFrame

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

Formats the value using the given formatter.

impl PartialEq for PanFrame

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

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

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 PanFrame

impl Eq for PanFrame

impl StructuralPartialEq for PanFrame