Struct ChangeSet 

pub struct ChangeSet { /* private fields */ }

What changed between two snapshots, accumulated per subscriber.

Implementations

impl ChangeSet

pub fn merge(&mut self, other: &ChangeSet)

Merges other into this set.

pub fn has_structure_change(&self) -> bool

Returns true if rows were inserted, removed or replaced wholesale.

pub fn has_insertions_or_reset(&self) -> bool

Returns true if rows were inserted or every row was replaced: the display order has to be rebuilt.

pub fn is_reset(&self) -> bool

Returns true if every row was replaced or removed (replace_all, clear): a new data set, not a stream of changes.

pub fn inserted(&self) -> usize

The number of inserted rows.

pub fn removed(&self) -> &[RowId]

The ids of removed rows (empty after a reset, which removes all).

A row that fades out (HighlightPolicy::with_removal_fade) is here at its removal, so the selection lets go of its key at once, and in Self::faded when its fade ends.

pub fn faded(&self) -> &[RowId]

The ids of fading rows the store dropped from its snapshots: their fade ended, their key was written again, or a reset (replace_all, clear) dropped every fading row. A view that shows fading rows drops them from its projection. Self::removed reported them already, at removal, so they are not a structure change.

pub fn has_parent_change(&self) -> bool

Returns true if a replaced row has another GridRow::parent_key than its previous version: a tree view rebuilds on it. Reported even when no column changed; such a replacement is in Self::updated, without highlight.

pub fn columns(&self) -> ColumnSet

The columns whose values changed in data rows. Pinned rows do not add to it: they are not in the display order. Neither does a replacement that changes no column.

pub fn updated(&self) -> &[RowId]

The ids of rows replaced by a new row or marked changed, so a view can tell whether any of them is on screen.

A replacement that changes no column is here too, without highlight and without Self::columns: data the columns do not show, such as a tooltip text or a style input, may have changed, so a view repaints the row if it is on screen, and the display order needs no work. The same Arc written again is not a replacement.

pub fn has_pinned_change(&self) -> bool

Returns true if a band of pinned rows changed: rows, order or values. A row replaced by a new Arc is a change even when no column changed; a band of the same Arcs in the same order is not. The display order needs no work for it, only a repaint.

pub fn has_progress_change(&self) -> bool

Returns true if the progress written through GridWriter::set_progress changed.

pub fn is_empty(&self) -> bool

Returns true if nothing changed.

Trait Implementations

impl Clone for ChangeSet

fn clone(&self) -> ChangeSet

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChangeSet

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

Formats the value using the given formatter.

impl Default for ChangeSet

fn default() -> ChangeSet

Returns the “default value” for a type.

impl PartialEq for ChangeSet

fn eq(&self, other: &ChangeSet) -> 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 Eq for ChangeSet

impl StructuralPartialEq for ChangeSet