Struct re_viewer_context::BlueprintUndoState

pub struct BlueprintUndoState {
    current_time: Option<TimeInt>,
    inflection_points: BTreeSet<TimeInt>,
}

We store the entire edit history of a blueprint in its store.

When undoing, we move back time, and redoing move it forward. When editing, we first drop all data after the current time.

Fields

current_time: Option<TimeInt>

The current blueprint time, used for latest-at.

Everything after this time is in “redo-space”, and will be dropped before new events are appended to the timeline.

If None, use the max time of the blueprint timeline.

inflection_points: BTreeSet<TimeInt>

Interesting times to undo/redo to.

When the user drags a slider or similar, we get new events recorded on each frame. The user presumably wants to undo the whole slider drag, and not each increment of it.

So we use a heuristic to estimate when such interactions start/stop, and add them to this set.

Implementations

impl BlueprintUndoState

pub fn default_query() -> LatestAtQuery

Default latest-at query

pub fn oldest_undo_point(&self) -> Option<TimeInt>

How far back in time can we undo?

pub fn blueprint_query(&self) -> LatestAtQuery

pub fn redo_time(&self) -> Option<TimeInt>

If set, everything after this time is in “redo-space” (futurum). If None, there is no undo-buffer.

pub fn set_redo_time(&mut self, time: TimeInt)

pub fn undo(&mut self, blueprint_db: &EntityDb)

pub fn redo(&mut self)

pub fn redo_all(&mut self)

pub fn clear_redo_buffer(&mut self, blueprint_db: &mut EntityDb)

After calling this, there is no way to redo what was once undone.

pub fn update(&mut self, egui_ctx: &Context, blueprint_db: &EntityDb)

Trait Implementations

impl Clone for BlueprintUndoState

fn clone(&self) -> BlueprintUndoState

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for BlueprintUndoState

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

Formats the value using the given formatter.

impl Default for BlueprintUndoState

fn default() -> BlueprintUndoState

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for BlueprintUndoState

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for BlueprintUndoState

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.