SchedulerPhase enum
The various phases that a SchedulerBinding goes through during SchedulerBinding.handleBeginFrame.
This is exposed by SchedulerBinding.schedulerPhase.
The values of this enum are ordered in the same order as the phases occur, so their relative index values can be compared to each other.
See also:
- WidgetsBinding.drawFrame, which pumps the build and rendering pipeline to generate a frame.
Values
- idle → const SchedulerPhase
-
No frame is being processed. Tasks (scheduled by SchedulerBinding.scheduleTask), microtasks (scheduled by scheduleMicrotask), Timer callbacks, event handlers (e.g. from user input), and other callbacks (e.g. from Futures, Streams, and the like) may be executing.
- transientCallbacks → const SchedulerPhase
-
The transient callbacks (scheduled by SchedulerBinding.scheduleFrameCallback) are currently executing.
Typically, these callbacks handle updating objects to new animation states.
- midFrameMicrotasks → const SchedulerPhase
-
Microtasks scheduled during the processing of transient callbacks are current executing.
This may include, for instance, callbacks from futures resolved during the transientCallbacks phase.
- persistentCallbacks → const SchedulerPhase
-
The persistent callbacks (scheduled by SchedulerBinding.addPersistentFrameCallback) are currently executing.
Typically, this is the build/layout/paint pipeline. See WidgetsBinding.drawFrame and SchedulerBinding.handleDrawFrame.
- postFrameCallbacks → const SchedulerPhase
-
The post-frame callbacks (scheduled by SchedulerBinding.addPostFrameCallback) are currently executing.
Typically, these callbacks handle cleanup and scheduling of work for the next frame.
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- index → int
-
A numeric identifier for the enumerated value.
no setterinherited
- name → String
-
Available on Enum, provided by the EnumName extension
The name of the enum value.no setter - runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Constants
-
values
→ const List<
SchedulerPhase> - A constant List of the values in this enum, in order of their declaration.