PictureRecorder class abstract
Records a Picture containing a sequence of graphical operations.
To begin recording, construct a Canvas to record the commands. To end recording, use the PictureRecorder.endRecording method.
Use with the Flutter framework
The Flutter framework's RendererBinding provides a hook for creating PictureRecorder objects (RendererBinding.createPictureRecorder) that allows tests to hook into the scene creation logic. When creating a PictureRecorder and Canvas that will be used with a PictureLayer as part of the Scene in the context of the Flutter framework, consider calling RendererBinding.createPictureRecorder instead of calling the PictureRecorder.new constructor directly.
This does not apply when using a canvas to generate a bitmap for other purposes, e.g. for generating a PNG image using Picture.toImage.
Constructors
- PictureRecorder()
-
Creates a new idle PictureRecorder. To associate it with a
Canvas and begin recording, pass this PictureRecorder to the
Canvas constructor.
factory
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- isRecording → bool
-
Whether this object is currently recording commands.
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
endRecording(
) → Picture - Finishes recording graphical operations.
-
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