PaintingBinding mixin
Binding for the painting library.
Hooks into the cache eviction logic to clear the image cache.
Requires the ServicesBinding to be mixed in earlier.
- Superclass Constraints
- Implemented by
Constructors
Properties
- imageCache → ImageCache
-
The singleton that implements the Flutter framework's image cache. [...]
read-only
- systemFonts → Listenable
-
Listenable that notifies when the available fonts on the system have
changed. [...]
read-only
- defaultBinaryMessenger → BinaryMessenger
-
The default instance of BinaryMessenger. [...]
read-only, inherited
- hashCode → int
-
The hash code for this object. [...]
read-only, inherited
- locked → bool
-
Whether lockEvents is currently locking events. [...]
@protected, read-only, inherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
- window → Window
-
The window to which this binding is bound. [...]
read-only, inherited
Methods
-
createImageCache(
) → ImageCache -
Creates the ImageCache singleton (accessible via imageCache). [...]
@protected
-
evict(
String asset) → void -
Called in response to the
ext.flutter.evict
service extension. [...]override -
handleSystemMessage(
Object systemMessage) → Future< void> -
Handler called for messages received on the SystemChannels.system
message channel. [...]
override
-
initInstances(
) → void -
The initialization method. Subclasses override this method to hook into
the platform and otherwise configure their services. Subclasses must call
"super.initInstances()". [...]
override
-
instantiateImageCodec(
Uint8List bytes, { int cacheWidth int cacheHeight }) → Future< Codec> -
Calls through to dart:ui with
decodedCacheRatioCap
from ImageCache. [...] -
createBinaryMessenger(
) → BinaryMessenger -
Creates a default BinaryMessenger instance that can be used for sending
platform messages.
@protected, inherited
-
initLicenses(
) → void -
Adds relevant licenses to the LicenseRegistry. [...]
@mustCallSuper, @protected, inherited
-
initServiceExtensions(
) → void -
Called when the binding is initialized, to register service
extensions. [...]
inherited
-
lockEvents(
Future< void> callback()) → Future<void> -
Locks the dispatching of asynchronous events and callbacks until the
callback's future completes. [...]
@protected, inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed. [...]
inherited
-
performReassemble(
) → Future< void> -
This method is called by reassembleApplication to actually cause the
application to reassemble, e.g. after a hot reload. [...]
@mustCallSuper, @protected, inherited
-
postEvent(
String eventKind, Map< String, dynamic> eventData) → void -
All events dispatched by a BindingBase use this method instead of
calling developer.postEvent directly so that tests for BindingBase
can track which events were dispatched by overriding this method.
@protected, inherited
-
reassembleApplication(
) → Future< void> -
Cause the entire application to redraw, e.g. after a hot reload. [...]
inherited
-
registerBoolServiceExtension(
{String name, AsyncValueGetter< bool> getter, AsyncValueSetter<bool> setter }) → void -
Registers a service extension method with the given name (full
name "ext.flutter.name"), which takes a single argument
"enabled" which can have the value "true" or the value "false"
or can be omitted to read the current value. (Any value other
than "true" is considered equivalent to "false". Other arguments
are ignored.) [...]
@protected, inherited
-
registerNumericServiceExtension(
{String name, AsyncValueGetter< double> getter, AsyncValueSetter<double> setter }) → void -
Registers a service extension method with the given name (full
name "ext.flutter.name"), which takes a single argument with the
same name as the method which, if present, must have a value
that can be parsed by double.parse, and can be omitted to read
the current value. (Other arguments are ignored.) [...]
@protected, inherited
-
registerServiceExtension(
{String name, ServiceExtensionCallback callback }) → void -
Registers a service extension method with the given name (full name
"ext.flutter.name"). [...]
@protected, inherited
-
registerSignalServiceExtension(
{String name, AsyncCallback callback }) → void -
Registers a service extension method with the given name (full
name "ext.flutter.name"), which takes no arguments and returns
no value. [...]
@protected, inherited
-
registerStringServiceExtension(
{String name, AsyncValueGetter< String> getter, AsyncValueSetter<String> setter }) → void -
Registers a service extension method with the given name (full name
"ext.flutter.name"), which optionally takes a single argument with the
name "value". If the argument is omitted, the value is to be read,
otherwise it is to be set. Returns the current value. [...]
@protected, inherited
-
toString(
) → String -
Returns a string representation of this object.
inherited
-
unlocked(
) → void -
Called by lockEvents when events get unlocked. [...]
@mustCallSuper, @protected, inherited
Operators
-
operator ==(
dynamic other) → bool -
The equality operator. [...]
inherited
Static Properties
- instance → PaintingBinding
-
The current PaintingBinding, if one has been created.
read-only
- shaderWarmUp ↔ ShaderWarmUp
-
ShaderWarmUp to be executed during initInstances. [...]
read / write