MiuixLayerBackdrop class
通过捕获的图层快照提供背景的 MiuixBackdrop。对应 Kotlin LayerBackdrop。
用 MiuixLayerBackdropCapture 包裹背景容器来录制其渲染输出，再把本对象传给
模糊组件。用 rememberMiuixLayerBackdrop 或直接 MiuixLayerBackdrop() 创建，
需在 dispose 时释放。
- Inheritance
-
- Object
- ChangeNotifier
- MiuixBackdrop
- MiuixLayerBackdrop
Constructors
Properties
- globalOffset → Offset?
-
背景快照在全局（窗口）坐标系中的左上角位置。用于与模糊表面对齐。
no setteroverride
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasListeners → bool
-
Whether any listeners are currently registered.
no setterinherited
- isCoordinatesDependent → bool
-
是否需要布局坐标来正确定位（图层型 backdrop 为 true）。
对应 Kotlin
isCoordinatesDependent。no setteroverride - pixelRatio → double
-
快照的设备像素比（快照按此比例录制）。
no setteroverride
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- snapshot → Image?
-
当前可用于取样的背景快照；未捕获时为 null。
no setteroverride
Methods
-
addListener(
VoidCallback listener) → void -
Register a closure to be called when the object changes.
inherited
-
dispose(
) → void -
Discards any resources used by the object.
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notifyListeners(
) → void -
Call all the registered listeners.
inherited
-
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that are
notified when the object changes.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
-
updateSnapshot(
Image image, Offset globalOffset, double pixelRatio) → void - 由 MiuixLayerBackdropCapture 在每帧录制后调用，更新快照与坐标。
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited