VisibilityInfo class
Data passed to the VisibilityDetector.onVisibilityChanged callback.
- Annotations
Constructors
- VisibilityInfo({required Key key, Size? size, Rect? visibleBounds})
-
Constructor.
const
- VisibilityInfo.fromRects({required Key key, required Rect widgetBounds, required Rect clipRect})
-
Constructs a VisibilityInfo from widget bounds and a corresponding
clipping rectangle.
factory
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key
-
The key for the corresponding VisibilityDetector widget.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- size → Size
-
The size of the widget.
final
- visibleBounds → Rect
-
The visible portion of the widget, in the widget's local coordinates.
final
- visibleFraction → double
-
A fraction in the range [0, 1] that represents what proportion of the
widget is visible (assuming rectangular bounding boxes).
no setter
Methods
-
matchesVisibility(
VisibilityInfo info) → bool - Returns true if the specified VisibilityInfo object has equivalent visibility to this one.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited