InfiniteExtentMetrics class
Metrics for Infinite scroll controller. This is an immutable snapshot of the current values of scroll position. This can directly be accessed by ScrollNotification to currently selected real item index at any time.
- Inheritance
-
- Object
- FixedScrollMetrics
- InfiniteExtentMetrics
Constructors
- InfiniteExtentMetrics({required double? minScrollExtent, required double? maxScrollExtent, required double? pixels, required double? viewportDimension, required AxisDirection axisDirection, required double devicePixelRatio, required int itemIndex})
Properties
- atEdge → bool
-
Whether the pixels value is exactly at the minScrollExtent or the
maxScrollExtent.
no setterinherited
- axis → Axis
-
The axis in which the scroll view scrolls.
no setterinherited
- axisDirection → AxisDirection
-
The direction in which the scroll view scrolls.
finalinherited
- devicePixelRatio → double
-
The FlutterView.devicePixelRatio of the view that the Scrollable
associated with this metrics object is drawn into.
finalinherited
- extentAfter → double
-
The quantity of content conceptually "below" the viewport in the scrollable.
This is the content below the content described by extentInside.
no setterinherited
- extentBefore → double
-
The quantity of content conceptually "above" the viewport in the scrollable.
This is the content above the content described by extentInside.
no setterinherited
- extentInside → double
-
The quantity of content conceptually "inside" the viewport in the
scrollable (including empty space if the total amount of content is less
than the viewportDimension).
no setterinherited
- extentTotal → double
-
The total quantity of content available.
no setterinherited
- hasContentDimensions → bool
-
Whether the minScrollExtent and the maxScrollExtent properties are available.
no setterinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasPixels → bool
-
Whether the pixels property is available.
no setterinherited
- hasViewportDimension → bool
-
Whether the viewportDimension property is available.
no setterinherited
- itemIndex → int
-
The scroll view's currently selected item index.
final
- maxScrollExtent → double
-
The maximum in-range value for pixels.
no setterinherited
- minScrollExtent → double
-
The minimum in-range value for pixels.
no setterinherited
- outOfRange → bool
-
Whether the pixels value is outside the minScrollExtent and
maxScrollExtent.
no setterinherited
- pixels → double
-
The current scroll position, in logical pixels along the axisDirection.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- viewportDimension → double
-
The extent of the viewport along the axisDirection.
no setterinherited
Methods
-
copyWith(
{double? minScrollExtent, double? maxScrollExtent, double? pixels, double? viewportDimension, AxisDirection? axisDirection, double? devicePixelRatio, int? itemIndex}) → InfiniteExtentMetrics -
Creates a ScrollMetrics that has the same properties as this object.
override
-
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