A virtual viewport that displays a single child at a time.
Useful for Pageable widgets.
One unit of start offset corresponds to one child widget, which means a start offset of 2.75 indicates that the viewport is three quarters of the way between the child with index 2 and the child with index 3.
PageViewport differs from LazyPageViewport in that PageViewport uses an Iterable list of children. That makes PageViewport suitable for a large (but not extremely large or infinite) list of children.
- Mixes-in
- VirtualViewportFromIterable
Constructors
-
PageViewport({double startOffset: 0.0, Axis mainAxis: Axis.vertical, ViewportAnchor anchor: ViewportAnchor.start, bool itemsWrap: false, Iterable<Widget> children: const
[] }) -
Creates a virtual viewport that displays a single child at a time.
Properties
- children → Iterable<Widget>
-
read-only
- anchor → ViewportAnchor
-
Whether to place first child at the start of the container or the last child at the end of the container, when the viewport has not been offset.
read-only, inherited - hashCode → int
-
Get a hash code for this object.
read-only, inherited - itemsWrap → bool
-
Whether the first item should be revealed after scrolling past the last item.
read-only, inherited - key → Key
-
Controls how one widget replaces another widget in the tree.
read-only, inherited - mainAxis → Axis
-
The direction in which the children are permitted to be larger than the viewport.
read-only, inherited - runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited - startOffset → double
-
read-only, inherited
Operators
-
operator ==(
other) → bool -
The equality operator.
inherited
Methods
-
createElement(
) → _VirtualPageViewportElement -
RenderObjectWidgets always inflate to a
RenderObjectElementsubclass.inherited -
createRenderObject(
BuildContext context) → RenderList -
Creates an instance of the
RenderObjectclass that thisRenderObjectWidgetrepresents, using the configuration described by thisRenderObjectWidget.inherited -
debugFillDescription(
List<String> description) → void -
Add additional information to the given description for use by toString.
inherited -
didUnmountRenderObject(
RenderObject renderObject) → void -
A render object previously associated with this widget has been removed from the tree. The given RenderObject will be of the same type as returned by this object's createRenderObject.
inherited -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited -
toString(
) → String -
Returns a string representation of this object.
inherited -
toStringShort(
) → String -
A short, textual description of this widget.
inherited -
updateRenderObject(
BuildContext context, RenderObject renderObject) → void -
Copies the configuration described by this RenderObjectWidget to the given RenderObject, which will be of the same type as returned by this object's createRenderObject.
inherited