A virtual viewport onto a grid of widgets.

Used by ScrollableGrid.

See also:

Inheritance

Constructors

GridViewport({double scrollOffset, GridDelegate delegate, ExtentsChangedCallback onExtentsChanged, Iterable<Widget> children: const [] })

Creates a virtual viewport onto a grid of widgets.

Properties

children → Iterable<Widget>

read-only
delegate → GridDelegate

The delegate that controls the layout of the children.

read-only
onExtentsChanged → ExtentsChangedCallback

Called when the interior or exterior dimensions of the viewport change.

read-only
scrollOffset → double

The startOffset without taking the delegate's padding into account.

read-only
startOffset → double

read-only
hashCode → int

Get a hash code for this object.

read-only, inherited
key → Key

Controls how one widget replaces another widget in the tree.

read-only, inherited
runtimeType → Type

A representation of the runtime type of the object.

read-only, inherited

Operators

operator ==(other) → bool

The equality operator.

inherited

Methods

createElement() → _GridViewportElement

RenderObjectWidgets always inflate to a RenderObjectElement subclass.

createRenderObject(BuildContext context) → RenderGrid

Creates an instance of the RenderObject class that this RenderObjectWidget represents, using the configuration described by this RenderObjectWidget.

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