SliverWaterfallFlowDelegateWithMaxCrossAxisExtent class

Creates masonry layouts with tiles that each have a maximum cross-axis extent.

This delegate will select a cross-axis extent for the tiles that is as large as possible subject to the following conditions:

• The extent evenly divides the cross-axis extent of the grid.
• The extent is at most maxCrossAxisExtent.

For example, if the grid is vertical, the grid is 500.0 pixels wide, and maxCrossAxisExtent is 150.0, this delegate will create a grid with 4 columns that are 125.0 pixels wide.

This delegate creates grids with equally cross-axis sized and spaced tiles.

See also:

• SliverWaterfallFlowDelegateWithFixedCrossAxisCount, which creates a masonry layout with a fixed number of tiles in the cross axis.
• MasonryGridView, which uses this delegate to control the layout of its tiles.
• SliverWaterfallFlow, which uses this delegate to control the layout of its tiles.
• RenderSliverWaterfallFlow, which uses this delegate to control the layout of its tiles.

Inheritance

• Object
• ExtendedListDelegate
• SliverWaterfallFlowDelegate
• SliverWaterfallFlowDelegateWithMaxCrossAxisExtent

Constructors

SliverWaterfallFlowDelegateWithMaxCrossAxisExtent({required double maxCrossAxisExtent, double mainAxisSpacing = 0.0, double crossAxisSpacing = 0.0, LastChildLayoutTypeBuilder? lastChildLayoutTypeBuilder, CollectGarbage? collectGarbage, ViewportBuilder? viewportBuilder, bool closeToTrailing = false})

Creates a delegate that makes masonry layouts with tiles that have a maximum cross-axis extent.

const

Properties

closeToTrailing → bool

when reverse property of List is true, layout is as following. it likes chat list, and new session will insert to zero index but it's not right when items are not full of viewport.

final, inherited

collectGarbage → CollectGarbage?

Call when collect garbage, return indexes of children which are disposed to collect

final, inherited

crossAxisSpacing → double

The number of logical pixels between each child along the cross axis.

final, inherited

hashCode → int

The hash code for this object.

no setter, inherited

lastChildLayoutTypeBuilder → LastChildLayoutTypeBuilder?

The builder to get layout type of last child Notice: it should only for last child

final, inherited

mainAxisSpacing → double

The number of logical pixels between each child along the main axis.

final, inherited

maxCrossAxisExtent → double

The maximum extent of tiles in the cross axis.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

viewportBuilder → ViewportBuilder?

The builder to get indexes in viewport

final, inherited

Methods

getChildUsableCrossAxisExtent(SliverConstraints constraints) → double

Return usable cross-axis extent of each child.

inherited

getCrossAxisCount(SliverConstraints constraints) → int

Return crossAxisCount by SliverWaterfallFlowDelegateWithFixedCrossAxisCount and SliverWaterfallFlowDelegateWithMaxCrossAxisExtent.

override

getCrossAxisOffset(SliverConstraints constraints, int? crossAxisIndex) → double

Return the offset of the child in the non-scrolling axis.

inherited

getLastChildLayoutType(int index) → LastChildLayoutType

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

shouldRelayout(SliverWaterfallFlowDelegate oldDelegate) → bool

Return true when the children need to be laid out.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited