GridHeader class
A widget that displays a header cell for a grid or table.
The GridHeader can display a leading icon and indentation for the first column, and centers the header content for other columns. It uses the HeaderRow model to determine the content of each header cell.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- GridHeader
Constructors
-
GridHeader({Key? key, required int maxLevel, required int columnIndex, required HeaderRow headerRow, ValueListenable<
TreeDataTableSortDirection?> ? sortDirection, VoidCallback? onSort, ValueListenable<bool> ? filterActive}) -
Creates a GridHeader widget.
const
Properties
- columnIndex → int
-
The index of the column this header represents.
final
-
filterActive
→ ValueListenable<
bool> ? -
Whether this column has an active filter.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- headerRow → HeaderRow
-
The data model containing header cell widgets.
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- maxLevel → int
-
The maximum tree depth, used for indentation in the first column.
final
- onSort → VoidCallback?
-
Cycles this column's sort direction when the header is pressed.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
sortDirection
→ ValueListenable<
TreeDataTableSortDirection?> ? -
Current sort direction for this column.
final
Methods
-
build(
BuildContext context) → Widget -
Describes the part of the user interface represented by this widget.
override
-
createElement(
) → StatelessElement -
Creates a StatelessElement to manage this widget's location in the tree.
inherited
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of DiagnosticsNode objects describing this node's
children.
inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toDiagnosticsNode(
{String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode -
Returns a debug representation of the object that is used by debugging
tools and by DiagnosticsNode.toStringDeep.
inherited
-
toString(
{DiagnosticLevel minLevel = DiagnosticLevel.info}) → String -
A string representation of this object.
inherited
-
toStringDeep(
{String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String -
Returns a string representation of this node and its descendants.
inherited
-
toStringShallow(
{String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String -
Returns a one-line detailed description of the object.
inherited
-
toStringShort(
) → String -
A short, textual description of this widget.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited