TreeViewTheme class Null safety

Defines the appearance of the TreeView.

Used by TreeView to control the appearance of the sub-widgets in the TreeView widget.

Constructors

TreeViewTheme({ColorScheme colorScheme = const ColorScheme.light(), IconThemeData iconTheme = const IconThemeData.fallback(), ExpanderThemeData expanderTheme = const ExpanderThemeData.fallback(), TextStyle labelStyle = const TextStyle(), TextStyle parentLabelStyle = const TextStyle(fontWeight: FontWeight.bold), TextOverflow? labelOverflow, TextOverflow? parentLabelOverflow, double levelPadding = _kDefaultLevelPadding, bool dense = true, double? verticalSpacing, double? horizontalSpacing, double iconPadding = 8, Duration expandSpeed = const Duration(milliseconds: _kExpandSpeed)})
const
TreeViewTheme.fallback()
Creates a TreeView theme with some reasonable default values.
const

Properties

colorScheme ColorScheme
The ColorScheme for TreeView widget.
final
dense bool
Whether the TreeNode is vertically dense.
final
expanderTheme ExpanderThemeData
The appearance theme for TreeNode expander icons.
final
expandSpeed Duration
the speed at which expander icon animates.
final
hashCode int
The hash code for this object.
read-onlyoverride
horizontalSpacing double?
Horizontal spacing between tabs. If this property is null then horizontal spacing between tabs is default _treeView.theme.iconTheme.size + 5
final
iconPadding double
Horizontal padding for node icons.
final
iconTheme IconThemeData
The default appearance theme for TreeNode icons.
final
labelOverflow TextOverflow?
The text overflow for child TreeNode text. If this property is null then softWrap is true;
final
labelStyle TextStyle
The text style for child TreeNode text.
final
levelPadding double
The horizontal padding for the children of a TreeNode parent.
final
parentLabelOverflow TextOverflow?
The text overflow for parent TreeNode text. If this property is null then softWrap is true;
final
parentLabelStyle TextStyle
The text style for parent TreeNode text.
final
quickExpandSpeed Duration
read-only
runtimeType Type
A representation of the runtime type of the object.
read-onlyinherited
verticalSpacing double?
Vertical spacing between tabs. If this property is null then dense attribute will work and vice versa.
final

Methods

copyWith({ColorScheme? colorScheme, IconThemeData? iconTheme, ExpanderThemeData? expanderTheme, TextStyle? labelStyle, TextStyle? parentLabelStyle, TextOverflow? labelOverflow, TextOverflow? parentLabelOverflow, bool? dense, double? verticalSpacing, double? horizontalSpacing, double? iconPadding, double? levelPadding}) TreeViewTheme
Creates a copy of this theme but with the given fields replaced with the new values.
merge(TreeViewTheme other) TreeViewTheme
Returns a new theme that matches this TreeView theme but with some values replaced by the non-null parameters of the given icon theme. If the given TreeViewTheme is null, simply returns this theme.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
resolve(BuildContext context) TreeViewTheme
toString() String
A string representation of this object.
inherited

Operators

operator ==(Object other) bool
The equality operator.
override