TwoLevelHeader class

this header help you implements twoLevel function easyily, the behaviour just like TaoBao,XieCheng(携程) App TwoLevel

just a example


TwoLevelHeader(
 textStyle: TextStyle(color: Colors.white),
 displayAlignment: TwoLevelDisplayAlignment.fromTop,
 decoration: BoxDecoration(
 image: DecorationImage(
 image: AssetImage("images/secondfloor.jpg"),
 fit: BoxFit.cover,
 // 很重要的属性,这会影响你打开二楼和关闭二楼的动画效果
 alignment: Alignment.topCenter),
),
twoLevelWidget: Container(
  decoration: BoxDecoration(
  image: DecorationImage(
  image: AssetImage("images/secondfloor.jpg"),
  alignment: Alignment.topCenter,
  fit: BoxFit.cover),
  ),
  Container(
    height: 60.0,
    child: GestureDetector(
    child: Icon(
      Icons.arrow_back_ios,
    color: Colors.white,
   ),
  onTap: () {
    SmartRefresher.of(context).controller.twoLevelComplete();
  },
  ),
  alignment: Alignment.bottomLeft,
),
),
);

Inheritance

Constructors

TwoLevelHeader({Key key, double height = 80.0, BoxDecoration decoration, TwoLevelDisplayAlignment displayAlignment = TwoLevelDisplayAlignment.fromBottom, Duration completeDuration = const Duration(milliseconds: 600), TextStyle textStyle = const TextStyle(color: const Color(0xff555555)), String releaseText, String refreshingText, Widget canTwoLevelIcon, String canTwoLevelText, String completeText, String failedText, String idleText, IconPosition iconPos = IconPosition.left, double spacing = 15.0, Widget refreshingIcon, Widget failedIcon = const Icon(Icons.error, color: Colors.grey), Widget completeIcon = const Icon(Icons.done, color: Colors.grey), Widget idleIcon = const Icon(Icons.arrow_downward, color: Colors.grey), Widget releaseIcon = const Icon(Icons.refresh, color: Colors.grey), Widget twoLevelWidget})
const

Properties

canTwoLevelIcon Widget
final
canTwoLevelText String
final
completeDuration Duration
final
completeIcon Widget
final
completeText String
final
decoration BoxDecoration
this attr mostly put image or color
final
displayAlignment TwoLevelDisplayAlignment
fromTop use with RefreshStyle.Behind,from bottom use with Follow Style
final
failedIcon Widget
final
failedText String
final
hashCode int
The hash code for this object. [...]
@nonVirtual, read-only, inherited
height double
final
iconPos IconPosition
final
idleIcon Widget
final
idleText String
final
key Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited
refreshingIcon Widget
final
refreshingText String
final
releaseIcon Widget
final
releaseText String
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
spacing double
icon and text middle margin
final
textStyle TextStyle
final
twoLevelWidget Widget
the content in TwoLevel,display in (twoLevelOpening,closing,TwoLeveling state)
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. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent 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}) 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. [...]
@nonVirtual, inherited