CustomHeader class

a custom Indicator for header

here is the very simple usage

CustomHeader(
     builder: (context,mode){
       Widget body;
       if(mode==RefreshStatus.idle){
         body = Text("pull down refresh");
       }
      else if(mode==RefreshStatus.refreshing){
         body = CupertinoActivityIndicator();
       }
       else if(mode==RefreshStatus.canRefresh){
         body = Text("release to refresh");
       }
       else if(mode==RefreshStatus.completed){
         body = Text("refreshCompleted!");
      }
       return Container(
         height: 60.0,
         child: Center(
           child: body,
         ),
      );
     },
   )

If you need to listen overScroll event do some animate,you should use OnOffsetChange callback in SmartRefresher finally,If your indicator contain more complex animation and need to update frequently ,I suggest you extends RefreshIndicator to implements

See also

CustomFooter, a custom Indicator for footer

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatefulWidget
• RefreshIndicator
• CustomHeader

Constructors

CustomHeader({Key? key, required HeaderBuilder builder, VoidFutureCallBack? readyToRefresh, VoidFutureCallBack? endRefresh, OffsetCallBack? onOffsetChange, ModeChangeCallBack<RefreshStatus>? onModeChange, VoidCallback? onResetValue, double height = 60.0, Duration completeDuration = const Duration(milliseconds: 600), RefreshStyle refreshStyle = RefreshStyle.Follow})

const

Properties

builder → HeaderBuilder

final

completeDuration → Duration

the stopped time when refresh complete or fail

final, inherited

endRefresh → VoidFutureCallBack?

final

hashCode → int

The hash code for this object.

no setter, inherited

height → double

the visual extent indicator

final, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

offset → double

final, inherited

onModeChange → ModeChangeCallBack<RefreshStatus>?

final

onOffsetChange → OffsetCallBack?

final

onResetValue → VoidCallback?

final

readyToRefresh → VoidFutureCallBack?

final

refreshStyle → RefreshStyle?

refresh display style

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

createElement() → StatefulElement

Creates a StatefulElement to manage this widget's location in the tree.

inherited

createState() → State<StatefulWidget>

Creates the mutable state for this widget at a given location in the tree.

override

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}) → 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