WillPopScope class
Registers a callback to veto attempts by the user to dismiss the enclosing ModalRoute.
See also:
- ModalRoute.addScopedWillPopCallback and ModalRoute.removeScopedWillPopCallback, which this widget uses to register and unregister onWillPop.
- Form, which provides an
onWillPopcallback that enables the form to veto apopinitiated by the app's back button.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- WillPopScope
- Annotations
-
- @Deprecated('Use PopScope instead. ' 'This feature was deprecated after v3.12.0-1.0.pre.')
Constructors
- WillPopScope({Key? key, required Widget child, required WillPopCallback? onWillPop})
-
Creates a widget that registers a callback to veto attempts by the user to
dismiss the enclosing ModalRoute.
const
Properties
- child → Widget
-
The widget below this widget in the tree.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- onWillPop → WillPopCallback?
-
Called to veto attempts by the user to dismiss the enclosing ModalRoute.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< WillPopScope> -
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