GesturePatternDetector class
A widget that detects a Morse code-like gesture pattern.
This widget wraps another widget (child
) and listens for user gestures.
It recognizes a pattern of gestures, such as taps, long presses, and swipes,
and triggers the onPattern callback when the specified pattern is successfully matched.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- GesturePatternDetector
Constructors
-
GesturePatternDetector({required GesturePattern pattern, required VoidCallback onPattern, required Widget child, Duration timeout = const Duration(seconds: 5), Key? key, HitTestBehavior? behavior, Set<
PointerDeviceKind> ? supportedDevices, bool excludeFromSemantics = false, bool trackpadScrollCausesScale = false, DragStartBehavior dragStartBehavior = DragStartBehavior.start, Offset trackpadScrollToScaleFactor = kDefaultTrackpadScrollToScaleFactor}) -
Creates a GesturePatternDetector widget.
const
Properties
- behavior → HitTestBehavior?
-
How this gesture detector should behave during hit testing when deciding
how the hit test propagates to children and whether to consider targets
behind this one.
final
- child → Widget
-
The widget that will be wrapped with the gesture detector.
final
- dragStartBehavior → DragStartBehavior
-
Determines the way that drag start behavior is handled.
final
- excludeFromSemantics → bool
-
Whether to exclude these gestures from the semantics tree. For
example, the long-press gesture for showing a tooltip is
excluded because the tooltip itself is included in the semantics
tree directly and so having a gesture to show it would result in
duplication of information.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- onPattern → VoidCallback
-
Callback invoked when the gesture pattern is successfully matched.
final
- pattern → GesturePattern
-
The gesture pattern to detect.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
supportedDevices
→ Set<
PointerDeviceKind> ? -
The kind of devices that are allowed to be recognized.
final
- timeout → Duration
-
The duration within which the gesture pattern must be completed.
final
- trackpadScrollCausesScale → bool
-
Whether scrolling up/down on a trackpad should cause scaling instead of
panning.
final
- trackpadScrollToScaleFactor → Offset
-
A factor to control the direction and magnitude of scale when converting
trackpad scrolling.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< GesturePatternDetector> -
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