RotaryKnob class
Rotary control for a normalized (0..1) parameter.
onChangeStart and onChangeEnd bracket a drag so that callers can map it to a single VST3 beginEdit/performEdit/endEdit automation gesture.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- RotaryKnob
Constructors
-
RotaryKnob({Key? key, required String label, required double value, required String display, required ValueChanged<
double> onChanged, required VoidCallback onChangeStart, required VoidCallback onChangeEnd, Color color = const Color(0xFF00E5FF), double size = 100.0}) -
Creates a knob showing
valuewithdisplayas the centre readout.const
Properties
- color → Color
-
Colour of the value arc and readout.
final
- display → String
-
Formatted value shown in the centre of the knob.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- label → String
-
Caption shown above the knob.
final
-
onChanged
→ ValueChanged<
double> -
Called with the new normalized value for every drag update.
final
- onChangeEnd → VoidCallback
-
Called once when a drag gesture ends or is cancelled.
final
- onChangeStart → VoidCallback
-
Called once when a drag gesture starts.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- size → double
-
Width and height of the knob.
final
- value → double
-
Current normalized value.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< RotaryKnob> -
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, int wrapWidth = 65}) → 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