ScaleNotifier class

A ChangeNotifier that manages a scaling factor for UI elements. It provides methods to zoom in, zoom out, and reset the zoom level.

Inheritance

Constructors

ScaleNotifier.new()

Properties

hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Whether any listeners are currently registered.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scale → double
The current scale factor.
no setter

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
dispose() → void
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners() → void
Call all the registered listeners.
inherited
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
resetZoom() → void
Resets the scale factor to 1.0.
toString() → String
A string representation of this object.
inherited
updateScale(double newScale) → void
Updates the scale factor to a newScale value, clamped between _minScale and _maxScale.
zoomIn() → void
Increases the scale factor by _scaleIncrement, up to _maxScale.
zoomOut() → void
Decreases the scale factor by _scaleIncrement, down to _minScale.

Operators

operator ==(Object other) → bool
The equality operator.
inherited