ZoomController class abstract
An abstract zoom controller.
- Implementers
Constructors
- ZoomController({double zoomCoefficient = 0.8, double? minZoom, double? maxZoom})
- Creates a zoom controller instance.
Properties
- contentOffset ↔ double
-
For maintain the position of the pinch focal point position (vertical)
getter/setter pair
- hashCode → int
-
The hash code for this object.
no setterinherited
- maxZoom → double
-
The maximum zoom factor.
final
- minZoom → double
-
The minimum zoom factor.
final
- previousZoomFactor ↔ double
-
The previous zoom factor.
getter/setter pair
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- scale → double
-
Returns the current scale.
no setter
- zoomCoefficient → double
-
The zoom coefficient (<= 0 to disable).
final
- zoomFactor ↔ double
-
Returns the current zoom factor.
getter/setter pair
Methods
-
addListener(
ZoomControllerListener listener) → void - Adds a listener.
-
calculateZoomFactor(
double scale) → double - Calculates a zoom factor according to the specified scale.
-
changeZoomFactor(
double zoomFactor, {bool notify = true, ScaleUpdateDetails? details}) → void - Changes the current zoom factor.
-
dispose(
) → void - Disposes this controller if enabled. You should not use it anymore after having called this method.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
removeListener(
ZoomControllerListener listener) → void - Removes a listener.
-
scaleStart(
ScaleStartDetails details) → void - Should be called when the scale operation start.
-
scaleUpdate(
ScaleUpdateDetails details) → void - Should be called when the scale operation has an update.
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited