PdfViewerZoomStepsDelegate class abstract

Delegate to determine the "Zoom Stops" (snap points) for the viewer.

Zoom stops are primarily used for:

1. Double-tap zooming: Cycling through specific levels (e.g. Fit Page -> Fit Width -> 100%).
2. Accessibility/Keyboard: Incrementing zoom levels via shortcuts.

This delegate decouples the Interaction Policy (which zoom levels are "interesting"?) from the Sizing Policy (what are the hard limits?).

Implementers

• PdfViewerZoomStepsDelegateDefault
• PdfViewerZoomStepsDelegateSmart

Constructors

PdfViewerZoomStepsDelegate()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

dispose() → void

Called when the delegate is being destroyed.

generateZoomStops(PdfViewerLayoutMetrics metrics) → List<double>

Generates the list of zoom stops (steps) for user interaction.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited