api/dev.s7a.strata.component/PanZoomMetrics

PanZoomMetrics

data class PanZoomMetrics(val center: DoubleOffset = DoubleOffset.Zero, val zoom: Double = 1.0, val scale: Double = 1.0, val viewportSize: IntSize = IntSize.Zero, val contentBounds: LongRect = LongRect.Zero, val fit: PanZoomFit = PanZoomFit.Contain, val geometryKnown: Boolean = false)(source)

Immutable position and resolved geometry snapshot for a pan-and-zoom viewport.

PanZoomMetrics.zoom is a multiplier over the base PanZoomMetrics.fit scale, while PanZoomMetrics.scale is the resolved number of logical viewport pixels per content unit. Before a viewport publishes geometry, PanZoomMetrics.geometryKnown is false and PanZoomMetrics.scale is only a finite placeholder that must not be used for coordinate conversion.

Throws

IllegalArgumentException

when numeric values are not finite and positive where required, or known geometry is empty.

Constructors

PanZoomMetrics

constructor(center: DoubleOffset = DoubleOffset.Zero, zoom: Double = 1.0, scale: Double = 1.0, viewportSize: IntSize = IntSize.Zero, contentBounds: LongRect = LongRect.Zero, fit: PanZoomFit = PanZoomFit.Contain, geometryKnown: Boolean = false)