Interface IViewportController

Namespace

EncDotNet.S100.Maps

Assembly

EncDotNet.S100.Core.dll

The geographic area and scale the session renders. Backs the set_viewport tool. Renderer-neutral: the viewport is expressed geographically (centre, scale denominator, rotation), not in a renderer's projected units, and the output pixel size is a render argument (see IImageRenderer), not viewport state — so one viewport can be rendered at any size.

public interface IViewportController

Remarks

A null Current means "no explicit viewport" — the host auto-fits the extent of the loaded datasets at render time. Calling Set(MapViewport) pins an explicit viewport; SetToBounds(BoundingBox) frames a bounding box (the host resolves the scale for its own render surface).

Properties

Current

The explicit viewport, or null when the host is auto-fitting the loaded datasets.

MapViewport? Current { get; }

Property Value

MapViewport

Methods

Set(MapViewport)

Pins an explicit geographic viewport.

void Set(MapViewport viewport)

Parameters

viewport MapViewport

The centre, scale, and rotation to render.

SetToBounds(BoundingBox)

Frames a geographic bounding box, letting the host compute the scale that fits it to the render surface.

void SetToBounds(BoundingBox bounds)

Parameters

bounds BoundingBox

The WGS-84 bounding box to frame.