INestedNavigation

Implement this interface on your IAttributes class to participate in standard canvas object navigation.

Properties

RectangleF MotionBoundary { get; }

Gets the boundary within which navigation is enabled. When in doubt, return the IAttributes.Bounds of the object.

MotionType MotionTypes { get; }

Gets the supported motions on this navigation element.

bool BeginPan(PointF from, out object state)

Begin a panning operation.

Parameters:

from (PointF)	Start location of pan.
state (out object)	State object which will be shared back during calls to ContinuePan(PointF, float, float, object).

Returns: True if panning is supposed to actually start.

bool BeginZoom(PointF from, out object state)

Begin a zooming operation.

Parameters:

from (PointF)	Anchor location of zoom.
state (out object)	State object which will be shared back during calls to ContinueZoom(PointF, float, object).

Returns: True if zooming is supposed to actually start.

bool ContinuePan(PointF from, float dx, float dy, object state)

Continuation of a panning operation.

Parameters:

from (PointF)	Start location of pan.
dx (float)	Horizontal panning amount from origin point.
dy (float)	Vertical panning amount from origin point.
state (object)	Shared state.

Returns: True on pan, false on no change.

bool ContinueZoom(PointF from, float factor, object state)

Continuation of a zooming operation using a precomputed factor.

Parameters:

Returns: True on zoom, false on no change.