org.eclipse.gef4.fx.anchors

Class ChopBoxAnchor.IComputationStrategy.Impl

java.lang.Object

org.eclipse.gef4.fx.anchors.ChopBoxAnchor.IComputationStrategy.Impl

All Implemented Interfaces:

ChopBoxAnchor.IComputationStrategy

Enclosing interface:

ChopBoxAnchor.IComputationStrategy

public static class ChopBoxAnchor.IComputationStrategy.Impl
extends java.lang.Object
implements ChopBoxAnchor.IComputationStrategy

The default implementation of the ChopBoxAnchor.IComputationStrategy computes an anchor position as follows:

1. Compute the anchorage geometry based on its visual ( getAnchorageReferenceGeometryInLocal(Node)).
2. Compute an anchorage reference position based on its geometry ( computeAnchorageReferencePointInLocal(Node, IGeometry, Point) ).
3. Transform this reference position into the coordinate system of the scene ( computeAnchorageReferencePointInScene(Node, IGeometry, Point) ).
4. Connect anchored and anchorage reference positions.
5. Compute the intersection of the connection and the outline of the anchorage geometry (getOutlines(IGeometry)).

Nested Class Summary

Nested classes/interfaces inherited from interface org.eclipse.gef4.fx.anchors.ChopBoxAnchor.IComputationStrategy

ChopBoxAnchor.IComputationStrategy.Impl

Constructor Summary

Constructors

Constructor and Description
Impl()

Method Summary

Modifier and Type	Method and Description
Point	computeAnchorageReferencePointInLocal(javafx.scene.Node anchorage, IGeometry geometryInLocal, Point anchoredReferencePointInAnchorageLocal) Computes the anchorage reference position within the coordinate system of the given IGeometry.
protected Point	computeAnchorageReferencePointInScene(javafx.scene.Node anchorage, IGeometry geometryInLocal, Point anchoredReferencePointInScene) Computes the anchorage reference position in scene coordinates, based on the given anchorage geometry.
Point	computePositionInScene(javafx.scene.Node anchorage, javafx.scene.Node anchored, Point anchoredReferencePointInLocal) Computes an anchor position based on the given anchorage visual, anchored visual, and anchored reference point.
protected IGeometry	getAnchorageReferenceGeometryInLocal(javafx.scene.Node anchorage) Determines the anchorage geometry based on the given anchorage visual.
protected Point	getNearestVertex(Point boundsCenter, ICurve curve) Determines the vertex of the given ICurve which is nearest to the given center Point.
protected Point	getNearestVertex(Point boundsCenter, IShape shape) Determines the vertex of the given IShape which is nearest to the given center Point.
protected Point	getNearestVertex(Point boundsCenter, Path path) Determines the vertex of the given Path which is nearest to the given center Point.
java.util.List<ICurve>	getOutlines(IGeometry geometry) Determines the outline of the given IGeometry, represented as a list of ICurves.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Impl

public Impl()

Method Detail

computeAnchorageReferencePointInLocal

public Point computeAnchorageReferencePointInLocal(javafx.scene.Node anchorage,
                                                   IGeometry geometryInLocal,
                                                   Point anchoredReferencePointInAnchorageLocal)

Computes the anchorage reference position within the coordinate system of the given IGeometry. For an IShape geometry, the center is used if it is contained within the shape, otherwise, the vertex nearest to the center is used as the reference position. For an ICurve geometry, the first point is used as the reference position.

Parameters:

anchorage - The anchorage visual.

geometryInLocal - The anchorage geometry within the local coordinate system of the anchorage visual.

anchoredReferencePointInAnchorageLocal - Refernce point of the anchored for which to determine the anchorage reference point. Within the local coordinate system of the anchorage.

Returns:

A position within the given IGeometry.

computeAnchorageReferencePointInScene

protected Point computeAnchorageReferencePointInScene(javafx.scene.Node anchorage,
                                                      IGeometry geometryInLocal,
                                                      Point anchoredReferencePointInScene)

Computes the anchorage reference position in scene coordinates, based on the given anchorage geometry.

Parameters:

anchorage - The anchorage visual.

geometryInLocal - The anchorage geometry within the coordinate system of the anchorage visual.

anchoredReferencePointInScene - The reference Point of the anchored for which the anchorage reference Point is to be determined.

Returns:

The anchorage reference position.

See Also:

computeAnchorageReferencePointInLocal(Node, IGeometry, Point)

computePositionInScene

public Point computePositionInScene(javafx.scene.Node anchorage,
                                    javafx.scene.Node anchored,
                                    Point anchoredReferencePointInLocal)

Description copied from interface: ChopBoxAnchor.IComputationStrategy

Computes an anchor position based on the given anchorage visual, anchored visual, and anchored reference point.

Specified by:

computePositionInScene in interface ChopBoxAnchor.IComputationStrategy

Parameters:

anchorage - The anchorage visual.

anchored - The anchored visual.

anchoredReferencePointInLocal - The anchored reference point within the local coordinate system of the anchored visual.

Returns:

The anchor position.

getAnchorageReferenceGeometryInLocal

protected IGeometry getAnchorageReferenceGeometryInLocal(javafx.scene.Node anchorage)

Determines the anchorage geometry based on the given anchorage visual. For an GeometryNode, the corresponding geometry is returned. Otherwise, a Rectangle representing the layout-bounds of the visual is returned.

Parameters:

anchorage - The anchorage visual.

Returns:

The anchorage geometry within the local coordinate system of the given anchorage visual.

getNearestVertex

protected Point getNearestVertex(Point boundsCenter,
                                 ICurve curve)

Determines the vertex of the given ICurve which is nearest to the given center Point. The vertices for the ICurve are computed via its bezier curve approximation. For all BezierCurves that are part of the approximation, the start point, middle point, and end point is considered as a vertex.

Parameters:

boundsCenter - The ideal anchorage reference position.

curve - The anchorage geometry.

Returns:

The curve vertex nearest to the given boundsCenter.

getNearestVertex

protected Point getNearestVertex(Point boundsCenter,
                                 IShape shape)

Determines the vertex of the given IShape which is nearest to the given center Point.

Parameters:

boundsCenter - The ideal anchorage reference position.

shape - The anchorage geometry.

Returns:

The shape vertex nearest to the given boundsCenter.

getNearestVertex

protected Point getNearestVertex(Point boundsCenter,
                                 Path path)

Determines the vertex of the given Path which is nearest to the given center Point.

Parameters:

boundsCenter - The ideal anchorage reference position.

path - The anchorage geometry.

Returns:

The vertex of the given Path that is nearest to the given Point.

getOutlines

public java.util.List<ICurve> getOutlines(IGeometry geometry)

Determines the outline of the given IGeometry, represented as a list of ICurves.

Parameters:

geometry - The anchorage geometry.

Returns:

A list of ICurves representing the outline of the given IGeometry.