ptolemy.vergil.modal

Class KielerLayoutArcConnector

java.lang.Object

diva.canvas.AbstractFigure

diva.canvas.connector.AbstractConnector

diva.canvas.connector.ArcConnector

ptolemy.vergil.modal.KielerLayoutArcConnector

All Implemented Interfaces:

CanvasComponent, Connector, Figure, VisibleComponent, UserObjectContainer

public class KielerLayoutArcConnector
extends ArcConnector

Extends the regular ArcConnector, allowing to draw spline paths, i.e. series of bezier curves.

Since:

Ptolemy II 11.0

Version:

$Id$

Author:

Ulf Rueegg

See Also:

KielerLayoutConnector

Pt.ProposedRating:

red (uru)

Field Summary

Fields inherited from class diva.canvas.connector.ArcConnector

_CLOSE_THRESHOLD

Constructor Summary

Constructors

Constructor and Description
KielerLayoutArcConnector(Site tail, Site head) Construct a new connector with the given tail and head for the specified link.

Method Summary

Modifier and Type	Method and Description
void	repositionLabel() Tell the connector to reposition its label if it has one.
void	route() Tell the connector to route itself between the current positions of the head and tail sites.
static void	setLayoutInProgress(boolean inProgress) Notifies layout connections that a layout is in progress, which stops them from deciding to remove layout hints from relations.

Methods inherited from class diva.canvas.connector.ArcConnector

getAngle, getArcMidpoint, getGamma, getMidpointSite, getSelfLoop, setAngle, setGamma, setSelfLoop, translate, translateMidpoint

Methods inherited from class diva.canvas.connector.AbstractConnector

getBounds, getDashArray, getHeadEnd, getHeadSite, getLabelFigure, getLineWidth, getShape, getStroke, getStrokePaint, getTailEnd, getTailSite, headMoved, hit, intersects, paint, reroute, setDashArray, setHeadEnd, setHeadSite, setLabelFigure, setLineWidth, setShape, setStroke, setStrokePaint, setTailEnd, setTailSite, tailMoved, transform

Methods inherited from class diva.canvas.AbstractFigure

contains, getInteractor, getLayer, getOrigin, getParent, getToolTipText, getTransformContext, getUserObject, isVisible, paint, repaint, repaint, setInteractor, setParent, setToolTipText, setUserObject, setVisible

Methods inherited from class java.lang.Object

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

Methods inherited from interface diva.canvas.Figure

contains, getInteractor, getLayer, getOrigin, getParent, getToolTipText, setInteractor, setParent, setToolTipText

Methods inherited from interface diva.canvas.VisibleComponent

isVisible, paint, setVisible

Methods inherited from interface diva.canvas.CanvasComponent

getTransformContext, repaint, repaint

Methods inherited from interface diva.util.UserObjectContainer

getUserObject, setUserObject

Constructor Detail

KielerLayoutArcConnector

public KielerLayoutArcConnector(Site tail,
                                Site head)

Construct a new connector with the given tail and head for the specified link. The connector is either drawn as a spline (in case KIELER layout information is available) or in the classic arc-style fashion as implemented by the super-class.

Parameters:

tail - The tail site.

head - The head site.

Method Detail

route

public void route()

Tell the connector to route itself between the current positions of the head and tail sites. If bend points are available, draw the line with these instead. Delete bend point information if modification detected (i.e., movement of one or the other end of a link).

Specified by:

route in interface Connector

Overrides:

route in class ArcConnector

repositionLabel

public void repositionLabel()

Tell the connector to reposition its label if it has one. The label is currently only positioned at the center of the arc.

Overrides:

repositionLabel in class ArcConnector

setLayoutInProgress

public static void setLayoutInProgress(boolean inProgress)

Notifies layout connections that a layout is in progress, which stops them from deciding to remove layout hints from relations. Without this mechanism, it can happen that layout hints get removed seemingly at random. This is caused by layout connectors thinking that one actor in a relation is moved during the application of the layout results. This in turn triggers the corresponding layout hint to be viewed as being invalid, and consequently to be removed.

A call to this method with the parameter value true must always be followed by a call with the parameter value false.

Note: This mechanism is not thread-safe! However, since the problem only occurs while a layout result is being applied through a MoMLChangeRequest (of which only one is ever being executed at a given time), this shouldn't be a problem.

Parameters:

inProgress - true if a layout result is currently being applied.