ptolemy.vergil.unit

Class BasicEdgeHighlighter

java.lang.Object

diva.canvas.AbstractFigure

diva.canvas.AbstractFigureContainer

diva.canvas.FigureDecorator

ptolemy.vergil.unit.BasicEdgeHighlighter

All Implemented Interfaces:

CanvasComponent, Figure, FigureContainer, FigureSet, VisibleComponent, UserObjectContainer

public class BasicEdgeHighlighter
extends FigureDecorator

A decorator figure that displays a highlight behind an edge. This capability was planned for BasicHighlighter but there doesn't seem to be an easy way to determine that an edge is being painted. This class is a stripped down version of BasicHighlighter with the paint method modified so that it assumes that an edge is being highlighted.

Since:

Ptolemy II 8.0

Version:

$Id$

Author:

Rowland R Johnson

Pt.AcceptedRating:

Red (rowland)

Pt.ProposedRating:

Red (rowland)

Constructor Summary

Constructors

Constructor and Description
BasicEdgeHighlighter() Create a new highlighter with a default paint, "halo", and stroke.

Method Summary

Modifier and Type	Method and Description
boolean	hit(java.awt.geom.Rectangle2D region) Return false.
FigureDecorator	newInstance(Figure f) Create a new instance of this highlighter.
void	paint(java.awt.Graphics2D g) Paint the edge.
void	repaint() Request a repaint of the figure and highlight.
void	repaint(DamageRegion d) Receive repaint notification.

Methods inherited from class diva.canvas.FigureDecorator

add, contains, figures, figuresFromBack, figuresFromFront, getBounds, getChild, getContainer, getDecoratedFigure, getFigureCount, getShape, remove, replaceChild, setChild, transform, translate

Methods inherited from class diva.canvas.AbstractFigureContainer

decorate, pick, pick, undecorate

Methods inherited from class diva.canvas.AbstractFigure

contains, getInteractor, getLayer, getOrigin, getParent, getToolTipText, getTransformContext, getUserObject, intersects, isVisible, paint, 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.VisibleComponent

isVisible, paint, setVisible

Methods inherited from interface diva.canvas.CanvasComponent

getParent, getTransformContext

Constructor Detail

BasicEdgeHighlighter

public BasicEdgeHighlighter()

Create a new highlighter with a default paint, "halo", and stroke.

Method Detail

hit

public boolean hit(java.awt.geom.Rectangle2D region)

Return false. This method always returns false, as it is meaningless (and dangerous!) to be able to hit a highlight.

Specified by:

hit in interface Figure

Overrides:

hit in class FigureDecorator

Parameters:

region - The rectangle to be checked.

Returns:

true if the figure is hit by the given rectangle.

newInstance

public FigureDecorator newInstance(Figure f)

Create a new instance of this highlighter.

Specified by:

newInstance in class FigureDecorator

Parameters:

f - The figure

Returns:

The new instance of the figure decorator.

paint

public void paint(java.awt.Graphics2D g)

Paint the edge. This method first paints the highlight over the contained edge by drawing a line width determined by halo. It then paints the contained edge.

Specified by:

paint in interface VisibleComponent

Overrides:

paint in class FigureDecorator

Parameters:

g - The Graphics context

repaint

public void repaint(DamageRegion d)

Receive repaint notification. This method generates another repaint() call, with a larger region, in order to ensure that the highlight is repainted.

Specified by:

repaint in interface CanvasComponent

Overrides:

repaint in class AbstractFigureContainer

Parameters:

d - The region where a repaint has occurred.

repaint

public void repaint()

Request a repaint of the figure and highlight. This method reads the bounding box of the highlighted figure, and requests a repaint of that box stretched in each direction by the halo.

Specified by:

repaint in interface CanvasComponent

Overrides:

repaint in class AbstractFigure