diva.canvas

Interface Figure

All Superinterfaces:

CanvasComponent, UserObjectContainer, VisibleComponent

All Known Subinterfaces:

Connector, DrawFigure, GrabHandle, ShapedFigure, Terminal

All Known Implementing Classes:

AbstractConnector, AbstractFigure, AbstractFigureContainer, ArcConnector, ArcManipulator, BackgroundedCompositeFigure, BasicEllipse, BasicFigure, BasicGrabHandle, BasicHighlighter, BasicRectangle, BoundsManipulator, CircleManipulator, CompositeFigure, ConnectorManipulator, ConnectorTutorial.SitedRectangle, DrawBasicFigure, DrawCompositeFigure, DrawEllipseFigure, DrawFreehandFigure, DrawLabelFigure, DrawLineFigure, DrawPathFigure, DrawPolygonFigure, DrawPolylineFigure, DrawRectangleFigure, FigureDecorator, FigureTutorial.CustomRectangle, FigureWrapper, IconFigure, ImageFigure, InterpolatedCurveFigure, InterpolatedCurveManipulator, LabelFigure, LabelWrapper, ManhattanConnector, Manipulator, MoveHandle, PaintedFigure, PaintedFigure, PaneWrapper, PathFigure, PathManipulator, RangeManipulator, StateBubble, StraightConnector, StraightTerminal, SwingWrapper, TerminalFigure, TransformedFigureTutorial.CloudFigure, TypedDecorator, VectorFigure, WarpImageFigure, XRangeFigure

public interface Figure
extends VisibleComponent, UserObjectContainer

A Figure is a persistent object drawn on the screen. This interface roots a small tree of interfaces that define various roles that different kinds of figures play. It is also implemented by the AbstractFigure class, which roots the tree of concrete figure classes.

Version:

$Revision: 1.40 $

Author:

John Reekie

Method Summary

Modifier and Type	Method and Description
boolean	contains(Point2D p) Test whether this figure contains the point given.
Rectangle2D	getBounds() Get the bounding box of this figure.
Interactor	getInteractor() Return the interactor of this figure.
CanvasLayer	getLayer() Get the most immediate layer containing this figure.
Point2D	getOrigin() Return the origin of the figure in the enclosing transform context.
CanvasComponent	getParent() Return the parent of this figure.
Shape	getShape() Get the outline shape of this figure.
String	getToolTipText() Return the tooltip string for this figure, or null if the figure does not have a tooltip.
boolean	hit(Rectangle2D r) Test if this figure is "hit" by the given rectangle.
boolean	intersects(Rectangle2D r) Test if this figure intersects the given rectangle.
void	setInteractor(Interactor interactor) Set the interactor of this figure.
void	setParent(CanvasComponent fc) Set the parent of this figure.
void	setToolTipText(String s) Set the tooltip string for this figure.
void	transform(AffineTransform at) Transform the figure with the supplied transform.
void	translate(double x, double y) Move the figure the indicated distance.

Methods inherited from interface diva.canvas.VisibleComponent

isVisible, paint, paint, setVisible

Methods inherited from interface diva.canvas.CanvasComponent

getTransformContext, repaint, repaint

Methods inherited from interface diva.util.UserObjectContainer

getUserObject, setUserObject

Method Detail

contains

boolean contains(Point2D p)

Test whether this figure contains the point given. The point given is in the enclosing transform context.

getBounds

Rectangle2D getBounds()

Get the bounding box of this figure. The result rectangle is given in the enclosing transform context. The returned rectangle may be an internally cached shape, and should not be modified.

getInteractor

Interactor getInteractor()

Return the interactor of this figure. Return null if there isn't one.

getLayer

CanvasLayer getLayer()

Get the most immediate layer containing this figure.

getOrigin

Point2D getOrigin()

Return the origin of the figure in the enclosing transform context. This might be, for example, the center of the figure, the upper left corner, or some other point with respect to which the pieces of the figure are defined.

Returns:

The origin of the figure.

getParent

CanvasComponent getParent()

Return the parent of this figure. Return null if the figure does not have a parent. (Note that a figure with no parent can exist, but it will not be displayed, as it must be in a layer for the figure canvas to ever call its paint method.)

Specified by:

getParent in interface CanvasComponent

getShape

Shape getShape()

Get the outline shape of this figure. The outline shape is used for things like highlighting. The result shape is given in the enclosing transform context.

getToolTipText

String getToolTipText()

Return the tooltip string for this figure, or null if the figure does not have a tooltip.

hit

boolean hit(Rectangle2D r)

Test if this figure is "hit" by the given rectangle. This is the same as intersects if the interior of the figure is not transparent. The rectangle is given in the enclosing transform context. If the figure is not visible, it must return false. The default implementation is the same as intersects if the figure is visible.

(This method would be better named hits, but the name hit is consistent with java.awt.Graphics2D.)

intersects

boolean intersects(Rectangle2D r)

Test if this figure intersects the given rectangle. The rectangle is given in the enclosing transform context.

setInteractor

void setInteractor(Interactor interactor)

Set the interactor of this figure. Once a figure has an interactor given to it, it will respond to events on the canvas, in the ways determined by the interactor.

setParent

void setParent(CanvasComponent fc)

Set the parent of this figure. A null argument means that the figure is being removed from its parent. No checks are performed to see if the figure already has a parent -- it is the responsibility of the caller to do this. This method is not intended for public use, and should never be called by client code.

setToolTipText

void setToolTipText(String s)

Set the tooltip string for this figure. If the string is null, then the figure will not have a tooltip.

transform

void transform(AffineTransform at)

Transform the figure with the supplied transform. This can be used to perform arbitrary translation, scaling, shearing, and rotation operations.

translate

void translate(double x,
               double y)

Move the figure the indicated distance.