draw.model

Class Group

java.lang.Object

draw.model.Element

draw.model.Group

All Implemented Interfaces:

java.lang.Iterable<Element>

public class Group
extends Element
implements java.lang.Iterable<Element>

Treat a group of Elements as an Element in its own right. Essential part of the Composite design pattern.

Since:

draw.1

Field Summary

Fields inherited from class draw.model.Element

anchorSize, EmptyRectangle

Constructor Summary

Constructors

Constructor and Description
Group(Element... elements) The initial rectangle will likely be computed from a collection of elements that are being grouped together.

Method Summary

Modifier and Type	Method and Description
void	accept(Visitor visitor) Accept a visitor and dispatch.
Group	clone() Clone Group Take care (draw.2) to reinstate parent links.
boolean	contains(java.awt.Point p) Check for containment by comparing any of sub elements.
void	drawElement(java.awt.Graphics g) Draw a group by individually drawing each element.
java.util.Iterator<Element>	iterator()
void	updateBoundingBox() Update bounding box based on child elements.

Methods inherited from class draw.model.Element

draw, getAnchors, getBoundingBox, getParent, getStyle, hasParent, isSelected, outermostGroup, removeParent, resetAnchors, setBoundingBox, setParent, setSelected, setStyle

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

Group

public Group(Element... elements)

The initial rectangle will likely be computed from a collection of elements that are being grouped together. Computes cached_bb based on elements. in draw.2, properly updates parent link for elements

Parameters:

elements - Variable-length collection of Elements (an array works also)

Method Detail

updateBoundingBox

public void updateBoundingBox()

Update bounding box based on child elements. Pulled out of constructor to support dynamic resizing of grouped elements.

Since:

draw.2

drawElement

public void drawElement(java.awt.Graphics g)

Draw a group by individually drawing each element.

Specified by:

drawElement in class Element

Parameters:

g - Graphics object into which to draw

accept

public void accept(Visitor visitor)

Accept a visitor and dispatch.

Overrides:

accept in class Element

Parameters:

visitor - Visitor that performs necessary operations.

iterator

public java.util.Iterator<Element> iterator()

Specified by:

iterator in interface java.lang.Iterable<Element>

clone

public Group clone()

Clone Group Take care (draw.2) to reinstate parent links.

Specified by:

clone in class Element

Returns:

copy of the current element.

contains

public boolean contains(java.awt.Point p)

Check for containment by comparing any of sub elements.

Specified by:

contains in class Element

Parameters:

p - point to query

Returns:

true if element contains the point