org.jhotdraw.draw
Class LocatorLayouter

java.lang.Object
  org.jhotdraw.draw.LocatorLayouter

All Implemented Interfaces:

Layouter

public class LocatorLayouter
extends java.lang.Object
implements Layouter

A layouter which lays out all children of a CompositeFigure according to their LayoutLocator property..

Version:

2.0 2006-01-14 Changed to support double precision coordinates.
1.0 3. Februar 2004 Created.

Author:

Werner Randelshofer

Field Summary

static AttributeKey<Locator>

LAYOUT_LOCATOR LayoutLocator property used by the children to specify their location relative to the compositeFigure.

Constructor Summary

LocatorLayouter()
Creates a new instance.

Method Summary

java.awt.geom.Rectangle2D.Double	calculateLayout(CompositeFigure compositeFigure, java.awt.geom.Point2D.Double anchor, java.awt.geom.Point2D.Double lead) Calculate the layout for the figure and all its subelements.
java.awt.geom.Rectangle2D.Double	layout(CompositeFigure compositeFigure, java.awt.geom.Point2D.Double anchor, java.awt.geom.Point2D.Double lead) Method which lays out a figure.

Methods inherited from class java.lang.Object

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

Field Detail

LAYOUT_LOCATOR

public static final AttributeKey<Locator> LAYOUT_LOCATOR

LayoutLocator property used by the children to specify their location relative to the compositeFigure.

Constructor Detail

LocatorLayouter

public LocatorLayouter()

Creates a new instance.

Method Detail

calculateLayout

public java.awt.geom.Rectangle2D.Double calculateLayout(CompositeFigure compositeFigure,
                                                        java.awt.geom.Point2D.Double anchor,
                                                        java.awt.geom.Point2D.Double lead)

Description copied from interface: Layouter

Calculate the layout for the figure and all its subelements. The layout is not actually performed but just its dimensions are calculated.

Specified by:

calculateLayout in interface Layouter

anchor - start point for the layout

lead - minimum lead point for the layout

layout

public java.awt.geom.Rectangle2D.Double layout(CompositeFigure compositeFigure,
                                               java.awt.geom.Point2D.Double anchor,
                                               java.awt.geom.Point2D.Double lead)

Description copied from interface: Layouter

Method which lays out a figure. It is called by the figure if a layout task is to be performed. Implementing classes specify a certain layout algorithm in this method.

Specified by:

layout in interface Layouter

anchor - start point for the layout

lead - minimum lead point for the layout