org.jhotdraw.draw
Class AbstractCompositeFigure

java.lang.Object
  org.jhotdraw.beans.AbstractBean
      org.jhotdraw.draw.AbstractFigure
          org.jhotdraw.draw.AbstractCompositeFigure

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, CompositeFigure, Figure, DOMStorable

Direct Known Subclasses:

AbstractAttributedCompositeFigure, GraphicalCompositeFigure, GroupFigure, QuadTreeCompositeFigure

public abstract class AbstractCompositeFigure
extends AbstractFigure
implements CompositeFigure, DOMStorable

This abstract class can be extended to implement a CompositeFigure. AbstractCompositeFigure.

Version:

$Id: AbstractCompositeFigure.java 674 2010-07-29 11:11:42Z rawcoder $

Author:

Werner Randelshofer

See Also:

Serialized Form

Nested Class Summary

protected class

AbstractCompositeFigure.EventHandler

Field Summary

protected java.awt.geom.Rectangle2D.Double	cachedBounds Caches the bounds to improve the performance of method getBounds().
protected java.awt.geom.Rectangle2D.Double	cachedDrawingArea Caches the drawing area to improve the performance of method getDrawingArea().
protected java.util.ArrayList<Figure>	children The children that this figure is composed of
protected AbstractCompositeFigure.EventHandler	eventHandler Handles figure changes in the children.
protected Layouter	layouter A Layouter determines how the children of the CompositeFigure are laid out graphically.

Fields inherited from class org.jhotdraw.draw.AbstractFigure

changingDepth, listenerList

Fields inherited from class org.jhotdraw.beans.AbstractBean

propertySupport

Fields inherited from interface org.jhotdraw.draw.CompositeFigure

LAYOUT_INSETS

Fields inherited from interface org.jhotdraw.draw.Figure

CONNECTABLE_PROPERTY, REMOVABLE_PROPERTY, SELECTABLE_PROPERTY, TRANSFORMABLE_PROPERTY

Constructor Summary

AbstractCompositeFigure()

Method Summary

boolean	add(Figure figure) Adds a child to the figure.
void	add(int index, Figure figure) Adds a child to the figure at the specified index.
void	addAll(java.util.Collection<? extends Figure> figures)
void	addAll(int index, java.util.Collection<? extends Figure> figures)
void	addCompositeFigureListener(CompositeFigureListener listener) Adds a listener for this composite figure.
void	addNotify(Drawing drawing) Informs a figure, that it has been added to a drawing.
void	basicAdd(Figure figure) Adds a child to the figure without firing events.
void	basicAdd(int index, Figure figure) Adds a child to the figure at the specified index without firing events.
void	basicAddAll(int index, java.util.Collection<? extends Figure> newFigures)
int	basicRemove(Figure child) Removes the specified child without firing events.
void	basicRemoveAll(java.util.Collection<? extends Figure> figures) Removes all children.
void	basicRemoveAllChildren() Removes all children.
Figure	basicRemoveChild(int index) Removes the child at the specified index without firing events.
void	bringToFront(Figure figure) Brings a figure to the front of the drawing.
void	changed() Informs that a figure changed the area of its display box.
AbstractCompositeFigure	clone() Returns a clone of the figure, with clones of all aggregated figures, such as children and decorators.
boolean	contains(Figure f) Returns true if this composite figure contains the specified figure.
boolean	contains(java.awt.geom.Point2D.Double p) Checks if a point is contained by the figure.
protected AbstractCompositeFigure.EventHandler	createEventHandler()
java.util.Collection<Handle>	createHandles(int detailLevel) Creates handles used to manipulate the figure.
void	draw(java.awt.Graphics2D g) Draws the figure.
Figure	findChild(java.awt.geom.Point2D.Double p)
int	findChildIndex(java.awt.geom.Point2D.Double p)
Figure	findFigureInside(java.awt.geom.Point2D.Double p) Finds the innermost figure at the specified location.
protected void	fireFigureAdded(Figure f, int zIndex) Notify all listenerList that have registered interest for notification on this event type.
protected void	fireFigureRemoved(Figure f, int zIndex) Notify all listenerList that have registered interest for notification on this event type.
<T> T	get(AttributeKey<T> name) Gets an attribute from the Figure.
java.util.Map<AttributeKey,java.lang.Object>	getAttributes() Returns a view to all attributes of this figure.
java.lang.Object	getAttributesRestoreData() Gets data which can be used to restore the attributes of the figure after a set has been applied to it.
java.awt.geom.Rectangle2D.Double	getBounds() Returns the untransformed logical bounds of the figure as a Rectangle.
Figure	getChild(int index) Returns the child figure at the specified index.
int	getChildCount() Returns the number of children.
java.util.List<Figure>	getChildren() Returns an unchangeable list view on the children.
java.util.List<Figure>	getChildrenFrontToBack() Returns an iterator to iterate in Z-order front to back over the children.
java.util.Collection<Figure>	getDecomposition() Returns a decompositon of a figure into its parts.
java.awt.geom.Rectangle2D.Double	getDrawingArea() Returns the drawing area of the figure as a Rectangle.
Layouter	getLayouter() Get a Layouter object which encapsulated a layout algorithm for this figure.
Dimension2DDouble	getPreferredSize() The preferred size is used by Layouter to determine the preferred size of a Figure.
java.lang.Object	getTransformRestoreData() Gets data which can be used to restore the transformation of the figure without loss of precision, after a transform has been applied to it.
int	indexOf(Figure child) Returns the index of the specified child.
protected void	invalidate() Invalidates cached data of the Figure.
void	layout() A layout algorithm is used to define how the child components should be laid out in relation to each other.
void	read(DOMInput in)
boolean	remove(Figure figure) Removes the specified child.
void	removeAll(java.util.Collection<? extends Figure> figures) Removes all specified children.
void	removeAllChildren() Removes all children.
Figure	removeChild(int index) Removes the child at the specified index.
void	removeCompositeFigureListener(CompositeFigureListener listener) Removes a listener from this composite figure.
void	removeNotify(Drawing drawing) Informs a figure, that it has been removed from a drawing.
void	restoreAttributesTo(java.lang.Object newData) Restores the attributes of the figure to a previously stored state.
void	restoreTransformTo(java.lang.Object geometry) Restores the transform of the figure to a previously stored state.
void	sendToBack(Figure figure) Sends a figure to the back of the composite figure.
<T> void	set(AttributeKey<T> key, T value) Sets an attribute on the figure and calls attributeChanged on all registered FigureListeners if the attribute value has changed.
void	setBounds(java.awt.geom.Point2D.Double anchor, java.awt.geom.Point2D.Double lead) Sets the logical and untransformed bounds of the figure.
void	setLayouter(Layouter newLayouter) Set a Layouter object which encapsulated a layout algorithm for this figure.
void	transform(java.awt.geom.AffineTransform tx) Transforms the figure.
protected void	validate()
void	willChange() Informs that a figure is about to change something that affects the contents of its display box.
void	write(DOMOutput out)

Methods inherited from class org.jhotdraw.draw.AbstractFigure

addFigureListener, basicClone, findCompatibleConnector, findConnector, fireAreaInvalidated, fireAreaInvalidated, fireAreaInvalidated, fireAttributeChanged, fireFigureAdded, fireFigureChanged, fireFigureChanged, fireFigureChanged, fireFigureHandlesChanged, fireFigureRemoved, fireFigureRequestRemove, fireUndoableEditHappened, getActions, getChangingDepth, getConnectors, getCursor, getDrawing, getEndPoint, getFontRenderContext, getLayer, getLock, getStartPoint, getTool, getToolTipText, handleDrop, handleMouseClick, includes, isChanging, isConnectable, isRemovable, isSelectable, isTransformable, isVisible, remap, removeFigureListener, requestRemove, setBounds, setConnectable, setRemovable, setSelectable, setTransformable, setVisible, toString

Methods inherited from class org.jhotdraw.beans.AbstractBean

addPropertyChangeListener, addPropertyChangeListener, firePropertyChange, firePropertyChange, firePropertyChange, getPropertyChangeListeners, removePropertyChangeListener, removePropertyChangeListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jhotdraw.draw.Figure

addFigureListener, addPropertyChangeListener, findCompatibleConnector, findConnector, getActions, getConnectors, getCursor, getEndPoint, getLayer, getStartPoint, getTool, getToolTipText, handleDrop, handleMouseClick, includes, isConnectable, isRemovable, isSelectable, isTransformable, isVisible, remap, removeFigureListener, removePropertyChangeListener, requestRemove

Field Detail

layouter

protected Layouter layouter

A Layouter determines how the children of the CompositeFigure are laid out graphically.

children

protected java.util.ArrayList<Figure> children

The children that this figure is composed of

See Also:

add(org.jhotdraw.draw.Figure), removeChild(int)

cachedDrawingArea

protected transient java.awt.geom.Rectangle2D.Double cachedDrawingArea

Caches the drawing area to improve the performance of method getDrawingArea().

cachedBounds

protected transient java.awt.geom.Rectangle2D.Double cachedBounds

Caches the bounds to improve the performance of method getBounds().

eventHandler

protected AbstractCompositeFigure.EventHandler eventHandler

Handles figure changes in the children.

Constructor Detail

AbstractCompositeFigure

public AbstractCompositeFigure()

Method Detail

createHandles

public java.util.Collection<Handle> createHandles(int detailLevel)

Description copied from interface: Figure

Creates handles used to manipulate the figure.

Specified by:

createHandles in interface Figure

Overrides:

createHandles in class AbstractFigure

Parameters:

detailLevel - The detail level of the handles. Usually this is 0 for bounding box handles and 1 for point handles. The value -1 is used by the SelectAreaTracker and the HandleTracker to highlight figures, over which the mouse pointer is hovering.

Returns:

a Collection of handles

See Also:

Handle

createEventHandler

protected AbstractCompositeFigure.EventHandler createEventHandler()

add

public boolean add(Figure figure)

Description copied from interface: CompositeFigure

Adds a child to the figure.

This is a convenience method for add(getChildCount(), child);

This method calls figureAdded on all registered CompositeFigureListeners.

Specified by:

add in interface CompositeFigure

Returns:

true if this CompositeFigure changed as a result of the call

add

public void add(int index,
                Figure figure)

Description copied from interface: CompositeFigure

Adds a child to the figure at the specified index.

This method calls figureAdded on all registered CompositeFigureListeners.

Specified by:

add in interface CompositeFigure

addAll

public void addAll(java.util.Collection<? extends Figure> figures)

addAll

public final void addAll(int index,
                         java.util.Collection<? extends Figure> figures)

basicAdd

public void basicAdd(Figure figure)

Description copied from interface: CompositeFigure

Adds a child to the figure without firing events.

This method can be used to reinsert a child figure which has been temporarily removed from this CompositeFigure (for example to reorder the sequence of the children) and to efficiently build a drawing from an InputFormat. This is a convenience method for calling basicAdd(getChildCount(), child);.

Specified by:

basicAdd in interface CompositeFigure

basicAddAll

public void basicAddAll(int index,
                        java.util.Collection<? extends Figure> newFigures)

addNotify

public void addNotify(Drawing drawing)

Description copied from interface: Figure

Informs a figure, that it has been added to a drawing. The figure must inform all FigureListeners that it has been added.

Specified by:

addNotify in interface Figure

Overrides:

addNotify in class AbstractFigure

removeNotify

public void removeNotify(Drawing drawing)

Description copied from interface: Figure

Informs a figure, that it has been removed from a drawing. The figure must inform all FigureListeners that it has been removed.

Specified by:

removeNotify in interface Figure

Overrides:

removeNotify in class AbstractFigure

remove

public boolean remove(Figure figure)

Description copied from interface: CompositeFigure

Removes the specified child. Returns true, if the Figure contained the removed child.

This is a convenience method for calling removeChild(getChildren().indexOf(child));

This method calls figureRemoved on all registered CompositeFigureListener's.

Specified by:

remove in interface CompositeFigure

removeChild

public Figure removeChild(int index)

Description copied from interface: CompositeFigure

Removes the child at the specified index. Returns the removed child figure.

Calls figureRemoved on all registered CompositeFigureListener's.

Specified by:

removeChild in interface CompositeFigure

removeAll

public void removeAll(java.util.Collection<? extends Figure> figures)

Removes all specified children.

See Also:

add(org.jhotdraw.draw.Figure)

removeAllChildren

public void removeAllChildren()

Removes all children.

Specified by:

removeAllChildren in interface CompositeFigure

See Also:

add(org.jhotdraw.draw.Figure)

basicRemoveAllChildren

public void basicRemoveAllChildren()

Removes all children.

Specified by:

basicRemoveAllChildren in interface CompositeFigure

See Also:

add(org.jhotdraw.draw.Figure)

basicRemoveAll

public void basicRemoveAll(java.util.Collection<? extends Figure> figures)

Removes all children.

See Also:

add(org.jhotdraw.draw.Figure)

sendToBack

public void sendToBack(Figure figure)

Sends a figure to the back of the composite figure.

Parameters:

figure - that is part of this composite figure

bringToFront

public void bringToFront(Figure figure)

Brings a figure to the front of the drawing.

Parameters:

figure - that is part of the drawing

transform

public void transform(java.awt.geom.AffineTransform tx)

Transforms the figure.

Specified by:

transform in interface Figure

Parameters:

tx - The transformation.

See Also:

Figure.getTransformRestoreData(), Figure.restoreTransformTo(java.lang.Object)

setBounds

public void setBounds(java.awt.geom.Point2D.Double anchor,
                      java.awt.geom.Point2D.Double lead)

Description copied from interface: Figure

Sets the logical and untransformed bounds of the figure.

This is used by Tool's which create a new Figure and by Tool's which connect a Figure to another Figure.

This is a basic operation which does not fire events. Use the following code sequence, if you need event firing:

 figure.willChange();
 figure.setBounds(...);
 figure.changed();
 

Specified by:

setBounds in interface Figure

Overrides:

setBounds in class AbstractFigure

Parameters:

anchor - the start point of the bounds

lead - the end point of the bounds

See Also:

Figure.getBounds()

getChildrenFrontToBack

public java.util.List<Figure> getChildrenFrontToBack()

Returns an iterator to iterate in Z-order front to back over the children.

set

public <T> void set(AttributeKey<T> key,
                    T value)

Description copied from interface: Figure

Sets an attribute on the figure and calls attributeChanged on all registered FigureListeners if the attribute value has changed.

For efficiency reasons, the drawing is not automatically repainted. If you want the drawing to be repainted when the attribute is changed, you can either use key.set(figure, value); or

 figure.willChange();
 figure.set(...);
 figure.changed();
 

Specified by:

set in interface Figure

See Also:

AttributeKey.set(org.jhotdraw.draw.Figure, T)

get

public <T> T get(AttributeKey<T> name)

Description copied from interface: Figure

Gets an attribute from the Figure.

Specified by:

get in interface Figure

Returns:

Returns the attribute value. If the Figure does not have an attribute with the specified key, returns key.getDefaultValue().

See Also:

AttributeKey.get(org.jhotdraw.draw.Figure)

getAttributes

public java.util.Map<AttributeKey,java.lang.Object> getAttributes()

Description copied from interface: Figure

Returns a view to all attributes of this figure. By convention, an unmodifiable map is returned.

Specified by:

getAttributes in interface Figure

getAttributesRestoreData

public java.lang.Object getAttributesRestoreData()

Description copied from interface: Figure

Gets data which can be used to restore the attributes of the figure after a set has been applied to it.

Specified by:

getAttributesRestoreData in interface Figure

restoreAttributesTo

public void restoreAttributesTo(java.lang.Object newData)

Description copied from interface: Figure

Restores the attributes of the figure to a previously stored state.

Specified by:

restoreAttributesTo in interface Figure

contains

public boolean contains(Figure f)

Description copied from interface: CompositeFigure

Returns true if this composite figure contains the specified figure.

This is a convenience method for calling getChildren().contains(f);.

Specified by:

contains in interface CompositeFigure

contains

public boolean contains(java.awt.geom.Point2D.Double p)

Description copied from interface: Figure

Checks if a point is contained by the figure.

This is used for hit testing by Tool's.

Specified by:

contains in interface Figure

findFigureInside

public Figure findFigureInside(java.awt.geom.Point2D.Double p)

Description copied from interface: Figure

Finds the innermost figure at the specified location.

In case of a CompositeFigure, this method descends into its children and into its children's children until the innermost figure is found.

This functionality is implemented using the Chain of Responsibility design pattern. A figure which is not composed of other figures returns itself if the point is contained by the figure. Composed figures pass the method call down to their children.

Specified by:

findFigureInside in interface Figure

Overrides:

findFigureInside in class AbstractFigure

Parameters:

p - A location on the drawing.

Returns:

Returns the innermost figure at the location, or null if the location is not contained in a figure.

findChild

public Figure findChild(java.awt.geom.Point2D.Double p)

findChildIndex

public int findChildIndex(java.awt.geom.Point2D.Double p)

getLayouter

public Layouter getLayouter()

Get a Layouter object which encapsulated a layout algorithm for this figure. Typically, a Layouter accesses the child components of this figure and arranges their graphical presentation.

Specified by:

getLayouter in interface CompositeFigure

Returns:

layout strategy used by this figure

layout

public void layout()

A layout algorithm is used to define how the child components should be laid out in relation to each other. The task for layouting the child components for presentation is delegated to a Layouter which can be plugged in at runtime.

Specified by:

layout in interface CompositeFigure

setLayouter

public void setLayouter(Layouter newLayouter)

Set a Layouter object which encapsulated a layout algorithm for this figure. Typically, a Layouter accesses the child components of this figure and arranges their graphical presentation. It is a good idea to set the Layouter in the protected initialize() method so it can be recreated if a GraphicalCompositeFigure is read and restored from a StorableInput stream.

Specified by:

setLayouter in interface CompositeFigure

Parameters:

newLayouter - encapsulation of a layout algorithm.

getPreferredSize

public Dimension2DDouble getPreferredSize()

Description copied from interface: Figure

The preferred size is used by Layouter to determine the preferred size of a Figure. For most Figure's this is the same as the dimensions returned by getBounds.

Specified by:

getPreferredSize in interface Figure

Overrides:

getPreferredSize in class AbstractFigure

draw

public void draw(java.awt.Graphics2D g)

Description copied from interface: Figure

Draws the figure.

Specified by:

draw in interface Figure

Parameters:

g - The Graphics2D to draw to.

getDecomposition

public java.util.Collection<Figure> getDecomposition()

Description copied from interface: Figure

Returns a decompositon of a figure into its parts. A figure is considered as a part of itself.

Specified by:

getDecomposition in interface Figure

Overrides:

getDecomposition in class AbstractFigure

read

public void read(DOMInput in)
          throws java.io.IOException

Specified by:

read in interface DOMStorable

Throws:

java.io.IOException

write

public void write(DOMOutput out)
           throws java.io.IOException

Specified by:

write in interface DOMStorable

Throws:

java.io.IOException

restoreTransformTo

public void restoreTransformTo(java.lang.Object geometry)

Description copied from interface: Figure

Restores the transform of the figure to a previously stored state.

Specified by:

restoreTransformTo in interface Figure

getTransformRestoreData

public java.lang.Object getTransformRestoreData()

Description copied from interface: Figure

Gets data which can be used to restore the transformation of the figure without loss of precision, after a transform has been applied to it.

Specified by:

getTransformRestoreData in interface Figure

See Also:

Figure.transform(AffineTransform)

basicAdd

public void basicAdd(int index,
                     Figure figure)

Description copied from interface: CompositeFigure

Adds a child to the figure at the specified index without firing events.

This method can be used to reinsert a child figure which has been temporarily removed from this CompositeFigure (for example to reorder the sequence of the children) and to efficiently build a drawing from an InputFormat.

Specified by:

basicAdd in interface CompositeFigure

basicRemoveChild

public Figure basicRemoveChild(int index)

Description copied from interface: CompositeFigure

Removes the child at the specified index without firing events.

This method can be used to temporarily remove a child from this CompositeFigure (for example to reorder the sequence of the children).

Returns the removed child figure.

Specified by:

basicRemoveChild in interface CompositeFigure

getChildren

public java.util.List<Figure> getChildren()

Description copied from interface: CompositeFigure

Returns an unchangeable list view on the children.

Specified by:

getChildren in interface CompositeFigure

getChildCount

public int getChildCount()

Description copied from interface: CompositeFigure

Returns the number of children.

This is a convenience method for calling getChildren().size();.

Specified by:

getChildCount in interface CompositeFigure

getChild

public Figure getChild(int index)

Description copied from interface: CompositeFigure

Returns the child figure at the specified index.

This is a convenience method for calling getChildren().get(index);.

Specified by:

getChild in interface CompositeFigure

clone

public AbstractCompositeFigure clone()

Description copied from interface: Figure

Returns a clone of the figure, with clones of all aggregated figures, such as children and decorators. The cloned figure does not clone the list of FigureListeners from its original.

Specified by:

clone in interface Figure

Overrides:

clone in class AbstractFigure

validate

protected void validate()

Overrides:

validate in class AbstractFigure

invalidate

protected void invalidate()

Description copied from class: AbstractFigure

Invalidates cached data of the Figure. This method must execute fast, because it can be called very often.

Overrides:

invalidate in class AbstractFigure

willChange

public void willChange()

Description copied from class: AbstractFigure

Informs that a figure is about to change something that affects the contents of its display box.

Specified by:

willChange in interface Figure

Overrides:

willChange in class AbstractFigure

See Also:

Figure.changed()

changed

public void changed()

Description copied from class: AbstractFigure

Informs that a figure changed the area of its display box.

Specified by:

changed in interface Figure

Overrides:

changed in class AbstractFigure

See Also:

Figure.willChange()

basicRemove

public int basicRemove(Figure child)

Description copied from interface: CompositeFigure

Removes the specified child without firing events.

This method can be used to temporarily remove a child from this CompositeFigure (for example to reorder the sequence of the children).

This is a convenience method for calling basicRemove(indexOf(child));.

Returns the index of the removed figure. Returns -1 if the figure was not a child of this CompositeFigure.

Specified by:

basicRemove in interface CompositeFigure

indexOf

public int indexOf(Figure child)

Description copied from interface: CompositeFigure

Returns the index of the specified child.

This is a convenience method for calling getChildren().indexOf(index);.

Specified by:

indexOf in interface CompositeFigure

Returns:

The index of the child, or -1 if the specified figure is not a child of this CompositeFigure.

getDrawingArea

public java.awt.geom.Rectangle2D.Double getDrawingArea()

Description copied from interface: Figure

Returns the drawing area of the figure as a Rectangle.

The drawing area is used to inform DrawingView about the area that is needed to draw this figure.

The drawing area needs to be large enough, to take line width, line caps and other decorations into account that exceed the bounds of the Figure.

Specified by:

getDrawingArea in interface Figure

getBounds

public java.awt.geom.Rectangle2D.Double getBounds()

Description copied from interface: Figure

Returns the untransformed logical bounds of the figure as a Rectangle.

The bounds are used by Handle objects for adjusting the figure and for aligning the figure on a grid.

Specified by:

getBounds in interface Figure

fireFigureAdded

protected void fireFigureAdded(Figure f,
                               int zIndex)

Notify all listenerList that have registered interest for notification on this event type.

fireFigureRemoved

protected void fireFigureRemoved(Figure f,
                                 int zIndex)

Notify all listenerList that have registered interest for notification on this event type.

removeCompositeFigureListener

public void removeCompositeFigureListener(CompositeFigureListener listener)

Description copied from interface: CompositeFigure

Removes a listener from this composite figure.

Specified by:

removeCompositeFigureListener in interface CompositeFigure

addCompositeFigureListener

public void addCompositeFigureListener(CompositeFigureListener listener)

Description copied from interface: CompositeFigure

Adds a listener for this composite figure.

Specified by:

addCompositeFigureListener in interface CompositeFigure