edu.umd.cs.jazz
Class ZVisualLeaf

java.lang.Object
  |
  +--edu.umd.cs.jazz.ZSceneGraphObject
        |
        +--edu.umd.cs.jazz.ZNode
              |
              +--edu.umd.cs.jazz.ZLeaf
                    |
                    +--edu.umd.cs.jazz.ZVisualLeaf

All Implemented Interfaces:

java.lang.Cloneable, java.io.Serializable, ZSerializable

public class ZVisualLeaf

extends ZLeaf

implements ZSerializable, java.io.Serializable

ZVisualLeaf is a leaf node that has one or more visual components that can be rendered. Many applications will attach all of their visual components to ZVisualLeafs.

Warning: Serialized and ZSerialized objects of this class will not be compatible with future Jazz releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Jazz. A future release of Jazz will provide support for long term persistence.

See Also:

Serialized Form

Fields inherited from class edu.umd.cs.jazz.ZNode

findable_DEFAULT, listenerList, pickable_DEFAULT, savable_DEFAULT

Fields inherited from class edu.umd.cs.jazz.ZSceneGraphObject

bounds, volatileBounds, volatileBounds_DEFAULT

Constructor Summary

ZVisualLeaf()
Constructs a new empty visual leaf node.

ZVisualLeaf(ZVisualComponent visualComponent)
Constructs a new visual leaf node with the specified visual component.

Method Summary

void	addVisualComponent(ZVisualComponent visualComponent) Add a new visual component to this leaf node.
void	clearVisualComponents() Remove all visual components from this visual leaf.
protected void	computeBounds() Recomputes and caches the bounds for this node.
protected java.lang.Object	duplicateObject() Returns a clone of this object.
ZVisualComponent	getFirstVisualComponent() Return the first visual component associated with this leaf, or null if there are none.
ZBounds	getVisualComponentBounds() Return a copy of the bounds of this node's visual components in local coordinates.
ZBounds	getVisualComponentGlobalBounds() Return a copy of the bounds of this node's visual components in global coordinates.
ZVisualComponent[]	getVisualComponents() Return the visual components associated with this visual leaf.
boolean	getVolatileBounds() Determines if this node is volatile.
boolean	pick(java.awt.geom.Rectangle2D rect, ZSceneGraphPath path) Returns true if any of this node's visual components are under the specified rectangle, and builds a ZSceneGraphPath to the node.
void	removeVisualComponent(ZVisualComponent visualComponent) Remove a visual component from this leaf node.
void	render(ZRenderContext renderContext) Renders this node which results its visual components getting painted.
void	setState(java.lang.String fieldType, java.lang.String fieldName, java.lang.Object fieldValue) Set some state of this object as it gets read back in.
void	setVisualComponent(ZVisualComponent visualComponent) Set the visual component associated with this leaf node.
void	trimToSize() Trims the capacity of the array that stores the visual components list to the actual number of points.
protected void	updateVolatility() Internal method to compute and cache the volatility of a node, to recursively call the parents to compute volatility.
void	writeObject(ZObjectOutputStream out) Write out all of this object's state.
void	writeObjectRecurse(ZObjectOutputStream out) Specify which objects this object references in order to write out the scenegraph properly

Methods inherited from class edu.umd.cs.jazz.ZNode

addClientProperty, addMouseListener, addMouseMotionListener, addNodeListener, dump, editor, extract, findNodes, fireEvent, fireMouseEvent, fireNodeEvent, getClientProperty, getGlobalBounds, getGlobalToLocalTransform, getLocalToGlobalTransform, getParent, getRoot, globalToLocal, globalToLocal, hasMouseListener, hasNodeListener, isAncestorOf, isDescendentOf, isFindable, isPickable, isSavable, localToGlobal, localToGlobal, lower, lowerTo, putClientProperty, raise, raiseTo, remove, removeMouseListener, removeMouseMotionListener, removeNodeListener, repaint, repaint, repaint, reparent, replaceWith, setEditorFactory, setFindable, setParent, setPickable, setSavable, updateBounds, updateObjectReferences, writeReplace

Methods inherited from class edu.umd.cs.jazz.ZSceneGraphObject

clone, getBounds, getBoundsReference, reshape, setBounds, setVolatileBounds

Methods inherited from class java.lang.Object

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

Constructor Detail

ZVisualLeaf

public ZVisualLeaf()

Constructs a new empty visual leaf node.

ZVisualLeaf

public ZVisualLeaf(ZVisualComponent visualComponent)

Constructs a new visual leaf node with the specified visual component.

Parameters:

visualComponent - The new visual component that this leaf displays.

Method Detail

duplicateObject

protected java.lang.Object duplicateObject()

Returns a clone of this object.

Overrides:

duplicateObject in class ZNode

See Also:

ZSceneGraphObject.duplicateObject()

trimToSize

public void trimToSize()

Trims the capacity of the array that stores the visual components list to the actual number of points. Normally, the visual components list array can be slightly larger than the number of points in the visual components list. An application can use this operation to minimize the storage of a visual components list.

Overrides:

trimToSize in class ZNode

addVisualComponent

public void addVisualComponent(ZVisualComponent visualComponent)

Add a new visual component to this leaf node. If this leaf already contains this component, then nothing happens.

Parameters:

visualComponent - The visual component to be added.

removeVisualComponent

public void removeVisualComponent(ZVisualComponent visualComponent)

Remove a visual component from this leaf node. If this leaf didn't already contains this component, then nothing happens.

Parameters:

visualComponent - The visual component to be removed.

setVisualComponent

public void setVisualComponent(ZVisualComponent visualComponent)

Set the visual component associated with this leaf node. If this node previously had any visual components associated with it, then those components will be replaced with the new one.

Parameters:

visualComponent - The new visual component for this node.

getVisualComponents

public final ZVisualComponent[] getVisualComponents()

Return the visual components associated with this visual leaf.

getFirstVisualComponent

public final ZVisualComponent getFirstVisualComponent()

Return the first visual component associated with this leaf, or null if there are none.

clearVisualComponents

public void clearVisualComponents()

Remove all visual components from this visual leaf.

updateVolatility

protected void updateVolatility()

Internal method to compute and cache the volatility of a node, to recursively call the parents to compute volatility. All parents of this node are also volatile when this is volatile. A leaf is volatile if either the node or any of its visual components are volatile.

Overrides:

updateVolatility in class ZNode

See Also:

ZSceneGraphObject.setVolatileBounds(boolean), getVolatileBounds()

getVolatileBounds

public boolean getVolatileBounds()

Determines if this node is volatile. A node is considered to be volatile if it is specifically set to be volatile with ZSceneGraphObject.setVolatileBounds(boolean). All parents of this node are also volatile when this is volatile.

Volatile objects are those objects that change regularly, such as an object that is animated, or one whose rendering depends on its context.

Overrides:

getVolatileBounds in class ZSceneGraphObject

Returns:

true if this node is volatile

See Also:

ZSceneGraphObject.setVolatileBounds(boolean)

render

public void render(ZRenderContext renderContext)

Renders this node which results its visual components getting painted.

The transform, clip, and composite will be set appropriately when this object is rendered. It is up to this object to restore the transform, clip, and composite of the Graphics2D if this node changes any of them. However, the color, font, and stroke are unspecified by Jazz. This object should set those things if they are used, but they do not need to be restored.

Overrides:

render in class ZNode

Parameters:

renderContext - The graphics context to use for rendering.

computeBounds

protected void computeBounds()

Recomputes and caches the bounds for this node. Generally this method is called by reshape when the bounds have changed, and it should rarely directly elsewhere. A ZVisualLeaf bounds is the bounds of the union of its visual components.

Overrides:

computeBounds in class ZSceneGraphObject

pick

public boolean pick(java.awt.geom.Rectangle2D rect,
                    ZSceneGraphPath path)

Returns true if any of this node's visual components are under the specified rectangle, and builds a ZSceneGraphPath to the node. Only returns "pickable" nodes.

Overrides:

pick in class ZNode

Parameters:

rect - Coordinates of pick rectangle in local coordinates

path - The path through the scenegraph to the picked node. Modified by this call.

Returns:

The picked node, or null if none

See Also:

ZDrawingSurface.pick(int, int)

getVisualComponentBounds

public ZBounds getVisualComponentBounds()

Return a copy of the bounds of this node's visual components in local coordinates. If this node does not have any visual components, then this returns null.

Returns:

The union of this node's visual component's bounds in local coordinates (or null if there are no visual components).

getVisualComponentGlobalBounds

public ZBounds getVisualComponentGlobalBounds()

Return a copy of the bounds of this node's visual components in global coordinates. If this node does not have any visual components, then this returns null. Note that global bounds are not cached, and this method involves some computation.

Returns:

The visual component's bounds in global coordinates (or null if there are no visual components).

writeObject

public void writeObject(ZObjectOutputStream out)
                 throws java.io.IOException

Write out all of this object's state.

Specified by:

writeObject in interface ZSerializable

Overrides:

writeObject in class ZNode

Parameters:

out - The stream that this object writes into

writeObjectRecurse

public void writeObjectRecurse(ZObjectOutputStream out)
                        throws java.io.IOException

Specify which objects this object references in order to write out the scenegraph properly

Specified by:

writeObjectRecurse in interface ZSerializable

Overrides:

writeObjectRecurse in class ZNode

Parameters:

out - The stream that this object writes into

setState

public void setState(java.lang.String fieldType,
                     java.lang.String fieldName,
                     java.lang.Object fieldValue)

Set some state of this object as it gets read back in. After the object is created with its default no-arg constructor, this method will be called on the object once for each bit of state that was written out through calls to ZObjectOutputStream.writeState() within the writeObject method.

Specified by:

setState in interface ZSerializable

Overrides:

setState in class ZNode

Parameters:

fieldType - The fully qualified type of the field

fieldName - The name of the field

fieldValue - The value of the field