edu.umd.cs.piccolox.nodes
Class PLens

java.lang.Object
  edu.umd.cs.piccolo.PNode
      edu.umd.cs.piccolox.nodes.PLens

All Implemented Interfaces:

java.lang.Cloneable, java.awt.print.Printable, java.io.Serializable

public class PLens

extends PNode

PLens is a simple default lens implementation for Piccolo. See piccolo/examples LensExample for one possible use of this lens. Lens's are often application specific, it may be easiest to study this code, and then implement your own custom lens using the general principles illustrated here.

The basic design here is to add a PCamera as the child of a Pnode (the lens node). The camera is the viewing part of the lens, and the node is the title bar that can be used to move the lens around. Users of this lens will probably want to set up some lens specific event handler and attach it to the camera.

A lens also needs a layer that it will look at (it should not be the same as the layer that it’s added to because then it will draw itself in a recursive loop. Last of all the PLens will need to be added to the PCanvas layer (so that it can be seen by the main camera).

Version:

1.0

Author:

Jesse Grosjean

See Also:

Serialized Form

Field Summary

static java.awt.Paint	DEFAULT_DRAGBAR_PAINT
static java.awt.Paint	DEFAULT_LENS_PAINT
static double	LENS_DRAGBAR_HEIGHT

Fields inherited from class edu.umd.cs.piccolo.PNode

PROPERTY_BOUNDS, PROPERTY_CHILDREN, PROPERTY_CHILDREN_PICKABLE, PROPERTY_CLIENT_PROPERTIES, PROPERTY_FULL_BOUNDS, PROPERTY_PAINT, PROPERTY_PARENT, PROPERTY_PICKABLE, PROPERTY_TRANSFORM, PROPERTY_TRANSPARENCY, PROPERTY_VISIBLE

Fields inherited from interface java.awt.print.Printable

NO_SUCH_PAGE, PAGE_EXISTS

Constructor Summary

PLens()

PLens(PLayer layer)

Method Summary

void	addLayer(int index, PLayer layer)
PCamera	getCamera()
PPath	getDragBar()
PDragEventHandler	getLensDraggerHandler()
protected void	layoutChildren() Nodes that apply layout constraints to their children should override this method and do the layout there.
void	removeLayer(PLayer layer)

Methods inherited from class edu.umd.cs.piccolo.PNode

addActivity, addChild, addChild, addChildren, addClientProperty, addInputEventListener, addPropertyChangeListener, addPropertyChangeListener, animateToBounds, animateToColor, animateToPositionScaleRotation, animateToTransform, animateToTransparency, centerBoundsOnPoint, centerFullBoundsOnPoint, clone, computeFullBounds, endResizeBounds, findIntersectingNodes, firePropertyChange, fullIntersects, fullPaint, fullPick, getAllNodes, getAllNodes, getBounds, getBoundsChanged, getBoundsReference, getBoundsVolatile, getChild, getChildBoundsInvalid, getChildBoundsVolatile, getChildPaintInvalid, getChildrenCount, getChildrenIterator, getChildrenPickable, getChildrenReference, getClientProperty, getClientPropertyKeysIterator, getFullBounds, getFullBoundsInvalid, getFullBoundsReference, getGlobalBounds, getGlobalFullBounds, getGlobalRotation, getGlobalScale, getGlobalToLocalTransform, getGlobalTranslation, getHeight, getInverseTransform, getListenerList, getLocalToGlobalTransform, getOccluded, getOffset, getPaint, getPaintInvalid, getParent, getPickable, getRoot, getRotation, getScale, getTransform, getTransformReference, getTransparency, getUnionOfChildrenBounds, getVisible, getWidth, getX, getXOffset, getY, getYOffset, globalToLocal, globalToLocal, globalToLocal, indexOfChild, internalUpdateBounds, intersects, invalidateFullBounds, invalidateLayout, invalidatePaint, isAncestorOf, isDescendentOf, isDescendentOfRoot, isOpaque, lerp, localToGlobal, localToGlobal, localToGlobal, localToParent, localToParent, localToParent, moveInBackOf, moveInFrontOf, moveToBack, moveToFront, offset, paint, paintAfterChildren, paramString, parentBoundsChanged, parentToLocal, parentToLocal, parentToLocal, pick, pickAfterChildren, position, print, print, removeAllChildren, removeChild, removeChild, removeChildren, removeFromParent, removeInputEventListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaintFrom, reparent, replaceWith, resetBounds, rotate, rotateAboutPoint, rotateAboutPoint, rotateInPlace, scale, scaleAboutPoint, scaleAboutPoint, setBounds, setBounds, setBoundsChanged, setChildBoundsInvalid, setChildBoundsVolatile, setChildPaintInvalid, setChildrenPickable, setFullBoundsInvalid, setGlobalRotation, setGlobalScale, setGlobalTranslation, setHeight, setOccluded, setOffset, setOffset, setPaint, setPaintInvalid, setParent, setPickable, setRotation, setScale, setTransform, setTransparency, setVisible, setWidth, setX, setY, signalBoundsChanged, startResizeBounds, toImage, toImage, toString, transformBy, translate, validateFullBounds, validateFullPaint

Methods inherited from class java.lang.Object

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

Field Detail

LENS_DRAGBAR_HEIGHT

public static double LENS_DRAGBAR_HEIGHT

DEFAULT_DRAGBAR_PAINT

public static java.awt.Paint DEFAULT_DRAGBAR_PAINT

DEFAULT_LENS_PAINT

public static java.awt.Paint DEFAULT_LENS_PAINT

Constructor Detail

PLens

public PLens()

PLens

public PLens(PLayer layer)

Method Detail

getCamera

public PCamera getCamera()

getDragBar

public PPath getDragBar()

getLensDraggerHandler

public PDragEventHandler getLensDraggerHandler()

addLayer

public void addLayer(int index,
                     PLayer layer)

removeLayer

public void removeLayer(PLayer layer)

layoutChildren

protected void layoutChildren()

Description copied from class: PNode

Nodes that apply layout constraints to their children should override this method and do the layout there.

Overrides:

layoutChildren in class PNode