prajna.viz.render

Class FadeNodeRenderer

java.lang.Object

prajna.viz.render.FadeNodeRenderer

All Implemented Interfaces:

Animatable, NodeRenderer

public class FadeNodeRenderer
extends java.lang.Object
implements NodeRenderer, Animatable

NodeRenderer which adds the capability of dynamically fading out a node during an animation. This renderer uses a sub-renderer for the actual drawing of the node, but interpolates the color from the color of the sub-renderer to a transparent color.

Author:

Edward Swing

Nested Class Summary

Nested classes/interfaces inherited from interface prajna.data.Animatable

Animatable.Animation

Constructor Summary

Constructors

Constructor and Description
FadeNodeRenderer(NodeRenderer renderer) Instantiates a new fade node renderer.

Method Summary

Methods

Modifier and Type	Method and Description
void	drawNode(java.awt.Graphics g, java.lang.Object node, java.awt.Point loc) Draws the node into the Graphics Context.
Animatable.Animation	getAnimationFlag() Get the animation flag
double	getAnimationStep() Get the animation step
java.awt.Color	getColor() Get the color for this node renderer.
java.awt.Rectangle	getNodeBounds(java.lang.Object node, java.awt.Point loc) Gets the node bounds.
void	highlightNode(java.awt.Graphics g, java.lang.Object node, java.awt.Point loc) Highlight a node.
boolean	pickNode(java.lang.Object node, java.awt.Point nodeLoc, java.awt.Point pickPoint) Checks whether the specified pickpoint is within the drawn area for the node.
void	setAnimationFlag(Animatable.Animation flag) Set the animation flag.
void	setAnimationStep(double frac) Set the animation step
void	setColor(java.awt.Color color) Set the color.

Methods inherited from class java.lang.Object

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

Constructor Detail

FadeNodeRenderer

public FadeNodeRenderer(NodeRenderer renderer)

Instantiates a new fade node renderer.

Parameters:

renderer - the renderer

Method Detail

drawNode

public void drawNode(java.awt.Graphics g,
            java.lang.Object node,
            java.awt.Point loc)

Draws the node into the Graphics Context. This method calculates the color based upon the animation step, with increasing transparency as the animation value increases.

Specified by:

drawNode in interface NodeRenderer

Parameters:

g - the Graphics context to display the node

node - the node to display

loc - The node location

getAnimationFlag

public Animatable.Animation getAnimationFlag()

Get the animation flag

Specified by:

getAnimationFlag in interface Animatable

Returns:

Animation.TRANSFORM

getAnimationStep

public double getAnimationStep()

Get the animation step

Specified by:

getAnimationStep in interface Animatable

Returns:

the current animation step

getColor

public java.awt.Color getColor()

Get the color for this node renderer. This returns the color from the sub-renderer

Specified by:

getColor in interface NodeRenderer

Returns:

the color of the sub-renderer

getNodeBounds

public java.awt.Rectangle getNodeBounds(java.lang.Object node,
                               java.awt.Point loc)

Gets the node bounds. This renderer delegates to the sub-renderer

Specified by:

getNodeBounds in interface NodeRenderer

Parameters:

node - the node

loc - the location of the node

Returns:

the bounds for the node

highlightNode

public void highlightNode(java.awt.Graphics g,
                 java.lang.Object node,
                 java.awt.Point loc)

Highlight a node. This simply delegates to the sub-renderer, drawing the node with no transparency.

Specified by:

highlightNode in interface NodeRenderer

Parameters:

g - the Graphics context to display the node

node - the node to display

loc - The node location

pickNode

public boolean pickNode(java.lang.Object node,
               java.awt.Point nodeLoc,
               java.awt.Point pickPoint)

Checks whether the specified pickpoint is within the drawn area for the node. This methods delegate to the sub-renderer

Specified by:

pickNode in interface NodeRenderer

Parameters:

node - the node to check for picking

nodeLoc - The node location

pickPoint - the coordinate of the point to check

Returns:

whether the point is in the drawn area for this node

setAnimationFlag

public void setAnimationFlag(Animatable.Animation flag)

Set the animation flag. Currently ignored

Specified by:

setAnimationFlag in interface Animatable

Parameters:

flag - animation flag

setAnimationStep

public void setAnimationStep(double frac)

Set the animation step

Specified by:

setAnimationStep in interface Animatable

Parameters:

frac - the animation step

setColor

public void setColor(java.awt.Color color)

Set the color. This sets the color for the sub-renderer

Specified by:

setColor in interface NodeRenderer

Parameters:

color - the color for this renderer