prajna.viz.render

Class ClassNodeRenderer

java.lang.Object

prajna.viz.render.ClassNodeRenderer

All Implemented Interfaces:

NodeRenderer

public class ClassNodeRenderer
extends java.lang.Object
implements NodeRenderer

The ClassNodeRenderer provides a single renderer which will use different NodeRenderers to render different Object classes. Any number of different classes can be assigned a specific NodeRenderer. Any nodes which match that class will be rendered using the appropriate NodeRenderer. Any objects which do not have a specific NodeRenderer for their class will be rendered using a NodeRenderer for a superclass, if one exists. Failing that, a default NodeRenderer will be used.

Author:

Edward Swing

Constructor Summary

Constructors

Constructor and Description
ClassNodeRenderer() Create a ClassNodeRenderer with a SimpleNodeRenderer as the default renderer
ClassNodeRenderer(NodeRenderer renderer) Create a ClassNodeRenderer with the specified renderer as the default renderer

Method Summary

Methods

Modifier and Type	Method and Description
void	addClassRenderer(java.lang.Object sampleNode, NodeRenderer renderer) Add a NodeRenderer for a class of nodes.
void	drawNode(java.awt.Graphics g, java.lang.Object node, java.awt.Point loc) Draws the node into the Graphics Context.
java.awt.Color	getColor() This method returns the color of the default renderer.
java.awt.Rectangle	getNodeBounds(java.lang.Object node, java.awt.Point loc) Returns the bounding box for the node using this renderer.
void	highlightNode(java.awt.Graphics g, java.lang.Object node, java.awt.Point loc) Draws the node into the Graphics Context in a highlighted fashion.
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	setColor(java.awt.Color color) This method sets the color for the default renderer.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassNodeRenderer

public ClassNodeRenderer()

Create a ClassNodeRenderer with a SimpleNodeRenderer as the default renderer

ClassNodeRenderer

public ClassNodeRenderer(NodeRenderer renderer)

Create a ClassNodeRenderer with the specified renderer as the default renderer

Parameters:

renderer - the default NodeRenderer

Method Detail

addClassRenderer

public void addClassRenderer(java.lang.Object sampleNode,
                    NodeRenderer renderer)

Add a NodeRenderer for a class of nodes. The Class of the node is used to identify other nodes to render with the NodeRenderer.

Parameters:

sampleNode - A sample node of the appropriate class

renderer - The renderer to use for other nodes of the same Class.

drawNode

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

Draws the node into the Graphics Context. The appropriate NodeRenderer is selected based upon the class of node. The NodeRenderer is then used to display the node.

Specified by:

drawNode in interface NodeRenderer

Parameters:

g - the Graphics context to display the node

node - the node to display

loc - the location of the node

getColor

public java.awt.Color getColor()

This method returns the color of the default renderer. To get the color of one of the specific renderers, call getColor() on the specific renderer.

Specified by:

getColor in interface NodeRenderer

Returns:

the color for the default renderer

getNodeBounds

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

Returns the bounding box for the node using this renderer. Individual renderers should ensure that the drawn node is created entirely within the bounds returned. If the node has no location defined, null is returned.

Specified by:

getNodeBounds in interface NodeRenderer

Parameters:

node - The node to check

loc - The location of the node

Returns:

the bounding box for the node

highlightNode

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

Draws the node into the Graphics Context in a highlighted fashion.

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.

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

setColor

public void setColor(java.awt.Color color)

This method sets the color for the default renderer. To set the color of one of the specific renderers, call setColor() on the specific renderer.

Specified by:

setColor in interface NodeRenderer

Parameters:

color - the color for the default renderer