prajna.viz.render

Class SimpleNodeRenderer

java.lang.Object

prajna.viz.render.SimpleNodeRenderer

All Implemented Interfaces:

NodeRenderer

public class SimpleNodeRenderer
extends java.lang.Object
implements NodeRenderer

Simple implementation of a NodeRenderer. This NodeRenderer will display the nodes by drawing filled circles centered at the node's location, with a radius equal to the node's size. If the node is selected, the circle will have an outline. The node name is overlaid on the circle.

Author:

Edward Swing

Constructor Summary

Constructors

Constructor and Description
SimpleNodeRenderer() Instantiates a new simple node renderer with a default color of red, and size of 10.
SimpleNodeRenderer(java.awt.Color nodeColor, int nodeSize) Instantiates a new simple 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.
java.awt.Color	getColor() Gets the color for the Renderer, if any.
java.awt.Rectangle	getNodeBounds(java.lang.Object node, java.awt.Point loc) Returns the bounding box for the node using this renderer.
protected java.awt.Color	getNodeColor(java.lang.Object node) Get the color used for the node.
int	getSize() Gets the default size used to draw the nodes
void	highlightNode(java.awt.Graphics g, java.lang.Object node, java.awt.Point loc) highlights the node into the Graphics Context.
boolean	pickNode(java.lang.Object node, java.awt.Point loc, java.awt.Point pickPoint) Checks whether the specified pickpoint is within the drawn area for the node.
void	setColor(java.awt.Color nodeColor) Sets the color for the NodeRenderer.
void	setSize(int nodeSize) Sets the size used to draw the node.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleNodeRenderer

public SimpleNodeRenderer()

Instantiates a new simple node renderer with a default color of red, and size of 10.

SimpleNodeRenderer

public SimpleNodeRenderer(java.awt.Color nodeColor,
                  int nodeSize)

Instantiates a new simple node renderer.

Parameters:

nodeColor - the node color

nodeSize - the node size

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 renderer will draw the node as a filled circle, with radius equal to the node size.

Specified by:

drawNode in interface NodeRenderer

Parameters:

g - the Graphics context to display the node

node - the node to display

loc - the node location

getColor

public java.awt.Color getColor()

Gets the color for the Renderer, if any.

Specified by:

getColor in interface NodeRenderer

Returns:

the color used by the NodeRenderer

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 position defined, Null is returned.

Specified by:

getNodeBounds in interface NodeRenderer

Parameters:

node - the node to be checked

loc - The node location

Returns:

the bounding box for the node

getNodeColor

protected java.awt.Color getNodeColor(java.lang.Object node)

Get the color used for the node. Defaults to returning the node color set for the renderer in general. Subclasses can override this behavior, providing colors for nodes based upon attributes.

Parameters:

node - the node to query for the color

Returns:

the color of the node

getSize

public int getSize()

Gets the default size used to draw the nodes

Returns:

the size in pixels

highlightNode

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

highlights the node into the Graphics Context. This renderer will draw the node as a filled circle, with radius equal to the node size, and an outline in either black or white, depending on the node color.

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 loc,
               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

loc - 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 nodeColor)

Sets the color for the NodeRenderer. If this color is set, it will override any Node color.

Specified by:

setColor in interface NodeRenderer

Parameters:

nodeColor - The color for the NodeRenderer

setSize

public void setSize(int nodeSize)

Sets the size used to draw the node. If not set, the default size is 10 pixels.

Parameters:

nodeSize - the size to draw nodes, in pixels