prajna.viz.render

Class TextNodeRenderer

java.lang.Object

prajna.viz.render.ShapeNodeRenderer

prajna.viz.render.TextNodeRenderer

All Implemented Interfaces:

NodeRenderer

public class TextNodeRenderer
extends ShapeNodeRenderer

Implementation of a NodeRenderer which renders the name of the node in a specified font and surrounds it by a geometric shape. The node's size is dependent on the provided font. The method which determines shape can be overridden so that a subclass can determine shape based upon node data. If the node is selected (and there is a shape drawn), the outline will be highlighted.

Author:

Edward Swing

Nested Class Summary

Nested classes/interfaces inherited from class prajna.viz.render.ShapeNodeRenderer

ShapeNodeRenderer.NodeShape

Constructor Summary

Constructors

Constructor and Description
TextNodeRenderer() Instantiates a new text 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.Font	getFont() Gets the font used by the 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 pick point is within the drawn area for the node.
void	setFont(java.awt.Font newFont) Sets the font used by the renderer.

Methods inherited from class prajna.viz.render.ShapeNodeRenderer

drawNodeShape, getColor, getNodeColor, getNodeShape, getShape, setColor, setShape

Methods inherited from class java.lang.Object

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

Constructor Detail

TextNodeRenderer

public TextNodeRenderer()

Instantiates a new text node renderer. The default background shape is a box.

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 display the text surrounded by a geometric shape. The font size derives the size of the node. The shape completely surrounds the text.

Specified by:

drawNode in interface NodeRenderer

Overrides:

drawNode in class ShapeNodeRenderer

Parameters:

g - the Graphics context to display the node

node - the node to display

loc - the loc

getFont

public java.awt.Font getFont()

Gets the font used by the renderer.

Returns:

newFont the font used by the 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 position defined, Null is returned.

Specified by:

getNodeBounds in interface NodeRenderer

Overrides:

getNodeBounds in class ShapeNodeRenderer

Parameters:

node - the node to be checked

loc - the node location

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

Overrides:

highlightNode in class ShapeNodeRenderer

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 pick point is within the drawn area for the node.

Specified by:

pickNode in interface NodeRenderer

Overrides:

pickNode in class ShapeNodeRenderer

Parameters:

node - the node to check for picking

pickPoint - the coordinate of the point to check

nodeLoc - the node loc

Returns:

whether the point is in the drawn area for this node

setFont

public void setFont(java.awt.Font newFont)

Sets the font used by the renderer.

Parameters:

newFont - the font used by the renderer