prajna.viz.render

Class SimpleEdgeRenderer

java.lang.Object

prajna.viz.render.SimpleEdgeRenderer

All Implemented Interfaces:

EdgeRenderer

Direct Known Subclasses:

ArrowEdgeRenderer, WeightEdgeRenderer

public class SimpleEdgeRenderer
extends java.lang.Object
implements EdgeRenderer

Class which draws an edge with a simple line segment.

Author:

Edward Swing

Constructor Summary

Constructors

Constructor and Description
SimpleEdgeRenderer()

Method Summary

Methods

Modifier and Type	Method and Description
void	drawEdge(java.awt.Graphics g, java.lang.Object edge, java.awt.Point origLoc, java.awt.Point destLoc) Draws the edge into the Graphics Context.
java.awt.Color	getColor() Gets the color for the Renderer
protected java.awt.Color	getEdgeColor(java.lang.Object edge) Get the color used for the edge.
java.util.List<java.awt.Point>	getEdgePoints(java.lang.Object edge, java.awt.Point origLoc, java.awt.Point destLoc) Method to return the sequence of points used to draw the path for a particular edge.
java.awt.Color	getHighlight() Gets the highlight color for the Renderer
void	highlightEdge(java.awt.Graphics g, java.lang.Object edge, java.awt.Point origLoc, java.awt.Point destLoc) Highlights the edge into the Graphics Context.
boolean	pickEdge(java.lang.Object edge, java.awt.Point pickPoint, java.awt.Point origLoc, java.awt.Point destLoc) Checks whether the specified pickpoint is within the drawn area for the edge.
void	setColor(java.awt.Color edgeColor) Sets the color for the EdgeRenderer.
void	setHighlight(java.awt.Color highlight) Sets the highlight color for the EdgeRenderer.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleEdgeRenderer

public SimpleEdgeRenderer()

Method Detail

drawEdge

public void drawEdge(java.awt.Graphics g,
            java.lang.Object edge,
            java.awt.Point origLoc,
            java.awt.Point destLoc)

Draws the edge into the Graphics Context.

Specified by:

drawEdge in interface EdgeRenderer

Parameters:

g - the Graphics context to display the edge

edge - the edge to display

origLoc - location of the origin node

destLoc - location of the destination node

getColor

public java.awt.Color getColor()

Gets the color for the Renderer

Specified by:

getColor in interface EdgeRenderer

Returns:

the color for this renderer

getEdgeColor

protected java.awt.Color getEdgeColor(java.lang.Object edge)

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

Parameters:

edge - the edge to query for the color

Returns:

the color of the edge

getEdgePoints

public java.util.List<java.awt.Point> getEdgePoints(java.lang.Object edge,
                                           java.awt.Point origLoc,
                                           java.awt.Point destLoc)

Method to return the sequence of points used to draw the path for a particular edge. The list is returned in a strict order. The list does not include any decorative elements, such as arrowheads.

Specified by:

getEdgePoints in interface EdgeRenderer

Parameters:

edge - the GraphEdge to figure the points for

origLoc - location of the origin node

destLoc - location of the destination node

Returns:

a list of points for the edge.

getHighlight

public java.awt.Color getHighlight()

Gets the highlight color for the Renderer

Returns:

the highlight color for this renderer

highlightEdge

public void highlightEdge(java.awt.Graphics g,
                 java.lang.Object edge,
                 java.awt.Point origLoc,
                 java.awt.Point destLoc)

Highlights the edge into the Graphics Context. This method simply sets the edge color to the highlight color and invokes drawEdge().

Specified by:

highlightEdge in interface EdgeRenderer

Parameters:

g - the Graphics context to display the edge

edge - the edge to display

origLoc - location of the origin node

destLoc - location of the destination node

pickEdge

public boolean pickEdge(java.lang.Object edge,
               java.awt.Point pickPoint,
               java.awt.Point origLoc,
               java.awt.Point destLoc)

Checks whether the specified pickpoint is within the drawn area for the edge.

Specified by:

pickEdge in interface EdgeRenderer

Parameters:

edge - the node to check for picking

pickPoint - the coordinate of the point to check

origLoc - location of the origin node

destLoc - location of the destination node

Returns:

whether the point is in the drawn area for this edge

setColor

public void setColor(java.awt.Color edgeColor)

Sets the color for the EdgeRenderer.

Specified by:

setColor in interface EdgeRenderer

Parameters:

edgeColor - the color for this renderer

setHighlight

public void setHighlight(java.awt.Color highlight)

Sets the highlight color for the EdgeRenderer.

Parameters:

highlight - the color for this renderer