prajna.viz.render

Class FadeEdgeRenderer

java.lang.Object

prajna.viz.render.FadeEdgeRenderer

All Implemented Interfaces:

Temporal, EdgeRenderer, TimeEdgeRenderer

public class FadeEdgeRenderer
extends java.lang.Object
implements TimeEdgeRenderer

FadeEdgeRenderer implements a simple fadeout for TimedEdges. When an edge is not active during the current time, this renderer will mask the edge from display. Most other functions are passed directly to the sub-renderer, which is used for the actual drawing of the edge.

Author:

Edward Swing

Constructor Summary

Constructors

Constructor and Description
FadeEdgeRenderer(EdgeRenderer renderer) Creates a new FadeEdgeRenderer object.

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
java.util.Date	getCurTime() Returns the time used by the renderer to render the edges.
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.
void	highlightEdge(java.awt.Graphics g, java.lang.Object edge, java.awt.Point origLoc, java.awt.Point destLoc) Draws 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 pick point is within the drawn area for the edge.
void	setColor(java.awt.Color color) Sets the color for the EdgeRenderer.
void	setCurTime(java.util.Date time) Sets the time used by the renderer to render the edges.

Methods inherited from class java.lang.Object

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

Constructor Detail

FadeEdgeRenderer

public FadeEdgeRenderer(EdgeRenderer renderer)

Creates a new FadeEdgeRenderer object.

Parameters:

renderer - a sub-Renderer to use for the edges when visible

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. For edges which implement Sequential, thos method only draws them if the edge is active, or if the sequence has no time spans at all.

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

getCurTime

public java.util.Date getCurTime()

Returns the time used by the renderer to render the edges.

Specified by:

getCurTime in interface Temporal

Returns:

the time used to render the edges

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.

highlightEdge

public void highlightEdge(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:

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 pick point is within the drawn area for the edge.

Specified by:

pickEdge in interface EdgeRenderer

Parameters:

edge - the edge 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 color)

Sets the color for the EdgeRenderer. If this color is set, it will override any Edge color.

Specified by:

setColor in interface EdgeRenderer

Parameters:

color - the color for this renderer

setCurTime

public void setCurTime(java.util.Date time)

Sets the time used by the renderer to render the edges. The renderer may display edges that are active in a different style than those that are inactive.

Specified by:

setCurTime in interface Temporal

Parameters:

time - time used to render edges