y.view
Class AbstractCustomHotSpotPainter

java.lang.Object
  y.view.AbstractCustomHotSpotPainter

All Implemented Interfaces:

GenericNodeRealizer.HotSpotHitTest, GenericNodeRealizer.HotSpotPainter

public abstract class AbstractCustomHotSpotPainter
extends java.lang.Object
implements GenericNodeRealizer.HotSpotPainter, GenericNodeRealizer.HotSpotHitTest

Abstract base class that can be used with customizations of GenericNodeRealizer instances. This base class contains utility functions and delegate the actual work to simpler abstract methods.

Constructor Summary

AbstractCustomHotSpotPainter()
Creates a new instance of AbstractCustomHotspotPainter that paints all 8 possible hot spots.

AbstractCustomHotSpotPainter(int mask)
Creates a new instance of AbstractCustomHotspotPainter using a bit mask to determine which of the 8 possible hotspots to use.

Method Summary

byte	hotSpotHit(NodeRealizer context, double hx, double hy) Used as a callback for the GenericNodeRealizer.hotSpotHit(double, double) method.
protected void	initGraphics(NodeRealizer context, java.awt.Graphics2D graphics) Utility method used by paintHotSpots(NodeRealizer, java.awt.Graphics2D) to initialize the graphics context.
protected abstract boolean	isHit(byte hotSpot, double centerX, double centerY, double testX, double testY) Callback method used by hotSpotHit(NodeRealizer, double ,double)
protected abstract void	paint(byte hotSpot, double centerX, double centerY, java.awt.Graphics2D graphics) Callback method called during paintHotSpots(NodeRealizer, java.awt.Graphics2D)
void	paintHotSpots(NodeRealizer context, java.awt.Graphics2D graphics) Used as a callback for the GenericNodeRealizer.paintHotSpots(Graphics2D) method.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractCustomHotSpotPainter

public AbstractCustomHotSpotPainter()

Creates a new instance of AbstractCustomHotspotPainter that paints all 8 possible hot spots.

AbstractCustomHotSpotPainter

public AbstractCustomHotSpotPainter(int mask)

Creates a new instance of AbstractCustomHotspotPainter using a bit mask to determine which of the 8 possible hotspots to use.

Parameters:

mask - the bit mask that specifies which hot spots to use. Consult the following table to determine which bit corresponds to which hot spot.

Bit	Hot Spot
1	north west
2	north
3	north east
4	west
5	east
6	south west
7	south
8	south east

In this context bit 1 means the least significant bit. E.g. if bits 4 and 5 are set (i.e. mask equals 24) the western and eastern hot spots will be used.

Method Detail

paint

protected abstract void paint(byte hotSpot,
                              double centerX,
                              double centerY,
                              java.awt.Graphics2D graphics)

Callback method called during paintHotSpots(NodeRealizer, java.awt.Graphics2D)

Parameters:

hotSpot - a NodeRealizer HOTSPOT constant defining the type of hotspot to paint

centerX - the center of the hotspot

centerY - the center of the hotspot

graphics - the graphics to draw on

isHit

protected abstract boolean isHit(byte hotSpot,
                                 double centerX,
                                 double centerY,
                                 double testX,
                                 double testY)

Callback method used by hotSpotHit(NodeRealizer, double ,double)

Parameters:

hotSpot - a NodeRealizer HOTSPOT constant defining the type of hotspot to test

centerX - the center of the hotspot

centerY - the center of the hotspot

testX - the center of the hit-test

testY - the center of the hit-test

Returns:

whether the hotspot has been hit

initGraphics

protected void initGraphics(NodeRealizer context,
                            java.awt.Graphics2D graphics)

Utility method used by paintHotSpots(NodeRealizer, java.awt.Graphics2D) to initialize the graphics context.

Parameters:

context - the realizer to obtain the context from

graphics - the graphics to initialize

paintHotSpots

public void paintHotSpots(NodeRealizer context,
                          java.awt.Graphics2D graphics)

Description copied from interface: GenericNodeRealizer.HotSpotPainter

Used as a callback for the GenericNodeRealizer.paintHotSpots(Graphics2D) method.

Specified by:

paintHotSpots in interface GenericNodeRealizer.HotSpotPainter

hotSpotHit

public byte hotSpotHit(NodeRealizer context,
                       double hx,
                       double hy)

Description copied from interface: GenericNodeRealizer.HotSpotHitTest

Used as a callback for the GenericNodeRealizer.hotSpotHit(double, double) method.

Specified by:

hotSpotHit in interface GenericNodeRealizer.HotSpotHitTest