sysModel.env
Class NullEnv

java.lang.Object
  sysModel.env.AGlobalEnv
      sysModel.env.NullEnv

public class NullEnv
extends AGlobalEnv

Dummy environment used if no other environment has been created or loaded yet.

Author:

Mathias Ricken

Nested Class Summary

Nested classes/interfaces inherited from class sysModel.env.AGlobalEnv

AGlobalEnv.ALocalEnv, AGlobalEnv.BreedLambda, AGlobalEnv.ILocalEnvVisitor

Field Summary

private static NullEnv

_instance Singleton instance.

Fields inherited from class sysModel.env.AGlobalEnv

_breedLambdas, _cmdFactory, _moveLambdas, _securityManager, _waterColor, OCEAN_BLUE

Constructor Summary

private

NullEnv() Private singleton constructor.

Method Summary

void	addFishToInternalData(AGlobalEnv.ALocalEnv localEnv, AFish fish) Add the fish to the global environment.
ILambda	editFish(AGlobalEnv.ALocalEnv localEnv, IFishFactory fishFactory, int button) Edit the fish.
java.awt.Dimension	getDisplaySize() Get size of the display.
java.awt.geom.Point2D.Double	getPanDelta(java.awt.geom.Point2D.Double delta) Ask the model how much to pan, given where the user scrolled.
ILambda	getToolTipText(java.awt.geom.Point2D.Double p) Get a tool tip description for a specific place in the environment.
java.awt.geom.Point2D.Double	getViewPosition(java.awt.geom.Point2D.Double pos) Ask the model where to scroll, given where the user has scrolled.
static NullEnv	instance() Return singleton instance.
AEnvFactory	makeEnvFactory() Get the environment settings class.
AGlobalEnv.ALocalEnv	makeLocalEnv(java.awt.geom.Point2D.Double p) Create a local environment for the position.
AGlobalEnv	parseEnvironment(Lexer l) Factory method for parsing a stream of tokens and creating a global environment from it.
protected void	parseFish(Lexer l) Parse fish and add them to the environment.
protected void	printHeader(java.io.PrintWriter pw) Print file header.
protected void	removeFishFromInternalData(AGlobalEnv.ALocalEnv localEnv) Remove the fish from the global environment.
void	returnHome(IScrollAdapter sa) The action to be executed if the display should return home.

Methods inherited from class sysModel.env.AGlobalEnv

addFish, deactivateBreedLambdas, deactivateMoveLambdas, drawBackground, makeDrawCmd, makeEditCmd, makeStepCmd, parse, removeFish, save

Methods inherited from class java.lang.Object

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

Field Detail

_instance

private static NullEnv _instance

Singleton instance.

Constructor Detail

NullEnv

private NullEnv()

Private singleton constructor.

Method Detail

instance

public static NullEnv instance()

Return singleton instance.

Returns:

singleton instance

addFishToInternalData

public void addFishToInternalData(AGlobalEnv.ALocalEnv localEnv,
                                  AFish fish)

Add the fish to the global environment.

Specified by:

addFishToInternalData in class AGlobalEnv

Parameters:

localEnv - local environment

fish - fish to add

removeFishFromInternalData

protected void removeFishFromInternalData(AGlobalEnv.ALocalEnv localEnv)

Remove the fish from the global environment.

Specified by:

removeFishFromInternalData in class AGlobalEnv

Parameters:

localEnv - local environment

editFish

public ILambda editFish(AGlobalEnv.ALocalEnv localEnv,
                        IFishFactory fishFactory,
                        int button)

Edit the fish.

Specified by:

editFish in class AGlobalEnv

Parameters:

localEnv - local environment

fishFactory -

button -

Returns:

lambda to edit the fish

makeLocalEnv

public AGlobalEnv.ALocalEnv makeLocalEnv(java.awt.geom.Point2D.Double p)

Create a local environment for the position.

Specified by:

makeLocalEnv in class AGlobalEnv

Parameters:

p - position

Returns:

local environment

parseEnvironment

public AGlobalEnv parseEnvironment(Lexer l)

Factory method for parsing a stream of tokens and creating a global environment from it.

Specified by:

parseEnvironment in class AGlobalEnv

Parameters:

l - lexer

Returns:

new global environment

parseFish

protected void parseFish(Lexer l)

Parse fish and add them to the environment.

Specified by:

parseFish in class AGlobalEnv

Parameters:

l - parser to read from

makeEnvFactory

public AEnvFactory makeEnvFactory()

Get the environment settings class.

Specified by:

makeEnvFactory in class AGlobalEnv

Returns:

environment settings class

printHeader

protected void printHeader(java.io.PrintWriter pw)

Print file header.

Specified by:

printHeader in class AGlobalEnv

Parameters:

pw - PrintWriter to use

getDisplaySize

public java.awt.Dimension getDisplaySize()

Get size of the display.

Specified by:

getDisplaySize in class AGlobalEnv

Returns:

size of the display in model coordinate units.

returnHome

public void returnHome(IScrollAdapter sa)

The action to be executed if the display should return home.

Specified by:

returnHome in class AGlobalEnv

Parameters:

sa - scroll adapter

getViewPosition

public java.awt.geom.Point2D.Double getViewPosition(java.awt.geom.Point2D.Double pos)

Ask the model where to scroll, given where the user has scrolled. If the environment just acts like a normal panal, it should return pos without modification. If the environment recenters, it should return a position in the middle of the pan area. All coordinates are in model coordinate units.

Specified by:

getViewPosition in class AGlobalEnv

Parameters:

pos - position where the user scrolled to

Returns:

position where the environment wants the view to be

See Also:

IDisplayAdapter.getPanDelta(java.awt.geom.Point2D.Double)

getPanDelta

public java.awt.geom.Point2D.Double getPanDelta(java.awt.geom.Point2D.Double delta)

Ask the model how much to pan, given where the user scrolled. If the environment just acts like a normal panal, it should return (0,0). If the environment recenters, it should return delta without modification. All coordinates are in model coordinate units.

Specified by:

getPanDelta in class AGlobalEnv

Parameters:

delta - how far the user scrolled

Returns:

how far the panel should scroll

See Also:

IDisplayAdapter.getViewPosition(java.awt.geom.Point2D.Double)

getToolTipText

public ILambda getToolTipText(java.awt.geom.Point2D.Double p)

Get a tool tip description for a specific place in the environment.

Specified by:

getToolTipText in class AGlobalEnv

Parameters:

p - mouse coordinates

Returns:

lambda for the simulation controller to execute. Must return the tooltip string.