easik.states
Class AddPullbackConstraintState

java.lang.Object
  easik.states.EasikState
      easik.states.AddPullbackConstraintState

All Implemented Interfaces:

PathAcceptingState

public class AddPullbackConstraintState
extends EasikState
implements PathAcceptingState

This state makes a pullback constraint. When pushed, it will then push another state to get a path. Once the first path is received, it will push another request for a path. This repeated until four paths have been collected and then the constraint is created (as long as the paths are valid).

Since:

2006-05-23 Kevin Green

Version:

2006-08-15 Kevin Green

Author:

Kevin Green 2006, Vera Ranieri 2006

Field Summary

private boolean	_finished Stores whether the user has finished adding paths to this constraint
private java.util.ArrayList<SketchPath>	_paths The paths involved in this constraint
private int	_round The current path number being selected

Fields inherited from class easik.states.EasikState

_ourSketch

Constructor Summary

AddPullbackConstraintState(Sketch inSketch)
Constructor for creating a new state to collect paths and make a diagram.

Method Summary

private boolean	addDiagram() Add the diagram to the sketch
void	passPath(SketchPath inPath) Called when a new path has been completed by a state above this on the stack.
void	poppedOff() Nothing to do when it gets popped off, as it always pops itself off when completed.
void	pushedOn() When this state is pushed on, it sends a message in a popup and then pushes a path collection state.
java.lang.String	toString() This state is called "New Pullback Constraint"

Methods inherited from class easik.states.EasikState

cancelClicked, finishClicked, gotFocus, nextClicked, resetColors, selectionUpdated, setCancelButton, setFinishButton, setNextButton

Methods inherited from class java.lang.Object

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

Field Detail

_paths

private java.util.ArrayList<SketchPath> _paths

The paths involved in this constraint

_finished

private boolean _finished

Stores whether the user has finished adding paths to this constraint

_round

private int _round

The current path number being selected

Constructor Detail

AddPullbackConstraintState

public AddPullbackConstraintState(Sketch inSketch)

Constructor for creating a new state to collect paths and make a diagram.

Parameters:

inSketch - The sketch being worked with.

Method Detail

passPath

public void passPath(SketchPath inPath)

Called when a new path has been completed by a state above this on the stack. If it is null, then cancel, otherwise add it to the collection. When we get four paths, then we're finished (if they share a domain and codomain).

Specified by:

passPath in interface PathAcceptingState

Parameters:

inPath - The last path in, null if it was a cancellation

addDiagram

private boolean addDiagram()

Add the diagram to the sketch

Returns:

true if the constraint was successfully added to the sketch, false otherwise

pushedOn

public void pushedOn()

When this state is pushed on, it sends a message in a popup and then pushes a path collection state.

Specified by:

pushedOn in class EasikState

poppedOff

public void poppedOff()

Nothing to do when it gets popped off, as it always pops itself off when completed.

Specified by:

poppedOff in class EasikState

toString

public java.lang.String toString()

This state is called "New Pullback Constraint"

Specified by:

toString in class EasikState

Returns:

The string literal described above.