edit

Class Edit

java.lang.Object

edit.Edit

public abstract class Edit
extends java.lang.Object

The Edit class represents the underlying model for the Edit menu. Included are methods for edit operations.

Constructor Summary

Constructors

Constructor and Description
Edit()

Method Summary

Methods

Modifier and Type	Method and Description
(package private) abstract void	copy() Copies the selected item.
(package private) abstract void	cut() Cuts the selected item.
(package private) abstract void	paste() Pastes the most recently copied/cut item.
(package private) abstract void	redo() Redoes the most recently undone change to the gradebook.
(package private) abstract void	undo() Undoes the most recent change to the gradebook.

Methods inherited from class java.lang.Object

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

Constructor Detail

Edit

public Edit()

Method Detail

undo

abstract void undo()

Undoes the most recent change to the gradebook.

    pre:
      //
      // A change to the gradebook must have been made during this session.
      //
      WorkSpace.prevGradebook != null;

    post:
      //
      // The current workspace gradebook is reverted to the previous gradebook,
      // and the futureGradebook is set to the old current gradebook.
      //
      WorkSpace.gradebook'.equals(WorkSpace.prevGradebook)
      && WorkSpace.prevGradebook' == null
      && WorkSpace.futureGradebook.equals(WorkSpace.gradebook);

redo

abstract void redo()

Redoes the most recently undone change to the gradebook.

    pre:
      //
      // A call to undo must have been made during this session.
      // The futureGradebook must not be null.
      //
      WorkSpace.futureGradebook != null;

    post:
      //
      // The current workspace gradebook is set to the future gradebook,
      // and the prevGradebook is set to the old current gradebook.
      //
      WorkSpace.gradebook'.equals(WorkSpace.futureGradebook)
      && WorkSpace.futureGradebook' == null
      && WorkSpace.prevGradebook.equals(WorkSpace.gradebook);

cut

abstract void cut()

Cuts the selected item.

    post:
      //
      // The clipboard must contain the contents of the selected context.
      // The selectedContext must also be cleared.
      //
      WorkSpace.clipboard.equals(WorkSpace.selectedContext)
      && WorkSpace.selectedContext'.empty();

copy

abstract void copy()

Copies the selected item.

    post:
      //
      // The clipboard must contain the contents of the selected context.
      //
      WorkSpace.clipboard.equals(WorkSpace.selectedContext);

paste

abstract void paste()

Pastes the most recently copied/cut item.

    pre:
      //
      // The clipboard must not be empty.
      //
      !WorkSpace.clipboard.empty();

    post:
      //
      // The current selected context must contain the contents of the
      // clipboard.
      //
      WorkSpace.selectedContext.equals(WorkSpace.clipboard);