程序包 com.example.graphics.command

类 CommandManager

java.lang.Object

com.example.graphics.command.CommandManager

public class CommandManager
extends Object

Manager for executing, undoing, and redoing commands. This is part of the Command pattern implementation.

字段概要

字段

修饰符和类型	字段	说明
private final Stack<Command>	redoStack
private final Stack<Command>	undoStack

构造器概要

构造器

构造器	说明
CommandManager()	Constructor initializes the command stacks

方法概要

修饰符和类型	方法	说明
boolean	canRedo()	Check if there are commands that can be redone
boolean	canUndo()	Check if there are commands that can be undone
void	clearHistory()	Clear all command history
void	executeCommand(Command command)	Execute a command and add it to the undo stack
boolean	redo()	Redo the most recently undone command
boolean	undo()	Undo the most recently executed command

从类继承的方法 java.lang.Object

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

字段详细资料

undoStack

private final Stack<Command> undoStack

redoStack

private final Stack<Command> redoStack

构造器详细资料

CommandManager

public CommandManager()

Constructor initializes the command stacks

方法详细资料

executeCommand

public void executeCommand(Command command)

Execute a command and add it to the undo stack

参数:

command - the command to execute

undo

public boolean undo()

Undo the most recently executed command

返回:

true if a command was undone, false if there are no commands to undo

redo

public boolean redo()

Redo the most recently undone command

返回:

true if a command was redone, false if there are no commands to redo

canUndo

public boolean canUndo()

Check if there are commands that can be undone

返回:

true if there are commands that can be undone, false otherwise

canRedo

public boolean canRedo()

Check if there are commands that can be redone

返回:

true if there are commands that can be redone, false otherwise

clearHistory

public void clearHistory()

Clear all command history