Package org.kie.workbench.common.stunner.core.client.command

Class RedoCommandHandler<C extends org.kie.workbench.common.stunner.core.command.Command>

java.lang.Object

org.kie.workbench.common.stunner.core.client.command.RedoCommandHandler<C>

Type Parameters:

C - The command type.

@Dependent
public class RedoCommandHandler<C extends org.kie.workbench.common.stunner.core.command.Command>
extends Object

This handler is an util class that achieves command "re-do" features. It's behaviour is to keep in a command registry (usually a in-memory registry), the commands that have been "undone" for a given context. It allows further re-do ( re-execution ) of that commands. If at some point the user undo some commands and executes whatever new action that produces a new command, this registry is cleared so you cannot redo older commands. It can be used as: Inputs - Capture undo operations for commands and call the onUndoCommandExecuted method - Capture regular command executions and call the onCommandExecuted method Output - Check isEnabled to figure out if a re-do operation can be done. - Call clear to clear the internal commands registry and reset the re-do status. - If isEnabled is true, you can run the execute method. It runs last undone command on found this handler's registry.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	RedoCommandHandler()
	RedoCommandHandler(org.kie.workbench.common.stunner.core.client.api.SessionManager sessionManager, javax.enterprise.event.Event<org.kie.workbench.common.stunner.core.client.canvas.event.registration.RegisterChangedEvent> registerChangedEvent)

Method Summary

Modifier and Type	Method	Description
void	clear()
org.kie.workbench.common.stunner.core.command.CommandResult<?>	execute(Object context, org.kie.workbench.common.stunner.core.command.CommandManager commandManager)
protected org.appformer.client.stateControl.registry.Registry<C>	getRegistry()
boolean	isEnabled()
boolean	onCommandExecuted(C command)
boolean	onUndoCommandExecuted(C command)
void	setSession(org.kie.workbench.common.stunner.core.client.session.ClientSession clientSession)

Methods inherited from class java.lang.Object

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

Constructor Detail

RedoCommandHandler

protected RedoCommandHandler()

RedoCommandHandler

@Inject
public RedoCommandHandler(org.kie.workbench.common.stunner.core.client.api.SessionManager sessionManager,
                          javax.enterprise.event.Event<org.kie.workbench.common.stunner.core.client.canvas.event.registration.RegisterChangedEvent> registerChangedEvent)

Method Detail

onUndoCommandExecuted

public boolean onUndoCommandExecuted(C command)

onCommandExecuted

public boolean onCommandExecuted(C command)

execute

public org.kie.workbench.common.stunner.core.command.CommandResult<?> execute(Object context,
                                                                              org.kie.workbench.common.stunner.core.command.CommandManager commandManager)

setSession

public void setSession(org.kie.workbench.common.stunner.core.client.session.ClientSession clientSession)

isEnabled

public boolean isEnabled()

clear

public void clear()

getRegistry

protected org.appformer.client.stateControl.registry.Registry<C> getRegistry()