/*
* Copyright 2011 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jbpm.formbuilder.client.command;
import org.jbpm.formapi.client.CommonGlobals;
import org.jbpm.formbuilder.client.bus.UndoRedoEvent;
import org.jbpm.formbuilder.client.bus.UndoRedoHandler;
import org.jbpm.formbuilder.client.bus.UndoableEvent;
import org.jbpm.formbuilder.client.bus.UndoableHandler;
import org.jbpm.formbuilder.client.options.UndoRedoManager;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.user.client.ui.MenuItem;
import com.gwtent.reflection.client.Reflectable;
/**
* In charge of the action of undoing the last action
*/
@Reflectable
public class EditFormUndoCommand implements BaseCommand {
private final UndoRedoManager mgr = UndoRedoManager.getInstance();
private MenuItem item = null;
public EditFormUndoCommand() {
EventBus bus = CommonGlobals.getInstance().getEventBus();
bus.addHandler(UndoableEvent.TYPE, new UndoableHandler() {
@Override
public void onEvent(UndoableEvent event) {
checkEnabled();
}
@Override
public void undoAction(UndoableEvent event) { }
@Override
public void doAction(UndoableEvent event) { }
});
bus.addHandler(UndoRedoEvent.TYPE, new UndoRedoHandler() {
@Override
public void onEvent(UndoRedoEvent event) {
checkEnabled();
}
});
}
@Override
public void execute() {
mgr.undo();
checkEnabled();
}
@Override
public void setItem(MenuItem item) {
this.item = item;
checkEnabled();
}
@Override
public void setEmbeded(String profile) {
//shouldn't be disabled when embedded
}
private void checkEnabled() {
if (this.item != null) {
this.item.setEnabled(mgr.canUndo());
}
}
}