/*
* 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 java.util.HashMap;
import java.util.Map;
import org.jbpm.formapi.client.CommonGlobals;
import org.jbpm.formapi.client.form.FBFormItem;
import org.jbpm.formapi.client.form.LayoutFormItem;
import org.jbpm.formbuilder.client.bus.UndoableEvent;
import org.jbpm.formbuilder.client.bus.UndoableHandler;
import org.jbpm.formbuilder.client.bus.ui.FormItemAddedEvent;
import org.jbpm.formbuilder.client.bus.ui.FormItemRemovedEvent;
import org.jbpm.formbuilder.client.bus.ui.GetFormDisplayEvent;
import org.jbpm.formbuilder.client.form.FBForm;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.user.client.ui.HasOneWidget;
import com.google.gwt.user.client.ui.HasWidgets;
import com.google.gwt.user.client.ui.MenuItem;
import com.google.gwt.user.client.ui.Widget;
import com.gwtent.reflection.client.Reflectable;
/**
* Handles the action of pasting a component
*/
@Reflectable
public class PasteCommand extends AbstractCopyPasteCommand {
private final EventBus bus = CommonGlobals.getInstance().getEventBus();
public PasteCommand() {
super();
CommonGlobals.getInstance().registerPaste(this);
}
@Override
protected void enable(MenuItem menuItem) {
menuItem.setEnabled(AbstractCopyPasteCommand.getMemory() != null);
}
@Override
public void execute() {
Map<String, Object> dataSnapshot = new HashMap<String, Object>();
dataSnapshot.put("itemToHold", getSelectedItem() == null ? getFormDisplay() : getSelectedItem());
dataSnapshot.put("memory", AbstractCopyPasteCommand.getMemory());
fireUndoableEvent(dataSnapshot, new UndoableHandler() {
@Override
public void doAction(UndoableEvent event) {
Widget itemToHold = (Widget) event.getData("itemToHold");
Object obj = event.getData("memory");
if (obj instanceof FBFormItem) {
FBFormItem itemToPaste = (FBFormItem) obj;
itemToPaste = itemToPaste.cloneItem();
if (itemToHold == null) {
getFormDisplay().add(itemToPaste);
} else {
if (itemToHold instanceof LayoutFormItem) {
LayoutFormItem parentPanel = (LayoutFormItem) itemToHold;
parentPanel.add(itemToPaste);
} else if (itemToHold instanceof HasOneWidget) {
HasOneWidget parentPanel = (HasOneWidget) itemToHold;
parentPanel.setWidget(itemToPaste);
} else if (itemToHold instanceof HasWidgets) {
HasWidgets parentPanel = (HasWidgets) itemToHold;
parentPanel.add(itemToPaste);
}
}
bus.fireEvent(new FormItemAddedEvent(itemToPaste, itemToHold == null ? getFormDisplay() : itemToHold));
}
}
@Override
public void onEvent(UndoableEvent event) { }
@Override
public void undoAction(UndoableEvent event) {
FBFormItem itemToHold = (FBFormItem) event.getData("itemToHold");
Object obj = event.getData("memory");
if (itemToHold != null && obj instanceof FBFormItem) {
FBFormItem itemToPaste = (FBFormItem) obj;
itemToPaste.removeFromParent();
bus.fireEvent(new FormItemRemovedEvent(itemToPaste));
}
}
});
}
private FBForm getFormDisplay() {
GetFormDisplayEvent event = new GetFormDisplayEvent();
bus.fireEvent(event);
return event.getFormDisplay();
}
}