/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you 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.apache.pivot.wtk;
import org.apache.pivot.beans.DefaultProperty;
import org.apache.pivot.util.ListenerList;
import org.apache.pivot.util.Vote;
/**
* Popup class that displays a cascading menu.
*/
@DefaultProperty("menu")
public class MenuPopup extends Window {
private static class MenuPopupListenerList extends ListenerList<MenuPopupListener>
implements MenuPopupListener {
@Override
public void menuChanged(MenuPopup menuPopup, Menu previousMenu) {
for (MenuPopupListener listener : this) {
listener.menuChanged(menuPopup, previousMenu);
}
}
}
private static class MenuPopupStateListenerList extends ListenerList<MenuPopupStateListener>
implements MenuPopupStateListener {
@Override
public Vote previewMenuPopupClose(MenuPopup menuPopup, boolean immediate) {
Vote vote = Vote.APPROVE;
for (MenuPopupStateListener listener : this) {
vote = vote.tally(listener.previewMenuPopupClose(menuPopup, immediate));
}
return vote;
}
@Override
public void menuPopupCloseVetoed(MenuPopup menuPopup, Vote reason) {
for (MenuPopupStateListener listener : this) {
listener.menuPopupCloseVetoed(menuPopup, reason);
}
}
@Override
public void menuPopupClosed(MenuPopup menuPopup) {
for (MenuPopupStateListener listener : this) {
listener.menuPopupClosed(menuPopup);
}
}
}
private Menu menu;
private boolean contextMenu = false;
private boolean closing = false;
private MenuPopupListenerList menuPopupListeners = new MenuPopupListenerList();
private MenuPopupStateListenerList menuPopupStateListeners = new MenuPopupStateListenerList();
public MenuPopup() {
this(null);
}
public MenuPopup(Menu menu) {
setMenu(menu);
installSkin(MenuPopup.class);
}
public Menu getMenu() {
return menu;
}
public void setMenu(Menu menu) {
Menu previousMenu = this.menu;
if (previousMenu != menu) {
this.menu = menu;
menuPopupListeners.menuChanged(this, previousMenu);
}
}
public boolean isContextMenu() {
return contextMenu;
}
public final void open(Display display, int x, int y) {
open(display, null, x, y);
}
public final void open(Display display, Point location) {
if (location == null) {
throw new IllegalArgumentException("location is null.");
}
open(display, null, location.x, location.y);
}
public final void open(Window owner, int x, int y) {
if (owner == null) {
throw new IllegalArgumentException();
}
open(owner.getDisplay(), owner, x, y);
}
public final void open(Window owner, Point location) {
if (location == null) {
throw new IllegalArgumentException("location is null.");
}
open(owner, location.x, location.y);
}
public void open(Display display, Window owner, int x, int y) {
contextMenu = true;
setLocation(x, y);
super.open(display, owner);
}
@Override
public boolean isClosing() {
return closing;
}
@Override
public final void close() {
close(false);
}
public void close(boolean immediate) {
if (!isClosed()) {
closing = true;
Vote vote = menuPopupStateListeners.previewMenuPopupClose(this, immediate);
if (vote == Vote.APPROVE) {
super.close();
closing = super.isClosing();
if (isClosed()) {
menuPopupStateListeners.menuPopupClosed(this);
}
} else if (vote == Vote.DENY){
closing = false;
menuPopupStateListeners.menuPopupCloseVetoed(this, vote);
}
}
if (isClosed()) {
contextMenu = false;
}
}
public ListenerList<MenuPopupListener> getMenuPopupListeners() {
return menuPopupListeners;
}
public ListenerList<MenuPopupStateListener> getMenuPopupStateListeners() {
return menuPopupStateListeners;
}
}