Java tutorial
/* * Copyright (c) 2008-2016 Haulmont. * * 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 com.haulmont.cuba.web.gui.components.mainwindow; import com.haulmont.cuba.gui.components.mainwindow.LogoutButton; import com.haulmont.cuba.web.AppUI; import com.haulmont.cuba.web.gui.components.WebAbstractComponent; import com.haulmont.cuba.web.toolkit.ui.CubaButton; import org.apache.commons.lang.StringUtils; public class WebLogoutButton extends WebAbstractComponent<CubaButton> implements LogoutButton { public static final String LOGOUT_BUTTON_STYLENAME = "c-logout-button"; public WebLogoutButton() { component = new CubaButton(); component.addStyleName(LOGOUT_BUTTON_STYLENAME); component.addClickListener(event -> logout()); } protected void logout() { AppUI ui = ((AppUI) component.getUI()); if (ui == null) { throw new IllegalStateException("Logout button is not attached to UI"); } ui.getApp().logout(); } @Override public void setStyleName(String name) { super.setStyleName(name); component.addStyleName(LOGOUT_BUTTON_STYLENAME); } @Override public String getStyleName() { return StringUtils.normalizeSpace(super.getStyleName().replace(LOGOUT_BUTTON_STYLENAME, "")); } }