Java tutorial
/** * Copyright 2013 Universidad Icesi * * This file is part of SongStock. * * SongStock is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * SongStock is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with SongStock. If not, see <http://www.gnu.org/licenses/>. **/ package co.shift.pcs.basic.web.client; import java.util.ArrayList; import java.util.List; import com.vaadin.annotations.AutoGenerated; import com.vaadin.ui.AbsoluteLayout; import com.vaadin.ui.CustomComponent; import com.vaadin.ui.MenuBar; import com.vaadin.ui.MenuBar.Command; import com.vaadin.ui.MenuBar.MenuItem; /** * Menu panel component. * @author Andres Paz * */ public class MenuPanel extends CustomComponent { /*- VaadinEditorProperties={"grid":"RegularGrid,20","showGrid":true,"snapToGrid":true,"snapToObject":true,"movingGuides":false,"snappingDistance":10} */ private static final long serialVersionUID = 1L; @AutoGenerated private AbsoluteLayout mainLayout; /** * The application's menu bar. */ @AutoGenerated private MenuBar menuBar; /** * The application's extension menu item. */ private MenuItem modulesMenu; /** * List of disabled menu item names. */ private List<String> disabledMenus; /** * The constructor should first build the main layout, set the * composition root and then do any custom initialization. * * The constructor will not be automatically regenerated by the * visual editor. */ public MenuPanel() { buildMainLayout(); setCompositionRoot(mainLayout); // User code disabledMenus = new ArrayList<String>(); // Create the File Menu /*MenuItem fileMenu = menuBar.addItem("File", null); MenuItem exitMenuItem = fileMenu.addItem("Exit", null); // Create the Modules Menu this.modulesMenu = menuBar.addItem("Modules", null);*/ } /** * Adds a new menu item to the modules menu with the specified caption, command and options. * @param caption for the menu item * @param command for the menu item's action * @param isEnabled indicates if the menu item is enabled when added * @return the menu item added */ public MenuItem addMenu(String caption, Command command, boolean isEnabled) { MenuItem menuItem = this.menuBar.addItem(caption, command); menuItem.setEnabled(isEnabled); return menuItem; } /** * Enables the disabled menu items. */ public void enableMenus() { disabledMenus.clear(); List<MenuItem> menuItems = this.modulesMenu.getChildren(); for (MenuItem menuItem : menuItems) { if (!menuItem.isEnabled()) { disabledMenus.add(menuItem.getText()); menuItem.setEnabled(true); } } } /** * Re-disables the disabled menu items. */ public void disableMenus() { List<MenuItem> menuItems = this.modulesMenu.getChildren(); for (MenuItem menuItem : menuItems) { if (disabledMenus.contains(menuItem.getText())) { menuItem.setEnabled(false); } } } /** * Sets the caption of a menu item. * @param caption of the menu item to set * @param newCaption for the menu item */ public void setMenuCaption(String caption, String newCaption) { if (getItem(caption) != null) { getItem(caption).setText(newCaption); } } /** * Sets the caption and command of a menu item. * @param caption of the menu item to set * @param newCaption for the menu item * @param newCommand for the menu item */ public void setMenuCaptionAndCommand(String caption, String newCaption, Command newCommand) { if (getItem(caption) != null) { getItem(caption).setCommand(newCommand); getItem(caption).setText(newCaption); } } /** * Gets the menu item for the given caption. * @param caption of the menu item to find * @return the menu item with the given caption, null if there is no menu item with that caption */ private MenuItem getItem(String caption) { List<MenuItem> menuItems = modulesMenu.getChildren(); MenuItem item = null; boolean go = true; for (int i = 0; i < menuItems.size() && go; i++) { if (menuItems.get(i).getText().equals(caption)) { item = menuItems.get(i); go = false; } } return item; } @AutoGenerated private AbsoluteLayout buildMainLayout() { // common part: create layout mainLayout = new AbsoluteLayout(); mainLayout.setImmediate(false); mainLayout.setWidth("1024px"); mainLayout.setHeight("23px"); // top-level component properties setWidth("1024px"); setHeight("23px"); // menuBar menuBar = new MenuBar(); menuBar.setImmediate(false); menuBar.setWidth("1024px"); menuBar.setHeight("23px"); mainLayout.addComponent(menuBar, "top:0.0px;left:0.0px;"); return mainLayout; } }