Java tutorial
/* * * Copyright (C) 2007-2015 Licensed to the Comunes Association (CA) under * one or more contributor license agreements (see COPYRIGHT for details). * The CA licenses this file to you under the GNU Affero General Public * License version 3, (the "License"); you may not use this file except in * compliance with the License. This file is part of kune. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * */ package cc.kune.bootstrap.client.actions.ui; import org.gwtbootstrap3.client.ui.Anchor; import org.gwtbootstrap3.client.ui.DropDown; import org.gwtbootstrap3.client.ui.DropDownMenu; import org.gwtbootstrap3.client.ui.constants.Pull; import org.gwtbootstrap3.client.ui.constants.Toggle; import cc.kune.common.client.actions.PropertyChangeEvent; import cc.kune.common.client.actions.PropertyChangeListener; import cc.kune.common.client.actions.ui.AbstractBasicGuiItem; import cc.kune.common.client.actions.ui.AbstractGuiItem; import cc.kune.common.client.actions.ui.ParentWidget; import cc.kune.common.client.actions.ui.descrip.GuiActionDescrip; import cc.kune.common.client.actions.ui.descrip.MenuDescriptor; import cc.kune.common.client.actions.ui.descrip.WidgetMenuDescriptor; import cc.kune.common.client.errors.UIException; import com.google.gwt.dom.client.Style.Display; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.dom.client.HasClickHandlers; import com.google.gwt.user.client.ui.HTMLPanel; import com.google.gwt.user.client.ui.HasEnabled; import com.google.gwt.user.client.ui.UIObject; import com.google.gwt.user.client.ui.Widget; public class BSWidgetMenuGui extends AbstractBasicGuiItem implements AbstractBSMenuGui { private DropDownMenu menu; private PopupBSMenuGui popup; private Widget widget; @Override public void add(final UIObject uiObject) { final Widget childWidget = (Widget) uiObject; menu.add(childWidget); } @Override public void configureItemFromProperties() { super.configureItemFromProperties(); descriptor.addPropertyChangeListener(new PropertyChangeListener() { @Override public void propertyChange(final PropertyChangeEvent event) { if (event.getPropertyName().equals(WidgetMenuDescriptor.MENU_CLEAR)) { menu.clear(); } } }); } @Override public AbstractGuiItem create(final GuiActionDescrip descriptor) { final Object value = descriptor.getValue(ParentWidget.PARENT_UI); if (value != null) { // Already created ... so reset ((BSWidgetMenuGui) value).getMenu().clear(); return this; } this.descriptor = descriptor; final DropDown dropDown = new DropDown(); final Anchor anchor = new Anchor(); anchor.setDataToggle(Toggle.DROPDOWN); dropDown.add(anchor); menu = new DropDownMenu(); widget = (Widget) descriptor.getValue(WidgetMenuDescriptor.WIDGET); popup = new PopupBSMenuGui(menu, widget, descriptor); dropDown.add(menu); HasClickHandlers widgetHasClick; try { widgetHasClick = (HasClickHandlers) widget; } catch (final ClassCastException e) { throw new UIException("Cannot cast to HasClickHandlers descriptor" + descriptor); } widgetHasClick.addClickHandler(new ClickHandler() { @Override public void onClick(final ClickEvent event) { event.stopPropagation(); clickHandlerDefault.onClick(event); show(); } }); descriptor.addPropertyChangeListener(new PropertyChangeListener() { @Override public void propertyChange(final PropertyChangeEvent event) { if (event.getPropertyName().equals(MenuDescriptor.MENU_HIDE)) { hide(); } else if (event.getPropertyName().equals(MenuDescriptor.MENU_SHOW)) { show(); } // } else if // (event.getPropertyName().equals(MenuDescriptor.MENU_SELECTION_DOWN)) // { // menu.moveSelectionDown(); // } else if // (event.getPropertyName().equals(MenuDescriptor.MENU_SELECTION_UP)) { // menu.moveSelectionUp(); // } else if // (event.getPropertyName().equals(MenuDescriptor.MENU_SELECT_ITEM)) { // final HasMenuItem item = (HasMenuItem) ((MenuItemDescriptor) // descriptor.getValue(MenuDescriptor.MENU_SELECT_ITEM)).getValue(MenuItemDescriptor.UI); // menu.selectItem((MenuItem) item.getMenuItem()); // } } }); if ((Boolean) descriptor.getValue(MenuDescriptor.MENU_ATRIGHT)) { menu.setPull(Pull.RIGHT); } descriptor.putValue(ParentWidget.PARENT_UI, this); initWidget(dropDown); configureItemFromProperties(); final String id = HTMLPanel.createUniqueId(); menu.getElement().setId(id); return this; } public DropDownMenu getMenu() { return menu; } @Override public void hide() { popup.hide(); } @Override public void insert(final int position, final UIObject uiObject) { menu.insert((Widget) uiObject, position); } @Override protected void setEnabled(final boolean enabled) { super.setEnabled(enabled); if (widget instanceof HasEnabled) { ((HasEnabled) widget).setEnabled(enabled); } } @Override public void setToolTipText(final String tooltipText) { setToolTipTextNextTo(widget, tooltipText); } @Override public void setVisible(final boolean visible) { super.setVisible(visible); if (widget != null) { widget.setVisible(visible); } } @Override public boolean shouldBeAdded() { // Because widget already exists return false; } @Override public void show() { menu.getElement().getStyle().setDisplay(Display.BLOCK); popup.show(); } }