001/* 002 * Copyright 2012 GWT-Bootstrap 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package com.github.gwtbootstrap.client.ui; 017 018import com.github.gwtbootstrap.client.ui.base.IconAnchor; 019import com.github.gwtbootstrap.client.ui.base.UnorderedList; 020import com.github.gwtbootstrap.client.ui.event.HideEvent; 021import com.github.gwtbootstrap.client.ui.event.HideHandler; 022import com.github.gwtbootstrap.client.ui.event.ShowEvent; 023import com.github.gwtbootstrap.client.ui.event.ShowHandler; 024import com.google.gwt.dom.client.Style; 025import com.google.gwt.event.dom.client.ClickEvent; 026import com.google.gwt.event.dom.client.ClickHandler; 027import com.google.gwt.event.shared.HandlerManager; 028import com.google.gwt.event.shared.HandlerRegistration; 029import com.google.gwt.user.client.ui.Widget; 030 031//@formatter:off 032/** 033 * A dropdown that accepts any type of widget. 034 * <p> 035 * <h3>UiBinder Usage:</h3> 036 * 037 * <pre> 038 * {@code 039 * <b:DropdownContainer text="I am the Caption"> 040 * <b:NavHeader>Header</b:NavHeader> 041 * <b:NavLink>Link 1</b:NavLink> 042 * <b:NavLink>Link 2</b:NavLink> 043 * <b:Button>Hey you, I'm a button</b:Button> 044 * </b:DropdownContainer> 045 * } 046 * </pre> 047 * </p> 048 * 049 * @since 2.0.4.0 050 * 051 * @author Carlos Alexandro Becker 052 * @author Cássio de Freitas e Silva 053 * 054 * @see <a href="http://twitter.github.com/bootstrap/javascript.html#dropdowns">Bootstrap documentation</a> 055 * @see DropdownButton 056 * @see SplitDropdownButton 057 * @see Dropdown 058 */ 059public class DropdownContainer extends Dropdown { 060 061 private UnorderedList menu = new UnorderedList(); 062 private boolean menuVisible; 063 private HandlerManager handlerManager; 064 065 @Override 066 protected IconAnchor createTrigger() { 067 final IconAnchor trigger = super.createTrigger(); 068 trigger.addDomHandler(new ClickHandler() { 069 070 @Override 071 public void onClick(ClickEvent event) { 072 if (menuVisible) { 073 hideContainer(); 074 } else { 075 showContainer(); 076 } 077 } 078 }, ClickEvent.getType()); 079 080 return trigger; 081 } 082 083 public DropdownContainer() { 084 this(""); 085 } 086 087 public DropdownContainer(String caption) { 088 super(caption); 089 for (Widget widget : getChildren()) { 090 if (widget instanceof UnorderedList) { 091 menu = (UnorderedList) widget; 092 break; 093 } 094 } 095 menu.getElement().getStyle().clearDisplay(); 096 menu.getElement().getStyle().setDisplay(Style.Display.NONE); 097 098 handlerManager = createHandlerManager(); 099 } 100 101 public void showContainer() { 102 menu.getElement().getStyle().setDisplay(Style.Display.BLOCK); 103 menuVisible = true; 104 105 for (int i = 0; i < handlerManager.getHandlerCount(ShowEvent.getType()); i++) { 106 ShowHandler sh = handlerManager.getHandler(ShowEvent.getType(), i); 107 sh.onShow(new ShowEvent(null)); 108 } 109 } 110 111 public void hideContainer() { 112 menu.getElement().getStyle().setDisplay(Style.Display.NONE); 113 menuVisible = false; 114 115 for (int i = 0; i < handlerManager.getHandlerCount(HideEvent.getType()); i++) { 116 HideHandler hh = handlerManager.getHandler(HideEvent.getType(), i); 117 hh.onHide(new HideEvent(null)); 118 } 119 } 120 121 public HandlerRegistration addHideHandler(HideHandler hideHandler) { 122 return handlerManager.addHandler(HideEvent.getType(), hideHandler); 123 } 124 125 public HandlerRegistration addShowHandler(ShowHandler showHandler) { 126 return handlerManager.addHandler(ShowEvent.getType(), showHandler); 127 } 128}